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-rw-r--r--drivers/power/bq27x00_battery.c52
-rw-r--r--drivers/power/charger-manager.c11
-rw-r--r--drivers/power/gpio-charger.c2
-rw-r--r--drivers/power/max8925_power.c7
-rw-r--r--drivers/power/power_supply_core.c100
-rw-r--r--drivers/power/power_supply_leds.c19
-rw-r--r--drivers/power/power_supply_sysfs.c24
-rw-r--r--drivers/power/reset/Kconfig7
-rw-r--r--drivers/power/reset/Makefile1
-rw-r--r--drivers/power/reset/ltc2952-poweroff.c386
-rw-r--r--drivers/power/reset/xgene-reboot.c2
-rw-r--r--drivers/power/sbs-battery.c125
12 files changed, 643 insertions, 93 deletions
diff --git a/drivers/power/bq27x00_battery.c b/drivers/power/bq27x00_battery.c
index e10763e3a1d5..5b9f0eacb20a 100644
--- a/drivers/power/bq27x00_battery.c
+++ b/drivers/power/bq27x00_battery.c
@@ -23,6 +23,7 @@
* http://focus.ti.com/docs/prod/folders/print/bq27000.html
* http://focus.ti.com/docs/prod/folders/print/bq27500.html
* http://www.ti.com/product/bq27425-g1
+ * http://www.ti.com/product/BQ27742-G1
*/
#include <linux/device.h>
@@ -71,6 +72,8 @@
#define BQ27500_FLAG_FC BIT(9)
#define BQ27500_FLAG_OTC BIT(15)
+#define BQ27742_POWER_AVG 0x76
+
/* bq27425 register addresses are same as bq27x00 addresses minus 4 */
#define BQ27425_REG_OFFSET 0x04
#define BQ27425_REG_SOC 0x18 /* Register address plus offset */
@@ -83,7 +86,7 @@ struct bq27x00_access_methods {
int (*read)(struct bq27x00_device_info *di, u8 reg, bool single);
};
-enum bq27x00_chip { BQ27000, BQ27500, BQ27425};
+enum bq27x00_chip { BQ27000, BQ27500, BQ27425, BQ27742};
struct bq27x00_reg_cache {
int temperature;
@@ -152,6 +155,24 @@ static enum power_supply_property bq27425_battery_props[] = {
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
};
+static enum power_supply_property bq27742_battery_props[] = {
+ POWER_SUPPLY_PROP_STATUS,
+ POWER_SUPPLY_PROP_PRESENT,
+ POWER_SUPPLY_PROP_VOLTAGE_NOW,
+ POWER_SUPPLY_PROP_CURRENT_NOW,
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
+ POWER_SUPPLY_PROP_TEMP,
+ POWER_SUPPLY_PROP_TIME_TO_EMPTY_NOW,
+ POWER_SUPPLY_PROP_TECHNOLOGY,
+ POWER_SUPPLY_PROP_CHARGE_FULL,
+ POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ POWER_SUPPLY_PROP_CYCLE_COUNT,
+ POWER_SUPPLY_PROP_POWER_AVG,
+ POWER_SUPPLY_PROP_HEALTH,
+};
+
static unsigned int poll_interval = 360;
module_param(poll_interval, uint, 0644);
MODULE_PARM_DESC(poll_interval, "battery poll interval in seconds - " \
@@ -176,7 +197,7 @@ static inline int bq27x00_read(struct bq27x00_device_info *di, u8 reg,
*/
static bool bq27xxx_is_chip_version_higher(struct bq27x00_device_info *di)
{
- if (di->chip == BQ27425 || di->chip == BQ27500)
+ if (di->chip == BQ27425 || di->chip == BQ27500 || di->chip == BQ27742)
return true;
return false;
}
@@ -189,7 +210,7 @@ static int bq27x00_battery_read_rsoc(struct bq27x00_device_info *di)
{
int rsoc;
- if (di->chip == BQ27500)
+ if (di->chip == BQ27500 || di->chip == BQ27742)
rsoc = bq27x00_read(di, BQ27500_REG_SOC, false);
else if (di->chip == BQ27425)
rsoc = bq27x00_read(di, BQ27425_REG_SOC, false);
@@ -414,6 +435,7 @@ static void bq27x00_update(struct bq27x00_device_info *di)
struct bq27x00_reg_cache cache = {0, };
bool is_bq27500 = di->chip == BQ27500;
bool is_bq27425 = di->chip == BQ27425;
+ bool is_bq27742 = di->chip == BQ27742;
cache.flags = bq27x00_read(di, BQ27x00_REG_FLAGS, !is_bq27500);
if ((cache.flags & 0xff) == 0xff)
@@ -432,7 +454,11 @@ static void bq27x00_update(struct bq27x00_device_info *di)
cache.health = -ENODATA;
} else {
cache.capacity = bq27x00_battery_read_rsoc(di);
- if (!is_bq27425) {
+ if (is_bq27742)
+ cache.time_to_empty =
+ bq27x00_battery_read_time(di,
+ BQ27x00_REG_TTE);
+ else if (!is_bq27425) {
cache.energy = bq27x00_battery_read_energy(di);
cache.time_to_empty =
bq27x00_battery_read_time(di,
@@ -444,14 +470,22 @@ static void bq27x00_update(struct bq27x00_device_info *di)
bq27x00_battery_read_time(di,
BQ27x00_REG_TTF);
}
- cache.charge_full = bq27x00_battery_read_lmd(di);
+ if (!is_bq27742)
+ cache.charge_full =
+ bq27x00_battery_read_lmd(di);
cache.health = bq27x00_battery_read_health(di);
}
cache.temperature = bq27x00_battery_read_temperature(di);
if (!is_bq27425)
cache.cycle_count = bq27x00_battery_read_cyct(di);
- cache.power_avg =
- bq27x00_battery_read_pwr_avg(di, BQ27x00_POWER_AVG);
+ if (is_bq27742)
+ cache.power_avg =
+ bq27x00_battery_read_pwr_avg(di,
+ BQ27742_POWER_AVG);
+ else
+ cache.power_avg =
+ bq27x00_battery_read_pwr_avg(di,
+ BQ27x00_POWER_AVG);
