RE: [RFC,1/5] Thermal: rename thermal_sys.c to thermal_core.c

From: R, Durgadoss
Date: Mon Apr 01 2013 - 09:09:15 EST

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In reply to: Eduardo Valentin: "Re: [RFC,1/5] Thermal: rename thermal_sys.c to thermal_core.c"
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> -----Original Message-----
> From: Eduardo Valentin [mailto:eduardo.valentin@xxxxxx]
> Sent: Monday, April 01, 2013 6:14 PM
> To: Zhang, Rui
> Cc: linux-pm@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx;
> amit.daniel@xxxxxxxxxxx; R, Durgadoss; andi@xxxxxxxx
> Subject: Re: [RFC,1/5] Thermal: rename thermal_sys.c to thermal_core.c
>
> Hey Rui,
>
> On 27-03-2013 22:40, Zhang Rui wrote:
> > On Tue, 2013-03-26 at 18:04 -0400, Eduardo Valentin wrote:
> >> Hi Rui,
> >>
> >> A side note:
> >> I'd really appreciate if you could copy on your patches on
> >> drivers/thermal/. I had some issues with TI server and got un subscribed
> >> from linux-pm. Now I will try to catch up any way,
> >>
> > sure.
> >
> >> Some comments.
> >>
> >> On 26-03-2013 12:26, Zhang Rui wrote:
> >>> No functional change in this patch.
> >>>
> >>
> >> Just a better description would also help on code version control.
> >>
> > will add it in V2.
> >
> >>> Signed-off-by: Zhang Rui <rui.zhang@xxxxxxxxx>
> >>
> >> Apart from minor comments, I agreed with this change. So feel free to
> >> add my:
> >>
> >> Acked-by: Eduardo Valentin <eduardo.valentin@xxxxxx>
> >>
> > thanks!
> >
> >>>
> >>> ---
> >>> drivers/thermal/Makefile | 1 +
> >>> drivers/thermal/thermal_core.c | 1888
> ++++++++++++++++++++++++++++++++++++++++
> >>> drivers/thermal/thermal_sys.c | 1888 ----------------------------------------
> >>
> >> When sending renames, use git format-patch --find-renames, it makes a
> >> better summary of what you have done, specially if you have changed
> >> something in the file while renaming.
> >>
> > a useful tip. thanks!
> >>> 3 files changed, 1889 insertions(+), 1888 deletions(-)
> >>> create mode 100644 drivers/thermal/thermal_core.c
> >>> delete mode 100644 drivers/thermal/thermal_sys.c
> >>>
> >>> diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile
> >>> index d3a2b38..b2009bd 100644
> >>> --- a/drivers/thermal/Makefile
> >>> +++ b/drivers/thermal/Makefile
> >>> @@ -3,6 +3,7 @@
> >>> #
> >>>
> >>> obj-$(CONFIG_THERMAL) += thermal_sys.o
> >>
> >> I know this is for fixing the annoying bug with fan max speed. But while
> >> still here, do you think 'thermal_sys' is a good name for thermal
> >> framework driver? Maybe just 'thermal' would suffice?
> >>
> > as I said, there is already a thermal driver, aka,
> > driver/acpi/thermal.c.
> >
>
> In fact there is. On the other hand, it does not imply that this naming
> convention is correct, right?
>
> Unless you have a strong requirement to name these drivers the way it
> is, I'd suggest to take the opportunity to rename them.
> drivers/acpi/thermal.c could be named 'thermal-acpi.ko', if this does
> not violate any ACPI requirements. While this driver,
> drivers/thermal/thermal_sys.c, would be named only 'thermal.ko'.

Yes, I was also thinking of the same thing.
Can we do this Rui ?

Thanks,
Durga

>
>
> > thanks,
>
> Regards,
>
> Ed
>
> > rui
> >>> +thermal_sys-y += thermal_core.o
> >>>
> >>> # governors
> >>> obj-$(CONFIG_THERMAL_GOV_FAIR_SHARE) += fair_share.o
> >>> diff --git a/drivers/thermal/thermal_core.c
> b/drivers/thermal/thermal_core.c
> >>> new file mode 100644
> >>> index 0000000..5b7863a
> >>> --- /dev/null
> >>> +++ b/drivers/thermal/thermal_core.c
> >>> @@ -0,0 +1,1888 @@
> >>> +/*
> >>> + * thermal.c - Generic Thermal Management Sysfs support.
> >>> + *
> >>> + * Copyright (C) 2008 Intel Corp
> >>> + * Copyright (C) 2008 Zhang Rui <rui.zhang@xxxxxxxxx>
> >>> + * Copyright (C) 2008 Sujith Thomas <sujith.thomas@xxxxxxxxx>
> >>> + *
> >>> + *
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~~~~~~~~~~~~~~~
> >>> + *
> >>> + * This program is free software; you can redistribute it and/or modify
> >>> + * it under the terms of the GNU General Public License as published
> by
> >>> + * the Free Software Foundation; version 2 of the License.
> >>> + *
> >>> + * This program is distributed in the hope that it will be useful, but
> >>> + * WITHOUT ANY WARRANTY; without even the implied warranty of
> >>> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
> the GNU
> >>> + * General Public License for more details.
> >>> + *
> >>> + * You should have received a copy of the GNU General Public License
> along
> >>> + * with this program; if not, write to the Free Software Foundation,
> Inc.,
> >>> + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
> >>> + *
> >>> + *
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~~~~~~~~~~~~~~~
> >>> + */
> >>> +
> >>> +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> >>> +
> >>> +#include <linux/module.h>
> >>> +#include <linux/device.h>
> >>> +#include <linux/err.h>
> >>> +#include <linux/slab.h>
> >>> +#include <linux/kdev_t.h>
> >>> +#include <linux/idr.h>
> >>> +#include <linux/thermal.h>
> >>> +#include <linux/reboot.h>
> >>> +#include <net/netlink.h>
> >>> +#include <net/genetlink.h>
> >>> +
> >>> +#include "thermal_core.h"
> >>> +
> >>> +MODULE_AUTHOR("Zhang Rui");
> >>> +MODULE_DESCRIPTION("Generic thermal management sysfs
> support");
> >>> +MODULE_LICENSE("GPL");
> >>> +
> >>> +static DEFINE_IDR(thermal_tz_idr);
> >>> +static DEFINE_IDR(thermal_cdev_idr);
> >>> +static DEFINE_MUTEX(thermal_idr_lock);
> >>> +
> >>> +static LIST_HEAD(thermal_tz_list);
> >>> +static LIST_HEAD(thermal_cdev_list);
> >>> +static LIST_HEAD(thermal_governor_list);
> >>> +
> >>> +static DEFINE_MUTEX(thermal_list_lock);
> >>> +static DEFINE_MUTEX(thermal_governor_lock);
> >>> +
> >>> +static struct thermal_governor *__find_governor(const char *name)
> >>> +{
> >>> + struct thermal_governor *pos;
> >>> +
> >>> + list_for_each_entry(pos, &thermal_governor_list, governor_list)
> >>> + if (!strnicmp(name, pos->name, THERMAL_NAME_LENGTH))
> >>> + return pos;
> >>> +
> >>> + return NULL;
> >>> +}
> >>> +
> >>> +int thermal_register_governor(struct thermal_governor *governor)
> >>> +{
> >>> + int err;
> >>> + const char *name;
> >>> + struct thermal_zone_device *pos;
> >>> +
> >>> + if (!governor)
> >>> + return -EINVAL;
> >>> +
> >>> + mutex_lock(&thermal_governor_lock);
> >>> +
> >>> + err = -EBUSY;
> >>> + if (__find_governor(governor->name) == NULL) {
> >>> + err = 0;
> >>> + list_add(&governor->governor_list,
> &thermal_governor_list);
> >>> + }
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> +
> >>> + list_for_each_entry(pos, &thermal_tz_list, node) {
> >>> + if (pos->governor)
> >>> + continue;
> >>> + if (pos->tzp)
> >>> + name = pos->tzp->governor_name;
> >>> + else
> >>> + name = DEFAULT_THERMAL_GOVERNOR;
> >>> + if (!strnicmp(name, governor->name,
> THERMAL_NAME_LENGTH))
> >>> + pos->governor = governor;
> >>> + }
> >>> +
> >>> + mutex_unlock(&thermal_list_lock);
> >>> + mutex_unlock(&thermal_governor_lock);
> >>> +
> >>> + return err;
> >>> +}
> >>> +EXPORT_SYMBOL_GPL(thermal_register_governor);
> >>> +
> >>> +void thermal_unregister_governor(struct thermal_governor
> *governor)
> >>> +{
> >>> + struct thermal_zone_device *pos;
> >>> +
> >>> + if (!governor)
> >>> + return;
> >>> +
> >>> + mutex_lock(&thermal_governor_lock);
> >>> +
> >>> + if (__find_governor(governor->name) == NULL)
> >>> + goto exit;
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> +
> >>> + list_for_each_entry(pos, &thermal_tz_list, node) {
> >>> + if (!strnicmp(pos->governor->name, governor->name,
> >>> + THERMAL_NAME_LENGTH))
> >>> + pos->governor = NULL;
> >>> + }
> >>> +
> >>> + mutex_unlock(&thermal_list_lock);
> >>> + list_del(&governor->governor_list);
> >>> +exit:
> >>> + mutex_unlock(&thermal_governor_lock);
> >>> + return;
> >>> +}
> >>> +EXPORT_SYMBOL_GPL(thermal_unregister_governor);
> >>> +
> >>> +static int get_idr(struct idr *idr, struct mutex *lock, int *id)
> >>> +{
> >>> + int ret;
> >>> +
> >>> + if (lock)
> >>> + mutex_lock(lock);
> >>> + ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL);
> >>> + if (lock)
> >>> + mutex_unlock(lock);
> >>> + if (unlikely(ret < 0))
> >>> + return ret;
> >>> + *id = ret;
> >>> + return 0;
> >>> +}
> >>> +
> >>> +static void release_idr(struct idr *idr, struct mutex *lock, int id)
> >>> +{
> >>> + if (lock)
> >>> + mutex_lock(lock);
> >>> + idr_remove(idr, id);
> >>> + if (lock)
> >>> + mutex_unlock(lock);
> >>> +}
> >>> +
> >>> +int get_tz_trend(struct thermal_zone_device *tz, int trip)
> >>> +{
> >>> + enum thermal_trend trend;
> >>> +
> >>> + if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
> >>> + if (tz->temperature > tz->last_temperature)
> >>> + trend = THERMAL_TREND_RAISING;
> >>> + else if (tz->temperature < tz->last_temperature)
> >>> + trend = THERMAL_TREND_DROPPING;
> >>> + else
> >>> + trend = THERMAL_TREND_STABLE;
> >>> + }
> >>> +
> >>> + return trend;
> >>> +}
> >>> +EXPORT_SYMBOL(get_tz_trend);
> >>> +
> >>> +struct thermal_instance *get_thermal_instance(struct
> thermal_zone_device *tz,
> >>> + struct thermal_cooling_device *cdev, int trip)
> >>> +{
> >>> + struct thermal_instance *pos = NULL;
> >>> + struct thermal_instance *target_instance = NULL;
> >>> +
> >>> + mutex_lock(&tz->lock);
> >>> + mutex_lock(&cdev->lock);
> >>> +
> >>> + list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
> >>> + if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
> >>> + target_instance = pos;
> >>> + break;
> >>> + }
> >>> + }
> >>> +
> >>> + mutex_unlock(&cdev->lock);
> >>> + mutex_unlock(&tz->lock);
> >>> +
> >>> + return target_instance;
> >>> +}
> >>> +EXPORT_SYMBOL(get_thermal_instance);
> >>> +
> >>> +static void print_bind_err_msg(struct thermal_zone_device *tz,
> >>> + struct thermal_cooling_device *cdev, int ret)
> >>> +{
> >>> + dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n",
> >>> + tz->type, cdev->type, ret);
> >>> +}
> >>> +
> >>> +static void __bind(struct thermal_zone_device *tz, int mask,
> >>> + struct thermal_cooling_device *cdev)
> >>> +{
> >>> + int i, ret;
> >>> +
> >>> + for (i = 0; i < tz->trips; i++) {
> >>> + if (mask & (1 << i)) {
> >>> + ret = thermal_zone_bind_cooling_device(tz, i, cdev,
> >>> + THERMAL_NO_LIMIT,
> THERMAL_NO_LIMIT);
> >>> + if (ret)
> >>> + print_bind_err_msg(tz, cdev, ret);
> >>> + }
> >>> + }
> >>> +}
> >>> +
> >>> +static void __unbind(struct thermal_zone_device *tz, int mask,
> >>> + struct thermal_cooling_device *cdev)
> >>> +{
> >>> + int i;
> >>> +
> >>> + for (i = 0; i < tz->trips; i++)
> >>> + if (mask & (1 << i))
> >>> + thermal_zone_unbind_cooling_device(tz, i, cdev);
> >>> +}
> >>> +
> >>> +static void bind_cdev(struct thermal_cooling_device *cdev)
> >>> +{
> >>> + int i, ret;
> >>> + const struct thermal_zone_params *tzp;
> >>> + struct thermal_zone_device *pos = NULL;
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> +
> >>> + list_for_each_entry(pos, &thermal_tz_list, node) {
> >>> + if (!pos->tzp && !pos->ops->bind)
> >>> + continue;
> >>> +
> >>> + if (!pos->tzp && pos->ops->bind) {
> >>> + ret = pos->ops->bind(pos, cdev);
> >>> + if (ret)
> >>> + print_bind_err_msg(pos, cdev, ret);
> >>> + }
> >>> +
> >>> + tzp = pos->tzp;
> >>> + if (!tzp || !tzp->tbp)
> >>> + continue;
> >>> +
> >>> + for (i = 0; i < tzp->num_tbps; i++) {
> >>> + if (tzp->tbp[i].cdev || !tzp->tbp[i].match)
> >>> + continue;
> >>> + if (tzp->tbp[i].match(pos, cdev))
> >>> + continue;
> >>> + tzp->tbp[i].cdev = cdev;
> >>> + __bind(pos, tzp->tbp[i].trip_mask, cdev);
> >>> + }
> >>> + }
> >>> +
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +}
> >>> +
> >>> +static void bind_tz(struct thermal_zone_device *tz)
> >>> +{
> >>> + int i, ret;
> >>> + struct thermal_cooling_device *pos = NULL;
> >>> + const struct thermal_zone_params *tzp = tz->tzp;
> >>> +
> >>> + if (!tzp && !tz->ops->bind)
> >>> + return;
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> +
> >>> + /* If there is no platform data, try to use ops->bind */
> >>> + if (!tzp && tz->ops->bind) {
> >>> + list_for_each_entry(pos, &thermal_cdev_list, node) {
> >>> + ret = tz->ops->bind(tz, pos);
> >>> + if (ret)
> >>> + print_bind_err_msg(tz, pos, ret);
> >>> + }
> >>> + goto exit;
> >>> + }
> >>> +
> >>> + if (!tzp || !tzp->tbp)
> >>> + goto exit;
> >>> +
> >>> + list_for_each_entry(pos, &thermal_cdev_list, node) {
> >>> + for (i = 0; i < tzp->num_tbps; i++) {
> >>> + if (tzp->tbp[i].cdev || !tzp->tbp[i].match)
> >>> + continue;
> >>> + if (tzp->tbp[i].match(tz, pos))
> >>> + continue;
> >>> + tzp->tbp[i].cdev = pos;
> >>> + __bind(tz, tzp->tbp[i].trip_mask, pos);
> >>> + }
> >>> + }
> >>> +exit:
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +}
> >>> +
> >>> +static void thermal_zone_device_set_polling(struct
> thermal_zone_device *tz,
> >>> + int delay)
> >>> +{
> >>> + if (delay > 1000)
> >>> + mod_delayed_work(system_freezable_wq, &tz-
> >poll_queue,
> >>> + round_jiffies(msecs_to_jiffies(delay)));
> >>> + else if (delay)
> >>> + mod_delayed_work(system_freezable_wq, &tz-
> >poll_queue,
> >>> + msecs_to_jiffies(delay));
> >>> + else
> >>> + cancel_delayed_work(&tz->poll_queue);
> >>> +}
> >>> +
> >>> +static void monitor_thermal_zone(struct thermal_zone_device *tz)
> >>> +{
> >>> + mutex_lock(&tz->lock);
> >>> +
> >>> + if (tz->passive)
> >>> + thermal_zone_device_set_polling(tz, tz->passive_delay);
> >>> + else if (tz->polling_delay)
> >>> + thermal_zone_device_set_polling(tz, tz->polling_delay);
> >>> + else
> >>> + thermal_zone_device_set_polling(tz, 0);
> >>> +
> >>> + mutex_unlock(&tz->lock);
> >>> +}
> >>> +
> >>> +static void handle_non_critical_trips(struct thermal_zone_device *tz,
> >>> + int trip, enum thermal_trip_type trip_type)
> >>> +{
> >>> + if (tz->governor)
> >>> + tz->governor->throttle(tz, trip);
> >>> +}
> >>> +
> >>> +static void handle_critical_trips(struct thermal_zone_device *tz,
> >>> + int trip, enum thermal_trip_type trip_type)
> >>> +{
> >>> + long trip_temp;
> >>> +
> >>> + tz->ops->get_trip_temp(tz, trip, &trip_temp);
> >>> +
> >>> + /* If we have not crossed the trip_temp, we do not care. */
> >>> + if (tz->temperature < trip_temp)
> >>> + return;
> >>> +
> >>> + if (tz->ops->notify)
> >>> + tz->ops->notify(tz, trip, trip_type);
> >>> +
> >>> + if (trip_type == THERMAL_TRIP_CRITICAL) {
> >>> + dev_emerg(&tz->device,
> >>> + "critical temperature reached(%d C),shutting
> down\n",
> >>> + tz->temperature / 1000);
> >>> + orderly_poweroff(true);
> >>> + }
> >>> +}
> >>> +
> >>> +static void handle_thermal_trip(struct thermal_zone_device *tz, int
> trip)
> >>> +{
> >>> + enum thermal_trip_type type;
> >>> +
> >>> + tz->ops->get_trip_type(tz, trip, &type);
> >>> +
> >>> + if (type == THERMAL_TRIP_CRITICAL || type ==
> THERMAL_TRIP_HOT)
> >>> + handle_critical_trips(tz, trip, type);
> >>> + else
> >>> + handle_non_critical_trips(tz, trip, type);
> >>> + /*
> >>> + * Alright, we handled this trip successfully.
> >>> + * So, start monitoring again.
