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-rw-r--r--drivers/power/Kconfig7
-rw-r--r--drivers/power/Makefile1
-rw-r--r--drivers/power/bq2415x_charger.c121
-rw-r--r--drivers/power/charger-manager.c299
-rw-r--r--drivers/power/gpio-charger.c19
-rw-r--r--drivers/power/isp1704_charger.c54
-rw-r--r--drivers/power/max14577_charger.c311
-rw-r--r--drivers/power/max17042_battery.c6
-rw-r--r--drivers/power/power_supply_core.c44
-rw-r--r--drivers/power/reset/Kconfig6
-rw-r--r--drivers/power/reset/Makefile1
-rw-r--r--drivers/power/reset/as3722-poweroff.c96
12 files changed, 890 insertions, 75 deletions
diff --git a/drivers/power/Kconfig b/drivers/power/Kconfig
index 32c6294c1668..ba6975123071 100644
--- a/drivers/power/Kconfig
+++ b/drivers/power/Kconfig
@@ -317,6 +317,13 @@ config CHARGER_MANAGER
runtime and in suspend-to-RAM by waking up the system periodically
with help of suspend_again support.
+config CHARGER_MAX14577
+ tristate "Maxim MAX14577 MUIC battery charger driver"
+ depends on MFD_MAX14577
+ help
+ Say Y to enable support for the battery charger control sysfs and
+ platform data of MAX14577 MUICs.
+
config CHARGER_MAX8997
tristate "Maxim MAX8997/MAX8966 PMIC battery charger driver"
depends on MFD_MAX8997 && REGULATOR_MAX8997
diff --git a/drivers/power/Makefile b/drivers/power/Makefile
index 372b4e8ab598..ee54a3e4c90a 100644
--- a/drivers/power/Makefile
+++ b/drivers/power/Makefile
@@ -48,6 +48,7 @@ obj-$(CONFIG_CHARGER_LP8727) += lp8727_charger.o
obj-$(CONFIG_CHARGER_LP8788) += lp8788-charger.o
obj-$(CONFIG_CHARGER_GPIO) += gpio-charger.o
obj-$(CONFIG_CHARGER_MANAGER) += charger-manager.o
+obj-$(CONFIG_CHARGER_MAX14577) += max14577_charger.o
obj-$(CONFIG_CHARGER_MAX8997) += max8997_charger.o
obj-$(CONFIG_CHARGER_MAX8998) += max8998_charger.o
obj-$(CONFIG_CHARGER_BQ2415X) += bq2415x_charger.o
diff --git a/drivers/power/bq2415x_charger.c b/drivers/power/bq2415x_charger.c
index df893dd1447d..79a37f6d3307 100644
--- a/drivers/power/bq2415x_charger.c
+++ b/drivers/power/bq2415x_charger.c
@@ -1,7 +1,7 @@
/*
* bq2415x charger driver
*
- * Copyright (C) 2011-2012 Pali Rohár <pali.rohar@gmail.com>
+ * Copyright (C) 2011-2013 Pali Rohár <pali.rohar@gmail.com>
*
* 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
@@ -170,6 +170,8 @@ struct bq2415x_device {
struct bq2415x_platform_data init_data;
struct power_supply charger;
struct delayed_work work;
+ struct power_supply *notify_psy;
+ struct notifier_block nb;
enum bq2415x_mode reported_mode;/* mode reported by hook function */
enum bq2415x_mode mode; /* current configured mode */
enum bq2415x_chip chip;
@@ -795,24 +797,53 @@ static int bq2415x_set_mode(struct bq2415x_device *bq, enum bq2415x_mode mode)
}
-/* hook function called by other driver which set reported mode */
-static void bq2415x_hook_function(enum bq2415x_mode mode, void *data)
+static int bq2415x_notifier_call(struct notifier_block *nb,
+ unsigned long val, void *v)
{
- struct bq2415x_device *bq = data;
+ struct bq2415x_device *bq =
+ container_of(nb, struct bq2415x_device, nb);
+ struct power_supply *psy = v;
+ enum bq2415x_mode mode;
+ union power_supply_propval prop;
+ int ret;
+ int mA;
- if (!bq)
- return;
+ if (val != PSY_EVENT_PROP_CHANGED)
+ return NOTIFY_OK;
+
+ if (psy != bq->notify_psy)
+ return NOTIFY_OK;
+
+ dev_dbg(bq->dev, "notifier call was called\n");
+
+ ret = psy->get_property(psy, POWER_SUPPLY_PROP_CURRENT_MAX, &prop);
+ if (ret != 0)
+ return NOTIFY_OK;
+
+ mA = prop.intval;
+
+ if (mA == 0)
+ mode = BQ2415X_MODE_OFF;
+ else if (mA < 500)
+ mode = BQ2415X_MODE_NONE;
+ else if (mA < 1800)
+ mode = BQ2415X_MODE_HOST_CHARGER;
+ else
+ mode = BQ2415X_MODE_DEDICATED_CHARGER;
+
+ if (bq->reported_mode == mode)
+ return NOTIFY_OK;
- dev_dbg(bq->dev, "hook function was called\n");
bq->reported_mode = mode;
/* if automode is not enabled do not tell about reported_mode */
if (bq->automode < 1)
- return;
+ return NOTIFY_OK;
sysfs_notify(&bq->charger.dev->kobj, NULL, "reported_mode");
bq2415x_set_mode(bq, bq->reported_mode);
+ return NOTIFY_OK;
}
/**** timer functions ****/
@@ -1512,9 +1543,11 @@ static int bq2415x_probe(struct i2c_client *client,
int num;
char *name;
struct bq2415x_device *bq;
+ struct device_node *np = client->dev.of_node;
+ struct bq2415x_platform_data *pdata = client->dev.platform_data;
- if (!client->dev.platform_data) {
- dev_err(&client->dev, "platform data not set\n");
+ if (!np && !pdata) {
+ dev_err(&client->dev, "platform data missing\n");
return -ENODEV;
}
@@ -1539,6 +1572,17 @@ static int bq2415x_probe(struct i2c_client *client,
goto error_2;
}
+ if (np) {
+ bq->notify_psy = power_supply_get_by_phandle(np, "ti,usb-charger-detection");
+
+ if (!bq->notify_psy)
+ return -EPROBE_DEFER;
+ }
+ else if (pdata->notify_device)
+ bq->notify_psy = power_supply_get_by_name(pdata->notify_device);
+ else
+ bq->notify_psy = NULL;
+
i2c_set_clientdata(client, bq);
bq->id = num;
@@ -1550,8 +1594,34 @@ static int bq2415x_probe(struct i2c_client *client,