/* We only have to read charge design full once */
if (di->charge_design_full <= 0)
@@ -702,6 +736,9 @@ static int bq27x00_powersupply_init(struct bq27x00_device_info *di)
if (di->chip == BQ27425) {
di->bat.properties = bq27425_battery_props;
di->bat.num_properties = ARRAY_SIZE(bq27425_battery_props);
+ } else if (di->chip == BQ27742) {
+ di->bat.properties = bq27742_battery_props;
+ di->bat.num_properties = ARRAY_SIZE(bq27742_battery_props);
} else {
di->bat.properties = bq27x00_battery_props;
di->bat.num_properties = ARRAY_SIZE(bq27x00_battery_props);
@@ -858,6 +895,7 @@ static const struct i2c_device_id bq27x00_id[] = {
{ "bq27200", BQ27000 }, /* bq27200 is same as bq27000, but with i2c */
{ "bq27500", BQ27500 },
{ "bq27425", BQ27425 },
+ { "bq27742", BQ27742 },
{},
};
MODULE_DEVICE_TABLE(i2c, bq27x00_id);
diff --git a/drivers/power/charger-manager.c b/drivers/power/charger-manager.c
index 9e4dab46eefd..c1ed3c99c059 100644
--- a/drivers/power/charger-manager.c
+++ b/drivers/power/charger-manager.c
@@ -1656,7 +1656,7 @@ 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);
+ return dev_get_platdata(&pdev->dev);
}
static int charger_manager_probe(struct platform_device *pdev)
@@ -1677,7 +1677,7 @@ static int charger_manager_probe(struct platform_device *pdev)
}
}
- if (!desc) {
+ if (IS_ERR(desc)) {
dev_err(&pdev->dev, "No platform data (desc) found\n");
return -ENODEV;
}
@@ -1839,6 +1839,13 @@ static int charger_manager_probe(struct platform_device *pdev)
device_init_wakeup(&pdev->dev, true);
device_set_wakeup_capable(&pdev->dev, false);
+ /*
+ * Charger-manager have to check the charging state right after
+ * tialization of charger-manager and then update current charging
+ * state.
+ */
+ cm_monitor();
+
schedule_work(&setup_polling);
return 0;
diff --git a/drivers/power/gpio-charger.c b/drivers/power/gpio-charger.c
index a0024b252197..7536933d0ab9 100644
--- a/drivers/power/gpio-charger.c
+++ b/drivers/power/gpio-charger.c
@@ -55,7 +55,7 @@ static int gpio_charger_get_property(struct power_supply *psy,
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
- val->intval = gpio_get_value_cansleep(pdata->gpio);
+ val->intval = !!gpio_get_value_cansleep(pdata->gpio);
val->intval ^= pdata->gpio_active_low;
break;
default:
diff --git a/drivers/power/max8925_power.c b/drivers/power/max8925_power.c
index b4513f284bbc..a6d45eef64dd 100644
--- a/drivers/power/max8925_power.c
+++ b/drivers/power/max8925_power.c
@@ -443,7 +443,7 @@ max8925_power_dt_init(struct platform_device *pdev)
if (!nproot)
return pdev->dev.platform_data;
- np = of_find_node_by_name(nproot, "charger");
+ np = of_get_child_by_name(nproot, "charger");
if (!np) {
dev_err(&pdev->dev, "failed to find charger node\n");
return NULL;
@@ -452,13 +452,14 @@ max8925_power_dt_init(struct platform_device *pdev)
pdata = devm_kzalloc(&pdev->dev,
sizeof(struct max8925_power_pdata),
GFP_KERNEL);
+ if (!pdata)
+ goto ret;
of_property_read_u32(np, "topoff-threshold", &topoff_threshold);
of_property_read_u32(np, "batt-detect", &batt_detect);
of_property_read_u32(np, "fast-charge", &fast_charge);
of_property_read_u32(np, "no-insert-detect", &no_insert_detect);
of_property_read_u32(np, "no-temp-support", &no_temp_support);
- of_node_put(np);
pdata->batt_detect = batt_detect;
pdata->fast_charge = fast_charge;
@@ -466,6 +467,8 @@ max8925_power_dt_init(struct platform_device *pdev)
pdata->no_insert_detect = no_insert_detect;
pdata->no_temp_support = no_temp_support;
+ret:
+ of_node_put(np);
return pdata;
}
#else
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 078afd61490d..6cb7fe5c022d 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -58,7 +58,7 @@ static bool __power_supply_is_supplied_by(struct power_supply *supplier,
static int __power_supply_changed_work(struct device *dev, void *data)
{
- struct power_supply *psy = (struct power_supply *)data;
+ struct power_supply *psy = data;
struct power_supply *pst = dev_get_drvdata(dev);
if (__power_supply_is_supplied_by(psy, pst)) {
@@ -78,7 +78,14 @@ static void power_supply_changed_work(struct work_struct *work)
dev_dbg(psy->dev, "%s\n", __func__);
spin_lock_irqsave(&psy->changed_lock, flags);
- if (psy->changed) {
+ /*
+ * Check 'changed' here to avoid issues due to race between
+ * power_supply_changed() and this routine. In worst case
+ * power_supply_changed() can be called again just before we take above
+ * lock. During the first call of this routine we will mark 'changed' as
+ * false and it will stay false for the next call as well.