> >>> + */
> >>> + monitor_thermal_zone(tz);
> >>> +}
> >>> +
> >>> +static int thermal_zone_get_temp(struct thermal_zone_device *tz,
> >>> + unsigned long *temp)
> >>> +{
> >>> + int ret = 0;
> >>> +#ifdef CONFIG_THERMAL_EMULATION
> >>> + int count;
> >>> + unsigned long crit_temp = -1UL;
> >>> + enum thermal_trip_type type;
> >>> +#endif
> >>> +
> >>> + mutex_lock(&tz->lock);
> >>> +
> >>> + ret = tz->ops->get_temp(tz, temp);
> >>> +#ifdef CONFIG_THERMAL_EMULATION
> >>> + if (!tz->emul_temperature)
> >>> + goto skip_emul;
> >>> +
> >>> + for (count = 0; count < tz->trips; count++) {
> >>> + ret = tz->ops->get_trip_type(tz, count, &type);
> >>> + if (!ret && type == THERMAL_TRIP_CRITICAL) {
> >>> + ret = tz->ops->get_trip_temp(tz, count, &crit_temp);
> >>> + break;
> >>> + }
> >>> + }
> >>> +
> >>> + if (ret)
> >>> + goto skip_emul;
> >>> +
> >>> + if (*temp < crit_temp)
> >>> + *temp = tz->emul_temperature;
> >>> +skip_emul:
> >>> +#endif
> >>> + mutex_unlock(&tz->lock);
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static void update_temperature(struct thermal_zone_device *tz)
> >>> +{
> >>> + long temp;
> >>> + int ret;
> >>> +
> >>> + ret = thermal_zone_get_temp(tz, &temp);
> >>> + if (ret) {
> >>> + dev_warn(&tz->device, "failed to read out thermal zone
> %d\n",
> >>> + tz->id);
> >>> + return;
> >>> + }
> >>> +
> >>> + mutex_lock(&tz->lock);
> >>> + tz->last_temperature = tz->temperature;
> >>> + tz->temperature = temp;
> >>> + mutex_unlock(&tz->lock);
> >>> +}
> >>> +
> >>> +void thermal_zone_device_update(struct thermal_zone_device *tz)
> >>> +{
> >>> + int count;
> >>> +
> >>> + update_temperature(tz);
> >>> +
> >>> + for (count = 0; count < tz->trips; count++)
> >>> + handle_thermal_trip(tz, count);
> >>> +}
> >>> +EXPORT_SYMBOL(thermal_zone_device_update);
> >>> +
> >>> +static void thermal_zone_device_check(struct work_struct *work)
> >>> +{
> >>> + struct thermal_zone_device *tz = container_of(work, struct
> >>> + thermal_zone_device,
> >>> + poll_queue.work);
> >>> + thermal_zone_device_update(tz);
> >>> +}
> >>> +
> >>> +/* sys I/F for thermal zone */
> >>> +
> >>> +#define to_thermal_zone(_dev) \
> >>> + container_of(_dev, struct thermal_zone_device, device)
> >>> +
> >>> +static ssize_t
> >>> +type_show(struct device *dev, struct device_attribute *attr, char
> *buf)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> +
> >>> + return sprintf(buf, "%s\n", tz->type);
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +temp_show(struct device *dev, struct device_attribute *attr, char
> *buf)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + long temperature;
> >>> + int ret;
> >>> +
> >>> + ret = thermal_zone_get_temp(tz, &temperature);
> >>> +
> >>> + if (ret)
> >>> + return ret;
> >>> +
> >>> + return sprintf(buf, "%ld\n", temperature);
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +mode_show(struct device *dev, struct device_attribute *attr, char
> *buf)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + enum thermal_device_mode mode;
> >>> + int result;
> >>> +
> >>> + if (!tz->ops->get_mode)
> >>> + return -EPERM;
> >>> +
> >>> + result = tz->ops->get_mode(tz, &mode);
> >>> + if (result)
> >>> + return result;
> >>> +
> >>> + return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ?
> "enabled"
> >>> + : "disabled");
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +mode_store(struct device *dev, struct device_attribute *attr,
> >>> + const char *buf, size_t count)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + int result;
> >>> +
> >>> + if (!tz->ops->set_mode)
> >>> + return -EPERM;
> >>> +
> >>> + if (!strncmp(buf, "enabled", sizeof("enabled") - 1))
> >>> + result = tz->ops->set_mode(tz,
> THERMAL_DEVICE_ENABLED);
> >>> + else if (!strncmp(buf, "disabled", sizeof("disabled") - 1))
> >>> + result = tz->ops->set_mode(tz,
> THERMAL_DEVICE_DISABLED);
> >>> + else
> >>> + result = -EINVAL;
> >>> +
> >>> + if (result)
> >>> + return result;
> >>> +
> >>> + return count;
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +trip_point_type_show(struct device *dev, struct device_attribute
> *attr,
> >>> + char *buf)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + enum thermal_trip_type type;
> >>> + int trip, result;
> >>> +
> >>> + if (!tz->ops->get_trip_type)
> >>> + return -EPERM;
> >>> +
> >>> + if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip))
> >>> + return -EINVAL;
> >>> +
> >>> + result = tz->ops->get_trip_type(tz, trip, &type);
> >>> + if (result)
> >>> + return result;
> >>> +
> >>> + switch (type) {
> >>> + case THERMAL_TRIP_CRITICAL:
> >>> + return sprintf(buf, "critical\n");
> >>> + case THERMAL_TRIP_HOT:
> >>> + return sprintf(buf, "hot\n");
> >>> + case THERMAL_TRIP_PASSIVE:
> >>> + return sprintf(buf, "passive\n");
> >>> + case THERMAL_TRIP_ACTIVE:
> >>> + return sprintf(buf, "active\n");
> >>> + default:
> >>> + return sprintf(buf, "unknown\n");
> >>> + }
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +trip_point_temp_store(struct device *dev, struct device_attribute
> *attr,
> >>> + const char *buf, size_t count)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + int trip, ret;
> >>> + unsigned long temperature;
> >>> +
> >>> + if (!tz->ops->set_trip_temp)
> >>> + return -EPERM;
> >>> +
> >>> + if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
> >>> + return -EINVAL;
> >>> +
> >>> + if (kstrtoul(buf, 10, &temperature))
> >>> + return -EINVAL;
> >>> +
> >>> + ret = tz->ops->set_trip_temp(tz, trip, temperature);
> >>> +
> >>> + return ret ? ret : count;
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +trip_point_temp_show(struct device *dev, struct device_attribute
> *attr,
> >>> + char *buf)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + int trip, ret;
> >>> + long temperature;
> >>> +
> >>> + if (!tz->ops->get_trip_temp)
> >>> + return -EPERM;
> >>> +
> >>> + if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
> >>> + return -EINVAL;
> >>> +
> >>> + ret = tz->ops->get_trip_temp(tz, trip, &temperature);
> >>> +
> >>> + if (ret)
> >>> + return ret;
> >>> +
> >>> + return sprintf(buf, "%ld\n", temperature);
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +trip_point_hyst_store(struct device *dev, struct device_attribute
> *attr,
> >>> + const char *buf, size_t count)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + int trip, ret;
> >>> + unsigned long temperature;
> >>> +
> >>> + if (!tz->ops->set_trip_hyst)
> >>> + return -EPERM;
> >>> +
> >>> + if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
> >>> + return -EINVAL;
> >>> +
> >>> + if (kstrtoul(buf, 10, &temperature))
> >>> + return -EINVAL;
> >>> +
> >>> + /*
> >>> + * We are not doing any check on the 'temperature' value
> >>> + * here. The driver implementing 'set_trip_hyst' has to
> >>> + * take care of this.
> >>> + */
> >>> + ret = tz->ops->set_trip_hyst(tz, trip, temperature);
> >>> +
> >>> + return ret ? ret : count;
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +trip_point_hyst_show(struct device *dev, struct device_attribute
> *attr,
> >>> + char *buf)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + int trip, ret;
> >>> + unsigned long temperature;
> >>> +
> >>> + if (!tz->ops->get_trip_hyst)
> >>> + return -EPERM;
> >>> +
> >>> + if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
> >>> + return -EINVAL;
> >>> +
> >>> + ret = tz->ops->get_trip_hyst(tz, trip, &temperature);
> >>> +
> >>> + return ret ? ret : sprintf(buf, "%ld\n", temperature);
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +passive_store(struct device *dev, struct device_attribute *attr,
> >>> + const char *buf, size_t count)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + struct thermal_cooling_device *cdev = NULL;
> >>> + int state;
> >>> +
> >>> + if (!sscanf(buf, "%d\n", &state))
> >>> + return -EINVAL;
> >>> +
> >>> + /* sanity check: values below 1000 millicelcius don't make sense
> >>> + * and can cause the system to go into a thermal heart attack
> >>> + */
> >>> + if (state && state < 1000)
> >>> + return -EINVAL;
> >>> +
> >>> + if (state && !tz->forced_passive) {
> >>> + mutex_lock(&thermal_list_lock);
> >>> + list_for_each_entry(cdev, &thermal_cdev_list, node) {
> >>> + if (!strncmp("Processor", cdev->type,
> >>> + sizeof("Processor")))
> >>> + thermal_zone_bind_cooling_device(tz,
> >>> + THERMAL_TRIPS_NONE,
> cdev,
> >>> + THERMAL_NO_LIMIT,
> >>> + THERMAL_NO_LIMIT);
> >>> + }
> >>> + mutex_unlock(&thermal_list_lock);
> >>> + if (!tz->passive_delay)
> >>> + tz->passive_delay = 1000;
> >>> + } else if (!state && tz->forced_passive) {
> >>> + mutex_lock(&thermal_list_lock);
> >>> + list_for_each_entry(cdev, &thermal_cdev_list, node) {
> >>> + if (!strncmp("Processor", cdev->type,
> >>> + sizeof("Processor")))
> >>> + thermal_zone_unbind_cooling_device(tz,
> >>> +
> THERMAL_TRIPS_NONE,
> >>> + cdev);
> >>> + }
> >>> + mutex_unlock(&thermal_list_lock);
> >>> + tz->passive_delay = 0;
> >>> + }
> >>> +
> >>> + tz->forced_passive = state;
> >>> +
> >>> + thermal_zone_device_update(tz);
> >>> +
> >>> + return count;
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +passive_show(struct device *dev, struct device_attribute *attr,
> >>> + char *buf)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> +
> >>> + return sprintf(buf, "%d\n", tz->forced_passive);
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +policy_store(struct device *dev, struct device_attribute *attr,
> >>> + const char *buf, size_t count)
> >>> +{
> >>> + int ret = -EINVAL;
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + struct thermal_governor *gov;
> >>> +
> >>> + mutex_lock(&thermal_governor_lock);
> >>> +
> >>> + gov = __find_governor(buf);
> >>> + if (!gov)
> >>> + goto exit;
> >>> +
> >>> + tz->governor = gov;
> >>> + ret = count;
> >>> +
> >>> +exit:
> >>> + mutex_unlock(&thermal_governor_lock);
> >>> + return ret;
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +policy_show(struct device *dev, struct device_attribute *devattr, char
> *buf)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> +
> >>> + return sprintf(buf, "%s\n", tz->governor->name);
> >>> +}
> >>> +
> >>> +#ifdef CONFIG_THERMAL_EMULATION
> >>> +static ssize_t
> >>> +emul_temp_store(struct device *dev, struct device_attribute *attr,
> >>> + const char *buf, size_t count)
> >>> +{
> >>> + struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> + int ret = 0;
> >>> + unsigned long temperature;
> >>> +
> >>> + if (kstrtoul(buf, 10, &temperature))
> >>> + return -EINVAL;
> >>> +
> >>> + if (!tz->ops->set_emul_temp) {
> >>> + mutex_lock(&tz->lock);
> >>> + tz->emul_temperature = temperature;
> >>> + mutex_unlock(&tz->lock);
> >>> + } else {
> >>> + ret = tz->ops->set_emul_temp(tz, temperature);
> >>> + }
> >>> +
> >>> + return ret ? ret : count;
> >>> +}
> >>> +static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store);
> >>> +#endif/*CONFIG_THERMAL_EMULATION*/
> >>> +
> >>> +static DEVICE_ATTR(type, 0444, type_show, NULL);
> >>> +static DEVICE_ATTR(temp, 0444, temp_show, NULL);
> >>> +static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
> >>> +static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show,
> passive_store);
> >>> +static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show,
> policy_store);
> >>> +
> >>> +/* sys I/F for cooling device */
> >>> +#define to_cooling_device(_dev) \
> >>> + container_of(_dev, struct thermal_cooling_device, device)
> >>> +
> >>> +static ssize_t
> >>> +thermal_cooling_device_type_show(struct device *dev,
> >>> + struct device_attribute *attr, char *buf)
> >>> +{
> >>> + struct thermal_cooling_device *cdev = to_cooling_device(dev);
> >>> +
> >>> + return sprintf(buf, "%s\n", cdev->type);
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +thermal_cooling_device_max_state_show(struct device *dev,
> >>> + struct device_attribute *attr, char *buf)
> >>> +{
> >>> + struct thermal_cooling_device *cdev = to_cooling_device(dev);
> >>> + unsigned long state;
> >>> + int ret;
> >>> +
> >>> + ret = cdev->ops->get_max_state(cdev, &state);
> >>> + if (ret)
> >>> + return ret;
> >>> + return sprintf(buf, "%ld\n", state);
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +thermal_cooling_device_cur_state_show(struct device *dev,
> >>> + struct device_attribute *attr, char *buf)
> >>> +{
> >>> + struct thermal_cooling_device *cdev = to_cooling_device(dev);
> >>> + unsigned long state;
> >>> + int ret;
> >>> +
> >>> + ret = cdev->ops->get_cur_state(cdev, &state);
> >>> + if (ret)
> >>> + return ret;
> >>> + return sprintf(buf, "%ld\n", state);
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +thermal_cooling_device_cur_state_store(struct device *dev,
> >>> + struct device_attribute *attr,
> >>> + const char *buf, size_t count)
> >>> +{
> >>> + struct thermal_cooling_device *cdev = to_cooling_device(dev);
> >>> + unsigned long state;
> >>> + int result;
> >>> +
> >>> + if (!sscanf(buf, "%ld\n", &state))
> >>> + return -EINVAL;
> >>> +
> >>> + if ((long)state < 0)
> >>> + return -EINVAL;
> >>> +
> >>> + result = cdev->ops->set_cur_state(cdev, state);
> >>> + if (result)
> >>> + return result;
> >>> + return count;
> >>> +}
> >>> +
> >>> +static struct device_attribute dev_attr_cdev_type =
> >>> +__ATTR(type, 0444, thermal_cooling_device_type_show, NULL);
> >>> +static DEVICE_ATTR(max_state, 0444,
> >>> + thermal_cooling_device_max_state_show, NULL);
> >>> +static DEVICE_ATTR(cur_state, 0644,
> >>> + thermal_cooling_device_cur_state_show,
> >>> + thermal_cooling_device_cur_state_store);
> >>> +
> >>> +static ssize_t
> >>> +thermal_cooling_device_trip_point_show(struct device *dev,
> >>> + struct device_attribute *attr, char *buf)
> >>> +{
> >>> + struct thermal_instance *instance;
> >>> +
> >>> + instance =
> >>> + container_of(attr, struct thermal_instance, attr);
> >>> +
> >>> + if (instance->trip == THERMAL_TRIPS_NONE)
> >>> + return sprintf(buf, "-1\n");
> >>> + else
> >>> + return sprintf(buf, "%d\n", instance->trip);
> >>> +}
> >>> +
> >>> +/* Device management */
> >>> +
> >>> +#if defined(CONFIG_THERMAL_HWMON)
> >>> +
> >>> +/* hwmon sys I/F */
> >>> +#include <linux/hwmon.h>
> >>> +
> >>> +/* thermal zone devices with the same type share one hwmon device
> */
> >>> +struct thermal_hwmon_device {
> >>> + char type[THERMAL_NAME_LENGTH];
> >>> + struct device *device;
> >>> + int count;
> >>> + struct list_head tz_list;
> >>> + struct list_head node;
> >>> +};
> >>> +
> >>> +struct thermal_hwmon_attr {
> >>> + struct device_attribute attr;
> >>> + char name[16];
> >>> +};
> >>> +
> >>> +/* one temperature input for each thermal zone */
> >>> +struct thermal_hwmon_temp {
> >>> + struct list_head hwmon_node;
> >>> + struct thermal_zone_device *tz;
> >>> + struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
> >>> + struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
> >>> +};
> >>> +
> >>> +static LIST_HEAD(thermal_hwmon_list);
> >>> +
> >>> +static ssize_t
> >>> +name_show(struct device *dev, struct device_attribute *attr, char
> *buf)
> >>> +{
> >>> + struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev);
> >>> + return sprintf(buf, "%s\n", hwmon->type);
> >>> +}
> >>> +static DEVICE_ATTR(name, 0444, name_show, NULL);
> >>> +
> >>> +static ssize_t
> >>> +temp_input_show(struct device *dev, struct device_attribute *attr,
> char *buf)
> >>> +{
> >>> + long temperature;
> >>> + int ret;
> >>> + struct thermal_hwmon_attr *hwmon_attr
> >>> + = container_of(attr, struct thermal_hwmon_attr,
> attr);
> >>> + struct thermal_hwmon_temp *temp
> >>> + = container_of(hwmon_attr, struct
> thermal_hwmon_temp,
> >>> + temp_input);
> >>> + struct thermal_zone_device *tz = temp->tz;
> >>> +
> >>> + ret = thermal_zone_get_temp(tz, &temperature);
> >>> +
> >>> + if (ret)
> >>> + return ret;
> >>> +
> >>> + return sprintf(buf, "%ld\n", temperature);
> >>> +}
> >>> +
> >>> +static ssize_t
> >>> +temp_crit_show(struct device *dev, struct device_attribute *attr,
> >>> + char *buf)
> >>> +{
> >>> + struct thermal_hwmon_attr *hwmon_attr
> >>> + = container_of(attr, struct thermal_hwmon_attr,
> attr);
> >>> + struct thermal_hwmon_temp *temp
> >>> + = container_of(hwmon_attr, struct
> thermal_hwmon_temp,
> >>> + temp_crit);
> >>> + struct thermal_zone_device *tz = temp->tz;
> >>> + long temperature;
> >>> + int ret;
> >>> +
> >>> + ret = tz->ops->get_trip_temp(tz, 0, &temperature);
> >>> + if (ret)
> >>> + return ret;
> >>> +
> >>> + return sprintf(buf, "%ld\n", temperature);
> >>> +}