bq->autotimer = 0;
bq->automode = 0;
- memcpy(&bq->init_data, client->dev.platform_data,
- sizeof(bq->init_data));
+ if (np) {
+ ret = of_property_read_u32(np, "ti,current-limit",
+ &bq->init_data.current_limit);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,weak-battery-voltage",
+ &bq->init_data.weak_battery_voltage);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,battery-regulation-voltage",
+ &bq->init_data.battery_regulation_voltage);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,charge-current",
+ &bq->init_data.charge_current);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,termination-current",
+ &bq->init_data.termination_current);
+ if (ret)
+ return ret;
+ ret = of_property_read_u32(np, "ti,resistor-sense",
+ &bq->init_data.resistor_sense);
+ if (ret)
+ return ret;
+ } else {
+ memcpy(&bq->init_data, pdata, sizeof(bq->init_data));
+ }
bq2415x_reset_chip(bq);
@@ -1573,16 +1643,20 @@ static int bq2415x_probe(struct i2c_client *client,
goto error_4;
}
- if (bq->init_data.set_mode_hook) {
- if (bq->init_data.set_mode_hook(
- bq2415x_hook_function, bq)) {
- bq->automode = 1;
- bq2415x_set_mode(bq, bq->reported_mode);
- dev_info(bq->dev, "automode enabled\n");
- } else {
- bq->automode = -1;
- dev_info(bq->dev, "automode failed\n");
+ if (bq->notify_psy) {
+ bq->nb.notifier_call = bq2415x_notifier_call;
+ ret = power_supply_reg_notifier(&bq->nb);
+ if (ret) {
+ dev_err(bq->dev, "failed to reg notifier: %d\n", ret);
+ goto error_5;
}
+
+ /* Query for initial reported_mode and set it */
+ bq2415x_notifier_call(&bq->nb, PSY_EVENT_PROP_CHANGED, bq->notify_psy);
+ bq2415x_set_mode(bq, bq->reported_mode);
+
+ bq->automode = 1;
+ dev_info(bq->dev, "automode enabled\n");
} else {
bq->automode = -1;
dev_info(bq->dev, "automode not supported\n");
@@ -1594,6 +1668,7 @@ static int bq2415x_probe(struct i2c_client *client,
dev_info(bq->dev, "driver registered\n");
return 0;
+error_5:
error_4:
bq2415x_sysfs_exit(bq);
error_3:
@@ -1614,8 +1689,8 @@ static int bq2415x_remove(struct i2c_client *client)
{
struct bq2415x_device *bq = i2c_get_clientdata(client);
- if (bq->init_data.set_mode_hook)
- bq->init_data.set_mode_hook(NULL, NULL);
+ if (bq->notify_psy)
+ power_supply_unreg_notifier(&bq->nb);
bq2415x_sysfs_exit(bq);
bq2415x_power_supply_exit(bq);
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index 7287c0efd6bf..9e4dab46eefd 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -25,12 +25,23 @@
#include <linux/power/charger-manager.h>
#include <linux/regulator/consumer.h>
#include <linux/sysfs.h>
+#include <linux/of.h>
+#include <linux/thermal.h>
+
+/*
+ * Default termperature threshold for charging.
+ * Every temperature units are in tenth of centigrade.
+ */
+#define CM_DEFAULT_RECHARGE_TEMP_DIFF 50
+#define CM_DEFAULT_CHARGE_TEMP_MAX 500
static const char * const default_event_names[] = {
[CM_EVENT_UNKNOWN] = "Unknown",
[CM_EVENT_BATT_FULL] = "Battery Full",
[CM_EVENT_BATT_IN] = "Battery Inserted",
[CM_EVENT_BATT_OUT] = "Battery Pulled Out",
+ [CM_EVENT_BATT_OVERHEAT] = "Battery Overheat",
+ [CM_EVENT_BATT_COLD] = "Battery Cold",
[CM_EVENT_EXT_PWR_IN_OUT] = "External Power Attach/Detach",
[CM_EVENT_CHG_START_STOP] = "Charging Start/Stop",
[CM_EVENT_OTHERS] = "Other battery events"
@@ -518,7 +529,7 @@ static int check_charging_duration(struct charger_manager *cm)
duration = curr - cm->charging_start_time;
if (duration > desc->charging_max_duration_ms) {
- dev_info(cm->dev, "Charging duration exceed %lldms\n",
+ dev_info(cm->dev, "Charging duration exceed %ums\n",
desc->charging_max_duration_ms);
uevent_notify(cm, "Discharging");
try_charger_enable(cm, false);
@@ -529,7 +540,7 @@ static int check_charging_duration(struct charger_manager *cm)
if (duration > desc->charging_max_duration_ms &&
is_ext_pwr_online(cm)) {
- dev_info(cm->dev, "Discharging duration exceed %lldms\n",
+ dev_info(cm->dev, "Discharging duration exceed %ums\n",
desc->discharging_max_duration_ms);
uevent_notify(cm, "Recharging");
try_charger_enable(cm, true);
@@ -540,6 +551,60 @@ static int check_charging_duration(struct charger_manager *cm)
return ret;
}
+static int cm_get_battery_temperature(struct charger_manager *cm,
+ int *temp)
+{
+ int ret;
+
+ if (!cm->desc->measure_battery_temp)
+ return -ENODEV;
+
+#ifdef CONFIG_THERMAL
+ ret = thermal_zone_get_temp(cm->tzd_batt, (unsigned long *)temp);
+ if (!ret)
+ /* Calibrate temperature unit */
+ *temp /= 100;
+#else
+ ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+ POWER_SUPPLY_PROP_TEMP,
+ (union power_supply_propval *)temp);
+#endif
+ return ret;
+}
+
+static int cm_check_thermal_status(struct charger_manager *cm)
+{
+ struct charger_desc *desc = cm->desc;
+ int temp, upper_limit, lower_limit;
+ int ret = 0;
+
+ ret = cm_get_battery_temperature(cm, &temp);
+ if (ret) {
+ /* FIXME:
+ * No information of battery temperature might
+ * occur hazadous result. We have to handle it
+ * depending on battery type.
