[PATCH v7 5/7] power: act8945a_charger: Add capacity level property
From: Wenyou Yang
Date: Mon Aug 22 2016 - 02:53:02 EST
Add the power supply capacity level property, it corresponds to
POWER_SUPPLY_CAPACITY_LEVEL_*.
It also utilizes the precision voltage detector function module
to catch the low battery voltage.
Signed-off-by: Wenyou Yang <wenyou.yang@xxxxxxxxx>
---
Changes in v7:
- For "lbo-gpios", use gpiod_get() to fix devm_gpiod_get() wrong use
with parent device as *dev argument.
- Add the handle -EPROBE_DEFER returned from gpiod_get "lbo-gpios".
- Use dev_info() to print log if the lbo irq request failed.
- Remove unneeded semicolon.
- Add depends on GPIOLIB for use gpiod.
Changes in v6:
- For "lbo-gpios", use gpiod API instead of old gpio API to handle.
Changes in v5: None
Changes in v4:
- Change devname of devm_request_irq() from "lbo-detect" to
"act8945a, lbo-detect".
Changes in v3: None
Changes in v2: None
drivers/power/supply/Kconfig | 2 +-
drivers/power/supply/act8945a_charger.c | 110 +++++++++++++++++++++++++++++---
2 files changed, 102 insertions(+), 10 deletions(-)
diff --git a/drivers/power/supply/Kconfig b/drivers/power/supply/Kconfig
index 76806a0..a983de2 100644
--- a/drivers/power/supply/Kconfig
+++ b/drivers/power/supply/Kconfig
@@ -77,7 +77,7 @@ config BATTERY_88PM860X
config BATTERY_ACT8945A
tristate "Active-semi ACT8945A charger driver"
- depends on MFD_ACT8945A || COMPILE_TEST
+ depends on MFD_ACT8945A || GPIOLIB || COMPILE_TEST
help
Say Y here to enable support for power supply provided by
Active-semi ActivePath ACT8945A charger.
diff --git a/drivers/power/supply/act8945a_charger.c b/drivers/power/supply/act8945a_charger.c
index 3536b67..cc79abe 100644
--- a/drivers/power/supply/act8945a_charger.c
+++ b/drivers/power/supply/act8945a_charger.c
@@ -18,6 +18,7 @@
#include <linux/platform_device.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
+#include <linux/gpio/consumer.h>
static const char *act8945a_charger_model = "ACT8945A";
static const char *act8945a_charger_manufacturer = "Active-semi";
@@ -83,6 +84,7 @@ struct act8945a_charger {
struct work_struct work;
bool init_done;
+ struct gpio_desc *lbo_gpio;
};
static int act8945a_get_charger_state(struct regmap *regmap, int *val)
@@ -208,11 +210,67 @@ static int act8945a_get_battery_health(struct regmap *regmap, int *val)
return 0;
}
+static int act8945a_get_capacity_level(struct act8945a_charger *charger,
+ struct regmap *regmap, int *val)
+{
+ int ret;
+ unsigned int status, state, config;
+ int lbo_level = gpiod_get_value(charger->lbo_gpio);
+
+ ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_read(regmap, ACT8945A_APCH_CFG, &config);
+ if (ret < 0)
+ return ret;
+
+ ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state);
+ if (ret < 0)
+ return ret;
+
+ state &= APCH_STATE_CSTATE;
+ state >>= APCH_STATE_CSTATE_SHIFT;
+
+ switch (state) {
+ case APCH_STATE_CSTATE_PRE:
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ break;
+ case APCH_STATE_CSTATE_FAST:
+ if (lbo_level)
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_HIGH;
+ else
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_LOW;
+ break;
+ case APCH_STATE_CSTATE_EOC:
+ if (status & APCH_STATUS_CHGDAT)
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_FULL;
+ else
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ break;
+ case APCH_STATE_CSTATE_DISABLED:
+ default:
+ if (config & APCH_CFG_SUSCHG) {
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_UNKNOWN;
+ } else {
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_NORMAL;
+ if (!(status & APCH_STATUS_INDAT)) {
+ if (!lbo_level)
+ *val = POWER_SUPPLY_CAPACITY_LEVEL_CRITICAL;
+ }
+ }
+ break;
+ }
+
+ return 0;
+}
+
static enum power_supply_property act8945a_charger_props[] = {