> >>> +
> >>> +
> >>> +static struct thermal_hwmon_device *
> >>> +thermal_hwmon_lookup_by_type(const struct thermal_zone_device
> *tz)
> >>> +{
> >>> + struct thermal_hwmon_device *hwmon;
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> + list_for_each_entry(hwmon, &thermal_hwmon_list, node)
> >>> + if (!strcmp(hwmon->type, tz->type)) {
> >>> + mutex_unlock(&thermal_list_lock);
> >>> + return hwmon;
> >>> + }
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +
> >>> + return NULL;
> >>> +}
> >>> +
> >>> +/* Find the temperature input matching a given thermal zone */
> >>> +static struct thermal_hwmon_temp *
> >>> +thermal_hwmon_lookup_temp(const struct thermal_hwmon_device
> *hwmon,
> >>> + const struct thermal_zone_device *tz)
> >>> +{
> >>> + struct thermal_hwmon_temp *temp;
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> + list_for_each_entry(temp, &hwmon->tz_list, hwmon_node)
> >>> + if (temp->tz == tz) {
> >>> + mutex_unlock(&thermal_list_lock);
> >>> + return temp;
> >>> + }
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +
> >>> + return NULL;
> >>> +}
> >>> +
> >>> +static int
> >>> +thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
> >>> +{
> >>> + struct thermal_hwmon_device *hwmon;
> >>> + struct thermal_hwmon_temp *temp;
> >>> + int new_hwmon_device = 1;
> >>> + int result;
> >>> +
> >>> + hwmon = thermal_hwmon_lookup_by_type(tz);
> >>> + if (hwmon) {
> >>> + new_hwmon_device = 0;
> >>> + goto register_sys_interface;
> >>> + }
> >>> +
> >>> + hwmon = kzalloc(sizeof(struct thermal_hwmon_device),
> GFP_KERNEL);
> >>> + if (!hwmon)
> >>> + return -ENOMEM;
> >>> +
> >>> + INIT_LIST_HEAD(&hwmon->tz_list);
> >>> + strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH);
> >>> + hwmon->device = hwmon_device_register(NULL);
> >>> + if (IS_ERR(hwmon->device)) {
> >>> + result = PTR_ERR(hwmon->device);
> >>> + goto free_mem;
> >>> + }
> >>> + dev_set_drvdata(hwmon->device, hwmon);
> >>> + result = device_create_file(hwmon->device, &dev_attr_name);
> >>> + if (result)
> >>> + goto free_mem;
> >>> +
> >>> + register_sys_interface:
> >>> + temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL);
> >>> + if (!temp) {
> >>> + result = -ENOMEM;
> >>> + goto unregister_name;
> >>> + }
> >>> +
> >>> + temp->tz = tz;
> >>> + hwmon->count++;
> >>> +
> >>> + snprintf(temp->temp_input.name, sizeof(temp-
> >temp_input.name),
> >>> + "temp%d_input", hwmon->count);
> >>> + temp->temp_input.attr.attr.name = temp->temp_input.name;
> >>> + temp->temp_input.attr.attr.mode = 0444;
> >>> + temp->temp_input.attr.show = temp_input_show;
> >>> + sysfs_attr_init(&temp->temp_input.attr.attr);
> >>> + result = device_create_file(hwmon->device, &temp-
> >temp_input.attr);
> >>> + if (result)
> >>> + goto free_temp_mem;
> >>> +
> >>> + if (tz->ops->get_crit_temp) {
> >>> + unsigned long temperature;
> >>> + if (!tz->ops->get_crit_temp(tz, &temperature)) {
> >>> + snprintf(temp->temp_crit.name,
> >>> + sizeof(temp->temp_crit.name),
> >>> + "temp%d_crit", hwmon->count);
> >>> + temp->temp_crit.attr.attr.name = temp-
> >temp_crit.name;
> >>> + temp->temp_crit.attr.attr.mode = 0444;
> >>> + temp->temp_crit.attr.show = temp_crit_show;
> >>> + sysfs_attr_init(&temp->temp_crit.attr.attr);
> >>> + result = device_create_file(hwmon->device,
> >>> + &temp->temp_crit.attr);
> >>> + if (result)
> >>> + goto unregister_input;
> >>> + }
> >>> + }
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> + if (new_hwmon_device)
> >>> + list_add_tail(&hwmon->node, &thermal_hwmon_list);
> >>> + list_add_tail(&temp->hwmon_node, &hwmon->tz_list);
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +
> >>> + return 0;
> >>> +
> >>> + unregister_input:
> >>> + device_remove_file(hwmon->device, &temp->temp_input.attr);
> >>> + free_temp_mem:
> >>> + kfree(temp);
> >>> + unregister_name:
> >>> + if (new_hwmon_device) {
> >>> + device_remove_file(hwmon->device, &dev_attr_name);
> >>> + hwmon_device_unregister(hwmon->device);
> >>> + }
> >>> + free_mem:
> >>> + if (new_hwmon_device)
> >>> + kfree(hwmon);
> >>> +
> >>> + return result;
> >>> +}
> >>> +
> >>> +static void
> >>> +thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
> >>> +{
> >>> + struct thermal_hwmon_device *hwmon;
> >>> + struct thermal_hwmon_temp *temp;
> >>> +
> >>> + hwmon = thermal_hwmon_lookup_by_type(tz);
> >>> + if (unlikely(!hwmon)) {
> >>> + /* Should never happen... */
> >>> + dev_dbg(&tz->device, "hwmon device lookup failed!\n");
> >>> + return;
> >>> + }
> >>> +
> >>> + temp = thermal_hwmon_lookup_temp(hwmon, tz);
> >>> + if (unlikely(!temp)) {
> >>> + /* Should never happen... */
> >>> + dev_dbg(&tz->device, "temperature input lookup
> failed!\n");
> >>> + return;
> >>> + }
> >>> +
> >>> + device_remove_file(hwmon->device, &temp->temp_input.attr);
> >>> + if (tz->ops->get_crit_temp)
> >>> + device_remove_file(hwmon->device, &temp-
> >temp_crit.attr);
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> + list_del(&temp->hwmon_node);
> >>> + kfree(temp);
> >>> + if (!list_empty(&hwmon->tz_list)) {
> >>> + mutex_unlock(&thermal_list_lock);
> >>> + return;
> >>> + }
> >>> + list_del(&hwmon->node);
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +
> >>> + device_remove_file(hwmon->device, &dev_attr_name);
> >>> + hwmon_device_unregister(hwmon->device);
> >>> + kfree(hwmon);
> >>> +}
> >>> +#else
> >>> +static int
> >>> +thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
> >>> +{
> >>> + return 0;
> >>> +}
> >>> +
> >>> +static void
> >>> +thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
> >>> +{
> >>> +}
> >>> +#endif
> >>> +
> >>> +/**
> >>> + * thermal_zone_bind_cooling_device - bind a cooling device to a
> thermal zone
> >>> + * @tz: thermal zone device
> >>> + * @trip: indicates which trip point the cooling devices is
> >>> + * associated with in this thermal zone.
> >>> + * @cdev: thermal cooling device
> >>> + *
> >>> + * This function is usually called in the thermal zone device .bind
> callback.
> >>> + */
> >>> +int thermal_zone_bind_cooling_device(struct thermal_zone_device
> *tz,
> >>> + int trip,
> >>> + struct thermal_cooling_device *cdev,
> >>> + unsigned long upper, unsigned long lower)
> >>> +{
> >>> + struct thermal_instance *dev;
> >>> + struct thermal_instance *pos;
> >>> + struct thermal_zone_device *pos1;
> >>> + struct thermal_cooling_device *pos2;
> >>> + unsigned long max_state;
> >>> + int result;
> >>> +
> >>> + if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
> >>> + return -EINVAL;
> >>> +
> >>> + list_for_each_entry(pos1, &thermal_tz_list, node) {
> >>> + if (pos1 == tz)
> >>> + break;
> >>> + }
> >>> + list_for_each_entry(pos2, &thermal_cdev_list, node) {
> >>> + if (pos2 == cdev)
> >>> + break;
> >>> + }
> >>> +
> >>> + if (tz != pos1 || cdev != pos2)
> >>> + return -EINVAL;
> >>> +
> >>> + cdev->ops->get_max_state(cdev, &max_state);
> >>> +
> >>> + /* lower default 0, upper default max_state */
> >>> + lower = lower == THERMAL_NO_LIMIT ? 0 : lower;
> >>> + upper = upper == THERMAL_NO_LIMIT ? max_state : upper;
> >>> +
> >>> + if (lower > upper || upper > max_state)
> >>> + return -EINVAL;
> >>> +
> >>> + dev =
> >>> + kzalloc(sizeof(struct thermal_instance), GFP_KERNEL);
> >>> + if (!dev)
> >>> + return -ENOMEM;
> >>> + dev->tz = tz;
> >>> + dev->cdev = cdev;
> >>> + dev->trip = trip;
> >>> + dev->upper = upper;
> >>> + dev->lower = lower;
> >>> + dev->target = THERMAL_NO_TARGET;
> >>> +
> >>> + result = get_idr(&tz->idr, &tz->lock, &dev->id);
> >>> + if (result)
> >>> + goto free_mem;
> >>> +
> >>> + sprintf(dev->name, "cdev%d", dev->id);
> >>> + result =
> >>> + sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev-
> >name);
> >>> + if (result)
> >>> + goto release_idr;
> >>> +
> >>> + sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);
> >>> + sysfs_attr_init(&dev->attr.attr);
> >>> + dev->attr.attr.name = dev->attr_name;
> >>> + dev->attr.attr.mode = 0444;
> >>> + dev->attr.show = thermal_cooling_device_trip_point_show;
> >>> + result = device_create_file(&tz->device, &dev->attr);
> >>> + if (result)
> >>> + goto remove_symbol_link;
> >>> +
> >>> + mutex_lock(&tz->lock);
> >>> + mutex_lock(&cdev->lock);
> >>> + list_for_each_entry(pos, &tz->thermal_instances, tz_node)
> >>> + if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
> >>> + result = -EEXIST;
> >>> + break;
> >>> + }
> >>> + if (!result) {
> >>> + list_add_tail(&dev->tz_node, &tz->thermal_instances);
> >>> + list_add_tail(&dev->cdev_node, &cdev-
> >thermal_instances);
> >>> + }
> >>> + mutex_unlock(&cdev->lock);
> >>> + mutex_unlock(&tz->lock);
> >>> +
> >>> + if (!result)
> >>> + return 0;
> >>> +
> >>> + device_remove_file(&tz->device, &dev->attr);
> >>> +remove_symbol_link:
> >>> + sysfs_remove_link(&tz->device.kobj, dev->name);
> >>> +release_idr:
> >>> + release_idr(&tz->idr, &tz->lock, dev->id);
> >>> +free_mem:
> >>> + kfree(dev);
> >>> + return result;
> >>> +}
> >>> +EXPORT_SYMBOL(thermal_zone_bind_cooling_device);
> >>> +
> >>> +/**
> >>> + * thermal_zone_unbind_cooling_device - unbind a cooling device
> from a thermal zone
> >>> + * @tz: thermal zone device
> >>> + * @trip: indicates which trip point the cooling devices is
> >>> + * associated with in this thermal zone.
> >>> + * @cdev: thermal cooling device
> >>> + *
> >>> + * This function is usually called in the thermal zone device .unbind
> callback.
> >>> + */
> >>> +int thermal_zone_unbind_cooling_device(struct thermal_zone_device
> *tz,
> >>> + int trip,
> >>> + struct thermal_cooling_device *cdev)
> >>> +{
> >>> + struct thermal_instance *pos, *next;
> >>> +
> >>> + mutex_lock(&tz->lock);
> >>> + mutex_lock(&cdev->lock);
> >>> + list_for_each_entry_safe(pos, next, &tz->thermal_instances,
> tz_node) {
> >>> + if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
> >>> + list_del(&pos->tz_node);
> >>> + list_del(&pos->cdev_node);
> >>> + mutex_unlock(&cdev->lock);
> >>> + mutex_unlock(&tz->lock);
> >>> + goto unbind;
> >>> + }
> >>> + }
> >>> + mutex_unlock(&cdev->lock);
> >>> + mutex_unlock(&tz->lock);
> >>> +
> >>> + return -ENODEV;
> >>> +
> >>> +unbind:
> >>> + device_remove_file(&tz->device, &pos->attr);
> >>> + sysfs_remove_link(&tz->device.kobj, pos->name);
> >>> + release_idr(&tz->idr, &tz->lock, pos->id);
> >>> + kfree(pos);
> >>> + return 0;
> >>> +}
> >>> +EXPORT_SYMBOL(thermal_zone_unbind_cooling_device);
> >>> +
> >>> +static void thermal_release(struct device *dev)
> >>> +{
> >>> + struct thermal_zone_device *tz;
> >>> + struct thermal_cooling_device *cdev;
> >>> +
> >>> + if (!strncmp(dev_name(dev), "thermal_zone",
> >>> + sizeof("thermal_zone") - 1)) {
> >>> + tz = to_thermal_zone(dev);
> >>> + kfree(tz);
> >>> + } else {
> >>> + cdev = to_cooling_device(dev);
> >>> + kfree(cdev);
> >>> + }
> >>> +}
> >>> +
> >>> +static struct class thermal_class = {
> >>> + .name = "thermal",
> >>> + .dev_release = thermal_release,
> >>> +};
> >>> +
> >>> +/**
> >>> + * thermal_cooling_device_register - register a new thermal cooling
> device
> >>> + * @type: the thermal cooling device type.
> >>> + * @devdata: device private data.
> >>> + * @ops: standard thermal cooling devices callbacks.
> >>> + */
> >>> +struct thermal_cooling_device *
> >>> +thermal_cooling_device_register(char *type, void *devdata,
> >>> + const struct thermal_cooling_device_ops
> *ops)
> >>> +{
> >>> + struct thermal_cooling_device *cdev;
> >>> + int result;
> >>> +
> >>> + if (type && strlen(type) >= THERMAL_NAME_LENGTH)
> >>> + return ERR_PTR(-EINVAL);
> >>> +
> >>> + if (!ops || !ops->get_max_state || !ops->get_cur_state ||
> >>> + !ops->set_cur_state)
> >>> + return ERR_PTR(-EINVAL);
> >>> +
> >>> + cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
> >>> + if (!cdev)
> >>> + return ERR_PTR(-ENOMEM);
> >>> +
> >>> + result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id);
> >>> + if (result) {
> >>> + kfree(cdev);
> >>> + return ERR_PTR(result);
> >>> + }
> >>> +
> >>> + strcpy(cdev->type, type ? : "");
> >>> + mutex_init(&cdev->lock);
> >>> + INIT_LIST_HEAD(&cdev->thermal_instances);
> >>> + cdev->ops = ops;
> >>> + cdev->updated = true;
> >>> + cdev->device.class = &thermal_class;
> >>> + cdev->devdata = devdata;
> >>> + dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
> >>> + result = device_register(&cdev->device);
> >>> + if (result) {
> >>> + release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev-
> >id);
> >>> + kfree(cdev);
> >>> + return ERR_PTR(result);
> >>> + }
> >>> +
> >>> + /* sys I/F */
> >>> + if (type) {
> >>> + result = device_create_file(&cdev->device,
> &dev_attr_cdev_type);
> >>> + if (result)
> >>> + goto unregister;
> >>> + }
> >>> +
> >>> + result = device_create_file(&cdev->device, &dev_attr_max_state);
> >>> + if (result)
> >>> + goto unregister;
> >>> +
> >>> + result = device_create_file(&cdev->device, &dev_attr_cur_state);
> >>> + if (result)
> >>> + goto unregister;
> >>> +
> >>> + /* Add 'this' new cdev to the global cdev list */
> >>> + mutex_lock(&thermal_list_lock);
> >>> + list_add(&cdev->node, &thermal_cdev_list);
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +
> >>> + /* Update binding information for 'this' new cdev */
> >>> + bind_cdev(cdev);
> >>> +
> >>> + return cdev;
> >>> +
> >>> +unregister:
> >>> + release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
> >>> + device_unregister(&cdev->device);
> >>> + return ERR_PTR(result);
> >>> +}
> >>> +EXPORT_SYMBOL(thermal_cooling_device_register);
> >>> +
> >>> +/**
> >>> + * thermal_cooling_device_unregister - removes the registered
> thermal cooling device
> >>> + * @cdev: the thermal cooling device to remove.
> >>> + *
> >>> + * thermal_cooling_device_unregister() must be called when the
> device is no
> >>> + * longer needed.
> >>> + */
> >>> +void thermal_cooling_device_unregister(struct
> thermal_cooling_device *cdev)
> >>> +{
> >>> + int i;
> >>> + const struct thermal_zone_params *tzp;
> >>> + struct thermal_zone_device *tz;
> >>> + struct thermal_cooling_device *pos = NULL;
> >>> +
> >>> + if (!cdev)
> >>> + return;
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> + list_for_each_entry(pos, &thermal_cdev_list, node)
> >>> + if (pos == cdev)
> >>> + break;
> >>> + if (pos != cdev) {
> >>> + /* thermal cooling device not found */
> >>> + mutex_unlock(&thermal_list_lock);
> >>> + return;
> >>> + }
> >>> + list_del(&cdev->node);
> >>> +
> >>> + /* Unbind all thermal zones associated with 'this' cdev */
> >>> + list_for_each_entry(tz, &thermal_tz_list, node) {
> >>> + if (tz->ops->unbind) {
> >>> + tz->ops->unbind(tz, cdev);
> >>> + continue;
> >>> + }
> >>> +
> >>> + if (!tz->tzp || !tz->tzp->tbp)
> >>> + continue;
> >>> +
> >>> + tzp = tz->tzp;
> >>> + for (i = 0; i < tzp->num_tbps; i++) {
> >>> + if (tzp->tbp[i].cdev == cdev) {
> >>> + __unbind(tz, tzp->tbp[i].trip_mask, cdev);
> >>> + tzp->tbp[i].cdev = NULL;
> >>> + }
> >>> + }
> >>> + }
> >>> +
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +
> >>> + if (cdev->type[0])
> >>> + device_remove_file(&cdev->device, &dev_attr_cdev_type);
> >>> + device_remove_file(&cdev->device, &dev_attr_max_state);
> >>> + device_remove_file(&cdev->device, &dev_attr_cur_state);
> >>> +
> >>> + release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
> >>> + device_unregister(&cdev->device);
> >>> + return;
> >>> +}
> >>> +EXPORT_SYMBOL(thermal_cooling_device_unregister);
> >>> +
> >>> +void thermal_cdev_update(struct thermal_cooling_device *cdev)
> >>> +{
> >>> + struct thermal_instance *instance;
> >>> + unsigned long target = 0;
> >>> +
> >>> + /* cooling device is updated*/
> >>> + if (cdev->updated)
> >>> + return;
> >>> +
> >>> + mutex_lock(&cdev->lock);
> >>> + /* Make sure cdev enters the deepest cooling state */
> >>> + list_for_each_entry(instance, &cdev->thermal_instances,
> cdev_node) {
> >>> + if (instance->target == THERMAL_NO_TARGET)
> >>> + continue;
> >>> + if (instance->target > target)
> >>> + target = instance->target;
> >>> + }
> >>> + mutex_unlock(&cdev->lock);
> >>> + cdev->ops->set_cur_state(cdev, target);
> >>> + cdev->updated = true;
> >>> +}
> >>> +EXPORT_SYMBOL(thermal_cdev_update);
> >>> +
> >>> +/**
> >>> + * notify_thermal_framework - Sensor drivers use this API to notify
> framework
> >>> + * @tz: thermal zone device
> >>> + * @trip: indicates which trip point has been crossed
> >>> + *
> >>> + * This function handles the trip events from sensor drivers. It starts
> >>> + * throttling the cooling devices according to the policy configured.