+ */
+ dev_err(cm->dev, "Failed to get battery temperature\n");
+ return 0;
+ }
+
+ upper_limit = desc->temp_max;
+ lower_limit = desc->temp_min;
+
+ if (cm->emergency_stop) {
+ upper_limit -= desc->temp_diff;
+ lower_limit += desc->temp_diff;
+ }
+
+ if (temp > upper_limit)
+ ret = CM_EVENT_BATT_OVERHEAT;
+ else if (temp < lower_limit)
+ ret = CM_EVENT_BATT_COLD;
+
+ return ret;
+}
+
/**
* _cm_monitor - Monitor the temperature and return true for exceptions.
* @cm: the Charger Manager representing the battery.
@@ -549,28 +614,22 @@ static int check_charging_duration(struct charger_manager *cm)
*/
static bool _cm_monitor(struct charger_manager *cm)
{
- struct charger_desc *desc = cm->desc;
- int temp = desc->temperature_out_of_range(&cm->last_temp_mC);
+ int temp_alrt;
- dev_dbg(cm->dev, "monitoring (%2.2d.%3.3dC)\n",
- cm->last_temp_mC / 1000, cm->last_temp_mC % 1000);
+ temp_alrt = cm_check_thermal_status(cm);
/* It has been stopped already */
- if (temp && cm->emergency_stop)
+ if (temp_alrt && cm->emergency_stop)
return false;
/*
* Check temperature whether overheat or cold.
* If temperature is out of range normal state, stop charging.
*/
- if (temp) {
- cm->emergency_stop = temp;
- if (!try_charger_enable(cm, false)) {
- if (temp > 0)
- uevent_notify(cm, "OVERHEAT");
- else
- uevent_notify(cm, "COLD");
- }
+ if (temp_alrt) {
+ cm->emergency_stop = temp_alrt;
+ if (!try_charger_enable(cm, false))
+ uevent_notify(cm, default_event_names[temp_alrt]);
/*
* Check whole charging duration and discharing duration
@@ -802,21 +861,8 @@ static int charger_get_property(struct power_supply *psy,
POWER_SUPPLY_PROP_CURRENT_NOW, val);
break;
case POWER_SUPPLY_PROP_TEMP:
- /* in thenth of centigrade */
- if (cm->last_temp_mC == INT_MIN)
- desc->temperature_out_of_range(&cm->last_temp_mC);
- val->intval = cm->last_temp_mC / 100;
- if (!desc->measure_battery_temp)
- ret = -ENODEV;
- break;
case POWER_SUPPLY_PROP_TEMP_AMBIENT:
- /* in thenth of centigrade */
- if (cm->last_temp_mC == INT_MIN)
- desc->temperature_out_of_range(&cm->last_temp_mC);
- val->intval = cm->last_temp_mC / 100;
- if (desc->measure_battery_temp)
- ret = -ENODEV;
- break;
+ return cm_get_battery_temperature(cm, &val->intval);
case POWER_SUPPLY_PROP_CAPACITY:
if (!cm->fuel_gauge) {
ret = -ENODEV;
@@ -1439,9 +1485,183 @@ err:
return ret;
}
+static int cm_init_thermal_data(struct charger_manager *cm)
+{
+ struct charger_desc *desc = cm->desc;
+ union power_supply_propval val;
+ int ret;
+
+ /* Verify whether fuel gauge provides battery temperature */
+ ret = cm->fuel_gauge->get_property(cm->fuel_gauge,
+ POWER_SUPPLY_PROP_TEMP, &val);
+
+ if (!ret) {
+ cm->charger_psy.properties[cm->charger_psy.num_properties] =
+ POWER_SUPPLY_PROP_TEMP;
+ cm->charger_psy.num_properties++;
+ cm->desc->measure_battery_temp = true;
+ }
+#ifdef CONFIG_THERMAL
+ cm->tzd_batt = cm->fuel_gauge->tzd;
+
+ if (ret && desc->thermal_zone) {
+ cm->tzd_batt =
+ thermal_zone_get_zone_by_name(desc->thermal_zone);
+ if (IS_ERR(cm->tzd_batt))
+ return PTR_ERR(cm->tzd_batt);
+
+ /* Use external thermometer */
+ cm->charger_psy.properties[cm->charger_psy.num_properties] =
+ POWER_SUPPLY_PROP_TEMP_AMBIENT;
+ cm->charger_psy.num_properties++;
+ cm->desc->measure_battery_temp = true;
+ ret = 0;
+ }
+#endif
+ if (cm->desc->measure_battery_temp) {
+ /* NOTICE : Default allowable minimum charge temperature is 0 */
+ if (!desc->temp_max)
+ desc->temp_max = CM_DEFAULT_CHARGE_TEMP_MAX;
+ if (!desc->temp_diff)
+ desc->temp_diff = CM_DEFAULT_RECHARGE_TEMP_DIFF;
+ }
+
+ return ret;
+}
+
+static struct of_device_id charger_manager_match[] = {
+ {
+ .compatible = "charger-manager",
+ },
+ {},
+};
+
+static struct charger_desc *of_cm_parse_desc(struct device *dev)
+{
+ struct charger_desc *desc;
+ struct device_node *np = dev->of_node;
+ u32 poll_mode = CM_POLL_DISABLE;
+ u32 battery_stat = CM_NO_BATTERY;
