Re: [PATCHv2 3/4] power: Add Qualcomm SMBB driver
From: Bjorn Andersson
Date: Fri Aug 28 2015 - 18:56:39 EST
On Thu 30 Jul 10:53 PDT 2015, Bjorn Andersson wrote:
Ping?
> From: Courtney Cavin <courtney.cavin@xxxxxxxxxxxxxx>
>
> Add the Qualcomm Switch-Mode Battery Charger and Boost driver, found in
> pm8941.
>
> Signed-off-by: Courtney Cavin <courtney.cavin@xxxxxxxxxxxxxx>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@xxxxxxxxxxxxxx>
> ---
>
> Changes since v1:
> - Corrected authorship
> - Dropped MODULE_ALIAS
>
> drivers/power/Kconfig | 12 +
> drivers/power/Makefile | 1 +
> drivers/power/qcom_smbb.c | 951 ++++++++++++++++++++++++++++++++++++++++++++++
> 3 files changed, 964 insertions(+)
> create mode 100644 drivers/power/qcom_smbb.c
>
> diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
> index 08beeed5485d..cfc236655661 100644
> --- a/drivers/power/Kconfig
> +++ b/drivers/power/Kconfig
> @@ -379,6 +379,18 @@ config CHARGER_MAX8998
> Say Y to enable support for the battery charger control sysfs and
> platform data of MAX8998/LP3974 PMICs.
>
> +config CHARGER_QCOM_SMBB
> + tristate "Qualcomm Switch-Mode Battery Charger and Boost"
> + depends on MFD_SPMI_PMIC || COMPILE_TEST
> + depends on OF
> + help
> + Say Y to include support for the Switch-Mode Battery Charger and
> + Boost (SMBB) hardware found in Qualcomm PM8941 PMICs. The charger
> + is an integrated, single-cell lithium-ion battery charger. DT
> + configuration is required for loading, see the devicetree
> + documentation for more detail. The base name for this driver is
> + 'pm8941_charger'.
> +
> config CHARGER_BQ2415X
> tristate "TI BQ2415x battery charger driver"
> depends on I2C
> diff --git a/drivers/power/Makefile b/drivers/power/Makefile
> index 5752ce818f51..48e459243820 100644
> --- a/drivers/power/Makefile
> +++ b/drivers/power/Makefile
> @@ -57,6 +57,7 @@ obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o
> obj-$(CONFIG_CHARGER_MAX77693) += max77693_charger.o
> obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
> obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
> +obj-$(CONFIG_CHARGER_QCOM_SMBB) += qcom_smbb.o
> obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
> obj-$(CONFIG_CHARGER_BQ24190) += bq24190_charger.o
> obj-$(CONFIG_CHARGER_BQ24257) += bq24257_charger.o
> diff --git a/drivers/power/qcom_smbb.c b/drivers/power/qcom_smbb.c
> new file mode 100644
> index 000000000000..0dabfe8cceb2
> --- /dev/null
> +++ b/drivers/power/qcom_smbb.c
> @@ -0,0 +1,951 @@
> +/* Copyright (c) 2014, Sony Mobile Communications Inc.
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 and
> + * only version 2 as published by the Free Software Foundation.
> + *
> + * 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.
> + *
> + * This driver is for the multi-block Switch-Mode Battery Charger and Boost
> + * (SMBB) hardware, found in Qualcomm PM8941 PMICs. The charger is an
> + * integrated, single-cell lithium-ion battery charger.