> >>> + * For CRITICAL and HOT trip points, this notifies the respective drivers,
> >>> + * and does actual throttling for other trip points i.e ACTIVE and
> PASSIVE.
> >>> + * The throttling policy is based on the configured platform data; if no
> >>> + * platform data is provided, this uses the step_wise throttling policy.
> >>> + */
> >>> +void notify_thermal_framework(struct thermal_zone_device *tz, int
> trip)
> >>> +{
> >>> + handle_thermal_trip(tz, trip);
> >>> +}
> >>> +EXPORT_SYMBOL(notify_thermal_framework);
> >>> +
> >>> +/**
> >>> + * create_trip_attrs - create attributes for trip points
> >>> + * @tz: the thermal zone device
> >>> + * @mask: Writeable trip point bitmap.
> >>> + */
> >>> +static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
> >>> +{
> >>> + int indx;
> >>> + int size = sizeof(struct thermal_attr) * tz->trips;
> >>> +
> >>> + tz->trip_type_attrs = kzalloc(size, GFP_KERNEL);
> >>> + if (!tz->trip_type_attrs)
> >>> + return -ENOMEM;
> >>> +
> >>> + tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL);
> >>> + if (!tz->trip_temp_attrs) {
> >>> + kfree(tz->trip_type_attrs);
> >>> + return -ENOMEM;
> >>> + }
> >>> +
> >>> + if (tz->ops->get_trip_hyst) {
> >>> + tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL);
> >>> + if (!tz->trip_hyst_attrs) {
> >>> + kfree(tz->trip_type_attrs);
> >>> + kfree(tz->trip_temp_attrs);
> >>> + return -ENOMEM;
> >>> + }
> >>> + }
> >>> +
> >>> +
> >>> + for (indx = 0; indx < tz->trips; indx++) {
> >>> + /* create trip type attribute */
> >>> + snprintf(tz->trip_type_attrs[indx].name,
> THERMAL_NAME_LENGTH,
> >>> + "trip_point_%d_type", indx);
> >>> +
> >>> + sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr);
> >>> + tz->trip_type_attrs[indx].attr.attr.name =
> >>> + tz-
> >trip_type_attrs[indx].name;
> >>> + tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO;
> >>> + tz->trip_type_attrs[indx].attr.show = trip_point_type_show;
> >>> +
> >>> + device_create_file(&tz->device,
> >>> + &tz->trip_type_attrs[indx].attr);
> >>> +
> >>> + /* create trip temp attribute */
> >>> + snprintf(tz->trip_temp_attrs[indx].name,
> THERMAL_NAME_LENGTH,
> >>> + "trip_point_%d_temp", indx);
> >>> +
> >>> + sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr);
> >>> + tz->trip_temp_attrs[indx].attr.attr.name =
> >>> + tz-
> >trip_temp_attrs[indx].name;
> >>> + tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO;
> >>> + tz->trip_temp_attrs[indx].attr.show =
> trip_point_temp_show;
> >>> + if (mask & (1 << indx)) {
> >>> + tz->trip_temp_attrs[indx].attr.attr.mode |=
> S_IWUSR;
> >>> + tz->trip_temp_attrs[indx].attr.store =
> >>> +
> trip_point_temp_store;
> >>> + }
> >>> +
> >>> + device_create_file(&tz->device,
> >>> + &tz->trip_temp_attrs[indx].attr);
> >>> +
> >>> + /* create Optional trip hyst attribute */
> >>> + if (!tz->ops->get_trip_hyst)
> >>> + continue;
> >>> + snprintf(tz->trip_hyst_attrs[indx].name,
> THERMAL_NAME_LENGTH,
> >>> + "trip_point_%d_hyst", indx);
> >>> +
> >>> + sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr);
> >>> + tz->trip_hyst_attrs[indx].attr.attr.name =
> >>> + tz->trip_hyst_attrs[indx].name;
> >>> + tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO;
> >>> + tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show;
> >>> + if (tz->ops->set_trip_hyst) {
> >>> + tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR;
> >>> + tz->trip_hyst_attrs[indx].attr.store =
> >>> + trip_point_hyst_store;
> >>> + }
> >>> +
> >>> + device_create_file(&tz->device,
> >>> + &tz->trip_hyst_attrs[indx].attr);
> >>> + }
> >>> + return 0;
> >>> +}
> >>> +
> >>> +static void remove_trip_attrs(struct thermal_zone_device *tz)
> >>> +{
> >>> + int indx;
> >>> +
> >>> + for (indx = 0; indx < tz->trips; indx++) {
> >>> + device_remove_file(&tz->device,
> >>> + &tz->trip_type_attrs[indx].attr);
> >>> + device_remove_file(&tz->device,
> >>> + &tz->trip_temp_attrs[indx].attr);
> >>> + if (tz->ops->get_trip_hyst)
> >>> + device_remove_file(&tz->device,
> >>> + &tz->trip_hyst_attrs[indx].attr);
> >>> + }
> >>> + kfree(tz->trip_type_attrs);
> >>> + kfree(tz->trip_temp_attrs);
> >>> + kfree(tz->trip_hyst_attrs);
> >>> +}
> >>> +
> >>> +/**
> >>> + * thermal_zone_device_register - register a new thermal zone device
> >>> + * @type: the thermal zone device type
> >>> + * @trips: the number of trip points the thermal zone support
> >>> + * @mask: a bit string indicating the writeablility of trip points
> >>> + * @devdata: private device data
> >>> + * @ops: standard thermal zone device callbacks
> >>> + * @tzp: thermal zone platform parameters
> >>> + * @passive_delay: number of milliseconds to wait between polls when
> >>> + * performing passive cooling
> >>> + * @polling_delay: number of milliseconds to wait between polls when
> checking
> >>> + * whether trip points have been crossed (0 for interrupt
> >>> + * driven systems)
> >>> + *
> >>> + * thermal_zone_device_unregister() must be called when the device
> is no
> >>> + * longer needed. The passive cooling depends on the .get_trend()
> return value.
> >>> + */
> >>> +struct thermal_zone_device *thermal_zone_device_register(const
> char *type,
> >>> + int trips, int mask, void *devdata,
> >>> + const struct thermal_zone_device_ops *ops,
> >>> + const struct thermal_zone_params *tzp,
> >>> + int passive_delay, int polling_delay)
> >>> +{
> >>> + struct thermal_zone_device *tz;
> >>> + enum thermal_trip_type trip_type;
> >>> + int result;
> >>> + int count;
> >>> + int passive = 0;
> >>> +
> >>> + if (type && strlen(type) >= THERMAL_NAME_LENGTH)
> >>> + return ERR_PTR(-EINVAL);
> >>> +
> >>> + if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips)
> >>> + return ERR_PTR(-EINVAL);
> >>> +
> >>> + if (!ops || !ops->get_temp)
> >>> + return ERR_PTR(-EINVAL);
> >>> +
> >>> + if (trips > 0 && !ops->get_trip_type)
> >>> + return ERR_PTR(-EINVAL);
> >>> +
> >>> + tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
> >>> + if (!tz)
> >>> + return ERR_PTR(-ENOMEM);
> >>> +
> >>> + INIT_LIST_HEAD(&tz->thermal_instances);
> >>> + idr_init(&tz->idr);
> >>> + mutex_init(&tz->lock);
> >>> + result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
> >>> + if (result) {
> >>> + kfree(tz);
> >>> + return ERR_PTR(result);
> >>> + }
> >>> +
> >>> + strcpy(tz->type, type ? : "");
> >>> + tz->ops = ops;
> >>> + tz->tzp = tzp;
> >>> + tz->device.class = &thermal_class;
> >>> + tz->devdata = devdata;
> >>> + tz->trips = trips;
> >>> + tz->passive_delay = passive_delay;
> >>> + tz->polling_delay = polling_delay;
> >>> +
> >>> + dev_set_name(&tz->device, "thermal_zone%d", tz->id);
> >>> + result = device_register(&tz->device);
> >>> + if (result) {
> >>> + release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
> >>> + kfree(tz);
> >>> + return ERR_PTR(result);
> >>> + }
> >>> +
> >>> + /* sys I/F */
> >>> + if (type) {
> >>> + result = device_create_file(&tz->device, &dev_attr_type);
> >>> + if (result)
> >>> + goto unregister;
> >>> + }
> >>> +
> >>> + result = device_create_file(&tz->device, &dev_attr_temp);
> >>> + if (result)
> >>> + goto unregister;
> >>> +
> >>> + if (ops->get_mode) {
> >>> + result = device_create_file(&tz->device, &dev_attr_mode);
> >>> + if (result)
> >>> + goto unregister;
> >>> + }
> >>> +
> >>> + result = create_trip_attrs(tz, mask);
> >>> + if (result)
> >>> + goto unregister;
> >>> +
> >>> + for (count = 0; count < trips; count++) {
> >>> + tz->ops->get_trip_type(tz, count, &trip_type);
> >>> + if (trip_type == THERMAL_TRIP_PASSIVE)
> >>> + passive = 1;
> >>> + }
> >>> +
> >>> + if (!passive) {
> >>> + result = device_create_file(&tz->device, &dev_attr_passive);
> >>> + if (result)
> >>> + goto unregister;
> >>> + }
> >>> +
> >>> +#ifdef CONFIG_THERMAL_EMULATION
> >>> + result = device_create_file(&tz->device, &dev_attr_emul_temp);
> >>> + if (result)
> >>> + goto unregister;
> >>> +#endif
> >>> + /* Create policy attribute */
> >>> + result = device_create_file(&tz->device, &dev_attr_policy);
> >>> + if (result)
> >>> + goto unregister;
> >>> +
> >>> + /* Update 'this' zone's governor information */
> >>> + mutex_lock(&thermal_governor_lock);
> >>> +
> >>> + if (tz->tzp)
> >>> + tz->governor = __find_governor(tz->tzp->governor_name);
> >>> + else
> >>> + tz->governor =
> __find_governor(DEFAULT_THERMAL_GOVERNOR);
> >>> +
> >>> + mutex_unlock(&thermal_governor_lock);
> >>> +
> >>> + result = thermal_add_hwmon_sysfs(tz);
> >>> + if (result)
> >>> + goto unregister;
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> + list_add_tail(&tz->node, &thermal_tz_list);
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +
> >>> + /* Bind cooling devices for this zone */
> >>> + bind_tz(tz);
> >>> +
> >>> + INIT_DELAYED_WORK(&(tz->poll_queue),
> thermal_zone_device_check);
> >>> +
> >>> + thermal_zone_device_update(tz);
> >>> +
> >>> + if (!result)
> >>> + return tz;
> >>> +
> >>> +unregister:
> >>> + release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
> >>> + device_unregister(&tz->device);
> >>> + return ERR_PTR(result);
> >>> +}
> >>> +EXPORT_SYMBOL(thermal_zone_device_register);
> >>> +
> >>> +/**
> >>> + * thermal_device_unregister - removes the registered thermal zone
> device
> >>> + * @tz: the thermal zone device to remove
> >>> + */
> >>> +void thermal_zone_device_unregister(struct thermal_zone_device
> *tz)
> >>> +{
> >>> + int i;
> >>> + const struct thermal_zone_params *tzp;
> >>> + struct thermal_cooling_device *cdev;
> >>> + struct thermal_zone_device *pos = NULL;
> >>> +
> >>> + if (!tz)
> >>> + return;
> >>> +
> >>> + tzp = tz->tzp;
> >>> +
> >>> + mutex_lock(&thermal_list_lock);
> >>> + list_for_each_entry(pos, &thermal_tz_list, node)
> >>> + if (pos == tz)
> >>> + break;
> >>> + if (pos != tz) {
> >>> + /* thermal zone device not found */
> >>> + mutex_unlock(&thermal_list_lock);
> >>> + return;
> >>> + }
> >>> + list_del(&tz->node);
> >>> +
> >>> + /* Unbind all cdevs associated with 'this' thermal zone */
> >>> + list_for_each_entry(cdev, &thermal_cdev_list, node) {
> >>> + if (tz->ops->unbind) {
> >>> + tz->ops->unbind(tz, cdev);
> >>> + continue;
> >>> + }
> >>> +
> >>> + if (!tzp || !tzp->tbp)
> >>> + break;
> >>> +
> >>> + for (i = 0; i < tzp->num_tbps; i++) {
> >>> + if (tzp->tbp[i].cdev == cdev) {
> >>> + __unbind(tz, tzp->tbp[i].trip_mask, cdev);
> >>> + tzp->tbp[i].cdev = NULL;
> >>> + }
> >>> + }
> >>> + }
> >>> +
> >>> + mutex_unlock(&thermal_list_lock);
> >>> +
> >>> + thermal_zone_device_set_polling(tz, 0);
> >>> +
> >>> + if (tz->type[0])
> >>> + device_remove_file(&tz->device, &dev_attr_type);
> >>> + device_remove_file(&tz->device, &dev_attr_temp);
> >>> + if (tz->ops->get_mode)
> >>> + device_remove_file(&tz->device, &dev_attr_mode);
> >>> + device_remove_file(&tz->device, &dev_attr_policy);
> >>> + remove_trip_attrs(tz);
> >>> + tz->governor = NULL;
> >>> +
> >>> + thermal_remove_hwmon_sysfs(tz);
> >>> + release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
> >>> + idr_destroy(&tz->idr);
> >>> + mutex_destroy(&tz->lock);
> >>> + device_unregister(&tz->device);
> >>> + return;
> >>> +}
> >>> +EXPORT_SYMBOL(thermal_zone_device_unregister);
> >>> +
> >>> +#ifdef CONFIG_NET
> >>> +static struct genl_family thermal_event_genl_family = {
> >>> + .id = GENL_ID_GENERATE,
> >>> + .name = THERMAL_GENL_FAMILY_NAME,
> >>> + .version = THERMAL_GENL_VERSION,
> >>> + .maxattr = THERMAL_GENL_ATTR_MAX,
> >>> +};
> >>> +
> >>> +static struct genl_multicast_group thermal_event_mcgrp = {
> >>> + .name = THERMAL_GENL_MCAST_GROUP_NAME,
> >>> +};
> >>> +
> >>> +int thermal_generate_netlink_event(struct thermal_zone_device *tz,
> >>> + enum events event)
> >>> +{
> >>> + struct sk_buff *skb;
> >>> + struct nlattr *attr;
> >>> + struct thermal_genl_event *thermal_event;
> >>> + void *msg_header;
> >>> + int size;
> >>> + int result;
> >>> + static unsigned int thermal_event_seqnum;
> >>> +
> >>> + if (!tz)
> >>> + return -EINVAL;
> >>> +
> >>> + /* allocate memory */
> >>> + size = nla_total_size(sizeof(struct thermal_genl_event)) +
> >>> + nla_total_size(0);
> >>> +
> >>> + skb = genlmsg_new(size, GFP_ATOMIC);
> >>> + if (!skb)
> >>> + return -ENOMEM;
> >>> +
> >>> + /* add the genetlink message header */
> >>> + msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++,
> >>> + &thermal_event_genl_family, 0,
> >>> + THERMAL_GENL_CMD_EVENT);
> >>> + if (!msg_header) {
> >>> + nlmsg_free(skb);
> >>> + return -ENOMEM;
> >>> + }
> >>> +
> >>> + /* fill the data */
> >>> + attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT,
> >>> + sizeof(struct thermal_genl_event));
> >>> +
> >>> + if (!attr) {
> >>> + nlmsg_free(skb);
> >>> + return -EINVAL;
> >>> + }
> >>> +
> >>> + thermal_event = nla_data(attr);
> >>> + if (!thermal_event) {
> >>> + nlmsg_free(skb);
> >>> + return -EINVAL;
> >>> + }
> >>> +
> >>> + memset(thermal_event, 0, sizeof(struct thermal_genl_event));
> >>> +
> >>> + thermal_event->orig = tz->id;
> >>> + thermal_event->event = event;
> >>> +
> >>> + /* send multicast genetlink message */
> >>> + result = genlmsg_end(skb, msg_header);
> >>> + if (result < 0) {
> >>> + nlmsg_free(skb);
> >>> + return result;
> >>> + }
> >>> +
> >>> + result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id,
> GFP_ATOMIC);
> >>> + if (result)
> >>> + dev_err(&tz->device, "Failed to send netlink event:%d",
> result);
> >>> +
> >>> + return result;
> >>> +}
> >>> +EXPORT_SYMBOL(thermal_generate_netlink_event);
> >>> +
> >>> +static int genetlink_init(void)
> >>> +{
> >>> + int result;
> >>> +
> >>> + result = genl_register_family(&thermal_event_genl_family);
> >>> + if (result)
> >>> + return result;
> >>> +
> >>> + result = genl_register_mc_group(&thermal_event_genl_family,
> >>> + &thermal_event_mcgrp);
> >>> + if (result)
> >>> + genl_unregister_family(&thermal_event_genl_family);
> >>> + return result;
> >>> +}
> >>> +
> >>> +static void genetlink_exit(void)
> >>> +{
> >>> + genl_unregister_family(&thermal_event_genl_family);
> >>> +}
> >>> +#else /* !CONFIG_NET */
> >>> +static inline int genetlink_init(void) { return 0; }
> >>> +static inline void genetlink_exit(void) {}
> >>> +#endif /* !CONFIG_NET */
> >>> +
> >>> +static int __init thermal_init(void)
> >>> +{
> >>> + int result = 0;
> >>> +
> >>> + result = class_register(&thermal_class);
> >>> + if (result) {
> >>> + idr_destroy(&thermal_tz_idr);
> >>> + idr_destroy(&thermal_cdev_idr);
> >>> + mutex_destroy(&thermal_idr_lock);
> >>> + mutex_destroy(&thermal_list_lock);
> >>> + return result;
> >>> + }
> >>> + result = genetlink_init();
> >>> + return result;
> >>> +}
> >>> +
> >>> +static void __exit thermal_exit(void)
> >>> +{
> >>> + class_unregister(&thermal_class);
> >>> + idr_destroy(&thermal_tz_idr);
> >>> + idr_destroy(&thermal_cdev_idr);
> >>> + mutex_destroy(&thermal_idr_lock);
> >>> + mutex_destroy(&thermal_list_lock);
> >>> + genetlink_exit();
> >>> +}
> >>> +
> >>> +fs_initcall(thermal_init);
> >>> +module_exit(thermal_exit);
> >>> diff --git a/drivers/thermal/thermal_sys.c
> b/drivers/thermal/thermal_sys.c
> >>> deleted file mode 100644
> >>> index 5b7863a..0000000
> >>> --- a/drivers/thermal/thermal_sys.c
> >>> +++ /dev/null
> >>> @@ -1,1888 +0,0 @@
> >>> -/*
> >>> - * thermal.c - Generic Thermal Management Sysfs support.