+ int num_chgs = 0;
+
+ desc = devm_kzalloc(dev, sizeof(*desc), GFP_KERNEL);
+ if (!desc)
+ return ERR_PTR(-ENOMEM);
+
+ of_property_read_string(np, "cm-name", &desc->psy_name);
+
+ of_property_read_u32(np, "cm-poll-mode", &poll_mode);
+ desc->polling_mode = poll_mode;
+
+ of_property_read_u32(np, "cm-poll-interval",
+ &desc->polling_interval_ms);
+
+ of_property_read_u32(np, "cm-fullbatt-vchkdrop-ms",
+ &desc->fullbatt_vchkdrop_ms);
+ of_property_read_u32(np, "cm-fullbatt-vchkdrop-volt",
+ &desc->fullbatt_vchkdrop_uV);
+ of_property_read_u32(np, "cm-fullbatt-voltage", &desc->fullbatt_uV);
+ of_property_read_u32(np, "cm-fullbatt-soc", &desc->fullbatt_soc);
+ of_property_read_u32(np, "cm-fullbatt-capacity",
+ &desc->fullbatt_full_capacity);
+
+ of_property_read_u32(np, "cm-battery-stat", &battery_stat);
+ desc->battery_present = battery_stat;
+
+ /* chargers */
+ of_property_read_u32(np, "cm-num-chargers", &num_chgs);
+ if (num_chgs) {
+ /* Allocate empty bin at the tail of array */
+ desc->psy_charger_stat = devm_kzalloc(dev, sizeof(char *)
+ * (num_chgs + 1), GFP_KERNEL);
+ if (desc->psy_charger_stat) {
+ int i;
+ for (i = 0; i < num_chgs; i++)
+ of_property_read_string_index(np, "cm-chargers",
+ i, &desc->psy_charger_stat[i]);
+ } else {
+ return ERR_PTR(-ENOMEM);
+ }
+ }
+
+ of_property_read_string(np, "cm-fuel-gauge", &desc->psy_fuel_gauge);
+
+ of_property_read_string(np, "cm-thermal-zone", &desc->thermal_zone);
+
+ of_property_read_u32(np, "cm-battery-cold", &desc->temp_min);
+ if (of_get_property(np, "cm-battery-cold-in-minus", NULL))
+ desc->temp_min *= -1;
+ of_property_read_u32(np, "cm-battery-hot", &desc->temp_max);
+ of_property_read_u32(np, "cm-battery-temp-diff", &desc->temp_diff);
+
+ of_property_read_u32(np, "cm-charging-max",
+ &desc->charging_max_duration_ms);
+ of_property_read_u32(np, "cm-discharging-max",
+ &desc->discharging_max_duration_ms);
+
+ /* battery charger regualtors */
+ desc->num_charger_regulators = of_get_child_count(np);
+ if (desc->num_charger_regulators) {
+ struct charger_regulator *chg_regs;
+ struct device_node *child;
+
+ chg_regs = devm_kzalloc(dev, sizeof(*chg_regs)
+ * desc->num_charger_regulators,
+ GFP_KERNEL);
+ if (!chg_regs)
+ return ERR_PTR(-ENOMEM);
+
+ desc->charger_regulators = chg_regs;
+
+ for_each_child_of_node(np, child) {
+ struct charger_cable *cables;
+ struct device_node *_child;
+
+ of_property_read_string(child, "cm-regulator-name",
+ &chg_regs->regulator_name);
+
+ /* charger cables */
+ chg_regs->num_cables = of_get_child_count(child);
+ if (chg_regs->num_cables) {
+ cables = devm_kzalloc(dev, sizeof(*cables)
+ * chg_regs->num_cables,
+ GFP_KERNEL);
+ if (!cables)
+ return ERR_PTR(-ENOMEM);
+
+ chg_regs->cables = cables;
+
+ for_each_child_of_node(child, _child) {
+ of_property_read_string(_child,
+ "cm-cable-name", &cables->name);
+ of_property_read_string(_child,
+ "cm-cable-extcon",
+ &cables->extcon_name);
+ of_property_read_u32(_child,
+ "cm-cable-min",
+ &cables->min_uA);
+ of_property_read_u32(_child,
+ "cm-cable-max",
+ &cables->max_uA);
+ cables++;
+ }
+ }
+ chg_regs++;
+ }
+ }
+ return desc;
+}
+
+static inline struct charger_desc *cm_get_drv_data(struct platform_device *pdev)
+{
+ if (pdev->dev.of_node)
+ return of_cm_parse_desc(&pdev->dev);
+ return (struct charger_desc *)dev_get_platdata(&pdev->dev);
+}
+
static int charger_manager_probe(struct platform_device *pdev)
{
- struct charger_desc *desc = dev_get_platdata(&pdev->dev);
+ struct charger_desc *desc = cm_get_drv_data(pdev);
struct charger_manager *cm;
int ret = 0, i = 0;
int j = 0;
@@ -1470,7 +1690,6 @@ static int charger_manager_probe(struct platform_device *pdev)
/* Basic Values. Unspecified are Null or 0 */
cm->dev = &pdev->dev;
cm->desc = desc;
- cm->last_temp_mC = INT_MIN; /* denotes "unmeasured, yet" */
/*
* The following two do not need to be errors.