+ */
+ if (likely(psy->changed)) {
psy->changed = false;
spin_unlock_irqrestore(&psy->changed_lock, flags);
class_for_each_device(power_supply_class, NULL, psy,
@@ -89,12 +96,13 @@ static void power_supply_changed_work(struct work_struct *work)
kobject_uevent(&psy->dev->kobj, KOBJ_CHANGE);
spin_lock_irqsave(&psy->changed_lock, flags);
}
+
/*
- * Dependent power supplies (e.g. battery) may have changed state
- * as a result of this event, so poll again and hold the
- * wakeup_source until all events are processed.
+ * Hold the wakeup_source until all events are processed.
+ * power_supply_changed() might have called again and have set 'changed'
+ * to true.
*/
- if (!psy->changed)
+ if (likely(!psy->changed))
pm_relax(psy->dev);
spin_unlock_irqrestore(&psy->changed_lock, flags);
}
@@ -119,7 +127,7 @@ EXPORT_SYMBOL_GPL(power_supply_changed);
static int __power_supply_populate_supplied_from(struct device *dev,
void *data)
{
- struct power_supply *psy = (struct power_supply *)data;
+ struct power_supply *psy = data;
struct power_supply *epsy = dev_get_drvdata(dev);
struct device_node *np;
int i = 0;
@@ -127,7 +135,7 @@ static int __power_supply_populate_supplied_from(struct device *dev,
do {
np = of_parse_phandle(psy->of_node, "power-supplies", i++);
if (!np)
- continue;
+ break;
if (np == epsy->of_node) {
dev_info(psy->dev, "%s: Found supply : %s\n",
@@ -158,12 +166,12 @@ static int power_supply_populate_supplied_from(struct power_supply *psy)
static int __power_supply_find_supply_from_node(struct device *dev,
void *data)
{
- struct device_node *np = (struct device_node *)data;
+ struct device_node *np = data;
struct power_supply *epsy = dev_get_drvdata(dev);
- /* return error breaks out of class_for_each_device loop */
+ /* returning non-zero breaks out of class_for_each_device loop */
if (epsy->of_node == np)
- return -EINVAL;
+ return 1;
return 0;
}
@@ -171,30 +179,21 @@ static int __power_supply_find_supply_from_node(struct device *dev,
static int power_supply_find_supply_from_node(struct device_node *supply_node)
{
int error;
- struct device *dev;
- struct class_dev_iter iter;
/*
- * Use iterator to see if any other device is registered.
- * This is required since class_for_each_device returns 0
- * if there are no devices registered.
- */
- class_dev_iter_init(&iter, power_supply_class, NULL, NULL);
- dev = class_dev_iter_next(&iter);
-
- if (!dev)
- return -EPROBE_DEFER;
-
- /*
- * We have to treat the return value as inverted, because if
- * we return error on not found, then it won't continue looking.
- * So we trick it by returning error on success to stop looking
- * once the matching device is found.
+ * class_for_each_device() either returns its own errors or values
+ * returned by __power_supply_find_supply_from_node().
+ *
+ * __power_supply_find_supply_from_node() will return 0 (no match)
+ * or 1 (match).
+ *
+ * We return 0 if class_for_each_device() returned 1, -EPROBE_DEFER if
+ * it returned 0, or error as returned by it.
*/
error = class_for_each_device(power_supply_class, NULL, supply_node,
__power_supply_find_supply_from_node);
- return error ? 0 : -EPROBE_DEFER;
+ return error ? (error == 1 ? 0 : error) : -EPROBE_DEFER;
}
static int power_supply_check_supplies(struct power_supply *psy)
@@ -215,17 +214,21 @@ static int power_supply_check_supplies(struct power_supply *psy)
np = of_parse_phandle(psy->of_node, "power-supplies", cnt++);
if (!np)
- continue;
+ break;
ret = power_supply_find_supply_from_node(np);
+ of_node_put(np);
+
if (ret) {
- dev_dbg(psy->dev, "Failed to find supply, defer!\n");
- of_node_put(np);
- return -EPROBE_DEFER;
+ dev_dbg(psy->dev, "Failed to find supply!\n");
+ return ret;
}
- of_node_put(np);
} while (np);
+ /* Missing valid "power-supplies" entries */
+ if (cnt == 1)
+ return 0;
+
/* All supplies found, allocate char ** array for filling */
psy->supplied_from = devm_kzalloc(psy->dev, sizeof(psy->supplied_from),
GFP_KERNEL);
@@ -234,7 +237,7 @@ static int power_supply_check_supplies(struct power_supply *psy)
return -ENOMEM;
}
- *psy->supplied_from = devm_kzalloc(psy->dev, sizeof(char *) * cnt,
+ *psy->supplied_from = devm_kzalloc(psy->dev, sizeof(char *) * (cnt - 1),
GFP_KERNEL);
if (!*psy->supplied_from) {
dev_err(psy->dev, "Couldn't allocate memory for supply list\n");
@@ -253,14 +256,12 @@ static inline int power_supply_check_supplies(struct power_supply *psy)
static int __power_supply_am_i_supplied(struct device *dev, void *data)
{
union power_supply_propval ret = {0,};
- struct power_supply *psy = (struct power_supply *)data;
+ struct power_supply *psy = data;
struct power_supply *epsy = dev_get_drvdata(dev);
if (__power_supply_is_supplied_by(epsy, psy))
- if (!epsy->get_property(epsy, POWER_SUPPLY_PROP_ONLINE, &ret)) {
- if (ret.intval)
- return ret.intval;
- }
+ if (!epsy->get_property(epsy, POWER_SUPPLY_PROP_ONLINE, &ret))
+ return ret.intval;
return 0;
}