> + *
> + * Sub-components:
> + * - Charger core
> + * - Buck
> + * - DC charge-path
> + * - USB charge-path
> + * - Battery interface
> + * - Boost (not implemented)
> + * - Misc
> + * - HF-Buck
> + */
> +
> +#include <linux/errno.h>
> +#include <linux/interrupt.h>
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/mutex.h>
> +#include <linux/of.h>
> +#include <linux/platform_device.h>
> +#include <linux/power_supply.h>
> +#include <linux/regmap.h>
> +#include <linux/slab.h>
> +
> +#define SMBB_CHG_VMAX 0x040
> +#define SMBB_CHG_VSAFE 0x041
> +#define SMBB_CHG_CFG 0x043
> +#define SMBB_CHG_IMAX 0x044
> +#define SMBB_CHG_ISAFE 0x045
> +#define SMBB_CHG_VIN_MIN 0x047
> +#define SMBB_CHG_CTRL 0x049
> +#define CTRL_EN BIT(7)
> +#define SMBB_CHG_VBAT_WEAK 0x052
> +#define SMBB_CHG_IBAT_TERM_CHG 0x05b
> +#define IBAT_TERM_CHG_IEOC BIT(7)
> +#define IBAT_TERM_CHG_IEOC_BMS BIT(7)
> +#define IBAT_TERM_CHG_IEOC_CHG 0
> +#define SMBB_CHG_VBAT_DET 0x05d
> +#define SMBB_CHG_TCHG_MAX_EN 0x060
> +#define TCHG_MAX_EN BIT(7)
> +#define SMBB_CHG_WDOG_TIME 0x062
> +#define SMBB_CHG_WDOG_EN 0x065
> +#define WDOG_EN BIT(7)
> +
> +#define SMBB_BUCK_REG_MODE 0x174
> +#define BUCK_REG_MODE BIT(0)
> +#define BUCK_REG_MODE_VBAT BIT(0)
> +#define BUCK_REG_MODE_VSYS 0
> +
> +#define SMBB_BAT_PRES_STATUS 0x208
> +#define PRES_STATUS_BAT_PRES BIT(7)
> +#define SMBB_BAT_TEMP_STATUS 0x209
> +#define TEMP_STATUS_OK BIT(7)
> +#define TEMP_STATUS_HOT BIT(6)
> +#define SMBB_BAT_BTC_CTRL 0x249
> +#define BTC_CTRL_COMP_EN BIT(7)
> +#define BTC_CTRL_COLD_EXT BIT(1)
> +#define BTC_CTRL_HOT_EXT_N BIT(0)
> +
> +#define SMBB_USB_IMAX 0x344
> +#define SMBB_USB_ENUM_TIMER_STOP 0x34e
> +#define ENUM_TIMER_STOP BIT(0)
> +#define SMBB_USB_SEC_ACCESS 0x3d0
> +#define SEC_ACCESS_MAGIC 0xa5
> +#define SMBB_USB_REV_BST 0x3ed
> +#define REV_BST_CHG_GONE BIT(7)
> +
> +#define SMBB_DC_IMAX 0x444
> +
> +#define SMBB_MISC_REV2 0x601
> +#define SMBB_MISC_BOOT_DONE 0x642
> +#define BOOT_DONE BIT(7)
> +
> +#define STATUS_USBIN_VALID BIT(0) /* USB connection is valid */
> +#define STATUS_DCIN_VALID BIT(1) /* DC connection is valid */
> +#define STATUS_BAT_HOT BIT(2) /* Battery temp 1=Hot, 0=Cold */
> +#define STATUS_BAT_OK BIT(3) /* Battery temp OK */
> +#define STATUS_BAT_PRESENT BIT(4) /* Battery is present */
> +#define STATUS_CHG_DONE BIT(5) /* Charge cycle is complete */
> +#define STATUS_CHG_TRKL BIT(6) /* Trickle charging */
> +#define STATUS_CHG_FAST BIT(7) /* Fast charging */
> +#define STATUS_CHG_GONE BIT(8) /* No charger is connected */
> +
> +enum smbb_attr {
> + ATTR_BAT_ISAFE,
> + ATTR_BAT_IMAX,
> + ATTR_USBIN_IMAX,
> + ATTR_DCIN_IMAX,
> + ATTR_BAT_VSAFE,
> + ATTR_BAT_VMAX,
> + ATTR_BAT_VMIN,
> + ATTR_CHG_VDET,
> + ATTR_VIN_MIN,
> + _ATTR_CNT,
> +};
> +
> +struct smbb_charger {
> + unsigned int revision;
> + unsigned int addr;
> + struct device *dev;
> +
> + bool dc_disabled;
> + bool jeita_ext_temp;
> + unsigned long status;
> + struct mutex statlock;
> +
> + unsigned int attr[_ATTR_CNT];
> +
> + struct power_supply *usb_psy;
> + struct power_supply *dc_psy;
> + struct power_supply *bat_psy;
> + struct regmap *regmap;
> +};
> +
> +static int smbb_vbat_weak_fn(unsigned int index)
> +{
> + return 2100000 + index * 100000;
> +}
> +
> +static int smbb_vin_fn(unsigned int index)
> +{
> + if (index > 42)
> + return 5600000 + (index - 43) * 200000;
> + return 3400000 + index * 50000;
> +}
> +
> +static int smbb_vmax_fn(unsigned int index)
> +{
> + return 3240000 + index * 10000;
> +}
> +
> +static int smbb_vbat_det_fn(unsigned int index)
> +{
> + return 3240000 + index * 20000;
> +}
> +
> +static int smbb_imax_fn(unsigned int index)
> +{
> + if (index < 2)
> + return 100000 + index * 50000;
