[PATCH 07/10] olpc_dcon: move more variables into dcon_priv

From: Andres Salomon
Date: Thu Feb 10 2011 - 20:54:33 EST


This moves dcon_source and dcon_pending into the dcon_priv struct.

Because these variables are used by the IRQ handler (which is
registered in the model-specific callbacks), we end up needing
to move dcon_priv into olpc_dcon.h. This also changes the IRQ
registration to use the dcon_priv pointer as dev_id, instead of
dcon_driver.

Signed-off-by: Andres Salomon <dilinger@xxxxxxxxxx>
---
drivers/staging/olpc_dcon/olpc_dcon.c | 51 +++++++-------------------
drivers/staging/olpc_dcon/olpc_dcon.h | 32 ++++++++++++++--
drivers/staging/olpc_dcon/olpc_dcon_xo_1.c | 10 +++---
drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c | 9 ++---
4 files changed, 51 insertions(+), 51 deletions(-)

diff --git a/drivers/staging/olpc_dcon/olpc_dcon.c b/drivers/staging/olpc_dcon/olpc_dcon.c
index 96b6fd2..cdd8718 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon.c
@@ -23,7 +23,6 @@
#include <linux/delay.h>
#include <linux/backlight.h>
#include <linux/device.h>
-#include <linux/notifier.h>
#include <linux/uaccess.h>
#include <linux/ctype.h>
#include <linux/reboot.h>
@@ -46,24 +45,6 @@ module_param(useaa, int, 0444);

static struct dcon_platform_data *pdata;

-struct dcon_priv {
- struct i2c_client *client;
- struct fb_info *fbinfo;
-
- struct work_struct switch_source;
- struct notifier_block reboot_nb;
- struct notifier_block fbevent_nb;
-
- /* Shadow register for the DCON_REG_MODE register */
- u8 disp_mode;
-
- /* Current output type; true == mono, false == color */
- bool mono;
- bool asleep;
- /* This get set while controlling fb blank state from the driver */
- bool ignore_fb_events;
-};
-
/* I2C structures */

/* Platform devices */
@@ -72,12 +53,6 @@ static struct platform_device *dcon_device;
/* Backlight device */
static struct backlight_device *dcon_bl_dev;

-/* Current source, initialized at probe time */
-int dcon_source;
-
-/* Desired source */
-int dcon_pending;
-
/* Variables used during switches */
static int dcon_switched;
static struct timespec dcon_irq_time;
@@ -119,7 +94,7 @@ static int dcon_hw_init(struct dcon_priv *dcon, int is_init)
if (is_init) {
printk(KERN_INFO "olpc-dcon: Discovered DCON version %x\n",
ver & 0xFF);
- rc = pdata->init();
+ rc = pdata->init(dcon);
if (rc != 0) {
printk(KERN_ERR "olpc-dcon: Unable to init.\n");
goto err;
@@ -366,9 +341,9 @@ static void dcon_source_switch(struct work_struct *work)
struct dcon_priv *dcon = container_of(work, struct dcon_priv,
switch_source);
DECLARE_WAITQUEUE(wait, current);
- int source = dcon_pending;
+ int source = dcon->pending_src;

- if (dcon_source == source)
+ if (dcon->curr_src == source)
return;

dcon_load_holdoff();
@@ -406,7 +381,7 @@ static void dcon_source_switch(struct work_struct *work)
*/
if (!dcon_blank_fb(dcon, false)) {
printk(KERN_ERR "olpc-dcon: Failed to enter CPU mode\n");
- dcon_pending = DCON_SOURCE_DCON;
+ dcon->pending_src = DCON_SOURCE_DCON;
return;
}

@@ -468,17 +443,17 @@ static void dcon_source_switch(struct work_struct *work)
BUG();
}

- dcon_source = source;
+ dcon->curr_src = source;
}

static void dcon_set_source(struct dcon_priv *dcon, int arg)
{
- if (dcon_pending == arg)
+ if (dcon->pending_src == arg)
return;