@@ -285,12 +286,10 @@ static int __power_supply_is_system_supplied(struct device *dev, void *data)
unsigned int *count = data;
(*count)++;
- if (psy->type != POWER_SUPPLY_TYPE_BATTERY) {
- if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &ret))
- return 0;
- if (ret.intval)
+ if (psy->type != POWER_SUPPLY_TYPE_BATTERY)
+ if (!psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &ret))
return ret.intval;
- }
+
return 0;
}
@@ -423,9 +422,7 @@ static int psy_register_thermal(struct power_supply *psy)
if (psy->properties[i] == POWER_SUPPLY_PROP_TEMP) {
psy->tzd = thermal_zone_device_register(psy->name, 0, 0,
psy, &psy_tzd_ops, NULL, 0, 0);
- if (IS_ERR(psy->tzd))
- return PTR_ERR(psy->tzd);
- break;
+ return PTR_ERR_OR_ZERO(psy->tzd);
}
}
return 0;
@@ -503,9 +500,7 @@ static int psy_register_cooler(struct power_supply *psy)
psy->tcd = thermal_cooling_device_register(
(char *)psy->name,
psy, &psy_tcd_ops);
- if (IS_ERR(psy->tcd))
- return PTR_ERR(psy->tcd);
- break;
+ return PTR_ERR_OR_ZERO(psy->tcd);
}
}
return 0;
@@ -591,7 +586,7 @@ static int __power_supply_register(struct device *parent,
power_supply_changed(psy);
- goto success;
+ return 0;
create_triggers_failed:
psy_unregister_cooler(psy);
@@ -604,7 +599,6 @@ wakeup_init_failed:
check_supplies_failed:
dev_set_name_failed:
put_device(dev);
-success:
return rc;
}
diff --git a/drivers/power/power_supply_leds.c b/drivers/power/power_supply_leds.c
index 995f966ed5b7..effa093c37b0 100644
--- a/drivers/power/power_supply_leds.c
+++ b/drivers/power/power_supply_leds.c
@@ -57,8 +57,6 @@ static void power_supply_update_bat_leds(struct power_supply *psy)
static int power_supply_create_bat_triggers(struct power_supply *psy)
{
- int rc = 0;
-
psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
"%s-charging-or-full", psy->name);
if (!psy->charging_full_trig_name)
@@ -87,7 +85,7 @@ static int power_supply_create_bat_triggers(struct power_supply *psy)
led_trigger_register_simple(psy->charging_blink_full_solid_trig_name,
&psy->charging_blink_full_solid_trig);
- goto success;
+ return 0;
charging_blink_full_solid_failed:
kfree(psy->full_trig_name);
@@ -96,9 +94,7 @@ full_failed:
charging_failed:
kfree(psy->charging_full_trig_name);
charging_full_failed:
- rc = -ENOMEM;
-success:
- return rc;
+ return -ENOMEM;
}
static void power_supply_remove_bat_triggers(struct power_supply *psy)
@@ -132,20 +128,13 @@ static void power_supply_update_gen_leds(struct power_supply *psy)
static int power_supply_create_gen_triggers(struct power_supply *psy)
{
- int rc = 0;
-
psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online", psy->name);
if (!psy->online_trig_name)
- goto online_failed;
+ return -ENOMEM;
led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
- goto success;
-
-online_failed:
- rc = -ENOMEM;
-success:
- return rc;
+ return 0;
}
static void power_supply_remove_gen_triggers(struct power_supply *psy)
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index 750a20275664..62653f50a524 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -73,19 +73,20 @@ static ssize_t power_supply_show_property(struct device *dev,
const ptrdiff_t off = attr - power_supply_attrs;
union power_supply_propval value;
- if (off == POWER_SUPPLY_PROP_TYPE)
+ if (off == POWER_SUPPLY_PROP_TYPE) {
value.intval = psy->type;
- else
+ } else {
ret = psy->get_property(psy, off, &value);
- if (ret < 0) {
- if (ret == -ENODATA)
- dev_dbg(dev, "driver has no data for `%s' property\n",
- attr->attr.name);
- else if (ret != -ENODEV)
- dev_err(dev, "driver failed to report `%s' property: %zd\n",
- attr->attr.name, ret);
- return ret;
+ if (ret < 0) {
+ if (ret == -ENODATA)
+ dev_dbg(dev, "driver has no data for `%s' property\n",
+ attr->attr.name);
+ else if (ret != -ENODEV)
+ dev_err(dev, "driver failed to report `%s' property: %zd\n",
+ attr->attr.name, ret);
+ return ret;
+ }
}
if (off == POWER_SUPPLY_PROP_STATUS)
@@ -149,9 +150,11 @@ static struct device_attribute power_supply_attrs[] = {
POWER_SUPPLY_ATTR(voltage_now),
POWER_SUPPLY_ATTR(voltage_avg),
POWER_SUPPLY_ATTR(voltage_ocv),
+ POWER_SUPPLY_ATTR(voltage_boot),
POWER_SUPPLY_ATTR(current_max),
POWER_SUPPLY_ATTR(current_now),
POWER_SUPPLY_ATTR(current_avg),
+ POWER_SUPPLY_ATTR(current_boot),
POWER_SUPPLY_ATTR(power_now),
POWER_SUPPLY_ATTR(power_avg),
POWER_SUPPLY_ATTR(charge_full_design),
@@ -193,6 +196,7 @@ static struct device_attribute power_supply_attrs[] = {
POWER_SUPPLY_ATTR(type),
POWER_SUPPLY_ATTR(scope),
POWER_SUPPLY_ATTR(charge_term_current),
+ POWER_SUPPLY_ATTR(calibrate),
/* Properties of type `const char *' */
POWER_SUPPLY_ATTR(model_name),
POWER_SUPPLY_ATTR(manufacturer),
diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig
index ca41523bbebf..76156394d68a 100644
--- a/drivers/power/reset/Kconfig
+++ b/drivers/power/reset/Kconfig
@@ -51,6 +51,13 @@ config POWER_RESET_MSM
help
Power off and restart support for Qualcomm boards.