@@ -1533,11 +1752,6 @@ static int charger_manager_probe(struct platform_device *pdev)
return -EINVAL;
}
- if (!desc->temperature_out_of_range) {
- dev_err(&pdev->dev, "there is no temperature_out_of_range\n");
- return -EINVAL;
- }
-
if (!desc->charging_max_duration_ms ||
!desc->discharging_max_duration_ms) {
dev_info(&pdev->dev, "Cannot limit charging duration checking mechanism to prevent overcharge/overheat and control discharging duration\n");
@@ -1583,14 +1797,10 @@ static int charger_manager_probe(struct platform_device *pdev)
cm->charger_psy.num_properties++;
}
- if (desc->measure_battery_temp) {
- cm->charger_psy.properties[cm->charger_psy.num_properties] =
- POWER_SUPPLY_PROP_TEMP;
- cm->charger_psy.num_properties++;
- } else {
- cm->charger_psy.properties[cm->charger_psy.num_properties] =
- POWER_SUPPLY_PROP_TEMP_AMBIENT;
- cm->charger_psy.num_properties++;
+ ret = cm_init_thermal_data(cm);
+ if (ret) {
+ dev_err(&pdev->dev, "Failed to initialize thermal data\n");
+ cm->desc->measure_battery_temp = false;
}
INIT_DELAYED_WORK(&cm->fullbatt_vchk_work, fullbatt_vchk);
@@ -1808,6 +2018,7 @@ static struct platform_driver charger_manager_driver = {
.name = "charger-manager",
.owner = THIS_MODULE,
.pm = &charger_manager_pm,
+ .of_match_table = charger_manager_match,
},
.probe = charger_manager_probe,
.remove = charger_manager_remove,
diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c
index 4e858a23568f..a0024b252197 100644
--- a/drivers/power/gpio-charger.c
+++ b/drivers/power/gpio-charger.c
@@ -28,6 +28,7 @@
struct gpio_charger {
const struct gpio_charger_platform_data *pdata;
unsigned int irq;
+ bool wakeup_enabled;
struct power_supply charger;
};
@@ -136,6 +137,8 @@ static int gpio_charger_probe(struct platform_device *pdev)
platform_set_drvdata(pdev, gpio_charger);
+ device_init_wakeup(&pdev->dev, 1);
+
return 0;
err_gpio_free:
@@ -159,18 +162,32 @@ static int gpio_charger_remove(struct platform_device *pdev)
}
#ifdef CONFIG_PM_SLEEP
+static int gpio_charger_suspend(struct device *dev)
+{
+ struct gpio_charger *gpio_charger = dev_get_drvdata(dev);
+
+ if (device_may_wakeup(dev))
+ gpio_charger->wakeup_enabled =
+ enable_irq_wake(gpio_charger->irq);
+
+ return 0;
+}
+
static int gpio_charger_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct gpio_charger *gpio_charger = platform_get_drvdata(pdev);
+ if (gpio_charger->wakeup_enabled)
+ disable_irq_wake(gpio_charger->irq);
power_supply_changed(&gpio_charger->charger);
return 0;
}
#endif
-static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops, NULL, gpio_charger_resume);
+static SIMPLE_DEV_PM_OPS(gpio_charger_pm_ops,
+ gpio_charger_suspend, gpio_charger_resume);
static struct platform_driver gpio_charger_driver = {
.probe = gpio_charger_probe,
diff --git a/drivers/power/isp1704_charger.c b/drivers/power/isp1704_charger.c
index 1bb3a91b1acc..80edb7d8cb54 100644
--- a/drivers/power/isp1704_charger.c
+++ b/drivers/power/isp1704_charger.c
@@ -29,6 +29,8 @@
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/delay.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
#include <linux/usb/otg.h>
#include <linux/usb/ulpi.h>
@@ -88,6 +90,8 @@ static void isp1704_charger_set_power(struct isp1704_charger *isp, bool on)
if (board && board->set_power)
board->set_power(on);
+ else if (board)
+ gpio_set_value(board->enable_gpio, on);
}
/*
@@ -400,12 +404,47 @@ static int isp1704_charger_probe(struct platform_device *pdev)
struct isp1704_charger *isp;
int ret = -ENODEV;
+ struct isp1704_charger_data *pdata = dev_get_platdata(&pdev->dev);
+ struct device_node *np = pdev->dev.of_node;
+
+ if (np) {
+ int gpio = of_get_named_gpio(np, "nxp,enable-gpio", 0);
+
+ if (gpio < 0)
+ return gpio;
+
+ pdata = devm_kzalloc(&pdev->dev,
+ sizeof(struct isp1704_charger_data), GFP_KERNEL);
+ pdata->enable_gpio = gpio;
+
+ dev_info(&pdev->dev, "init gpio %d\n", pdata->enable_gpio);
+
+ ret = devm_gpio_request_one(&pdev->dev, pdata->enable_gpio,
+ GPIOF_OUT_INIT_HIGH, "isp1704_reset");
+ if (ret)
+ goto fail0;
+ }
+
+ if (!pdata) {
+ dev_err(&pdev->dev, "missing platform data!\n");
+ return -ENODEV;
+ }
+
+
isp = devm_kzalloc(&pdev->dev, sizeof(*isp), GFP_KERNEL);
if (!isp)
return -ENOMEM;
- isp->phy = usb_get_phy(USB_PHY_TYPE_USB2);
- if (IS_ERR_OR_NULL(isp->phy))
+ if (np)
+ isp->phy = devm_usb_get_phy_by_phandle(&pdev->dev, "usb-phy", 0);
+ else
+ isp->phy = devm_usb_get_phy(&pdev->dev, USB_PHY_TYPE_USB2);
+
+ if (IS_ERR(isp->phy)) {
+ ret = PTR_ERR(isp->phy);
+ goto fail0;
+ }
+ if (!isp->phy)
goto fail0;
isp->dev = &pdev->dev;
@@ -464,7 +503,6 @@ fail2:
power_supply_unregister(&isp->psy);
fail1:
isp1704_charger_set_power(isp, 0);
- usb_put_phy(isp->phy);
fail0:
dev_err(&pdev->dev, "failed to register isp1704 with error %d\n", ret);
@@ -477,15 +515,23 @@ static int isp1704_charger_remove(struct platform_device *pdev)