- dcon_pending = arg;
+ dcon->pending_src = arg;

- if ((dcon_source != arg) && !work_pending(&dcon->switch_source))
+ if ((dcon->curr_src != arg) && !work_pending(&dcon->switch_source))
schedule_work(&dcon->switch_source);
}

@@ -524,7 +499,8 @@ static ssize_t dcon_sleep_show(struct device *dev,
static ssize_t dcon_freeze_show(struct device *dev,
struct device_attribute *attr, char *buf)
{
- return sprintf(buf, "%d\n", dcon_source == DCON_SOURCE_DCON ? 1 : 0);
+ struct dcon_priv *dcon = dev_get_drvdata(dev);
+ return sprintf(buf, "%d\n", dcon->curr_src == DCON_SOURCE_DCON ? 1 : 0);
}

static ssize_t dcon_mono_show(struct device *dev,
@@ -765,7 +741,7 @@ static int dcon_probe(struct i2c_client *client, const struct i2c_device_id *id)
platform_device_unregister(dcon_device);
dcon_device = NULL;
eirq:
- free_irq(DCON_IRQ, &dcon_driver);
+ free_irq(DCON_IRQ, dcon);
einit:
i2c_set_clientdata(client, NULL);
kfree(dcon);
@@ -782,7 +758,7 @@ static int dcon_remove(struct i2c_client *client)
unregister_reboot_notifier(&dcon->reboot_nb);
atomic_notifier_chain_unregister(&panic_notifier_list, &dcon_panic_nb);

- free_irq(DCON_IRQ, &dcon_driver);
+ free_irq(DCON_IRQ, dcon);

if (dcon_bl_dev != NULL)
backlight_device_unregister(dcon_bl_dev);
@@ -826,6 +802,7 @@ static int dcon_resume(struct i2c_client *client)

irqreturn_t dcon_interrupt(int irq, void *id)
{
+ struct dcon_priv *dcon = id;
int status = pdata->read_status();

if (status == -1)
@@ -851,7 +828,7 @@ irqreturn_t dcon_interrupt(int irq, void *id)
* of the DCON happened long before this point.
* see http://dev.laptop.org/ticket/9869
*/
- if (dcon_source != dcon_pending && !dcon_switched) {
+ if (dcon->curr_src != dcon->pending_src && !dcon_switched) {
dcon_switched = 1;
getnstimeofday(&dcon_irq_time);
wake_up(&dcon_wait_queue);
diff --git a/drivers/staging/olpc_dcon/olpc_dcon.h b/drivers/staging/olpc_dcon/olpc_dcon.h
index 03ac42c..2c06e19 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon.h
+++ b/drivers/staging/olpc_dcon/olpc_dcon.h
@@ -1,6 +1,9 @@
#ifndef OLPC_DCON_H_
#define OLPC_DCON_H_

+#include <linux/notifier.h>
+#include <linux/workqueue.h>
+
/* DCON registers */

#define DCON_REG_ID 0
@@ -44,8 +47,32 @@
/* Interrupt */
#define DCON_IRQ 6

+struct dcon_priv {
+ struct i2c_client *client;
+ struct fb_info *fbinfo;
+
+ struct work_struct switch_source;
+ struct notifier_block reboot_nb;
+ struct notifier_block fbevent_nb;
+
+ /* Shadow register for the DCON_REG_MODE register */
+ u8 disp_mode;
+
+ /* Current source, initialized at probe time */
+ int curr_src;
+
+ /* Desired source */
+ int pending_src;
+
+ /* Current output type; true == mono, false == color */
+ bool mono;
+ bool asleep;
+ /* This get set while controlling fb blank state from the driver */
+ bool ignore_fb_events;
+};
+
struct dcon_platform_data {
- int (*init)(void);
+ int (*init)(struct dcon_priv *);
void (*bus_stabilize_wiggle)(void);
void (*set_dconload)(int);
u8 (*read_status)(void);
@@ -53,10 +80,7 @@ struct dcon_platform_data {