+config POWER_RESET_LTC2952
+ bool "LTC2952 PowerPath power-off driver"
+ depends on OF_GPIO && POWER_RESET
+ help
+ This driver supports an external powerdown trigger and board power
+ down via the LTC2952. Bindings are made in the device tree.
+
config POWER_RESET_QNAP
bool "QNAP power-off driver"
depends on OF_GPIO && POWER_RESET && PLAT_ORION
diff --git a/drivers/power/reset/Makefile b/drivers/power/reset/Makefile
index a42e70edd037..5d943528c8f7 100644
--- a/drivers/power/reset/Makefile
+++ b/drivers/power/reset/Makefile
@@ -4,6 +4,7 @@ obj-$(CONFIG_POWER_RESET_BRCMSTB) += brcmstb-reboot.o
obj-$(CONFIG_POWER_RESET_GPIO) += gpio-poweroff.o
obj-$(CONFIG_POWER_RESET_HISI) += hisi-reboot.o
obj-$(CONFIG_POWER_RESET_MSM) += msm-poweroff.o
+obj-$(CONFIG_POWER_RESET_LTC2952) += ltc2952-poweroff.o
obj-$(CONFIG_POWER_RESET_QNAP) += qnap-poweroff.o
obj-$(CONFIG_POWER_RESET_RESTART) += restart-poweroff.o
obj-$(CONFIG_POWER_RESET_SUN6I) += sun6i-reboot.o
diff --git a/drivers/power/reset/ltc2952-poweroff.c b/drivers/power/reset/ltc2952-poweroff.c
new file mode 100644
index 000000000000..116a1cef8f7b
--- /dev/null
+++ b/drivers/power/reset/ltc2952-poweroff.c
@@ -0,0 +1,386 @@
+/*
+ * LTC2952 (PowerPath) driver
+ *
+ * Copyright (C) 2014, Xsens Technologies BV <info@xsens.com>
+ * Maintainer: René Moll <linux@r-moll.nl>
+ *
+ * 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.
+ *
+ * ----------------------------------------
+ * - Description
+ * ----------------------------------------
+ *
+ * This driver is to be used with an external PowerPath Controller (LTC2952).
+ * Its function is to determine when a external shut down is triggered
+ * and react by properly shutting down the system.
+ *
+ * This driver expects a device tree with a ltc2952 entry for pin mapping.
+ *
+ * ----------------------------------------
+ * - GPIO
+ * ----------------------------------------
+ *
+ * The following GPIOs are used:
+ * - trigger (input)
+ * A level change indicates the shut-down trigger. If it's state reverts
+ * within the time-out defined by trigger_delay, the shut down is not
+ * executed.
+ *
+ * - watchdog (output)
+ * Once a shut down is triggered, the driver will toggle this signal,
+ * with an internal (wde_interval) to stall the hardware shut down.
+ *
+ * - kill (output)
+ * The last action during shut down is triggering this signalling, such
+ * that the PowerPath Control will power down the hardware.
+ *
+ * ----------------------------------------
+ * - Interrupts
+ * ----------------------------------------
+ *
+ * The driver requires a non-shared, edge-triggered interrupt on the trigger
+ * GPIO.
+ *
+ */
+
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/platform_device.h>
+#include <linux/ktime.h>
+#include <linux/slab.h>
+#include <linux/kmod.h>
+#include <linux/module.h>
+#include <linux/gpio/consumer.h>
+#include <linux/reboot.h>
+
+struct ltc2952_poweroff_data {
+ struct hrtimer timer_trigger;
+ struct hrtimer timer_wde;
+
+ ktime_t trigger_delay;
+ ktime_t wde_interval;
+
+ struct device *dev;
+
+ unsigned int virq;
+
+ /**
+ * 0: trigger
+ * 1: watchdog
+ * 2: kill
+ */
+ struct gpio_desc *gpio[3];
+};
+
+static int ltc2952_poweroff_panic;
+static struct ltc2952_poweroff_data *ltc2952_data;
+
+#define POWERPATH_IO_TRIGGER 0
+#define POWERPATH_IO_WATCHDOG 1
+#define POWERPATH_IO_KILL 2
+
+/**
+ * ltc2952_poweroff_timer_wde - Timer callback
+ * Toggles the watchdog reset signal each wde_interval
+ *
+ * @timer: corresponding timer
+ *
+ * Returns HRTIMER_RESTART for an infinite loop which will only stop when the
+ * machine actually shuts down
+ */
+static enum hrtimer_restart ltc2952_poweroff_timer_wde(struct hrtimer *timer)
+{
+ ktime_t now;
+ int state;
+ unsigned long overruns;
+
+ if (ltc2952_poweroff_panic)
+ return HRTIMER_NORESTART;
+
+ state = gpiod_get_value(ltc2952_data->gpio[POWERPATH_IO_WATCHDOG]);
+ gpiod_set_value(ltc2952_data->gpio[POWERPATH_IO_WATCHDOG], !state);
+
+ now = hrtimer_cb_get_time(timer);
+ overruns = hrtimer_forward(timer, now, ltc2952_data->wde_interval);
+
+ return HRTIMER_RESTART;
+}
+
+static enum hrtimer_restart ltc2952_poweroff_timer_trigger(
+ struct hrtimer *timer)
+{
+ int ret;
+
+ ret = hrtimer_start(&ltc2952_data->timer_wde,
+ ltc2952_data->wde_interval, HRTIMER_MODE_REL);
+
+ if (ret) {
+ dev_err(ltc2952_data->dev, "unable to start the timer\n");
+ /*
+ * The device will not toggle the watchdog reset,
+ * thus shut down is only safe if the PowerPath controller
+ * has a long enough time-off before triggering a hardware
+ * power-off.