usb_unregister_notifier(isp->phy, &isp->nb);
power_supply_unregister(&isp->psy);
- usb_put_phy(isp->phy);
isp1704_charger_set_power(isp, 0);
return 0;
}
+#ifdef CONFIG_OF
+static const struct of_device_id omap_isp1704_of_match[] = {
+ { .compatible = "nxp,isp1704", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, omap_isp1704_of_match);
+#endif
+
static struct platform_driver isp1704_charger_driver = {
.driver = {
.name = "isp1704_charger",
+ .of_match_table = of_match_ptr(omap_isp1704_of_match),
},
.probe = isp1704_charger_probe,
.remove = isp1704_charger_remove,
diff --git a/drivers/power/max14577_charger.c b/drivers/power/max14577_charger.c
new file mode 100644
index 000000000000..fad2a75b3604
--- /dev/null
+++ b/drivers/power/max14577_charger.c
@@ -0,0 +1,311 @@
+/*
+ * Battery charger driver for the Maxim 14577
+ *
+ * Copyright (C) 2013 Samsung Electronics
+ * Krzysztof Kozlowski <k.kozlowski@samsung.com>
+ *
+ * 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; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/power_supply.h>
+#include <linux/mfd/max14577-private.h>
+
+struct max14577_charger {
+ struct device *dev;
+ struct max14577 *max14577;
+ struct power_supply charger;
+
+ unsigned int charging_state;
+ unsigned int battery_state;
+};
+
+static int max14577_get_charger_state(struct max14577_charger *chg)
+{
+ struct regmap *rmap = chg->max14577->regmap;
+ int state = POWER_SUPPLY_STATUS_DISCHARGING;
+ u8 reg_data;
+
+ /*
+ * Charging occurs only if:
+ * - CHGCTRL2/MBCHOSTEN == 1
+ * - STATUS2/CGMBC == 1
+ *
+ * TODO:
+ * - handle FULL after Top-off timer (EOC register may be off
+ * and the charger won't be charging although MBCHOSTEN is on)
+ * - handle properly dead-battery charging (respect timer)
+ * - handle timers (fast-charge and prequal) /MBCCHGERR/
+ */
+ max14577_read_reg(rmap, MAX14577_CHG_REG_CHG_CTRL2, &reg_data);
+ if ((reg_data & CHGCTRL2_MBCHOSTEN_MASK) == 0)
+ goto state_set;
+
+ max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
+ if (reg_data & STATUS3_CGMBC_MASK) {
+ /* Charger or USB-cable is connected */
+ if (reg_data & STATUS3_EOC_MASK)
+ state = POWER_SUPPLY_STATUS_FULL;
+ else
+ state = POWER_SUPPLY_STATUS_CHARGING;
+ goto state_set;
+ }
+
+state_set:
+ chg->charging_state = state;
+ return state;
+}
+
+/*
+ * Supported charge types:
+ * - POWER_SUPPLY_CHARGE_TYPE_NONE
+ * - POWER_SUPPLY_CHARGE_TYPE_FAST
+ */
+static int max14577_get_charge_type(struct max14577_charger *chg)
+{
+ /*
+ * TODO: CHARGE_TYPE_TRICKLE (VCHGR_RC or EOC)?
+ * As spec says:
+ * [after reaching EOC interrupt]
+ * "When the battery is fully charged, the 30-minute (typ)
+ * top-off timer starts. The device continues to trickle
+ * charge the battery until the top-off timer runs out."
+ */
+ if (max14577_get_charger_state(chg) == POWER_SUPPLY_STATUS_CHARGING)
+ return POWER_SUPPLY_CHARGE_TYPE_FAST;
+ return POWER_SUPPLY_CHARGE_TYPE_NONE;
+}
+
+static int max14577_get_online(struct max14577_charger *chg)
+{
+ struct regmap *rmap = chg->max14577->regmap;
+ u8 reg_data;
+
+ max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
+ reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
+ switch (reg_data) {
+ case MAX14577_CHARGER_TYPE_USB:
+ case MAX14577_CHARGER_TYPE_DEDICATED_CHG:
+ case MAX14577_CHARGER_TYPE_SPECIAL_500MA:
+ case MAX14577_CHARGER_TYPE_SPECIAL_1A:
+ case MAX14577_CHARGER_TYPE_DEAD_BATTERY:
+ return 1;
+ case MAX14577_CHARGER_TYPE_NONE:
+ case MAX14577_CHARGER_TYPE_DOWNSTREAM_PORT:
+ case MAX14577_CHARGER_TYPE_RESERVED:
+ default:
+ return 0;
+ }
+}
+
+/*
+ * Supported health statuses:
+ * - POWER_SUPPLY_HEALTH_DEAD
+ * - POWER_SUPPLY_HEALTH_OVERVOLTAGE
+ * - POWER_SUPPLY_HEALTH_GOOD
+ */
+static int max14577_get_battery_health(struct max14577_charger *chg)
+{
+ struct regmap *rmap = chg->max14577->regmap;
+ int state = POWER_SUPPLY_HEALTH_GOOD;
+ u8 reg_data;
+
+ max14577_read_reg(rmap, MAX14577_MUIC_REG_STATUS2, &reg_data);
+ reg_data = ((reg_data & STATUS2_CHGTYP_MASK) >> STATUS2_CHGTYP_SHIFT);
+ if (reg_data == MAX14577_CHARGER_TYPE_DEAD_BATTERY) {
+ state = POWER_SUPPLY_HEALTH_DEAD;
+ goto state_set;
+ }
+
+ max14577_read_reg(rmap, MAX14577_CHG_REG_STATUS3, &reg_data);
+ if (reg_data & STATUS3_OVP_MASK) {
+ state = POWER_SUPPLY_HEALTH_OVERVOLTAGE;
+ goto state_set;
+ }
+
+state_set:
+ chg->battery_state = state;
+ return state;
+}
+
+/*
+ * Always returns 1.
+ * The max14577 chip doesn't report any status of battery presence.
+ * Lets assume that it will always be used with some battery.
+ */
+static int max14577_get_present(struct max14577_charger *chg)
+{
+ return 1;
+}
+
+/*
+ * Sets charger registers to proper and safe default values.
+ * Some of these values are equal to defaults in MAX14577E
+ * data sheet but there are minor differences.