> + return index * 100000;
> +}
> +
> +static int smbb_bat_imax_fn(unsigned int index)
> +{
> + return index * 50000;
> +}
> +
> +static unsigned int smbb_hw_lookup(unsigned int val, int (*fn)(unsigned int))
> +{
> + unsigned int widx;
> + unsigned int sel;
> +
> + for (widx = sel = 0; (*fn)(widx) <= val; ++widx)
> + sel = widx;
> +
> + return sel;
> +}
> +
> +static const struct smbb_charger_attr {
> + const char *name;
> + unsigned int reg;
> + unsigned int safe_reg;
> + unsigned int max;
> + unsigned int min;
> + unsigned int fail_ok;
> + int (*hw_fn)(unsigned int);
> +} smbb_charger_attrs[] = {
> + [ATTR_BAT_ISAFE] = {
> + .name = "qcom,fast-charge-safe-current",
> + .reg = SMBB_CHG_ISAFE,
> + .max = 3000000,
> + .min = 200000,
> + .hw_fn = smbb_bat_imax_fn,
> + .fail_ok = 1,
> + },
> + [ATTR_BAT_IMAX] = {
> + .name = "qcom,fast-charge-current-limit",
> + .reg = SMBB_CHG_IMAX,
> + .safe_reg = SMBB_CHG_ISAFE,
> + .max = 3000000,
> + .min = 200000,
> + .hw_fn = smbb_bat_imax_fn,
> + },
> + [ATTR_DCIN_IMAX] = {
> + .name = "qcom,dc-current-limit",
> + .reg = SMBB_DC_IMAX,
> + .max = 2500000,
> + .min = 100000,
> + .hw_fn = smbb_imax_fn,
> + },
> + [ATTR_BAT_VSAFE] = {
> + .name = "qcom,fast-charge-safe-voltage",
> + .reg = SMBB_CHG_VSAFE,
> + .max = 5000000,
> + .min = 3240000,
> + .hw_fn = smbb_vmax_fn,
> + .fail_ok = 1,
> + },
> + [ATTR_BAT_VMAX] = {
> + .name = "qcom,fast-charge-high-threshold-voltage",
> + .reg = SMBB_CHG_VMAX,
> + .safe_reg = SMBB_CHG_VSAFE,
> + .max = 5000000,
> + .min = 3240000,
> + .hw_fn = smbb_vmax_fn,
> + },
> + [ATTR_BAT_VMIN] = {
> + .name = "qcom,fast-charge-low-threshold-voltage",
> + .reg = SMBB_CHG_VBAT_WEAK,
> + .max = 3600000,
> + .min = 2100000,
> + .hw_fn = smbb_vbat_weak_fn,
> + },
> + [ATTR_CHG_VDET] = {
> + .name = "qcom,auto-recharge-threshold-voltage",
> + .reg = SMBB_CHG_VBAT_DET,
> + .max = 5000000,
> + .min = 3240000,
> + .hw_fn = smbb_vbat_det_fn,
> + },
> + [ATTR_VIN_MIN] = {
> + .name = "qcom,minimum-input-voltage",
> + .reg = SMBB_CHG_VIN_MIN,
> + .max = 9600000,
> + .min = 4200000,
> + .hw_fn = smbb_vin_fn,
> + },
> + [ATTR_USBIN_IMAX] = {
> + .name = "usb-charge-current-limit",
> + .reg = SMBB_USB_IMAX,
> + .max = 2500000,
> + .min = 100000,
> + .hw_fn = smbb_imax_fn,
> + },
> +};
> +
> +static int smbb_charger_attr_write(struct smbb_charger *chg,
> + enum smbb_attr which, unsigned int val)
> +{
> + const struct smbb_charger_attr *prop;
> + unsigned int wval;
> + unsigned int out;
> + int rc;
> +
> + prop = &smbb_charger_attrs[which];
> +
> + if (val > prop->max || val < prop->min) {
> + dev_err(chg->dev, "value out of range for %s [%u:%u]\n",
> + prop->name, prop->min, prop->max);
> + return -EINVAL;
> + }
> +
> + if (prop->safe_reg) {
> + rc = regmap_read(chg->regmap,
> + chg->addr + prop->safe_reg, &wval);
> + if (rc) {
> + dev_err(chg->dev,
> + "unable to read safe value for '%s'\n",
> + prop->name);
> + return rc;
> + }
> +
> + wval = prop->hw_fn(wval);
> +
> + if (val > wval) {
> + dev_warn(chg->dev,
> + "%s above safe value, clamping at %u\n",
> + prop->name, wval);
> + val = wval;
> + }
> + }
> +
> + wval = smbb_hw_lookup(val, prop->hw_fn);
> +
> + rc = regmap_write(chg->regmap, chg->addr + prop->reg, wval);
> + if (rc) {
> + dev_err(chg->dev, "unable to update %s", prop->name);
> + return rc;
> + }
> + out = prop->hw_fn(wval);
> + if (out != val) {
> + dev_warn(chg->dev,
> + "%s inaccurate, rounded to %u\n",
> + prop->name, out);
> + }
> +
> + dev_dbg(chg->dev, "%s <= %d\n", prop->name, out);
> +
> + chg->attr[which] = out;
> +
> + return 0;
> +}
> +
> +static int smbb_charger_attr_read(struct smbb_charger *chg,
> + enum smbb_attr which)
> +{