+ *
+ * Only sending a warning as the system will power-off anyway
+ */
+ }
+
+ dev_info(ltc2952_data->dev, "executing shutdown\n");
+
+ orderly_poweroff(true);
+
+ return HRTIMER_NORESTART;
+}
+
+/**
+ * ltc2952_poweroff_handler - Interrupt handler
+ * Triggered each time the trigger signal changes state and (de)activates a
+ * time-out (timer_trigger). Once the time-out is actually reached the shut
+ * down is executed.
+ *
+ * @irq: IRQ number
+ * @dev_id: pointer to the main data structure
+ */
+static irqreturn_t ltc2952_poweroff_handler(int irq, void *dev_id)
+{
+ int ret;
+ struct ltc2952_poweroff_data *data = dev_id;
+
+ if (ltc2952_poweroff_panic)
+ goto irq_ok;
+
+ if (hrtimer_active(&data->timer_wde)) {
+ /* shutdown is already triggered, nothing to do any more */
+ goto irq_ok;
+ }
+
+ if (!hrtimer_active(&data->timer_trigger)) {
+ ret = hrtimer_start(&data->timer_trigger, data->trigger_delay,
+ HRTIMER_MODE_REL);
+
+ if (ret)
+ dev_err(data->dev, "unable to start the wait timer\n");
+ } else {
+ ret = hrtimer_cancel(&data->timer_trigger);
+ /* omitting return value check, timer should have been valid */
+ }
+
+irq_ok:
+ return IRQ_HANDLED;
+}
+
+static void ltc2952_poweroff_kill(void)
+{
+ gpiod_set_value(ltc2952_data->gpio[POWERPATH_IO_KILL], 1);
+}
+
+static int ltc2952_poweroff_suspend(struct platform_device *pdev,
+ pm_message_t state)
+{
+ return -ENOSYS;
+}
+
+static int ltc2952_poweroff_resume(struct platform_device *pdev)
+{
+ return -ENOSYS;
+}
+
+static void ltc2952_poweroff_default(struct ltc2952_poweroff_data *data)
+{
+ unsigned int i;
+
+ for (i = 0; i < ARRAY_SIZE(data->gpio); i++)
+ data->gpio[i] = NULL;
+
+ data->wde_interval = ktime_set(0, 300L*1E6L);
+ data->trigger_delay = ktime_set(2, 500L*1E6L);
+
+ hrtimer_init(&data->timer_trigger, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ data->timer_trigger.function = &ltc2952_poweroff_timer_trigger;
+
+ hrtimer_init(&data->timer_wde, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
+ data->timer_wde.function = &ltc2952_poweroff_timer_wde;
+}
+
+static int ltc2952_poweroff_init(struct platform_device *pdev)
+{
+ int ret, virq;
+ unsigned int i;
+ struct ltc2952_poweroff_data *data;
+
+ static char *name[] = {
+ "trigger",
+ "watchdog",
+ "kill",
+ NULL
+ };
+
+ data = ltc2952_data;
+ ltc2952_poweroff_default(ltc2952_data);
+
+ for (i = 0; i < ARRAY_SIZE(ltc2952_data->gpio); i++) {
+ ltc2952_data->gpio[i] = gpiod_get(&pdev->dev, name[i]);
+
+ if (IS_ERR(ltc2952_data->gpio[i])) {
+ ret = PTR_ERR(ltc2952_data->gpio[i]);
+ dev_err(&pdev->dev,
+ "unable to claim the following gpio: %s\n",
+ name[i]);
+ goto err_io;
+ }
+ }
+
+ ret = gpiod_direction_output(
+ ltc2952_data->gpio[POWERPATH_IO_WATCHDOG], 0);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to use watchdog-gpio as output\n");
+ goto err_io;
+ }
+
+ ret = gpiod_direction_output(ltc2952_data->gpio[POWERPATH_IO_KILL], 0);
+ if (ret) {
+ dev_err(&pdev->dev, "unable to use kill-gpio as output\n");
+ goto err_io;
+ }
+
+ virq = gpiod_to_irq(ltc2952_data->gpio[POWERPATH_IO_TRIGGER]);
+ if (virq < 0) {
+ dev_err(&pdev->dev, "cannot map GPIO as interrupt");
+ goto err_io;
+ }
+
+ ltc2952_data->virq = virq;
+ ret = request_irq(virq,
+ ltc2952_poweroff_handler,
+ (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING),
+ "ltc2952-poweroff",
+ ltc2952_data
+ );
+
+ if (ret) {
+ dev_err(&pdev->dev, "cannot configure an interrupt handler\n");
+ goto err_io;
+ }
+
+ return 0;
+
+err_io:
+ for (i = 0; i < ARRAY_SIZE(ltc2952_data->gpio); i++)
+ if (ltc2952_data->gpio[i])
+ gpiod_put(ltc2952_data->gpio[i]);
+
+ return ret;
+}
+
+static int ltc2952_poweroff_probe(struct platform_device *pdev)
+{
+ int ret;
+
+ if (pm_power_off) {
+ dev_err(&pdev->dev, "pm_power_off already registered");
+ return -EBUSY;
+ }
+
+ ltc2952_data = kzalloc(sizeof(*ltc2952_data), GFP_KERNEL);
+ if (!ltc2952_data)
+ return -ENOMEM;
+
+ ltc2952_data->dev = &pdev->dev;
+
+ ret = ltc2952_poweroff_init(pdev);
+ if (ret)
+ goto err;
+
+ pm_power_off = &ltc2952_poweroff_kill;
+
+ dev_info(&pdev->dev, "probe successful\n");
+
+ return 0;
+
+err:
+ kfree(ltc2952_data);
+ return ret;