+ */
+static void max14577_charger_reg_init(struct max14577_charger *chg)
+{
+ struct regmap *rmap = chg->max14577->regmap;
+ u8 reg_data;
+
+ /*
+ * Charger-Type Manual Detection, default off (set CHGTYPMAN to 0)
+ * Charger-Detection Enable, default on (set CHGDETEN to 1)
+ * Combined mask of CHGDETEN and CHGTYPMAN will zero the CHGTYPMAN bit
+ */
+ reg_data = 0x1 << CDETCTRL1_CHGDETEN_SHIFT;
+ max14577_update_reg(rmap, MAX14577_REG_CDETCTRL1,
+ CDETCTRL1_CHGDETEN_MASK | CDETCTRL1_CHGTYPMAN_MASK,
+ reg_data);
+
+ /* Battery Fast-Charge Timer, from SM-V700: 6hrs */
+ reg_data = 0x3 << CHGCTRL1_TCHW_SHIFT;
+ max14577_write_reg(rmap, MAX14577_REG_CHGCTRL1, reg_data);
+
+ /*
+ * Wall-Adapter Rapid Charge, default on
+ * Battery-Charger, default on
+ */
+ reg_data = 0x1 << CHGCTRL2_VCHGR_RC_SHIFT;
+ reg_data |= 0x1 << CHGCTRL2_MBCHOSTEN_SHIFT;
+ max14577_write_reg(rmap, MAX14577_REG_CHGCTRL2, reg_data);
+
+ /* Battery-Charger Constant Voltage (CV) Mode, from SM-V700: 4.35V */
+ reg_data = 0xf << CHGCTRL3_MBCCVWRC_SHIFT;
+ max14577_write_reg(rmap, MAX14577_REG_CHGCTRL3, reg_data);
+
+ /*
+ * Fast Battery-Charge Current Low, default 200-950mA
+ * Fast Battery-Charge Current High, from SM-V700: 450mA
+ */
+ reg_data = 0x1 << CHGCTRL4_MBCICHWRCL_SHIFT;
+ reg_data |= 0x5 << CHGCTRL4_MBCICHWRCH_SHIFT;
+ max14577_write_reg(rmap, MAX14577_REG_CHGCTRL4, reg_data);
+
+ /* End-of-Charge Current, from SM-V700: 50mA */
+ reg_data = 0x0 << CHGCTRL5_EOCS_SHIFT;
+ max14577_write_reg(rmap, MAX14577_REG_CHGCTRL5, reg_data);
+
+ /* Auto Charging Stop, default off */
+ reg_data = 0x0 << CHGCTRL6_AUTOSTOP_SHIFT;
+ max14577_write_reg(rmap, MAX14577_REG_CHGCTRL6, reg_data);
+
+ /* Overvoltage-Protection Threshold, from SM-V700: 6.5V */
+ reg_data = 0x2 << CHGCTRL7_OTPCGHCVS_SHIFT;
+ max14577_write_reg(rmap, MAX14577_REG_CHGCTRL7, reg_data);
+}
+
+/* Support property from charger */
+static enum power_supply_property max14577_charger_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_CHARGE_TYPE,
+ POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_MODEL_NAME,
+ POWER_SUPPLY_PROP_MANUFACTURER,
+};
+
+static const char *model_name = "MAX14577";
+static const char *manufacturer = "Maxim Integrated";
+
+static int max14577_charger_get_property(struct power_supply *psy,
+ enum power_supply_property psp,
+ union power_supply_propval *val)
+{
+ struct max14577_charger *chg = container_of(psy,
+ struct max14577_charger,
+ charger);
+ int ret = 0;
+
+ switch (psp) {
+ case POWER_SUPPLY_PROP_STATUS:
+ val->intval = max14577_get_charger_state(chg);
+ break;
+ case POWER_SUPPLY_PROP_CHARGE_TYPE:
+ val->intval = max14577_get_charge_type(chg);
+ break;
+ case POWER_SUPPLY_PROP_HEALTH:
+ val->intval = max14577_get_battery_health(chg);
+ break;
+ case POWER_SUPPLY_PROP_PRESENT:
+ val->intval = max14577_get_present(chg);
+ break;
+ case POWER_SUPPLY_PROP_ONLINE:
+ val->intval = max14577_get_online(chg);
+ break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ val->strval = model_name;
+ break;
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ val->strval = manufacturer;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int max14577_charger_probe(struct platform_device *pdev)
+{
+ struct max14577_charger *chg;
+ struct max14577 *max14577 = dev_get_drvdata(pdev->dev.parent);
+ int ret;
+
+ chg = devm_kzalloc(&pdev->dev, sizeof(*chg), GFP_KERNEL);
+ if (!chg)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, chg);
+ chg->dev = &pdev->dev;
+ chg->max14577 = max14577;
+
+ max14577_charger_reg_init(chg);
+
+ chg->charger.name = "max14577-charger",
+ chg->charger.type = POWER_SUPPLY_TYPE_BATTERY,
+ chg->charger.properties = max14577_charger_props,
+ chg->charger.num_properties = ARRAY_SIZE(max14577_charger_props),
+ chg->charger.get_property = max14577_charger_get_property,
+
+ ret = power_supply_register(&pdev->dev, &chg->charger);
+ if (ret) {
+ dev_err(&pdev->dev, "failed: power supply register\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int max14577_charger_remove(struct platform_device *pdev)
+{
+ struct max14577_charger *chg = platform_get_drvdata(pdev);
+
+ power_supply_unregister(&chg->charger);
+
+ return 0;
+}
+
+static struct platform_driver max14577_charger_driver = {
+ .driver = {
+ .owner = THIS_MODULE,
+ .name = "max14577-charger",
+ },
+ .probe = max14577_charger_probe,
+ .remove = max14577_charger_remove,
+};
+module_platform_driver(max14577_charger_driver);
+
+MODULE_AUTHOR("Krzysztof Kozlowski <k.kozlowski@samsung.com>");
+MODULE_DESCRIPTION("MAXIM 14577 charger driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/power/max17042_battery.c b/drivers/power/max17042_battery.c
index e0b22f9b6fdd..66da691c41cf 100644
--- a/drivers/power/max17042_battery.c
+++ b/drivers/power/max17042_battery.c
@@ -741,9 +741,9 @@ static int max17042_probe(struct i2c_client *client,
if (client->irq) {
ret = request_threaded_irq(client->irq, NULL,
- max17042_thread_handler,
- IRQF_TRIGGER_FALLING,
- chip->battery.name, chip);
+ max17042_thread_handler,
+ IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
+ chip->battery.name, chip);
if (!ret) {
regmap_read(chip->regmap, MAX17042_CONFIG, &val);
val |= CONFIG_ALRT_BIT_ENBL;
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 557af943b2f5..26606641fe44 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -15,6 +15,7 @@
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/device.h>
+#include <linux/notifier.h>