> + const struct smbb_charger_attr *prop;
> + unsigned int val;
> + int rc;
> +
> + prop = &smbb_charger_attrs[which];
> +
> + rc = regmap_read(chg->regmap, chg->addr + prop->reg, &val);
> + if (rc) {
> + dev_err(chg->dev, "failed to read %s\n", prop->name);
> + return rc;
> + }
> + val = prop->hw_fn(val);
> + dev_dbg(chg->dev, "%s => %d\n", prop->name, val);
> +
> + chg->attr[which] = val;
> +
> + return 0;
> +}
> +
> +static int smbb_charger_attr_parse(struct smbb_charger *chg,
> + enum smbb_attr which)
> +{
> + const struct smbb_charger_attr *prop;
> + unsigned int val;
> + int rc;
> +
> + prop = &smbb_charger_attrs[which];
> +
> + rc = of_property_read_u32(chg->dev->of_node, prop->name, &val);
> + if (rc == 0) {
> + rc = smbb_charger_attr_write(chg, which, val);
> + if (!rc || !prop->fail_ok)
> + return rc;
> + }
> + return smbb_charger_attr_read(chg, which);
> +}
> +
> +static void smbb_set_line_flag(struct smbb_charger *chg, int irq, int flag)
> +{
> + bool state;
> + int ret;
> +
> + ret = irq_get_irqchip_state(irq, IRQCHIP_STATE_LINE_LEVEL, &state);
> + if (state < 0) {
> + dev_err(chg->dev, "failed to read irq line\n");
> + return;
> + }
> +
> + mutex_lock(&chg->statlock);
> + if (state)
> + chg->status |= flag;
> + else
> + chg->status &= ~flag;
> + mutex_unlock(&chg->statlock);
> +
> + dev_dbg(chg->dev, "status = %03lx\n", chg->status);
> +}
> +
> +static irqreturn_t smbb_usb_valid_handler(int irq, void *_data)
> +{
> + struct smbb_charger *chg = _data;
> +
> + smbb_set_line_flag(chg, irq, STATUS_USBIN_VALID);
> + power_supply_changed(chg->usb_psy);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t smbb_dc_valid_handler(int irq, void *_data)
> +{
> + struct smbb_charger *chg = _data;
> +
> + smbb_set_line_flag(chg, irq, STATUS_DCIN_VALID);
> + if (!chg->dc_disabled)
> + power_supply_changed(chg->dc_psy);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t smbb_bat_temp_handler(int irq, void *_data)
> +{
> + struct smbb_charger *chg = _data;
> + unsigned int val;
> + int rc;
> +
> + rc = regmap_read(chg->regmap, chg->addr + SMBB_BAT_TEMP_STATUS, &val);
> + if (rc)
> + return IRQ_HANDLED;
> +
> + mutex_lock(&chg->statlock);
> + if (val & TEMP_STATUS_OK) {
> + chg->status |= STATUS_BAT_OK;
> + } else {
> + chg->status &= ~STATUS_BAT_OK;
> + if (val & TEMP_STATUS_HOT)
> + chg->status |= STATUS_BAT_HOT;
> + }
> + mutex_unlock(&chg->statlock);
> +
> + power_supply_changed(chg->bat_psy);
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t smbb_bat_present_handler(int irq, void *_data)
> +{
> + struct smbb_charger *chg = _data;
> +
> + smbb_set_line_flag(chg, irq, STATUS_BAT_PRESENT);
> + power_supply_changed(chg->bat_psy);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t smbb_chg_done_handler(int irq, void *_data)
> +{
> + struct smbb_charger *chg = _data;
> +
> + smbb_set_line_flag(chg, irq, STATUS_CHG_DONE);
> + power_supply_changed(chg->bat_psy);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t smbb_chg_gone_handler(int irq, void *_data)
> +{
> + struct smbb_charger *chg = _data;
> +
> + smbb_set_line_flag(chg, irq, STATUS_CHG_GONE);
> + power_supply_changed(chg->bat_psy);
> + power_supply_changed(chg->usb_psy);
> + if (!chg->dc_disabled)
> + power_supply_changed(chg->dc_psy);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t smbb_chg_fast_handler(int irq, void *_data)
> +{
> + struct smbb_charger *chg = _data;
> +
> + smbb_set_line_flag(chg, irq, STATUS_CHG_FAST);
> + power_supply_changed(chg->bat_psy);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static irqreturn_t smbb_chg_trkl_handler(int irq, void *_data)
> +{
> + struct smbb_charger *chg = _data;
> +
> + smbb_set_line_flag(chg, irq, STATUS_CHG_TRKL);