+}
+
+static int ltc2952_poweroff_remove(struct platform_device *pdev)
+{
+ unsigned int i;
+
+ pm_power_off = NULL;
+
+ if (ltc2952_data) {
+ free_irq(ltc2952_data->virq, ltc2952_data);
+
+ for (i = 0; i < ARRAY_SIZE(ltc2952_data->gpio); i++)
+ gpiod_put(ltc2952_data->gpio[i]);
+
+ kfree(ltc2952_data);
+ }
+
+ return 0;
+}
+
+static const struct of_device_id of_ltc2952_poweroff_match[] = {
+ { .compatible = "lltc,ltc2952"},
+ {},
+};
+MODULE_DEVICE_TABLE(of, of_ltc2952_poweroff_match);
+
+static struct platform_driver ltc2952_poweroff_driver = {
+ .probe = ltc2952_poweroff_probe,
+ .remove = ltc2952_poweroff_remove,
+ .driver = {
+ .name = "ltc2952-poweroff",
+ .owner = THIS_MODULE,
+ .of_match_table = of_ltc2952_poweroff_match,
+ },
+ .suspend = ltc2952_poweroff_suspend,
+ .resume = ltc2952_poweroff_resume,
+};
+
+static int ltc2952_poweroff_notify_panic(struct notifier_block *nb,
+ unsigned long code, void *unused)
+{
+ ltc2952_poweroff_panic = 1;
+ return NOTIFY_DONE;
+}
+
+static struct notifier_block ltc2952_poweroff_panic_nb = {
+ .notifier_call = ltc2952_poweroff_notify_panic,
+};
+
+static int __init ltc2952_poweroff_platform_init(void)
+{
+ ltc2952_poweroff_panic = 0;
+
+ atomic_notifier_chain_register(&panic_notifier_list,
+ &ltc2952_poweroff_panic_nb);
+
+ return platform_driver_register(&ltc2952_poweroff_driver);
+}
+
+static void __exit ltc2952_poweroff_platform_exit(void)
+{
+ atomic_notifier_chain_unregister(&panic_notifier_list,
+ &ltc2952_poweroff_panic_nb);
+
+ platform_driver_unregister(&ltc2952_poweroff_driver);
+}
+
+module_init(ltc2952_poweroff_platform_init);
+module_exit(ltc2952_poweroff_platform_exit);
+
+MODULE_AUTHOR("René Moll <rene.moll@xsens.com>");
+MODULE_DESCRIPTION("LTC PowerPath power-off driver");
+MODULE_LICENSE("GPL v2");
diff --git a/drivers/power/reset/xgene-reboot.c b/drivers/power/reset/xgene-reboot.c
index ecd55f81b9d1..6b49be6867ab 100644
--- a/drivers/power/reset/xgene-reboot.c
+++ b/drivers/power/reset/xgene-reboot.c
@@ -40,7 +40,7 @@ struct xgene_reboot_context {
static struct xgene_reboot_context *xgene_restart_ctx;
-static void xgene_restart(char str, const char *cmd)
+static void xgene_restart(enum reboot_mode mode, const char *cmd)
{
struct xgene_reboot_context *ctx = xgene_restart_ctx;
unsigned long timeout;
diff --git a/drivers/power/sbs-battery.c b/drivers/power/sbs-battery.c
index b5f2a76b6cdf..c7b7b4018df3 100644
--- a/drivers/power/sbs-battery.c
+++ b/drivers/power/sbs-battery.c
@@ -48,7 +48,10 @@ enum {
REG_FULL_CHARGE_CAPACITY_CHARGE,
REG_DESIGN_CAPACITY,
REG_DESIGN_CAPACITY_CHARGE,
- REG_DESIGN_VOLTAGE,
+ REG_DESIGN_VOLTAGE_MIN,
+ REG_DESIGN_VOLTAGE_MAX,
+ REG_MANUFACTURER,
+ REG_MODEL_NAME,
};
/* Battery Mode defines */
@@ -68,6 +71,7 @@ enum sbs_battery_mode {
#define BATTERY_FULL_CHARGED 0x20
#define BATTERY_FULL_DISCHARGED 0x10
+/* min_value and max_value are only valid for numerical data */
#define SBS_DATA(_psp, _addr, _min_value, _max_value) { \
.psp = _psp, \
.addr = _addr, \
@@ -111,10 +115,17 @@ static const struct chip_data {
SBS_DATA(POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN, 0x18, 0, 65535),
[REG_DESIGN_CAPACITY_CHARGE] =
SBS_DATA(POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN, 0x18, 0, 65535),
- [REG_DESIGN_VOLTAGE] =
+ [REG_DESIGN_VOLTAGE_MIN] =
+ SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN, 0x19, 0, 65535),
+ [REG_DESIGN_VOLTAGE_MAX] =
SBS_DATA(POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN, 0x19, 0, 65535),
[REG_SERIAL_NUMBER] =
SBS_DATA(POWER_SUPPLY_PROP_SERIAL_NUMBER, 0x1C, 0, 65535),
+ /* Properties of type `const char *' */
+ [REG_MANUFACTURER] =
+ SBS_DATA(POWER_SUPPLY_PROP_MANUFACTURER, 0x20, 0, 65535),
+ [REG_MODEL_NAME] =
+ SBS_DATA(POWER_SUPPLY_PROP_MODEL_NAME, 0x21, 0, 65535)
};
static enum power_supply_property sbs_properties[] = {
@@ -130,6 +141,7 @@ static enum power_supply_property sbs_properties[] = {
POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG,
POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
+ POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN,
POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN,