#include <linux/err.h>
#include <linux/power_supply.h>
#include <linux/thermal.h>
@@ -24,6 +25,9 @@
struct class *power_supply_class;
EXPORT_SYMBOL_GPL(power_supply_class);
+ATOMIC_NOTIFIER_HEAD(power_supply_notifier);
+EXPORT_SYMBOL_GPL(power_supply_notifier);
+
static struct device_type power_supply_dev_type;
static bool __power_supply_is_supplied_by(struct power_supply *supplier,
@@ -80,6 +84,8 @@ static void power_supply_changed_work(struct work_struct *work)
class_for_each_device(power_supply_class, NULL, psy,
__power_supply_changed_work);
power_supply_update_leds(psy);
+ atomic_notifier_call_chain(&power_supply_notifier,
+ PSY_EVENT_PROP_CHANGED, psy);
kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE);
spin_lock_irqsave(&psy->changed_lock, flags);
}
@@ -335,6 +341,32 @@ struct power_supply *power_supply_get_by_name(const char *name)
}
EXPORT_SYMBOL_GPL(power_supply_get_by_name);
+#ifdef CONFIG_OF
+static int power_supply_match_device_node(struct device *dev, const void *data)
+{
+ return dev->parent && dev->parent->of_node == data;
+}
+
+struct power_supply *power_supply_get_by_phandle(struct device_node *np,
+ const char *property)
+{
+ struct device_node *power_supply_np;
+ struct device *dev;
+
+ power_supply_np = of_parse_phandle(np, property, 0);
+ if (!power_supply_np)
+ return ERR_PTR(-ENODEV);
+
+ dev = class_find_device(power_supply_class, NULL, power_supply_np,
+ power_supply_match_device_node);
+
+ of_node_put(power_supply_np);
+
+ return dev ? dev_get_drvdata(dev) : NULL;
+}
+EXPORT_SYMBOL_GPL(power_supply_get_by_phandle);
+#endif /* CONFIG_OF */
+
int power_supply_powers(struct power_supply *psy, struct device *dev)
{
return sysfs_create_link(&psy->dev->kobj, &dev->kobj, "powers");
@@ -347,6 +379,18 @@ static void power_supply_dev_release(struct device *dev)
kfree(dev);
}
+int power_supply_reg_notifier(struct notifier_block *nb)
+{
+ return atomic_notifier_chain_register(&power_supply_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(power_supply_reg_notifier);
+
+void power_supply_unreg_notifier(struct notifier_block *nb)
+{
+ atomic_notifier_chain_unregister(&power_supply_notifier, nb);
+}
+EXPORT_SYMBOL_GPL(power_supply_unreg_notifier);
+
#ifdef CONFIG_THERMAL
static int power_supply_read_temp(struct thermal_zone_device *tzd,
unsigned long *temp)
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index 9b3ea535b472..6d452a78b19c 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -6,6 +6,12 @@ menuconfig POWER_RESET
Say Y here to enable board reset and power off
+config POWER_RESET_AS3722
+ bool "ams AS3722 power-off driver"
+ depends on MFD_AS3722 && POWER_RESET
+ help
+ This driver supports turning off board via a ams AS3722 power-off.
+
config POWER_RESET_GPIO
bool "GPIO power-off driver"
depends on OF_GPIO && POWER_RESET
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index 3e6ed88725ac..a5b4a77d1a41 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_POWER_RESET_AS3722) += as3722-poweroff.o
obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
diff --git a/drivers/power/reset/as3722-poweroff.c b/drivers/power/reset/as3722-poweroff.c
new file mode 100644
index 000000000000..684971199bd3
--- /dev/null
+++ b/drivers/power/reset/as3722-poweroff.c
@@ -0,0 +1,96 @@
+/*
+ * Power off driver for ams AS3722 device.
+ *
+ * Copyright (c) 2013, NVIDIA CORPORATION. All rights reserved.
+ *
+ * Author: Laxman Dewangan <ldewangan@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope 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.
+ */
+
+#include <linux/mfd/as3722.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+struct as3722_poweroff {
+ struct device *dev;
+ struct as3722 *as3722;
+};
+
+static struct as3722_poweroff *as3722_pm_poweroff;
+
+static void as3722_pm_power_off(void)
+{
+ int ret;
+
+ if (!as3722_pm_poweroff) {
+ pr_err("AS3722 poweroff is not initialised\n");
+ return;
+ }
+
+ ret = as3722_update_bits(as3722_pm_poweroff->as3722,
+ AS3722_RESET_CONTROL_REG, AS3722_POWER_OFF, AS3722_POWER_OFF);
+ if (ret < 0)
+ dev_err(as3722_pm_poweroff->dev,
+ "RESET_CONTROL_REG update failed, %d\n", ret);
+}
+
+static int as3722_poweroff_probe(struct platform_device *pdev)
+{
+ struct as3722_poweroff *as3722_poweroff;
+ struct device_node *np = pdev->dev.parent->of_node;
+
+ if (!np)
+ return -EINVAL;
+
+ if (!of_property_read_bool(np, "ams,system-power-controller"))
+ return 0;
+
+ as3722_poweroff = devm_kzalloc(&pdev->dev, sizeof(*as3722_poweroff),
+ GFP_KERNEL);
+ if (!as3722_poweroff)
+ return -ENOMEM;
+
+ as3722_poweroff->as3722 = dev_get_drvdata(pdev->dev.parent);
+ as3722_poweroff->dev = &pdev->dev;
+ as3722_pm_poweroff = as3722_poweroff;
+ if (!pm_power_off)
+ pm_power_off = as3722_pm_power_off;
+
+ return 0;
+}
+
+static int as3722_poweroff_remove(struct platform_device *pdev)
+{
+ if (pm_power_off == as3722_pm_power_off)
+ pm_power_off = NULL;
+ as3722_pm_poweroff = NULL;
+
+ return 0;
+}
+
+static struct platform_driver as3722_poweroff_driver = {
+ .driver = {
+ .name = "as3722-power-off",
+ .owner = THIS_MODULE,
+ },
+ .probe = as3722_poweroff_probe,
+ .remove = as3722_poweroff_remove,
+};
+
+module_platform_driver(as3722_poweroff_driver);
+
+MODULE_DESCRIPTION("Power off driver for ams AS3722 PMIC Device");
+MODULE_ALIAS("platform:as3722-power-off");
+MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
+MODULE_LICENSE("GPL v2");
generated by cgit v1.2.3 (git 2.0.4) at 2024-12-29 08:21:49 +0000