> >>> - *
> >>> - * Copyright (C) 2008 Intel Corp
> >>> - * Copyright (C) 2008 Zhang Rui <rui.zhang@xxxxxxxxx>
> >>> - * Copyright (C) 2008 Sujith Thomas <sujith.thomas@xxxxxxxxx>
> >>> - *
> >>> - *
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~~~~~~~~~~~~~~~
> >>> - *
> >>> - * This program is free software; you can redistribute it and/or modify
> >>> - * it under the terms of the GNU General Public License as published by
> >>> - * the Free Software Foundation; version 2 of the License.
> >>> - *
> >>> - * This program is distributed in the hope that it will be useful, but
> >>> - * WITHOUT ANY WARRANTY; without even the implied warranty of
> >>> - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See
> the GNU
> >>> - * General Public License for more details.
> >>> - *
> >>> - * You should have received a copy of the GNU General Public License
> along
> >>> - * with this program; if not, write to the Free Software Foundation, Inc.,
> >>> - * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
> >>> - *
> >>> - *
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> ~~~~~~~~~~~~~~~~
> >>> - */
> >>> -
> >>> -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
> >>> -
> >>> -#include <linux/module.h>
> >>> -#include <linux/device.h>
> >>> -#include <linux/err.h>
> >>> -#include <linux/slab.h>
> >>> -#include <linux/kdev_t.h>
> >>> -#include <linux/idr.h>
> >>> -#include <linux/thermal.h>
> >>> -#include <linux/reboot.h>
> >>> -#include <net/netlink.h>
> >>> -#include <net/genetlink.h>
> >>> -
> >>> -#include "thermal_core.h"
> >>> -
> >>> -MODULE_AUTHOR("Zhang Rui");
> >>> -MODULE_DESCRIPTION("Generic thermal management sysfs
> support");
> >>> -MODULE_LICENSE("GPL");
> >>> -
> >>> -static DEFINE_IDR(thermal_tz_idr);
> >>> -static DEFINE_IDR(thermal_cdev_idr);
> >>> -static DEFINE_MUTEX(thermal_idr_lock);
> >>> -
> >>> -static LIST_HEAD(thermal_tz_list);
> >>> -static LIST_HEAD(thermal_cdev_list);
> >>> -static LIST_HEAD(thermal_governor_list);
> >>> -
> >>> -static DEFINE_MUTEX(thermal_list_lock);
> >>> -static DEFINE_MUTEX(thermal_governor_lock);
> >>> -
> >>> -static struct thermal_governor *__find_governor(const char *name)
> >>> -{
> >>> - struct thermal_governor *pos;
> >>> -
> >>> - list_for_each_entry(pos, &thermal_governor_list, governor_list)
> >>> - if (!strnicmp(name, pos->name, THERMAL_NAME_LENGTH))
> >>> - return pos;
> >>> -
> >>> - return NULL;
> >>> -}
> >>> -
> >>> -int thermal_register_governor(struct thermal_governor *governor)
> >>> -{
> >>> - int err;
> >>> - const char *name;
> >>> - struct thermal_zone_device *pos;
> >>> -
> >>> - if (!governor)
> >>> - return -EINVAL;
> >>> -
> >>> - mutex_lock(&thermal_governor_lock);
> >>> -
> >>> - err = -EBUSY;
> >>> - if (__find_governor(governor->name) == NULL) {
> >>> - err = 0;
> >>> - list_add(&governor->governor_list,
> &thermal_governor_list);
> >>> - }
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> -
> >>> - list_for_each_entry(pos, &thermal_tz_list, node) {
> >>> - if (pos->governor)
> >>> - continue;
> >>> - if (pos->tzp)
> >>> - name = pos->tzp->governor_name;
> >>> - else
> >>> - name = DEFAULT_THERMAL_GOVERNOR;
> >>> - if (!strnicmp(name, governor->name,
> THERMAL_NAME_LENGTH))
> >>> - pos->governor = governor;
> >>> - }
> >>> -
> >>> - mutex_unlock(&thermal_list_lock);
> >>> - mutex_unlock(&thermal_governor_lock);
> >>> -
> >>> - return err;
> >>> -}
> >>> -EXPORT_SYMBOL_GPL(thermal_register_governor);
> >>> -
> >>> -void thermal_unregister_governor(struct thermal_governor
> *governor)
> >>> -{
> >>> - struct thermal_zone_device *pos;
> >>> -
> >>> - if (!governor)
> >>> - return;
> >>> -
> >>> - mutex_lock(&thermal_governor_lock);
> >>> -
> >>> - if (__find_governor(governor->name) == NULL)
> >>> - goto exit;
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> -
> >>> - list_for_each_entry(pos, &thermal_tz_list, node) {
> >>> - if (!strnicmp(pos->governor->name, governor->name,
> >>> - THERMAL_NAME_LENGTH))
> >>> - pos->governor = NULL;
> >>> - }
> >>> -
> >>> - mutex_unlock(&thermal_list_lock);
> >>> - list_del(&governor->governor_list);
> >>> -exit:
> >>> - mutex_unlock(&thermal_governor_lock);
> >>> - return;
> >>> -}
> >>> -EXPORT_SYMBOL_GPL(thermal_unregister_governor);
> >>> -
> >>> -static int get_idr(struct idr *idr, struct mutex *lock, int *id)
> >>> -{
> >>> - int ret;
> >>> -
> >>> - if (lock)
> >>> - mutex_lock(lock);
> >>> - ret = idr_alloc(idr, NULL, 0, 0, GFP_KERNEL);
> >>> - if (lock)
> >>> - mutex_unlock(lock);
> >>> - if (unlikely(ret < 0))
> >>> - return ret;
> >>> - *id = ret;
> >>> - return 0;
> >>> -}
> >>> -
> >>> -static void release_idr(struct idr *idr, struct mutex *lock, int id)
> >>> -{
> >>> - if (lock)
> >>> - mutex_lock(lock);
> >>> - idr_remove(idr, id);
> >>> - if (lock)
> >>> - mutex_unlock(lock);
> >>> -}
> >>> -
> >>> -int get_tz_trend(struct thermal_zone_device *tz, int trip)
> >>> -{
> >>> - enum thermal_trend trend;
> >>> -
> >>> - if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) {
> >>> - if (tz->temperature > tz->last_temperature)
> >>> - trend = THERMAL_TREND_RAISING;
> >>> - else if (tz->temperature < tz->last_temperature)
> >>> - trend = THERMAL_TREND_DROPPING;
> >>> - else
> >>> - trend = THERMAL_TREND_STABLE;
> >>> - }
> >>> -
> >>> - return trend;
> >>> -}
> >>> -EXPORT_SYMBOL(get_tz_trend);
> >>> -
> >>> -struct thermal_instance *get_thermal_instance(struct
> thermal_zone_device *tz,
> >>> - struct thermal_cooling_device *cdev, int trip)
> >>> -{
> >>> - struct thermal_instance *pos = NULL;
> >>> - struct thermal_instance *target_instance = NULL;
> >>> -
> >>> - mutex_lock(&tz->lock);
> >>> - mutex_lock(&cdev->lock);
> >>> -
> >>> - list_for_each_entry(pos, &tz->thermal_instances, tz_node) {
> >>> - if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
> >>> - target_instance = pos;
> >>> - break;
> >>> - }
> >>> - }
> >>> -
> >>> - mutex_unlock(&cdev->lock);
> >>> - mutex_unlock(&tz->lock);
> >>> -
> >>> - return target_instance;
> >>> -}
> >>> -EXPORT_SYMBOL(get_thermal_instance);
> >>> -
> >>> -static void print_bind_err_msg(struct thermal_zone_device *tz,
> >>> - struct thermal_cooling_device *cdev, int ret)
> >>> -{
> >>> - dev_err(&tz->device, "binding zone %s with cdev %s failed:%d\n",
> >>> - tz->type, cdev->type, ret);
> >>> -}
> >>> -
> >>> -static void __bind(struct thermal_zone_device *tz, int mask,
> >>> - struct thermal_cooling_device *cdev)
> >>> -{
> >>> - int i, ret;
> >>> -
> >>> - for (i = 0; i < tz->trips; i++) {
> >>> - if (mask & (1 << i)) {
> >>> - ret = thermal_zone_bind_cooling_device(tz, i, cdev,
> >>> - THERMAL_NO_LIMIT,
> THERMAL_NO_LIMIT);
> >>> - if (ret)
> >>> - print_bind_err_msg(tz, cdev, ret);
> >>> - }
> >>> - }
> >>> -}
> >>> -
> >>> -static void __unbind(struct thermal_zone_device *tz, int mask,
> >>> - struct thermal_cooling_device *cdev)
> >>> -{
> >>> - int i;
> >>> -
> >>> - for (i = 0; i < tz->trips; i++)
> >>> - if (mask & (1 << i))
> >>> - thermal_zone_unbind_cooling_device(tz, i, cdev);
> >>> -}
> >>> -
> >>> -static void bind_cdev(struct thermal_cooling_device *cdev)
> >>> -{
> >>> - int i, ret;
> >>> - const struct thermal_zone_params *tzp;
> >>> - struct thermal_zone_device *pos = NULL;
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> -
> >>> - list_for_each_entry(pos, &thermal_tz_list, node) {
> >>> - if (!pos->tzp && !pos->ops->bind)
> >>> - continue;
> >>> -
> >>> - if (!pos->tzp && pos->ops->bind) {
> >>> - ret = pos->ops->bind(pos, cdev);
> >>> - if (ret)
> >>> - print_bind_err_msg(pos, cdev, ret);
> >>> - }
> >>> -
> >>> - tzp = pos->tzp;
> >>> - if (!tzp || !tzp->tbp)
> >>> - continue;
> >>> -
> >>> - for (i = 0; i < tzp->num_tbps; i++) {
> >>> - if (tzp->tbp[i].cdev || !tzp->tbp[i].match)
> >>> - continue;
> >>> - if (tzp->tbp[i].match(pos, cdev))
> >>> - continue;
> >>> - tzp->tbp[i].cdev = cdev;
> >>> - __bind(pos, tzp->tbp[i].trip_mask, cdev);
> >>> - }
> >>> - }
> >>> -
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -}
> >>> -
> >>> -static void bind_tz(struct thermal_zone_device *tz)
> >>> -{
> >>> - int i, ret;
> >>> - struct thermal_cooling_device *pos = NULL;
> >>> - const struct thermal_zone_params *tzp = tz->tzp;
> >>> -
> >>> - if (!tzp && !tz->ops->bind)
> >>> - return;
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> -
> >>> - /* If there is no platform data, try to use ops->bind */
> >>> - if (!tzp && tz->ops->bind) {
> >>> - list_for_each_entry(pos, &thermal_cdev_list, node) {
> >>> - ret = tz->ops->bind(tz, pos);
> >>> - if (ret)
> >>> - print_bind_err_msg(tz, pos, ret);
> >>> - }
> >>> - goto exit;
> >>> - }
> >>> -
> >>> - if (!tzp || !tzp->tbp)
> >>> - goto exit;
> >>> -
> >>> - list_for_each_entry(pos, &thermal_cdev_list, node) {
> >>> - for (i = 0; i < tzp->num_tbps; i++) {
> >>> - if (tzp->tbp[i].cdev || !tzp->tbp[i].match)
> >>> - continue;
> >>> - if (tzp->tbp[i].match(tz, pos))
> >>> - continue;
> >>> - tzp->tbp[i].cdev = pos;
> >>> - __bind(tz, tzp->tbp[i].trip_mask, pos);
> >>> - }
> >>> - }
> >>> -exit:
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -}
> >>> -
> >>> -static void thermal_zone_device_set_polling(struct
> thermal_zone_device *tz,
> >>> - int delay)
> >>> -{
> >>> - if (delay > 1000)
> >>> - mod_delayed_work(system_freezable_wq, &tz-
> >poll_queue,
> >>> - round_jiffies(msecs_to_jiffies(delay)));
> >>> - else if (delay)
> >>> - mod_delayed_work(system_freezable_wq, &tz-
> >poll_queue,
> >>> - msecs_to_jiffies(delay));
> >>> - else
> >>> - cancel_delayed_work(&tz->poll_queue);
> >>> -}
> >>> -
> >>> -static void monitor_thermal_zone(struct thermal_zone_device *tz)
> >>> -{
> >>> - mutex_lock(&tz->lock);
> >>> -
> >>> - if (tz->passive)
> >>> - thermal_zone_device_set_polling(tz, tz->passive_delay);
> >>> - else if (tz->polling_delay)
> >>> - thermal_zone_device_set_polling(tz, tz->polling_delay);
> >>> - else
> >>> - thermal_zone_device_set_polling(tz, 0);
> >>> -
> >>> - mutex_unlock(&tz->lock);
> >>> -}
> >>> -
> >>> -static void handle_non_critical_trips(struct thermal_zone_device *tz,
> >>> - int trip, enum thermal_trip_type trip_type)
> >>> -{
> >>> - if (tz->governor)
> >>> - tz->governor->throttle(tz, trip);
> >>> -}
> >>> -
> >>> -static void handle_critical_trips(struct thermal_zone_device *tz,
> >>> - int trip, enum thermal_trip_type trip_type)
> >>> -{
> >>> - long trip_temp;
> >>> -
> >>> - tz->ops->get_trip_temp(tz, trip, &trip_temp);
> >>> -
> >>> - /* If we have not crossed the trip_temp, we do not care. */
> >>> - if (tz->temperature < trip_temp)
> >>> - return;
> >>> -
> >>> - if (tz->ops->notify)
> >>> - tz->ops->notify(tz, trip, trip_type);
> >>> -
> >>> - if (trip_type == THERMAL_TRIP_CRITICAL) {
> >>> - dev_emerg(&tz->device,
> >>> - "critical temperature reached(%d C),shutting
> down\n",
> >>> - tz->temperature / 1000);
> >>> - orderly_poweroff(true);
> >>> - }
> >>> -}
> >>> -
> >>> -static void handle_thermal_trip(struct thermal_zone_device *tz, int
> trip)
> >>> -{
> >>> - enum thermal_trip_type type;
> >>> -
> >>> - tz->ops->get_trip_type(tz, trip, &type);
> >>> -
> >>> - if (type == THERMAL_TRIP_CRITICAL || type ==
> THERMAL_TRIP_HOT)
> >>> - handle_critical_trips(tz, trip, type);
> >>> - else
> >>> - handle_non_critical_trips(tz, trip, type);
> >>> - /*
> >>> - * Alright, we handled this trip successfully.
> >>> - * So, start monitoring again.
> >>> - */
> >>> - monitor_thermal_zone(tz);
> >>> -}
> >>> -
> >>> -static int thermal_zone_get_temp(struct thermal_zone_device *tz,
> >>> - unsigned long *temp)
> >>> -{
> >>> - int ret = 0;
> >>> -#ifdef CONFIG_THERMAL_EMULATION
> >>> - int count;
> >>> - unsigned long crit_temp = -1UL;
> >>> - enum thermal_trip_type type;
> >>> -#endif
> >>> -
> >>> - mutex_lock(&tz->lock);
> >>> -
> >>> - ret = tz->ops->get_temp(tz, temp);
> >>> -#ifdef CONFIG_THERMAL_EMULATION
> >>> - if (!tz->emul_temperature)
> >>> - goto skip_emul;
> >>> -
> >>> - for (count = 0; count < tz->trips; count++) {
> >>> - ret = tz->ops->get_trip_type(tz, count, &type);
> >>> - if (!ret && type == THERMAL_TRIP_CRITICAL) {
> >>> - ret = tz->ops->get_trip_temp(tz, count, &crit_temp);
> >>> - break;
> >>> - }
> >>> - }
> >>> -
> >>> - if (ret)
> >>> - goto skip_emul;
> >>> -
> >>> - if (*temp < crit_temp)
> >>> - *temp = tz->emul_temperature;
> >>> -skip_emul:
> >>> -#endif
> >>> - mutex_unlock(&tz->lock);
> >>> - return ret;
> >>> -}
> >>> -
> >>> -static void update_temperature(struct thermal_zone_device *tz)
> >>> -{
> >>> - long temp;
> >>> - int ret;
> >>> -
> >>> - ret = thermal_zone_get_temp(tz, &temp);
> >>> - if (ret) {
> >>> - dev_warn(&tz->device, "failed to read out thermal zone
> %d\n",
> >>> - tz->id);
> >>> - return;
> >>> - }
> >>> -
> >>> - mutex_lock(&tz->lock);
> >>> - tz->last_temperature = tz->temperature;
> >>> - tz->temperature = temp;
> >>> - mutex_unlock(&tz->lock);
> >>> -}
> >>> -
> >>> -void thermal_zone_device_update(struct thermal_zone_device *tz)
> >>> -{
> >>> - int count;
> >>> -
> >>> - update_temperature(tz);
> >>> -
> >>> - for (count = 0; count < tz->trips; count++)
> >>> - handle_thermal_trip(tz, count);
> >>> -}
> >>> -EXPORT_SYMBOL(thermal_zone_device_update);
> >>> -
> >>> -static void thermal_zone_device_check(struct work_struct *work)
> >>> -{
> >>> - struct thermal_zone_device *tz = container_of(work, struct
> >>> - thermal_zone_device,
> >>> - poll_queue.work);
> >>> - thermal_zone_device_update(tz);
> >>> -}
> >>> -
> >>> -/* sys I/F for thermal zone */
> >>> -
> >>> -#define to_thermal_zone(_dev) \
> >>> - container_of(_dev, struct thermal_zone_device, device)
> >>> -
> >>> -static ssize_t
> >>> -type_show(struct device *dev, struct device_attribute *attr, char *buf)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> -
> >>> - return sprintf(buf, "%s\n", tz->type);
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -temp_show(struct device *dev, struct device_attribute *attr, char
> *buf)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - long temperature;
> >>> - int ret;
> >>> -
> >>> - ret = thermal_zone_get_temp(tz, &temperature);
> >>> -
> >>> - if (ret)
> >>> - return ret;
> >>> -
> >>> - return sprintf(buf, "%ld\n", temperature);
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -mode_show(struct device *dev, struct device_attribute *attr, char
> *buf)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - enum thermal_device_mode mode;
> >>> - int result;
> >>> -
> >>> - if (!tz->ops->get_mode)
> >>> - return -EPERM;
> >>> -
> >>> - result = tz->ops->get_mode(tz, &mode);
> >>> - if (result)
> >>> - return result;
> >>> -
> >>> - return sprintf(buf, "%s\n", mode == THERMAL_DEVICE_ENABLED ?