POWER_SUPPLY_PROP_STATUS,
POWER_SUPPLY_PROP_CHARGE_TYPE,
POWER_SUPPLY_PROP_TECHNOLOGY,
POWER_SUPPLY_PROP_HEALTH,
+ POWER_SUPPLY_PROP_CAPACITY_LEVEL,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER
};
@@ -238,6 +296,10 @@ static int act8945a_charger_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_HEALTH:
ret = act8945a_get_battery_health(regmap, &val->intval);
break;
+ case POWER_SUPPLY_PROP_CAPACITY_LEVEL:
+ ret = act8945a_get_capacity_level(charger,
+ regmap, &val->intval);
+ break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = act8945a_charger_model;
break;
@@ -327,7 +389,7 @@ static irqreturn_t act8945a_status_changed(int irq, void *dev_id)
static int act8945a_charger_config(struct device *dev,
struct act8945a_charger *charger)
{
- struct device_node *np = dev->of_node;
+ struct device_node *np = dev->parent->of_node;
enum of_gpio_flags flags;
struct regmap *regmap = charger->regmap;
@@ -354,6 +416,21 @@ static int act8945a_charger_config(struct device *dev,
dev_info(dev, "have been suspended\n");
}
+ charger->lbo_gpio = gpiod_get(dev->parent, "active-semi,lbo", GPIOD_IN);
+ if (PTR_ERR(charger->lbo_gpio) == -EPROBE_DEFER) {
+ dev_info(dev, "probe retry requested for gpio \"lbo\"\n");
+ } else if (IS_ERR(charger->lbo_gpio)) {
+ dev_err(dev, "unable to claim gpio \"lbo\"\n");
+ charger->lbo_gpio = NULL;
+ }
+
+ ret = devm_request_irq(dev, gpiod_to_irq(charger->lbo_gpio),
+ act8945a_status_changed,
+ (IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING),
+ "act8945a_lbo_detect", charger);
+ if (ret)
+ dev_info(dev, "failed to request gpio \"lbo\" IRQ\n");
+
chglev_pin = of_get_named_gpio_flags(np,
"active-semi,chglev-gpios", 0, &flags);
@@ -443,14 +520,15 @@ static int act8945a_charger_probe(struct platform_device *pdev)
return -EINVAL;
}
- ret = act8945a_charger_config(pdev->dev.parent, charger);
+ ret = act8945a_charger_config(&pdev->dev, charger);
if (ret)
return ret;
irq = of_irq_get(pdev->dev.parent->of_node, 0);
if (irq == -EPROBE_DEFER) {
dev_err(&pdev->dev, "failed to find IRQ number\n");
- return -EPROBE_DEFER;
+ ret = -EPROBE_DEFER;
+ goto fail;
}
ret = devm_request_irq(&pdev->dev, irq, act8945a_status_changed,
@@ -458,7 +536,7 @@ static int act8945a_charger_probe(struct platform_device *pdev)
charger);
if (ret) {
dev_err(&pdev->dev, "failed to request nIRQ pin IRQ\n");
- return ret;
+ goto fail;
}
charger->desc.name = "act8945a-charger";
@@ -467,8 +545,10 @@ static int act8945a_charger_probe(struct platform_device *pdev)
charger->desc.num_properties = ARRAY_SIZE(act8945a_charger_props);
ret = act8945a_set_supply_type(charger, &charger->desc.type);
- if (ret)
- return -EINVAL;
+ if (ret) {
+ ret = -EINVAL;
+ goto fail;
+ }
psy_cfg.of_node = pdev->dev.parent->of_node;
psy_cfg.drv_data = charger;
@@ -478,7 +558,8 @@ static int act8945a_charger_probe(struct platform_device *pdev)
&psy_cfg);
if (IS_ERR(charger->psy)) {
dev_err(&pdev->dev, "failed to register power supply\n");
- return PTR_ERR(charger->psy);
+ ret = PTR_ERR(charger->psy);
+ goto fail;
}
platform_set_drvdata(pdev, charger);
@@ -486,12 +567,20 @@ static int act8945a_charger_probe(struct platform_device *pdev)
INIT_WORK(&charger->work, act8945a_work);
ret = act8945a_enable_interrupt(charger);
- if (ret)
- return -EIO;
+ if (ret) {
+ ret = -EIO;
+ goto fail;
+ }
charger->init_done = true;
return 0;
+
+fail:
+ if (charger->lbo_gpio)
+ gpiod_put(charger->lbo_gpio);
+
+ return ret;
}
static int act8945a_charger_remove(struct platform_device *pdev)
@@ -501,6 +590,9 @@ static int act8945a_charger_remove(struct platform_device *pdev)
charger->init_done = false;
cancel_work_sync(&charger->work);
+ if (charger->lbo_gpio)
+ gpiod_put(charger->lbo_gpio);
+
return 0;
}
--
2.7.4