> + power_supply_changed(chg->bat_psy);
> +
> + return IRQ_HANDLED;
> +}
> +
> +static const struct smbb_irq {
> + const char *name;
> + irqreturn_t (*handler)(int, void *);
> +} smbb_charger_irqs[] = {
> + { "chg-done", smbb_chg_done_handler },
> + { "chg-fast", smbb_chg_fast_handler },
> + { "chg-trkl", smbb_chg_trkl_handler },
> + { "bat-temp-ok", smbb_bat_temp_handler },
> + { "bat-present", smbb_bat_present_handler },
> + { "chg-gone", smbb_chg_gone_handler },
> + { "usb-valid", smbb_usb_valid_handler },
> + { "dc-valid", smbb_dc_valid_handler },
> +};
> +
> +static int smbb_usbin_get_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct smbb_charger *chg = power_supply_get_drvdata(psy);
> + int rc = 0;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + mutex_lock(&chg->statlock);
> + val->intval = !(chg->status & STATUS_CHG_GONE) &&
> + (chg->status & STATUS_USBIN_VALID);
> + mutex_unlock(&chg->statlock);
> + break;
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
> + val->intval = chg->attr[ATTR_USBIN_IMAX];
> + break;
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
> + val->intval = 2500000;
> + break;
> + default:
> + rc = -EINVAL;
> + break;
> + }
> +
> + return rc;
> +}
> +
> +static int smbb_usbin_set_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + const union power_supply_propval *val)
> +{
> + struct smbb_charger *chg = power_supply_get_drvdata(psy);
> + int rc;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
> + rc = smbb_charger_attr_write(chg, ATTR_USBIN_IMAX,
> + val->intval);
> + break;
> + default:
> + rc = -EINVAL;
> + break;
> + }
> +
> + return rc;
> +}
> +
> +static int smbb_dcin_get_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct smbb_charger *chg = power_supply_get_drvdata(psy);
> + int rc = 0;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_ONLINE:
> + mutex_lock(&chg->statlock);
> + val->intval = !(chg->status & STATUS_CHG_GONE) &&
> + (chg->status & STATUS_DCIN_VALID);
> + mutex_unlock(&chg->statlock);
> + break;
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
> + val->intval = chg->attr[ATTR_DCIN_IMAX];
> + break;
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX:
> + val->intval = 2500000;
> + break;
> + default:
> + rc = -EINVAL;
> + break;
> + }
> +
> + return rc;
> +}
> +
> +static int smbb_dcin_set_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + const union power_supply_propval *val)
> +{
> + struct smbb_charger *chg = power_supply_get_drvdata(psy);
> + int rc;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT:
> + rc = smbb_charger_attr_write(chg, ATTR_DCIN_IMAX,
> + val->intval);
> + break;
> + default:
> + rc = -EINVAL;
> + break;
> + }
> +
> + return rc;
> +}
> +
> +static int smbb_charger_writable_property(struct power_supply *psy,
> + enum power_supply_property psp)
> +{
> + return psp == POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT;
> +}
> +
> +static int smbb_battery_get_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + union power_supply_propval *val)
> +{
> + struct smbb_charger *chg = power_supply_get_drvdata(psy);
> + unsigned long status;
> + int rc = 0;
> +
> + mutex_lock(&chg->statlock);
> + status = chg->status;
> + mutex_unlock(&chg->statlock);
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_STATUS:
> + if (status & STATUS_CHG_GONE)
> + val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
> + else if (!(status & (STATUS_DCIN_VALID | STATUS_USBIN_VALID)))
> + val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
> + else if (status & STATUS_CHG_DONE)
> + val->intval = POWER_SUPPLY_STATUS_FULL;
> + else if (!(status & STATUS_BAT_OK))
> + val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