> "enabled"
> >>> - : "disabled");
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -mode_store(struct device *dev, struct device_attribute *attr,
> >>> - const char *buf, size_t count)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - int result;
> >>> -
> >>> - if (!tz->ops->set_mode)
> >>> - return -EPERM;
> >>> -
> >>> - if (!strncmp(buf, "enabled", sizeof("enabled") - 1))
> >>> - result = tz->ops->set_mode(tz,
> THERMAL_DEVICE_ENABLED);
> >>> - else if (!strncmp(buf, "disabled", sizeof("disabled") - 1))
> >>> - result = tz->ops->set_mode(tz,
> THERMAL_DEVICE_DISABLED);
> >>> - else
> >>> - result = -EINVAL;
> >>> -
> >>> - if (result)
> >>> - return result;
> >>> -
> >>> - return count;
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -trip_point_type_show(struct device *dev, struct device_attribute
> *attr,
> >>> - char *buf)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - enum thermal_trip_type type;
> >>> - int trip, result;
> >>> -
> >>> - if (!tz->ops->get_trip_type)
> >>> - return -EPERM;
> >>> -
> >>> - if (!sscanf(attr->attr.name, "trip_point_%d_type", &trip))
> >>> - return -EINVAL;
> >>> -
> >>> - result = tz->ops->get_trip_type(tz, trip, &type);
> >>> - if (result)
> >>> - return result;
> >>> -
> >>> - switch (type) {
> >>> - case THERMAL_TRIP_CRITICAL:
> >>> - return sprintf(buf, "critical\n");
> >>> - case THERMAL_TRIP_HOT:
> >>> - return sprintf(buf, "hot\n");
> >>> - case THERMAL_TRIP_PASSIVE:
> >>> - return sprintf(buf, "passive\n");
> >>> - case THERMAL_TRIP_ACTIVE:
> >>> - return sprintf(buf, "active\n");
> >>> - default:
> >>> - return sprintf(buf, "unknown\n");
> >>> - }
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -trip_point_temp_store(struct device *dev, struct device_attribute
> *attr,
> >>> - const char *buf, size_t count)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - int trip, ret;
> >>> - unsigned long temperature;
> >>> -
> >>> - if (!tz->ops->set_trip_temp)
> >>> - return -EPERM;
> >>> -
> >>> - if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
> >>> - return -EINVAL;
> >>> -
> >>> - if (kstrtoul(buf, 10, &temperature))
> >>> - return -EINVAL;
> >>> -
> >>> - ret = tz->ops->set_trip_temp(tz, trip, temperature);
> >>> -
> >>> - return ret ? ret : count;
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -trip_point_temp_show(struct device *dev, struct device_attribute
> *attr,
> >>> - char *buf)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - int trip, ret;
> >>> - long temperature;
> >>> -
> >>> - if (!tz->ops->get_trip_temp)
> >>> - return -EPERM;
> >>> -
> >>> - if (!sscanf(attr->attr.name, "trip_point_%d_temp", &trip))
> >>> - return -EINVAL;
> >>> -
> >>> - ret = tz->ops->get_trip_temp(tz, trip, &temperature);
> >>> -
> >>> - if (ret)
> >>> - return ret;
> >>> -
> >>> - return sprintf(buf, "%ld\n", temperature);
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -trip_point_hyst_store(struct device *dev, struct device_attribute *attr,
> >>> - const char *buf, size_t count)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - int trip, ret;
> >>> - unsigned long temperature;
> >>> -
> >>> - if (!tz->ops->set_trip_hyst)
> >>> - return -EPERM;
> >>> -
> >>> - if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
> >>> - return -EINVAL;
> >>> -
> >>> - if (kstrtoul(buf, 10, &temperature))
> >>> - return -EINVAL;
> >>> -
> >>> - /*
> >>> - * We are not doing any check on the 'temperature' value
> >>> - * here. The driver implementing 'set_trip_hyst' has to
> >>> - * take care of this.
> >>> - */
> >>> - ret = tz->ops->set_trip_hyst(tz, trip, temperature);
> >>> -
> >>> - return ret ? ret : count;
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -trip_point_hyst_show(struct device *dev, struct device_attribute *attr,
> >>> - char *buf)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - int trip, ret;
> >>> - unsigned long temperature;
> >>> -
> >>> - if (!tz->ops->get_trip_hyst)
> >>> - return -EPERM;
> >>> -
> >>> - if (!sscanf(attr->attr.name, "trip_point_%d_hyst", &trip))
> >>> - return -EINVAL;
> >>> -
> >>> - ret = tz->ops->get_trip_hyst(tz, trip, &temperature);
> >>> -
> >>> - return ret ? ret : sprintf(buf, "%ld\n", temperature);
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -passive_store(struct device *dev, struct device_attribute *attr,
> >>> - const char *buf, size_t count)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - struct thermal_cooling_device *cdev = NULL;
> >>> - int state;
> >>> -
> >>> - if (!sscanf(buf, "%d\n", &state))
> >>> - return -EINVAL;
> >>> -
> >>> - /* sanity check: values below 1000 millicelcius don't make sense
> >>> - * and can cause the system to go into a thermal heart attack
> >>> - */
> >>> - if (state && state < 1000)
> >>> - return -EINVAL;
> >>> -
> >>> - if (state && !tz->forced_passive) {
> >>> - mutex_lock(&thermal_list_lock);
> >>> - list_for_each_entry(cdev, &thermal_cdev_list, node) {
> >>> - if (!strncmp("Processor", cdev->type,
> >>> - sizeof("Processor")))
> >>> - thermal_zone_bind_cooling_device(tz,
> >>> - THERMAL_TRIPS_NONE,
> cdev,
> >>> - THERMAL_NO_LIMIT,
> >>> - THERMAL_NO_LIMIT);
> >>> - }
> >>> - mutex_unlock(&thermal_list_lock);
> >>> - if (!tz->passive_delay)
> >>> - tz->passive_delay = 1000;
> >>> - } else if (!state && tz->forced_passive) {
> >>> - mutex_lock(&thermal_list_lock);
> >>> - list_for_each_entry(cdev, &thermal_cdev_list, node) {
> >>> - if (!strncmp("Processor", cdev->type,
> >>> - sizeof("Processor")))
> >>> - thermal_zone_unbind_cooling_device(tz,
> >>> -
> THERMAL_TRIPS_NONE,
> >>> - cdev);
> >>> - }
> >>> - mutex_unlock(&thermal_list_lock);
> >>> - tz->passive_delay = 0;
> >>> - }
> >>> -
> >>> - tz->forced_passive = state;
> >>> -
> >>> - thermal_zone_device_update(tz);
> >>> -
> >>> - return count;
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -passive_show(struct device *dev, struct device_attribute *attr,
> >>> - char *buf)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> -
> >>> - return sprintf(buf, "%d\n", tz->forced_passive);
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -policy_store(struct device *dev, struct device_attribute *attr,
> >>> - const char *buf, size_t count)
> >>> -{
> >>> - int ret = -EINVAL;
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - struct thermal_governor *gov;
> >>> -
> >>> - mutex_lock(&thermal_governor_lock);
> >>> -
> >>> - gov = __find_governor(buf);
> >>> - if (!gov)
> >>> - goto exit;
> >>> -
> >>> - tz->governor = gov;
> >>> - ret = count;
> >>> -
> >>> -exit:
> >>> - mutex_unlock(&thermal_governor_lock);
> >>> - return ret;
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -policy_show(struct device *dev, struct device_attribute *devattr, char
> *buf)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> -
> >>> - return sprintf(buf, "%s\n", tz->governor->name);
> >>> -}
> >>> -
> >>> -#ifdef CONFIG_THERMAL_EMULATION
> >>> -static ssize_t
> >>> -emul_temp_store(struct device *dev, struct device_attribute *attr,
> >>> - const char *buf, size_t count)
> >>> -{
> >>> - struct thermal_zone_device *tz = to_thermal_zone(dev);
> >>> - int ret = 0;
> >>> - unsigned long temperature;
> >>> -
> >>> - if (kstrtoul(buf, 10, &temperature))
> >>> - return -EINVAL;
> >>> -
> >>> - if (!tz->ops->set_emul_temp) {
> >>> - mutex_lock(&tz->lock);
> >>> - tz->emul_temperature = temperature;
> >>> - mutex_unlock(&tz->lock);
> >>> - } else {
> >>> - ret = tz->ops->set_emul_temp(tz, temperature);
> >>> - }
> >>> -
> >>> - return ret ? ret : count;
> >>> -}
> >>> -static DEVICE_ATTR(emul_temp, S_IWUSR, NULL, emul_temp_store);
> >>> -#endif/*CONFIG_THERMAL_EMULATION*/
> >>> -
> >>> -static DEVICE_ATTR(type, 0444, type_show, NULL);
> >>> -static DEVICE_ATTR(temp, 0444, temp_show, NULL);
> >>> -static DEVICE_ATTR(mode, 0644, mode_show, mode_store);
> >>> -static DEVICE_ATTR(passive, S_IRUGO | S_IWUSR, passive_show,
> passive_store);
> >>> -static DEVICE_ATTR(policy, S_IRUGO | S_IWUSR, policy_show,
> policy_store);
> >>> -
> >>> -/* sys I/F for cooling device */
> >>> -#define to_cooling_device(_dev) \
> >>> - container_of(_dev, struct thermal_cooling_device, device)
> >>> -
> >>> -static ssize_t
> >>> -thermal_cooling_device_type_show(struct device *dev,
> >>> - struct device_attribute *attr, char *buf)
> >>> -{
> >>> - struct thermal_cooling_device *cdev = to_cooling_device(dev);
> >>> -
> >>> - return sprintf(buf, "%s\n", cdev->type);
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -thermal_cooling_device_max_state_show(struct device *dev,
> >>> - struct device_attribute *attr, char *buf)
> >>> -{
> >>> - struct thermal_cooling_device *cdev = to_cooling_device(dev);
> >>> - unsigned long state;
> >>> - int ret;
> >>> -
> >>> - ret = cdev->ops->get_max_state(cdev, &state);
> >>> - if (ret)
> >>> - return ret;
> >>> - return sprintf(buf, "%ld\n", state);
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -thermal_cooling_device_cur_state_show(struct device *dev,
> >>> - struct device_attribute *attr, char *buf)
> >>> -{
> >>> - struct thermal_cooling_device *cdev = to_cooling_device(dev);
> >>> - unsigned long state;
> >>> - int ret;
> >>> -
> >>> - ret = cdev->ops->get_cur_state(cdev, &state);
> >>> - if (ret)
> >>> - return ret;
> >>> - return sprintf(buf, "%ld\n", state);
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -thermal_cooling_device_cur_state_store(struct device *dev,
> >>> - struct device_attribute *attr,
> >>> - const char *buf, size_t count)
> >>> -{
> >>> - struct thermal_cooling_device *cdev = to_cooling_device(dev);
> >>> - unsigned long state;
> >>> - int result;
> >>> -
> >>> - if (!sscanf(buf, "%ld\n", &state))
> >>> - return -EINVAL;
> >>> -
> >>> - if ((long)state < 0)
> >>> - return -EINVAL;
> >>> -
> >>> - result = cdev->ops->set_cur_state(cdev, state);
> >>> - if (result)
> >>> - return result;
> >>> - return count;
> >>> -}
> >>> -
> >>> -static struct device_attribute dev_attr_cdev_type =
> >>> -__ATTR(type, 0444, thermal_cooling_device_type_show, NULL);
> >>> -static DEVICE_ATTR(max_state, 0444,
> >>> - thermal_cooling_device_max_state_show, NULL);
> >>> -static DEVICE_ATTR(cur_state, 0644,
> >>> - thermal_cooling_device_cur_state_show,
> >>> - thermal_cooling_device_cur_state_store);
> >>> -
> >>> -static ssize_t
> >>> -thermal_cooling_device_trip_point_show(struct device *dev,
> >>> - struct device_attribute *attr, char *buf)
> >>> -{
> >>> - struct thermal_instance *instance;
> >>> -
> >>> - instance =
> >>> - container_of(attr, struct thermal_instance, attr);
> >>> -
> >>> - if (instance->trip == THERMAL_TRIPS_NONE)
> >>> - return sprintf(buf, "-1\n");
> >>> - else
> >>> - return sprintf(buf, "%d\n", instance->trip);
> >>> -}
> >>> -
> >>> -/* Device management */
> >>> -
> >>> -#if defined(CONFIG_THERMAL_HWMON)
> >>> -
> >>> -/* hwmon sys I/F */
> >>> -#include <linux/hwmon.h>
> >>> -
> >>> -/* thermal zone devices with the same type share one hwmon device
> */
> >>> -struct thermal_hwmon_device {
> >>> - char type[THERMAL_NAME_LENGTH];
> >>> - struct device *device;
> >>> - int count;
> >>> - struct list_head tz_list;
> >>> - struct list_head node;
> >>> -};
> >>> -
> >>> -struct thermal_hwmon_attr {
> >>> - struct device_attribute attr;
> >>> - char name[16];
> >>> -};
> >>> -
> >>> -/* one temperature input for each thermal zone */
> >>> -struct thermal_hwmon_temp {
> >>> - struct list_head hwmon_node;
> >>> - struct thermal_zone_device *tz;
> >>> - struct thermal_hwmon_attr temp_input; /* hwmon sys attr */
> >>> - struct thermal_hwmon_attr temp_crit; /* hwmon sys attr */
> >>> -};
> >>> -
> >>> -static LIST_HEAD(thermal_hwmon_list);
> >>> -
> >>> -static ssize_t
> >>> -name_show(struct device *dev, struct device_attribute *attr, char
> *buf)
> >>> -{
> >>> - struct thermal_hwmon_device *hwmon = dev_get_drvdata(dev);
> >>> - return sprintf(buf, "%s\n", hwmon->type);
> >>> -}
> >>> -static DEVICE_ATTR(name, 0444, name_show, NULL);
> >>> -
> >>> -static ssize_t
> >>> -temp_input_show(struct device *dev, struct device_attribute *attr,
> char *buf)
> >>> -{
> >>> - long temperature;
> >>> - int ret;
> >>> - struct thermal_hwmon_attr *hwmon_attr
> >>> - = container_of(attr, struct thermal_hwmon_attr,
> attr);
> >>> - struct thermal_hwmon_temp *temp
> >>> - = container_of(hwmon_attr, struct
> thermal_hwmon_temp,
> >>> - temp_input);
> >>> - struct thermal_zone_device *tz = temp->tz;
> >>> -
> >>> - ret = thermal_zone_get_temp(tz, &temperature);
> >>> -
> >>> - if (ret)
> >>> - return ret;
> >>> -
> >>> - return sprintf(buf, "%ld\n", temperature);
> >>> -}
> >>> -
> >>> -static ssize_t
> >>> -temp_crit_show(struct device *dev, struct device_attribute *attr,
> >>> - char *buf)
> >>> -{
> >>> - struct thermal_hwmon_attr *hwmon_attr
> >>> - = container_of(attr, struct thermal_hwmon_attr,
> attr);
> >>> - struct thermal_hwmon_temp *temp
> >>> - = container_of(hwmon_attr, struct
> thermal_hwmon_temp,
> >>> - temp_crit);
> >>> - struct thermal_zone_device *tz = temp->tz;
> >>> - long temperature;
> >>> - int ret;
> >>> -
> >>> - ret = tz->ops->get_trip_temp(tz, 0, &temperature);
> >>> - if (ret)
> >>> - return ret;
> >>> -
> >>> - return sprintf(buf, "%ld\n", temperature);
> >>> -}
> >>> -
> >>> -
> >>> -static struct thermal_hwmon_device *
> >>> -thermal_hwmon_lookup_by_type(const struct thermal_zone_device
> *tz)
> >>> -{
> >>> - struct thermal_hwmon_device *hwmon;
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> - list_for_each_entry(hwmon, &thermal_hwmon_list, node)
> >>> - if (!strcmp(hwmon->type, tz->type)) {
> >>> - mutex_unlock(&thermal_list_lock);
> >>> - return hwmon;
> >>> - }
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -
> >>> - return NULL;
> >>> -}
> >>> -
> >>> -/* Find the temperature input matching a given thermal zone */
> >>> -static struct thermal_hwmon_temp *
> >>> -thermal_hwmon_lookup_temp(const struct thermal_hwmon_device
> *hwmon,
> >>> - const struct thermal_zone_device *tz)
> >>> -{
> >>> - struct thermal_hwmon_temp *temp;
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> - list_for_each_entry(temp, &hwmon->tz_list, hwmon_node)
> >>> - if (temp->tz == tz) {
> >>> - mutex_unlock(&thermal_list_lock);
> >>> - return temp;
> >>> - }
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -
> >>> - return NULL;
> >>> -}
> >>> -
> >>> -static int
> >>> -thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
> >>> -{
> >>> - struct thermal_hwmon_device *hwmon;
> >>> - struct thermal_hwmon_temp *temp;
> >>> - int new_hwmon_device = 1;
> >>> - int result;
> >>> -
> >>> - hwmon = thermal_hwmon_lookup_by_type(tz);
> >>> - if (hwmon) {
> >>> - new_hwmon_device = 0;
> >>> - goto register_sys_interface;
> >>> - }
> >>> -
> >>> - hwmon = kzalloc(sizeof(struct thermal_hwmon_device),
> GFP_KERNEL);
> >>> - if (!hwmon)
> >>> - return -ENOMEM;
> >>> -
> >>> - INIT_LIST_HEAD(&hwmon->tz_list);
> >>> - strlcpy(hwmon->type, tz->type, THERMAL_NAME_LENGTH);
> >>> - hwmon->device = hwmon_device_register(NULL);
> >>> - if (IS_ERR(hwmon->device)) {
> >>> - result = PTR_ERR(hwmon->device);
> >>> - goto free_mem;
> >>> - }
> >>> - dev_set_drvdata(hwmon->device, hwmon);
> >>> - result = device_create_file(hwmon->device, &dev_attr_name);
> >>> - if (result)
> >>> - goto free_mem;
> >>> -
> >>> - register_sys_interface:
> >>> - temp = kzalloc(sizeof(struct thermal_hwmon_temp), GFP_KERNEL);
> >>> - if (!temp) {
> >>> - result = -ENOMEM;
> >>> - goto unregister_name;
> >>> - }
> >>> -
> >>> - temp->tz = tz;
> >>> - hwmon->count++;
> >>> -
> >>> - snprintf(temp->temp_input.name, sizeof(temp-
> >temp_input.name),
> >>> - "temp%d_input", hwmon->count);
> >>> - temp->temp_input.attr.attr.name = temp->temp_input.name;
> >>> - temp->temp_input.attr.attr.mode = 0444;
> >>> - temp->temp_input.attr.show = temp_input_show;
> >>> - sysfs_attr_init(&temp->temp_input.attr.attr);
> >>> - result = device_create_file(hwmon->device, &temp-
> >temp_input.attr);
> >>> - if (result)
> >>> - goto free_temp_mem;
> >>> -
> >>> - if (tz->ops->get_crit_temp) {
> >>> - unsigned long temperature;
> >>> - if (!tz->ops->get_crit_temp(tz, &temperature)) {
> >>> - snprintf(temp->temp_crit.name,
> >>> - sizeof(temp->temp_crit.name),
> >>> - "temp%d_crit", hwmon->count);
> >>> - temp->temp_crit.attr.attr.name = temp-
> >temp_crit.name;
> >>> - temp->temp_crit.attr.attr.mode = 0444;
> >>> - temp->temp_crit.attr.show = temp_crit_show;
> >>> - sysfs_attr_init(&temp->temp_crit.attr.attr);
> >>> - result = device_create_file(hwmon->device,
> >>> - &temp->temp_crit.attr);
> >>> - if (result)
> >>> - goto unregister_input;
> >>> - }
> >>> - }
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> - if (new_hwmon_device)
> >>> - list_add_tail(&hwmon->node, &thermal_hwmon_list);
> >>> - list_add_tail(&temp->hwmon_node, &hwmon->tz_list);
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -
> >>> - return 0;
> >>> -
> >>> - unregister_input:
> >>> - device_remove_file(hwmon->device, &temp->temp_input.attr);
> >>> - free_temp_mem:
> >>> - kfree(temp);
> >>> - unregister_name:
> >>> - if (new_hwmon_device) {
> >>> - device_remove_file(hwmon->device, &dev_attr_name);
> >>> - hwmon_device_unregister(hwmon->device);
> >>> - }
> >>> - free_mem:
> >>> - if (new_hwmon_device)
> >>> - kfree(hwmon);
> >>> -
> >>> - return result;
> >>> -}
> >>> -
> >>> -static void
> >>> -thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
> >>> -{
> >>> - struct thermal_hwmon_device *hwmon;
> >>> - struct thermal_hwmon_temp *temp;
> >>> -
> >>> - hwmon = thermal_hwmon_lookup_by_type(tz);
> >>> - if (unlikely(!hwmon)) {
> >>> - /* Should never happen... */
> >>> - dev_dbg(&tz->device, "hwmon device lookup failed!\n");
> >>> - return;
> >>> - }
> >>> -
> >>> - temp = thermal_hwmon_lookup_temp(hwmon, tz);
> >>> - if (unlikely(!temp)) {
> >>> - /* Should never happen... */
> >>> - dev_dbg(&tz->device, "temperature input lookup
> failed!\n");
> >>> - return;
> >>> - }
> >>> -
> >>> - device_remove_file(hwmon->device, &temp->temp_input.attr);
> >>> - if (tz->ops->get_crit_temp)
> >>> - device_remove_file(hwmon->device, &temp-
> >temp_crit.attr);
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> - list_del(&temp->hwmon_node);
> >>> - kfree(temp);
> >>> - if (!list_empty(&hwmon->tz_list)) {
> >>> - mutex_unlock(&thermal_list_lock);
> >>> - return;
> >>> - }
> >>> - list_del(&hwmon->node);
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -
> >>> - device_remove_file(hwmon->device, &dev_attr_name);
> >>> - hwmon_device_unregister(hwmon->device);
> >>> - kfree(hwmon);
> >>> -}
> >>> -#else
> >>> -static int
> >>> -thermal_add_hwmon_sysfs(struct thermal_zone_device *tz)
> >>> -{
> >>> - return 0;
> >>> -}
> >>> -
> >>> -static void
> >>> -thermal_remove_hwmon_sysfs(struct thermal_zone_device *tz)
> >>> -{
> >>> -}
> >>> -#endif
> >>> -
> >>> -/**
> >>> - * thermal_zone_bind_cooling_device - bind a cooling device to a
> thermal zone
> >>> - * @tz: thermal zone device
> >>> - * @trip: indicates which trip point the cooling devices is
> >>> - * associated with in this thermal zone.