#include <linux/interrupt.h>

-extern int dcon_source;
-extern int dcon_pending;
extern irqreturn_t dcon_interrupt(int irq, void *id);
-extern struct i2c_driver dcon_driver;

#ifdef CONFIG_FB_OLPC_DCON_1
extern struct dcon_platform_data dcon_pdata_xo_1;
diff --git a/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c b/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c
index be52b6c..b154be7 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon_xo_1.c
@@ -16,7 +16,7 @@

#include "olpc_dcon.h"

-static int dcon_init_xo_1(void)
+static int dcon_init_xo_1(struct dcon_priv *dcon)
{
unsigned char lob;

@@ -54,10 +54,10 @@ static int dcon_init_xo_1(void)
* then a value is set. So, future readings of the pin can use
* READ_BACK, but the first one cannot. Awesome, huh?
*/
- dcon_source = cs5535_gpio_isset(OLPC_GPIO_DCON_LOAD, GPIO_OUTPUT_VAL)
+ dcon->curr_src = cs5535_gpio_isset(OLPC_GPIO_DCON_LOAD, GPIO_OUTPUT_VAL)
? DCON_SOURCE_CPU
: DCON_SOURCE_DCON;
- dcon_pending = dcon_source;
+ dcon->pending_src = dcon->curr_src;

/* Set the directions for the GPIO pins */
gpio_direction_input(OLPC_GPIO_DCON_STAT0);
@@ -65,7 +65,7 @@ static int dcon_init_xo_1(void)
gpio_direction_input(OLPC_GPIO_DCON_IRQ);
gpio_direction_input(OLPC_GPIO_DCON_BLANK);
gpio_direction_output(OLPC_GPIO_DCON_LOAD,
- dcon_source == DCON_SOURCE_CPU);
+ dcon->curr_src == DCON_SOURCE_CPU);

/* Set up the interrupt mappings */

@@ -81,7 +81,7 @@ static int dcon_init_xo_1(void)
outb(lob, 0x4d0);

/* Register the interupt handler */
- if (request_irq(DCON_IRQ, &dcon_interrupt, 0, "DCON", &dcon_driver)) {
+ if (request_irq(DCON_IRQ, &dcon_interrupt, 0, "DCON", dcon)) {
printk(KERN_ERR "olpc-dcon: failed to request DCON's irq\n");
goto err_req_irq;
}
diff --git a/drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c b/drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c
index d4c2d74..e213b63 100644
--- a/drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c
+++ b/drivers/staging/olpc_dcon/olpc_dcon_xo_1_5.c
@@ -57,7 +57,7 @@ static int dcon_was_irq(void)
return 0;
}

-static int dcon_init_xo_1_5(void)
+static int dcon_init_xo_1_5(struct dcon_priv *dcon)
{
unsigned int irq;
u_int8_t tmp;
@@ -96,20 +96,19 @@ static int dcon_init_xo_1_5(void)

/* Determine the current state of DCONLOAD, likely set by firmware */
/* GPIO1 */
- dcon_source = (inl(VX855_GENL_PURPOSE_OUTPUT) & 0x1000) ?
+ dcon->curr_src = (inl(VX855_GENL_PURPOSE_OUTPUT) & 0x1000) ?
DCON_SOURCE_CPU : DCON_SOURCE_DCON;
- dcon_pending = dcon_source;
+ dcon->pending_src = dcon->curr_src;

pci_dev_put(pdev);

/* we're sharing the IRQ with ACPI */
irq = acpi_gbl_FADT.sci_interrupt;
- if (request_irq(irq, &dcon_interrupt, IRQF_SHARED, "DCON", &dcon_driver)) {
+ if (request_irq(irq, &dcon_interrupt, IRQF_SHARED, "DCON", dcon)) {
printk(KERN_ERR PREFIX "DCON (IRQ%d) allocation failed\n", irq);
return 1;
}

-
return 0;
}

--
1.7.2.3

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