POWER_SUPPLY_PROP_ENERGY_NOW,
POWER_SUPPLY_PROP_ENERGY_FULL,
@@ -137,6 +149,9 @@ static enum power_supply_property sbs_properties[] = {
POWER_SUPPLY_PROP_CHARGE_NOW,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
+ /* Properties of type `const char *' */
+ POWER_SUPPLY_PROP_MANUFACTURER,
+ POWER_SUPPLY_PROP_MODEL_NAME
};
struct sbs_info {
@@ -153,6 +168,9 @@ struct sbs_info {
int ignore_changes;
};
+static char model_name[I2C_SMBUS_BLOCK_MAX + 1];
+static char manufacturer[I2C_SMBUS_BLOCK_MAX + 1];
+
static int sbs_read_word_data(struct i2c_client *client, u8 address)
{
struct sbs_info *chip = i2c_get_clientdata(client);
@@ -179,6 +197,74 @@ static int sbs_read_word_data(struct i2c_client *client, u8 address)
return le16_to_cpu(ret);
}
+static int sbs_read_string_data(struct i2c_client *client, u8 address,
+ char *values)
+{
+ struct sbs_info *chip = i2c_get_clientdata(client);
+ s32 ret = 0, block_length = 0;
+ int retries_length = 1, retries_block = 1;
+ u8 block_buffer[I2C_SMBUS_BLOCK_MAX + 1];
+
+ if (chip->pdata) {
+ retries_length = max(chip->pdata->i2c_retry_count + 1, 1);
+ retries_block = max(chip->pdata->i2c_retry_count + 1, 1);
+ }
+
+ /* Adapter needs to support these two functions */
+ if (!i2c_check_functionality(client->adapter,
+ I2C_FUNC_SMBUS_BYTE_DATA |
+ I2C_FUNC_SMBUS_I2C_BLOCK)){
+ return -ENODEV;
+ }
+
+ /* Get the length of block data */
+ while (retries_length > 0) {
+ ret = i2c_smbus_read_byte_data(client, address);
+ if (ret >= 0)
+ break;
+ retries_length--;
+ }
+
+ if (ret < 0) {
+ dev_dbg(&client->dev,
+ "%s: i2c read at address 0x%x failed\n",
+ __func__, address);
+ return ret;
+ }
+
+ /* block_length does not include NULL terminator */
+ block_length = ret;
+ if (block_length > I2C_SMBUS_BLOCK_MAX) {
+ dev_err(&client->dev,
+ "%s: Returned block_length is longer than 0x%x\n",
+ __func__, I2C_SMBUS_BLOCK_MAX);
+ return -EINVAL;
+ }
+
+ /* Get the block data */
+ while (retries_block > 0) {
+ ret = i2c_smbus_read_i2c_block_data(
+ client, address,
+ block_length + 1, block_buffer);
+ if (ret >= 0)
+ break;
+ retries_block--;
+ }
+
+ if (ret < 0) {
+ dev_dbg(&client->dev,
+ "%s: i2c read at address 0x%x failed\n",
+ __func__, address);
+ return ret;
+ }
+
+ /* block_buffer[0] == block_length */
+ memcpy(values, block_buffer + 1, block_length);
+ values[block_length] = '\0';
+
+ return le16_to_cpu(ret);
+}
+
static int sbs_write_word_data(struct i2c_client *client, u8 address,
u16 value)
{
@@ -318,6 +404,19 @@ static int sbs_get_battery_property(struct i2c_client *client,
return 0;
}
+static int sbs_get_battery_string_property(struct i2c_client *client,
+ int reg_offset, enum power_supply_property psp, char *val)
+{
+ s32 ret;
+
+ ret = sbs_read_string_data(client, sbs_data[reg_offset].addr, val);
+
+ if (ret < 0)
+ return ret;
+
+ return 0;
+}
+
static void sbs_unit_adjustment(struct i2c_client *client,
enum power_supply_property psp, union power_supply_propval *val)
{
@@ -336,6 +435,7 @@ static void sbs_unit_adjustment(struct i2c_client *client,
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
case POWER_SUPPLY_PROP_CURRENT_NOW:
case POWER_SUPPLY_PROP_CHARGE_NOW:
@@ -497,6 +597,7 @@ static int sbs_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_TEMP:
case POWER_SUPPLY_PROP_TIME_TO_EMPTY_AVG:
case POWER_SUPPLY_PROP_TIME_TO_FULL_AVG:
+ case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
ret = sbs_get_property_index(client, psp);
if (ret < 0)
@@ -505,6 +606,26 @@ static int sbs_get_property(struct power_supply *psy,
ret = sbs_get_battery_property(client, ret, psp, val);
break;
+ case POWER_SUPPLY_PROP_MODEL_NAME:
+ ret = sbs_get_property_index(client, psp);
+ if (ret < 0)
+ break;
+
+ ret = sbs_get_battery_string_property(client, ret, psp,
+ model_name);
+ val->strval = model_name;
+ break;
+
+ case POWER_SUPPLY_PROP_MANUFACTURER:
+ ret = sbs_get_property_index(client, psp);
+ if (ret < 0)
+ break;
+
+ ret = sbs_get_battery_string_property(client, ret, psp,
+ manufacturer);
+ val->strval = manufacturer;
+ break;
+
default:
dev_err(&client->dev,
"%s: INVALID property\n", __func__);
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