> >>> - * @cdev: thermal cooling device
> >>> - *
> >>> - * This function is usually called in the thermal zone device .bind
> callback.
> >>> - */
> >>> -int thermal_zone_bind_cooling_device(struct thermal_zone_device
> *tz,
> >>> - int trip,
> >>> - struct thermal_cooling_device *cdev,
> >>> - unsigned long upper, unsigned long lower)
> >>> -{
> >>> - struct thermal_instance *dev;
> >>> - struct thermal_instance *pos;
> >>> - struct thermal_zone_device *pos1;
> >>> - struct thermal_cooling_device *pos2;
> >>> - unsigned long max_state;
> >>> - int result;
> >>> -
> >>> - if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE))
> >>> - return -EINVAL;
> >>> -
> >>> - list_for_each_entry(pos1, &thermal_tz_list, node) {
> >>> - if (pos1 == tz)
> >>> - break;
> >>> - }
> >>> - list_for_each_entry(pos2, &thermal_cdev_list, node) {
> >>> - if (pos2 == cdev)
> >>> - break;
> >>> - }
> >>> -
> >>> - if (tz != pos1 || cdev != pos2)
> >>> - return -EINVAL;
> >>> -
> >>> - cdev->ops->get_max_state(cdev, &max_state);
> >>> -
> >>> - /* lower default 0, upper default max_state */
> >>> - lower = lower == THERMAL_NO_LIMIT ? 0 : lower;
> >>> - upper = upper == THERMAL_NO_LIMIT ? max_state : upper;
> >>> -
> >>> - if (lower > upper || upper > max_state)
> >>> - return -EINVAL;
> >>> -
> >>> - dev =
> >>> - kzalloc(sizeof(struct thermal_instance), GFP_KERNEL);
> >>> - if (!dev)
> >>> - return -ENOMEM;
> >>> - dev->tz = tz;
> >>> - dev->cdev = cdev;
> >>> - dev->trip = trip;
> >>> - dev->upper = upper;
> >>> - dev->lower = lower;
> >>> - dev->target = THERMAL_NO_TARGET;
> >>> -
> >>> - result = get_idr(&tz->idr, &tz->lock, &dev->id);
> >>> - if (result)
> >>> - goto free_mem;
> >>> -
> >>> - sprintf(dev->name, "cdev%d", dev->id);
> >>> - result =
> >>> - sysfs_create_link(&tz->device.kobj, &cdev->device.kobj, dev-
> >name);
> >>> - if (result)
> >>> - goto release_idr;
> >>> -
> >>> - sprintf(dev->attr_name, "cdev%d_trip_point", dev->id);
> >>> - sysfs_attr_init(&dev->attr.attr);
> >>> - dev->attr.attr.name = dev->attr_name;
> >>> - dev->attr.attr.mode = 0444;
> >>> - dev->attr.show = thermal_cooling_device_trip_point_show;
> >>> - result = device_create_file(&tz->device, &dev->attr);
> >>> - if (result)
> >>> - goto remove_symbol_link;
> >>> -
> >>> - mutex_lock(&tz->lock);
> >>> - mutex_lock(&cdev->lock);
> >>> - list_for_each_entry(pos, &tz->thermal_instances, tz_node)
> >>> - if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
> >>> - result = -EEXIST;
> >>> - break;
> >>> - }
> >>> - if (!result) {
> >>> - list_add_tail(&dev->tz_node, &tz->thermal_instances);
> >>> - list_add_tail(&dev->cdev_node, &cdev-
> >thermal_instances);
> >>> - }
> >>> - mutex_unlock(&cdev->lock);
> >>> - mutex_unlock(&tz->lock);
> >>> -
> >>> - if (!result)
> >>> - return 0;
> >>> -
> >>> - device_remove_file(&tz->device, &dev->attr);
> >>> -remove_symbol_link:
> >>> - sysfs_remove_link(&tz->device.kobj, dev->name);
> >>> -release_idr:
> >>> - release_idr(&tz->idr, &tz->lock, dev->id);
> >>> -free_mem:
> >>> - kfree(dev);
> >>> - return result;
> >>> -}
> >>> -EXPORT_SYMBOL(thermal_zone_bind_cooling_device);
> >>> -
> >>> -/**
> >>> - * thermal_zone_unbind_cooling_device - unbind a cooling device from
> a thermal zone
> >>> - * @tz: thermal zone device
> >>> - * @trip: indicates which trip point the cooling devices is
> >>> - * associated with in this thermal zone.
> >>> - * @cdev: thermal cooling device
> >>> - *
> >>> - * This function is usually called in the thermal zone device .unbind
> callback.
> >>> - */
> >>> -int thermal_zone_unbind_cooling_device(struct thermal_zone_device
> *tz,
> >>> - int trip,
> >>> - struct thermal_cooling_device *cdev)
> >>> -{
> >>> - struct thermal_instance *pos, *next;
> >>> -
> >>> - mutex_lock(&tz->lock);
> >>> - mutex_lock(&cdev->lock);
> >>> - list_for_each_entry_safe(pos, next, &tz->thermal_instances,
> tz_node) {
> >>> - if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) {
> >>> - list_del(&pos->tz_node);
> >>> - list_del(&pos->cdev_node);
> >>> - mutex_unlock(&cdev->lock);
> >>> - mutex_unlock(&tz->lock);
> >>> - goto unbind;
> >>> - }
> >>> - }
> >>> - mutex_unlock(&cdev->lock);
> >>> - mutex_unlock(&tz->lock);
> >>> -
> >>> - return -ENODEV;
> >>> -
> >>> -unbind:
> >>> - device_remove_file(&tz->device, &pos->attr);
> >>> - sysfs_remove_link(&tz->device.kobj, pos->name);
> >>> - release_idr(&tz->idr, &tz->lock, pos->id);
> >>> - kfree(pos);
> >>> - return 0;
> >>> -}
> >>> -EXPORT_SYMBOL(thermal_zone_unbind_cooling_device);
> >>> -
> >>> -static void thermal_release(struct device *dev)
> >>> -{
> >>> - struct thermal_zone_device *tz;
> >>> - struct thermal_cooling_device *cdev;
> >>> -
> >>> - if (!strncmp(dev_name(dev), "thermal_zone",
> >>> - sizeof("thermal_zone") - 1)) {
> >>> - tz = to_thermal_zone(dev);
> >>> - kfree(tz);
> >>> - } else {
> >>> - cdev = to_cooling_device(dev);
> >>> - kfree(cdev);
> >>> - }
> >>> -}
> >>> -
> >>> -static struct class thermal_class = {
> >>> - .name = "thermal",
> >>> - .dev_release = thermal_release,
> >>> -};
> >>> -
> >>> -/**
> >>> - * thermal_cooling_device_register - register a new thermal cooling
> device
> >>> - * @type: the thermal cooling device type.
> >>> - * @devdata: device private data.
> >>> - * @ops: standard thermal cooling devices callbacks.
> >>> - */
> >>> -struct thermal_cooling_device *
> >>> -thermal_cooling_device_register(char *type, void *devdata,
> >>> - const struct thermal_cooling_device_ops
> *ops)
> >>> -{
> >>> - struct thermal_cooling_device *cdev;
> >>> - int result;
> >>> -
> >>> - if (type && strlen(type) >= THERMAL_NAME_LENGTH)
> >>> - return ERR_PTR(-EINVAL);
> >>> -
> >>> - if (!ops || !ops->get_max_state || !ops->get_cur_state ||
> >>> - !ops->set_cur_state)
> >>> - return ERR_PTR(-EINVAL);
> >>> -
> >>> - cdev = kzalloc(sizeof(struct thermal_cooling_device), GFP_KERNEL);
> >>> - if (!cdev)
> >>> - return ERR_PTR(-ENOMEM);
> >>> -
> >>> - result = get_idr(&thermal_cdev_idr, &thermal_idr_lock, &cdev->id);
> >>> - if (result) {
> >>> - kfree(cdev);
> >>> - return ERR_PTR(result);
> >>> - }
> >>> -
> >>> - strcpy(cdev->type, type ? : "");
> >>> - mutex_init(&cdev->lock);
> >>> - INIT_LIST_HEAD(&cdev->thermal_instances);
> >>> - cdev->ops = ops;
> >>> - cdev->updated = true;
> >>> - cdev->device.class = &thermal_class;
> >>> - cdev->devdata = devdata;
> >>> - dev_set_name(&cdev->device, "cooling_device%d", cdev->id);
> >>> - result = device_register(&cdev->device);
> >>> - if (result) {
> >>> - release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev-
> >id);
> >>> - kfree(cdev);
> >>> - return ERR_PTR(result);
> >>> - }
> >>> -
> >>> - /* sys I/F */
> >>> - if (type) {
> >>> - result = device_create_file(&cdev->device,
> &dev_attr_cdev_type);
> >>> - if (result)
> >>> - goto unregister;
> >>> - }
> >>> -
> >>> - result = device_create_file(&cdev->device, &dev_attr_max_state);
> >>> - if (result)
> >>> - goto unregister;
> >>> -
> >>> - result = device_create_file(&cdev->device, &dev_attr_cur_state);
> >>> - if (result)
> >>> - goto unregister;
> >>> -
> >>> - /* Add 'this' new cdev to the global cdev list */
> >>> - mutex_lock(&thermal_list_lock);
> >>> - list_add(&cdev->node, &thermal_cdev_list);
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -
> >>> - /* Update binding information for 'this' new cdev */
> >>> - bind_cdev(cdev);
> >>> -
> >>> - return cdev;
> >>> -
> >>> -unregister:
> >>> - release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
> >>> - device_unregister(&cdev->device);
> >>> - return ERR_PTR(result);
> >>> -}
> >>> -EXPORT_SYMBOL(thermal_cooling_device_register);
> >>> -
> >>> -/**
> >>> - * thermal_cooling_device_unregister - removes the registered thermal
> cooling device
> >>> - * @cdev: the thermal cooling device to remove.
> >>> - *
> >>> - * thermal_cooling_device_unregister() must be called when the device
> is no
> >>> - * longer needed.
> >>> - */
> >>> -void thermal_cooling_device_unregister(struct thermal_cooling_device
> *cdev)
> >>> -{
> >>> - int i;
> >>> - const struct thermal_zone_params *tzp;
> >>> - struct thermal_zone_device *tz;
> >>> - struct thermal_cooling_device *pos = NULL;
> >>> -
> >>> - if (!cdev)
> >>> - return;
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> - list_for_each_entry(pos, &thermal_cdev_list, node)
> >>> - if (pos == cdev)
> >>> - break;
> >>> - if (pos != cdev) {
> >>> - /* thermal cooling device not found */
> >>> - mutex_unlock(&thermal_list_lock);
> >>> - return;
> >>> - }
> >>> - list_del(&cdev->node);
> >>> -
> >>> - /* Unbind all thermal zones associated with 'this' cdev */
> >>> - list_for_each_entry(tz, &thermal_tz_list, node) {
> >>> - if (tz->ops->unbind) {
> >>> - tz->ops->unbind(tz, cdev);
> >>> - continue;
> >>> - }
> >>> -
> >>> - if (!tz->tzp || !tz->tzp->tbp)
> >>> - continue;
> >>> -
> >>> - tzp = tz->tzp;
> >>> - for (i = 0; i < tzp->num_tbps; i++) {
> >>> - if (tzp->tbp[i].cdev == cdev) {
> >>> - __unbind(tz, tzp->tbp[i].trip_mask, cdev);
> >>> - tzp->tbp[i].cdev = NULL;
> >>> - }
> >>> - }
> >>> - }
> >>> -
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -
> >>> - if (cdev->type[0])
> >>> - device_remove_file(&cdev->device, &dev_attr_cdev_type);
> >>> - device_remove_file(&cdev->device, &dev_attr_max_state);
> >>> - device_remove_file(&cdev->device, &dev_attr_cur_state);
> >>> -
> >>> - release_idr(&thermal_cdev_idr, &thermal_idr_lock, cdev->id);
> >>> - device_unregister(&cdev->device);
> >>> - return;
> >>> -}
> >>> -EXPORT_SYMBOL(thermal_cooling_device_unregister);
> >>> -
> >>> -void thermal_cdev_update(struct thermal_cooling_device *cdev)
> >>> -{
> >>> - struct thermal_instance *instance;
> >>> - unsigned long target = 0;
> >>> -
> >>> - /* cooling device is updated*/
> >>> - if (cdev->updated)
> >>> - return;
> >>> -
> >>> - mutex_lock(&cdev->lock);
> >>> - /* Make sure cdev enters the deepest cooling state */
> >>> - list_for_each_entry(instance, &cdev->thermal_instances,
> cdev_node) {
> >>> - if (instance->target == THERMAL_NO_TARGET)
> >>> - continue;
> >>> - if (instance->target > target)
> >>> - target = instance->target;
> >>> - }
> >>> - mutex_unlock(&cdev->lock);
> >>> - cdev->ops->set_cur_state(cdev, target);
> >>> - cdev->updated = true;
> >>> -}
> >>> -EXPORT_SYMBOL(thermal_cdev_update);
> >>> -
> >>> -/**
> >>> - * notify_thermal_framework - Sensor drivers use this API to notify
> framework
> >>> - * @tz: thermal zone device
> >>> - * @trip: indicates which trip point has been crossed
> >>> - *
> >>> - * This function handles the trip events from sensor drivers. It starts
> >>> - * throttling the cooling devices according to the policy configured.
> >>> - * For CRITICAL and HOT trip points, this notifies the respective drivers,
> >>> - * and does actual throttling for other trip points i.e ACTIVE and
> PASSIVE.
> >>> - * The throttling policy is based on the configured platform data; if no
> >>> - * platform data is provided, this uses the step_wise throttling policy.
> >>> - */
> >>> -void notify_thermal_framework(struct thermal_zone_device *tz, int
> trip)
> >>> -{
> >>> - handle_thermal_trip(tz, trip);
> >>> -}
> >>> -EXPORT_SYMBOL(notify_thermal_framework);
> >>> -
> >>> -/**
> >>> - * create_trip_attrs - create attributes for trip points
> >>> - * @tz: the thermal zone device
> >>> - * @mask: Writeable trip point bitmap.