> + else if (status & (STATUS_CHG_FAST | STATUS_CHG_TRKL))
> + val->intval = POWER_SUPPLY_STATUS_CHARGING;
> + else /* everything is ok for charging, but we are not... */
> + val->intval = POWER_SUPPLY_STATUS_DISCHARGING;
> + break;
> + case POWER_SUPPLY_PROP_HEALTH:
> + if (status & STATUS_BAT_OK)
> + val->intval = POWER_SUPPLY_HEALTH_GOOD;
> + else if (status & STATUS_BAT_HOT)
> + val->intval = POWER_SUPPLY_HEALTH_OVERHEAT;
> + else
> + val->intval = POWER_SUPPLY_HEALTH_COLD;
> + break;
> + case POWER_SUPPLY_PROP_CHARGE_TYPE:
> + if (status & STATUS_CHG_FAST)
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_FAST;
> + else if (status & STATUS_CHG_TRKL)
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_TRICKLE;
> + else
> + val->intval = POWER_SUPPLY_CHARGE_TYPE_NONE;
> + break;
> + case POWER_SUPPLY_PROP_PRESENT:
> + val->intval = !!(status & STATUS_BAT_PRESENT);
> + break;
> + case POWER_SUPPLY_PROP_CURRENT_MAX:
> + val->intval = chg->attr[ATTR_BAT_IMAX];
> + break;
> + case POWER_SUPPLY_PROP_VOLTAGE_MAX:
> + val->intval = chg->attr[ATTR_BAT_VMAX];
> + break;
> + case POWER_SUPPLY_PROP_TECHNOLOGY:
> + /* this charger is a single-cell lithium-ion battery charger
> + * only. If you hook up some other technology, there will be
> + * fireworks.
> + */
> + val->intval = POWER_SUPPLY_TECHNOLOGY_LION;
> + break;
> + case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
> + val->intval = 3000000; /* single-cell li-ion low end */
> + break;
> + default:
> + rc = -EINVAL;
> + break;
> + }
> +
> + return rc;
> +}
> +
> +static int smbb_battery_set_property(struct power_supply *psy,
> + enum power_supply_property psp,
> + const union power_supply_propval *val)
> +{
> + struct smbb_charger *chg = power_supply_get_drvdata(psy);
> + int rc;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_CURRENT_MAX:
> + rc = smbb_charger_attr_write(chg, ATTR_BAT_IMAX, val->intval);
> + break;
> + case POWER_SUPPLY_PROP_VOLTAGE_MAX:
> + rc = smbb_charger_attr_write(chg, ATTR_BAT_VMAX, val->intval);
> + break;
> + default:
> + rc = -EINVAL;
> + break;
> + }
> +
> + return rc;
> +}
> +
> +static int smbb_battery_writable_property(struct power_supply *psy,
> + enum power_supply_property psp)
> +{
> + switch (psp) {
> + case POWER_SUPPLY_PROP_CURRENT_MAX:
> + case POWER_SUPPLY_PROP_VOLTAGE_MAX:
> + return 1;
> + default:
> + return 0;
> + }
> +}
> +
> +static enum power_supply_property smbb_charger_properties[] = {
> + POWER_SUPPLY_PROP_ONLINE,
> + POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT,
> + POWER_SUPPLY_PROP_CHARGE_CONTROL_LIMIT_MAX,
> +};
> +
> +static enum power_supply_property smbb_battery_properties[] = {
> + POWER_SUPPLY_PROP_STATUS,
> + POWER_SUPPLY_PROP_HEALTH,
> + POWER_SUPPLY_PROP_PRESENT,
> + POWER_SUPPLY_PROP_CHARGE_TYPE,
> + POWER_SUPPLY_PROP_CURRENT_MAX,
> + POWER_SUPPLY_PROP_VOLTAGE_MAX,
> + POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
> + POWER_SUPPLY_PROP_TECHNOLOGY,
> +};
> +
> +static const struct reg_off_mask_default {
> + unsigned int offset;
> + unsigned int mask;
> + unsigned int value;
> + unsigned int rev_mask;
> +} smbb_charger_setup[] = {
> + /* The bootloader is supposed to set this... make sure anyway. */
> + { SMBB_MISC_BOOT_DONE, BOOT_DONE, BOOT_DONE },
> +
> + /* Disable software timer */
> + { SMBB_CHG_TCHG_MAX_EN, TCHG_MAX_EN, 0 },
> +
> + /* Clear and disable watchdog */
> + { SMBB_CHG_WDOG_TIME, 0xff, 160 },
> + { SMBB_CHG_WDOG_EN, WDOG_EN, 0 },
> +
> + /* Use charger based EoC detection */
> + { SMBB_CHG_IBAT_TERM_CHG, IBAT_TERM_CHG_IEOC, IBAT_TERM_CHG_IEOC_CHG },
> +
> + /* Disable GSM PA load adjustment.
> + * The PA signal is incorrectly connected on v2.