> >>> - */
> >>> -static int create_trip_attrs(struct thermal_zone_device *tz, int mask)
> >>> -{
> >>> - int indx;
> >>> - int size = sizeof(struct thermal_attr) * tz->trips;
> >>> -
> >>> - tz->trip_type_attrs = kzalloc(size, GFP_KERNEL);
> >>> - if (!tz->trip_type_attrs)
> >>> - return -ENOMEM;
> >>> -
> >>> - tz->trip_temp_attrs = kzalloc(size, GFP_KERNEL);
> >>> - if (!tz->trip_temp_attrs) {
> >>> - kfree(tz->trip_type_attrs);
> >>> - return -ENOMEM;
> >>> - }
> >>> -
> >>> - if (tz->ops->get_trip_hyst) {
> >>> - tz->trip_hyst_attrs = kzalloc(size, GFP_KERNEL);
> >>> - if (!tz->trip_hyst_attrs) {
> >>> - kfree(tz->trip_type_attrs);
> >>> - kfree(tz->trip_temp_attrs);
> >>> - return -ENOMEM;
> >>> - }
> >>> - }
> >>> -
> >>> -
> >>> - for (indx = 0; indx < tz->trips; indx++) {
> >>> - /* create trip type attribute */
> >>> - snprintf(tz->trip_type_attrs[indx].name,
> THERMAL_NAME_LENGTH,
> >>> - "trip_point_%d_type", indx);
> >>> -
> >>> - sysfs_attr_init(&tz->trip_type_attrs[indx].attr.attr);
> >>> - tz->trip_type_attrs[indx].attr.attr.name =
> >>> - tz-
> >trip_type_attrs[indx].name;
> >>> - tz->trip_type_attrs[indx].attr.attr.mode = S_IRUGO;
> >>> - tz->trip_type_attrs[indx].attr.show = trip_point_type_show;
> >>> -
> >>> - device_create_file(&tz->device,
> >>> - &tz->trip_type_attrs[indx].attr);
> >>> -
> >>> - /* create trip temp attribute */
> >>> - snprintf(tz->trip_temp_attrs[indx].name,
> THERMAL_NAME_LENGTH,
> >>> - "trip_point_%d_temp", indx);
> >>> -
> >>> - sysfs_attr_init(&tz->trip_temp_attrs[indx].attr.attr);
> >>> - tz->trip_temp_attrs[indx].attr.attr.name =
> >>> - tz-
> >trip_temp_attrs[indx].name;
> >>> - tz->trip_temp_attrs[indx].attr.attr.mode = S_IRUGO;
> >>> - tz->trip_temp_attrs[indx].attr.show =
> trip_point_temp_show;
> >>> - if (mask & (1 << indx)) {
> >>> - tz->trip_temp_attrs[indx].attr.attr.mode |=
> S_IWUSR;
> >>> - tz->trip_temp_attrs[indx].attr.store =
> >>> -
> trip_point_temp_store;
> >>> - }
> >>> -
> >>> - device_create_file(&tz->device,
> >>> - &tz->trip_temp_attrs[indx].attr);
> >>> -
> >>> - /* create Optional trip hyst attribute */
> >>> - if (!tz->ops->get_trip_hyst)
> >>> - continue;
> >>> - snprintf(tz->trip_hyst_attrs[indx].name,
> THERMAL_NAME_LENGTH,
> >>> - "trip_point_%d_hyst", indx);
> >>> -
> >>> - sysfs_attr_init(&tz->trip_hyst_attrs[indx].attr.attr);
> >>> - tz->trip_hyst_attrs[indx].attr.attr.name =
> >>> - tz->trip_hyst_attrs[indx].name;
> >>> - tz->trip_hyst_attrs[indx].attr.attr.mode = S_IRUGO;
> >>> - tz->trip_hyst_attrs[indx].attr.show = trip_point_hyst_show;
> >>> - if (tz->ops->set_trip_hyst) {
> >>> - tz->trip_hyst_attrs[indx].attr.attr.mode |= S_IWUSR;
> >>> - tz->trip_hyst_attrs[indx].attr.store =
> >>> - trip_point_hyst_store;
> >>> - }
> >>> -
> >>> - device_create_file(&tz->device,
> >>> - &tz->trip_hyst_attrs[indx].attr);
> >>> - }
> >>> - return 0;
> >>> -}
> >>> -
> >>> -static void remove_trip_attrs(struct thermal_zone_device *tz)
> >>> -{
> >>> - int indx;
> >>> -
> >>> - for (indx = 0; indx < tz->trips; indx++) {
> >>> - device_remove_file(&tz->device,
> >>> - &tz->trip_type_attrs[indx].attr);
> >>> - device_remove_file(&tz->device,
> >>> - &tz->trip_temp_attrs[indx].attr);
> >>> - if (tz->ops->get_trip_hyst)
> >>> - device_remove_file(&tz->device,
> >>> - &tz->trip_hyst_attrs[indx].attr);
> >>> - }
> >>> - kfree(tz->trip_type_attrs);
> >>> - kfree(tz->trip_temp_attrs);
> >>> - kfree(tz->trip_hyst_attrs);
> >>> -}
> >>> -
> >>> -/**
> >>> - * thermal_zone_device_register - register a new thermal zone device
> >>> - * @type: the thermal zone device type
> >>> - * @trips: the number of trip points the thermal zone support
> >>> - * @mask: a bit string indicating the writeablility of trip points
> >>> - * @devdata: private device data
> >>> - * @ops: standard thermal zone device callbacks
> >>> - * @tzp: thermal zone platform parameters
> >>> - * @passive_delay: number of milliseconds to wait between polls when
> >>> - * performing passive cooling
> >>> - * @polling_delay: number of milliseconds to wait between polls when
> checking
> >>> - * whether trip points have been crossed (0 for interrupt
> >>> - * driven systems)
> >>> - *
> >>> - * thermal_zone_device_unregister() must be called when the device is
> no
> >>> - * longer needed. The passive cooling depends on the .get_trend()
> return value.
> >>> - */
> >>> -struct thermal_zone_device *thermal_zone_device_register(const
> char *type,
> >>> - int trips, int mask, void *devdata,
> >>> - const struct thermal_zone_device_ops *ops,
> >>> - const struct thermal_zone_params *tzp,
> >>> - int passive_delay, int polling_delay)
> >>> -{
> >>> - struct thermal_zone_device *tz;
> >>> - enum thermal_trip_type trip_type;
> >>> - int result;
> >>> - int count;
> >>> - int passive = 0;
> >>> -
> >>> - if (type && strlen(type) >= THERMAL_NAME_LENGTH)
> >>> - return ERR_PTR(-EINVAL);
> >>> -
> >>> - if (trips > THERMAL_MAX_TRIPS || trips < 0 || mask >> trips)
> >>> - return ERR_PTR(-EINVAL);
> >>> -
> >>> - if (!ops || !ops->get_temp)
> >>> - return ERR_PTR(-EINVAL);
> >>> -
> >>> - if (trips > 0 && !ops->get_trip_type)
> >>> - return ERR_PTR(-EINVAL);
> >>> -
> >>> - tz = kzalloc(sizeof(struct thermal_zone_device), GFP_KERNEL);
> >>> - if (!tz)
> >>> - return ERR_PTR(-ENOMEM);
> >>> -
> >>> - INIT_LIST_HEAD(&tz->thermal_instances);
> >>> - idr_init(&tz->idr);
> >>> - mutex_init(&tz->lock);
> >>> - result = get_idr(&thermal_tz_idr, &thermal_idr_lock, &tz->id);
> >>> - if (result) {
> >>> - kfree(tz);
> >>> - return ERR_PTR(result);
> >>> - }
> >>> -
> >>> - strcpy(tz->type, type ? : "");
> >>> - tz->ops = ops;
> >>> - tz->tzp = tzp;
> >>> - tz->device.class = &thermal_class;
> >>> - tz->devdata = devdata;
> >>> - tz->trips = trips;
> >>> - tz->passive_delay = passive_delay;
> >>> - tz->polling_delay = polling_delay;
> >>> -
> >>> - dev_set_name(&tz->device, "thermal_zone%d", tz->id);
> >>> - result = device_register(&tz->device);
> >>> - if (result) {
> >>> - release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
> >>> - kfree(tz);
> >>> - return ERR_PTR(result);
> >>> - }
> >>> -
> >>> - /* sys I/F */
> >>> - if (type) {
> >>> - result = device_create_file(&tz->device, &dev_attr_type);
> >>> - if (result)
> >>> - goto unregister;
> >>> - }
> >>> -
> >>> - result = device_create_file(&tz->device, &dev_attr_temp);
> >>> - if (result)
> >>> - goto unregister;
> >>> -
> >>> - if (ops->get_mode) {
> >>> - result = device_create_file(&tz->device, &dev_attr_mode);
> >>> - if (result)
> >>> - goto unregister;
> >>> - }
> >>> -
> >>> - result = create_trip_attrs(tz, mask);
> >>> - if (result)
> >>> - goto unregister;
> >>> -
> >>> - for (count = 0; count < trips; count++) {
> >>> - tz->ops->get_trip_type(tz, count, &trip_type);
> >>> - if (trip_type == THERMAL_TRIP_PASSIVE)
> >>> - passive = 1;
> >>> - }
> >>> -
> >>> - if (!passive) {
> >>> - result = device_create_file(&tz->device, &dev_attr_passive);
> >>> - if (result)
> >>> - goto unregister;
> >>> - }
> >>> -
> >>> -#ifdef CONFIG_THERMAL_EMULATION
> >>> - result = device_create_file(&tz->device, &dev_attr_emul_temp);
> >>> - if (result)
> >>> - goto unregister;
> >>> -#endif
> >>> - /* Create policy attribute */
> >>> - result = device_create_file(&tz->device, &dev_attr_policy);
> >>> - if (result)
> >>> - goto unregister;
> >>> -
> >>> - /* Update 'this' zone's governor information */
> >>> - mutex_lock(&thermal_governor_lock);
> >>> -
> >>> - if (tz->tzp)
> >>> - tz->governor = __find_governor(tz->tzp->governor_name);
> >>> - else
> >>> - tz->governor =
> __find_governor(DEFAULT_THERMAL_GOVERNOR);
> >>> -
> >>> - mutex_unlock(&thermal_governor_lock);
> >>> -
> >>> - result = thermal_add_hwmon_sysfs(tz);
> >>> - if (result)
> >>> - goto unregister;
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> - list_add_tail(&tz->node, &thermal_tz_list);
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -
> >>> - /* Bind cooling devices for this zone */
> >>> - bind_tz(tz);
> >>> -
> >>> - INIT_DELAYED_WORK(&(tz->poll_queue),
> thermal_zone_device_check);
> >>> -
> >>> - thermal_zone_device_update(tz);
> >>> -
> >>> - if (!result)
> >>> - return tz;
> >>> -
> >>> -unregister:
> >>> - release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
> >>> - device_unregister(&tz->device);
> >>> - return ERR_PTR(result);
> >>> -}
> >>> -EXPORT_SYMBOL(thermal_zone_device_register);
> >>> -
> >>> -/**
> >>> - * thermal_device_unregister - removes the registered thermal zone
> device
> >>> - * @tz: the thermal zone device to remove
> >>> - */
> >>> -void thermal_zone_device_unregister(struct thermal_zone_device *tz)
> >>> -{
> >>> - int i;
> >>> - const struct thermal_zone_params *tzp;
> >>> - struct thermal_cooling_device *cdev;
> >>> - struct thermal_zone_device *pos = NULL;
> >>> -
> >>> - if (!tz)
> >>> - return;
> >>> -
> >>> - tzp = tz->tzp;
> >>> -
> >>> - mutex_lock(&thermal_list_lock);
> >>> - list_for_each_entry(pos, &thermal_tz_list, node)
> >>> - if (pos == tz)
> >>> - break;
> >>> - if (pos != tz) {
> >>> - /* thermal zone device not found */
> >>> - mutex_unlock(&thermal_list_lock);
> >>> - return;
> >>> - }
> >>> - list_del(&tz->node);
> >>> -
> >>> - /* Unbind all cdevs associated with 'this' thermal zone */
> >>> - list_for_each_entry(cdev, &thermal_cdev_list, node) {
> >>> - if (tz->ops->unbind) {
> >>> - tz->ops->unbind(tz, cdev);
> >>> - continue;
> >>> - }
> >>> -
> >>> - if (!tzp || !tzp->tbp)
> >>> - break;
> >>> -
> >>> - for (i = 0; i < tzp->num_tbps; i++) {
> >>> - if (tzp->tbp[i].cdev == cdev) {
> >>> - __unbind(tz, tzp->tbp[i].trip_mask, cdev);
> >>> - tzp->tbp[i].cdev = NULL;
> >>> - }
> >>> - }
> >>> - }
> >>> -
> >>> - mutex_unlock(&thermal_list_lock);
> >>> -
> >>> - thermal_zone_device_set_polling(tz, 0);
> >>> -
> >>> - if (tz->type[0])
> >>> - device_remove_file(&tz->device, &dev_attr_type);
> >>> - device_remove_file(&tz->device, &dev_attr_temp);
> >>> - if (tz->ops->get_mode)
> >>> - device_remove_file(&tz->device, &dev_attr_mode);
> >>> - device_remove_file(&tz->device, &dev_attr_policy);
> >>> - remove_trip_attrs(tz);
> >>> - tz->governor = NULL;
> >>> -
> >>> - thermal_remove_hwmon_sysfs(tz);
> >>> - release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id);
> >>> - idr_destroy(&tz->idr);
> >>> - mutex_destroy(&tz->lock);
> >>> - device_unregister(&tz->device);
> >>> - return;
> >>> -}
> >>> -EXPORT_SYMBOL(thermal_zone_device_unregister);
> >>> -
> >>> -#ifdef CONFIG_NET
> >>> -static struct genl_family thermal_event_genl_family = {
> >>> - .id = GENL_ID_GENERATE,
> >>> - .name = THERMAL_GENL_FAMILY_NAME,
> >>> - .version = THERMAL_GENL_VERSION,
> >>> - .maxattr = THERMAL_GENL_ATTR_MAX,
> >>> -};
> >>> -
> >>> -static struct genl_multicast_group thermal_event_mcgrp = {
> >>> - .name = THERMAL_GENL_MCAST_GROUP_NAME,
> >>> -};
> >>> -
> >>> -int thermal_generate_netlink_event(struct thermal_zone_device *tz,
> >>> - enum events event)
> >>> -{
> >>> - struct sk_buff *skb;
> >>> - struct nlattr *attr;
> >>> - struct thermal_genl_event *thermal_event;
> >>> - void *msg_header;
> >>> - int size;
> >>> - int result;
> >>> - static unsigned int thermal_event_seqnum;
> >>> -
> >>> - if (!tz)
> >>> - return -EINVAL;
> >>> -
> >>> - /* allocate memory */
> >>> - size = nla_total_size(sizeof(struct thermal_genl_event)) +
> >>> - nla_total_size(0);
> >>> -
> >>> - skb = genlmsg_new(size, GFP_ATOMIC);
> >>> - if (!skb)
> >>> - return -ENOMEM;
> >>> -
> >>> - /* add the genetlink message header */
> >>> - msg_header = genlmsg_put(skb, 0, thermal_event_seqnum++,
> >>> - &thermal_event_genl_family, 0,
> >>> - THERMAL_GENL_CMD_EVENT);
> >>> - if (!msg_header) {
> >>> - nlmsg_free(skb);
> >>> - return -ENOMEM;
> >>> - }
> >>> -
> >>> - /* fill the data */
> >>> - attr = nla_reserve(skb, THERMAL_GENL_ATTR_EVENT,
> >>> - sizeof(struct thermal_genl_event));
> >>> -
> >>> - if (!attr) {
> >>> - nlmsg_free(skb);
> >>> - return -EINVAL;
> >>> - }
> >>> -
> >>> - thermal_event = nla_data(attr);
> >>> - if (!thermal_event) {
> >>> - nlmsg_free(skb);
> >>> - return -EINVAL;
> >>> - }
> >>> -
> >>> - memset(thermal_event, 0, sizeof(struct thermal_genl_event));
> >>> -
> >>> - thermal_event->orig = tz->id;
> >>> - thermal_event->event = event;
> >>> -
> >>> - /* send multicast genetlink message */
> >>> - result = genlmsg_end(skb, msg_header);
> >>> - if (result < 0) {
> >>> - nlmsg_free(skb);
> >>> - return result;
> >>> - }
> >>> -
> >>> - result = genlmsg_multicast(skb, 0, thermal_event_mcgrp.id,
> GFP_ATOMIC);
> >>> - if (result)
> >>> - dev_err(&tz->device, "Failed to send netlink event:%d",
> result);
> >>> -
> >>> - return result;
> >>> -}
> >>> -EXPORT_SYMBOL(thermal_generate_netlink_event);
> >>> -
> >>> -static int genetlink_init(void)
> >>> -{
> >>> - int result;
> >>> -
> >>> - result = genl_register_family(&thermal_event_genl_family);
> >>> - if (result)
> >>> - return result;
> >>> -
> >>> - result = genl_register_mc_group(&thermal_event_genl_family,
> >>> - &thermal_event_mcgrp);
> >>> - if (result)
> >>> - genl_unregister_family(&thermal_event_genl_family);
> >>> - return result;
> >>> -}
> >>> -
> >>> -static void genetlink_exit(void)
> >>> -{
> >>> - genl_unregister_family(&thermal_event_genl_family);
> >>> -}
> >>> -#else /* !CONFIG_NET */
> >>> -static inline int genetlink_init(void) { return 0; }
> >>> -static inline void genetlink_exit(void) {}
> >>> -#endif /* !CONFIG_NET */
> >>> -
> >>> -static int __init thermal_init(void)
> >>> -{
> >>> - int result = 0;
> >>> -
> >>> - result = class_register(&thermal_class);
> >>> - if (result) {
> >>> - idr_destroy(&thermal_tz_idr);
> >>> - idr_destroy(&thermal_cdev_idr);
> >>> - mutex_destroy(&thermal_idr_lock);
> >>> - mutex_destroy(&thermal_list_lock);
> >>> - return result;
> >>> - }
> >>> - result = genetlink_init();
> >>> - return result;
> >>> -}
> >>> -
> >>> -static void __exit thermal_exit(void)
> >>> -{
> >>> - class_unregister(&thermal_class);
> >>> - idr_destroy(&thermal_tz_idr);
> >>> - idr_destroy(&thermal_cdev_idr);
> >>> - mutex_destroy(&thermal_idr_lock);
> >>> - mutex_destroy(&thermal_list_lock);
> >>> - genetlink_exit();
> >>> -}
> >>> -
> >>> -fs_initcall(thermal_init);
> >>> -module_exit(thermal_exit);
> >>>
> >>
> >
> >
> >
> >

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