> + */
> + { SMBB_CHG_CFG, 0xff, 0x00, BIT(3) },
> +
> + /* Use VBAT (not VSYS) to compensate for IR drop during fast charging */
> + { SMBB_BUCK_REG_MODE, BUCK_REG_MODE, BUCK_REG_MODE_VBAT },
> +
> + /* Enable battery temperature comparators */
> + { SMBB_BAT_BTC_CTRL, BTC_CTRL_COMP_EN, BTC_CTRL_COMP_EN },
> +
> + /* Stop USB enumeration timer */
> + { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP },
> +
> +#if 0 /* FIXME supposedly only to disable hardware ARB termination */
> + { SMBB_USB_SEC_ACCESS, SEC_ACCESS_MAGIC },
> + { SMBB_USB_REV_BST, 0xff, REV_BST_CHG_GONE },
> +#endif
> +
> + /* Stop USB enumeration timer, again */
> + { SMBB_USB_ENUM_TIMER_STOP, ENUM_TIMER_STOP, ENUM_TIMER_STOP },
> +
> + /* Enable charging */
> + { SMBB_CHG_CTRL, CTRL_EN, CTRL_EN },
> +};
> +
> +static char *smbb_bif[] = { "smbb-bif" };
> +
> +static const struct power_supply_desc bat_psy_desc = {
> + .name = "smbb-bif",
> + .type = POWER_SUPPLY_TYPE_BATTERY,
> + .properties = smbb_battery_properties,
> + .num_properties = ARRAY_SIZE(smbb_battery_properties),
> + .get_property = smbb_battery_get_property,
> + .set_property = smbb_battery_set_property,
> + .property_is_writeable = smbb_battery_writable_property,
> +};
> +
> +static const struct power_supply_desc usb_psy_desc = {
> + .name = "smbb-usbin",
> + .type = POWER_SUPPLY_TYPE_USB,
> + .properties = smbb_charger_properties,
> + .num_properties = ARRAY_SIZE(smbb_charger_properties),
> + .get_property = smbb_usbin_get_property,
> + .set_property = smbb_usbin_set_property,
> + .property_is_writeable = smbb_charger_writable_property,
> +};
> +
> +static const struct power_supply_desc dc_psy_desc = {
> + .name = "smbb-dcin",
> + .type = POWER_SUPPLY_TYPE_MAINS,
> + .properties = smbb_charger_properties,
> + .num_properties = ARRAY_SIZE(smbb_charger_properties),
> + .get_property = smbb_dcin_get_property,
> + .set_property = smbb_dcin_set_property,
> + .property_is_writeable = smbb_charger_writable_property,
> +};
> +
> +static int smbb_charger_probe(struct platform_device *pdev)
> +{
> + struct power_supply_config bat_cfg = {};
> + struct power_supply_config usb_cfg = {};
> + struct power_supply_config dc_cfg = {};
> + struct smbb_charger *chg;
> + int rc, i;
> +
> + chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
> + if (!chg)
> + return -ENOMEM;
> +
> + chg->dev = &pdev->dev;
> + mutex_init(&chg->statlock);
> +
> + chg->regmap = dev_get_regmap(pdev->dev.parent, NULL);
> + if (!chg->regmap) {
> + dev_err(&pdev->dev, "failed to locate regmap\n");
> + return -ENODEV;
> + }
> +
> + rc = of_property_read_u32(pdev->dev.of_node, "reg", &chg->addr);
> + if (rc) {
> + dev_err(&pdev->dev, "missing or invalid 'reg' property\n");
> + return rc;
> + }
> +
> + rc = regmap_read(chg->regmap, chg->addr + SMBB_MISC_REV2, &chg->revision);
> + if (rc) {
> + dev_err(&pdev->dev, "unable to read revision\n");
> + return rc;
> + }
> +
> + chg->revision += 1;
> + if (chg->revision != 2 && chg->revision != 3) {
> + dev_err(&pdev->dev, "v1 hardware not supported\n");
> + return -ENODEV;
> + }
> + dev_info(&pdev->dev, "Initializing SMBB rev %u", chg->revision);
> +
> + chg->dc_disabled = of_property_read_bool(pdev->dev.of_node, "qcom,disable-dc");
> +
> + for (i = 0; i < _ATTR_CNT; ++i) {
> + rc = smbb_charger_attr_parse(chg, i);
> + if (rc) {
> + dev_err(&pdev->dev, "failed to parse/apply settings\n");
> + return rc;
> + }
> + }
> +
> + bat_cfg.drv_data = chg;
> + bat_cfg.of_node = pdev->dev.of_node;
> + chg->bat_psy = devm_power_supply_register(&pdev->dev,
> + &bat_psy_desc,
> + &bat_cfg);
> + if (IS_ERR(chg->bat_psy)) {
> + dev_err(&pdev->dev, "failed to register battery\n");
> + return PTR_ERR(chg->bat_psy);
> + }
> +
> + usb_cfg.drv_data = chg;
> + usb_cfg.supplied_to = smbb_bif;
> + usb_cfg.num_supplicants = ARRAY_SIZE(smbb_bif);
> + chg->usb_psy = devm_power_supply_register(&pdev->dev,
> + &usb_psy_desc,
> + &usb_cfg);
> + if (IS_ERR(chg->usb_psy)) {
> + dev_err(&pdev->dev, "failed to register USB power supply\n");
> + return PTR_ERR(chg->usb_psy);
> + }
> +
> + if (!chg->dc_disabled) {
> + dc_cfg.drv_data = chg;
> + dc_cfg.supplied_to = smbb_bif;
> + dc_cfg.num_supplicants = ARRAY_SIZE(smbb_bif);
> + chg->dc_psy = devm_power_supply_register(&pdev->dev,
> + &dc_psy_desc,
> + &dc_cfg);
> + if (IS_ERR(chg->dc_psy)) {
> + dev_err(&pdev->dev, "failed to register DC power supply\n");
> + return PTR_ERR(chg->dc_psy);
> + }
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(smbb_charger_irqs); ++i) {
> + int irq;
> +
> + irq = platform_get_irq_byname(pdev, smbb_charger_irqs[i].name);
> + if (irq < 0) {
> + dev_err(&pdev->dev, "failed to get irq '%s'\n",
> + smbb_charger_irqs[i].name);
> + return irq;
> + }
> +
> + smbb_charger_irqs[i].handler(irq, chg);
> +
> + rc = devm_request_threaded_irq(&pdev->dev, irq, NULL,
> + smbb_charger_irqs[i].handler, IRQF_ONESHOT,
> + smbb_charger_irqs[i].name, chg);
> + if (rc) {
> + dev_err(&pdev->dev, "failed to request irq '%s'\n",
> + smbb_charger_irqs[i].name);
> + return rc;
> + }
> + }
> +
> + chg->jeita_ext_temp = of_property_read_bool(pdev->dev.of_node,
> + "qcom,jeita-extended-temp-range");
> +
> + /* Set temperature range to [35%:70%] or [25%:80%] accordingly */
> + rc = regmap_update_bits(chg->regmap, chg->addr + SMBB_BAT_BTC_CTRL,
> + BTC_CTRL_COLD_EXT | BTC_CTRL_HOT_EXT_N,
> + chg->jeita_ext_temp ?
> + BTC_CTRL_COLD_EXT :
> + BTC_CTRL_HOT_EXT_N);
> + if (rc) {
> + dev_err(&pdev->dev,
> + "unable to set %s temperature range\n",
> + chg->jeita_ext_temp ? "JEITA extended" : "normal");
> + return rc;
> + }
> +
> + for (i = 0; i < ARRAY_SIZE(smbb_charger_setup); ++i) {
> + const struct reg_off_mask_default *r = &smbb_charger_setup[i];
> +
> + if (r->rev_mask & BIT(chg->revision))
> + continue;
> +
> + rc = regmap_update_bits(chg->regmap, chg->addr + r->offset,
> + r->mask, r->value);
> + if (rc) {
> + dev_err(&pdev->dev,
> + "unable to initializing charging, bailing\n");
> + return rc;
> + }
> + }
> +
> + platform_set_drvdata(pdev, chg);
> +
> + return 0;
> +}
> +
> +static int smbb_charger_remove(struct platform_device *pdev)
> +{
> + struct smbb_charger *chg;
> +
> + chg = platform_get_drvdata(pdev);
> +
> + regmap_update_bits(chg->regmap, chg->addr + SMBB_CHG_CTRL, CTRL_EN, 0);
> +
> + return 0;
> +}
> +
> +static const struct of_device_id smbb_charger_id_table[] = {
> + { .compatible = "qcom,pm8941-charger" },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, smbb_charger_id_table);
> +
> +static struct platform_driver smbb_charger_driver = {
> + .probe = smbb_charger_probe,
> + .remove = smbb_charger_remove,
> + .driver = {
> + .name = "qcom-smbb",
> + .of_match_table = smbb_charger_id_table,
> + },
> +};
> +module_platform_driver(smbb_charger_driver);
> +
> +MODULE_DESCRIPTION("Qualcomm Switch-Mode Battery Charger and Boost driver");
> +MODULE_LICENSE("GPL v2");
> --
> 1.8.2.2
>
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