diff options
author | Wenyou Yang <wenyou.yang@atmel.com> | 2016-09-01 12:29:59 +0300 |
---|---|---|
committer | Sebastian Reichel <sre@kernel.org> | 2016-09-01 14:55:55 +0300 |
commit | 528e3504123d0281c613b83ca46aaf2dd7c3f45e (patch) | |
tree | 94e66d32f7f8d23707789dce98d6981ec9e65599 /drivers/power | |
parent | 369eba0986d503302784f55f1020129bf802ae72 (diff) | |
download | linux-528e3504123d0281c613b83ca46aaf2dd7c3f45e.tar.xz |
power: supply: act8945a_charger: Add max current property
Add the power supply's current max property,
POWER_SUPPLY_PROP_CURRENT_MAX.
Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Sebastian Reichel <sre@kernel.org>
Diffstat (limited to 'drivers/power')
-rw-r--r-- | drivers/power/supply/act8945a_charger.c | 89 |
1 files changed, 80 insertions, 9 deletions
diff --git a/drivers/power/supply/act8945a_charger.c b/drivers/power/supply/act8945a_charger.c index 2f875997d97a..d1eb2e359532 100644 --- a/drivers/power/supply/act8945a_charger.c +++ b/drivers/power/supply/act8945a_charger.c @@ -13,7 +13,6 @@ #include <linux/interrupt.h> #include <linux/module.h> #include <linux/of.h> -#include <linux/of_gpio.h> #include <linux/of_irq.h> #include <linux/platform_device.h> #include <linux/power_supply.h> @@ -85,6 +84,7 @@ struct act8945a_charger { bool init_done; struct gpio_desc *lbo_gpio; + struct gpio_desc *chglev_gpio; }; static int act8945a_get_charger_state(struct regmap *regmap, int *val) @@ -265,12 +265,80 @@ static int act8945a_get_capacity_level(struct act8945a_charger *charger, return 0; } +#define MAX_CURRENT_USB_HIGH 450000 +#define MAX_CURRENT_USB_LOW 90000 +#define MAX_CURRENT_USB_PRE 45000 +/* + * Riset(K) = 2336 * (1V/Ichg(mA)) - 0.205 + * Riset = 2.43K + */ +#define MAX_CURRENT_AC_HIGH 886527 +#define MAX_CURRENT_AC_LOW 117305 +#define MAX_CURRENT_AC_HIGH_PRE 88653 +#define MAX_CURRENT_AC_LOW_PRE 11731 + +static int act8945a_get_current_max(struct act8945a_charger *charger, + struct regmap *regmap, int *val) +{ + int ret; + unsigned int status, state; + unsigned int acin_state; + int chgin_level = gpiod_get_value(charger->chglev_gpio); + + ret = regmap_read(regmap, ACT8945A_APCH_STATUS, &status); + if (ret < 0) + return ret; + + ret = regmap_read(regmap, ACT8945A_APCH_STATE, &state); + if (ret < 0) + return ret; + + acin_state = (state & APCH_STATE_ACINSTAT) >> 1; + + state &= APCH_STATE_CSTATE; + state >>= APCH_STATE_CSTATE_SHIFT; + + switch (state) { + case APCH_STATE_CSTATE_PRE: + if (acin_state) { + if (chgin_level) + *val = MAX_CURRENT_AC_HIGH_PRE; + else + *val = MAX_CURRENT_AC_LOW_PRE; + } else { + *val = MAX_CURRENT_USB_PRE; + } + break; + case APCH_STATE_CSTATE_FAST: + if (acin_state) { + if (chgin_level) + *val = MAX_CURRENT_AC_HIGH; + else + *val = MAX_CURRENT_AC_LOW; + } else { + if (chgin_level) + *val = MAX_CURRENT_USB_HIGH; + else + *val = MAX_CURRENT_USB_LOW; + } + break; + case APCH_STATE_CSTATE_EOC: + case APCH_STATE_CSTATE_DISABLED: + default: + *val = 0; + 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_CURRENT_MAX, POWER_SUPPLY_PROP_MODEL_NAME, POWER_SUPPLY_PROP_MANUFACTURER }; @@ -300,6 +368,10 @@ static int act8945a_charger_get_property(struct power_supply *psy, ret = act8945a_get_capacity_level(charger, regmap, &val->intval); break; + case POWER_SUPPLY_PROP_CURRENT_MAX: + ret = act8945a_get_current_max(charger, + regmap, &val->intval); + break; case POWER_SUPPLY_PROP_MODEL_NAME: val->strval = act8945a_charger_model; break; @@ -390,13 +462,11 @@ static int act8945a_charger_config(struct device *dev, struct act8945a_charger *charger) { struct device_node *np = dev->of_node; - enum of_gpio_flags flags; struct regmap *regmap = charger->regmap; u32 total_time_out; u32 pre_time_out; u32 input_voltage_threshold; - int chglev_pin; int err, ret; unsigned int tmp; @@ -431,12 +501,13 @@ static int act8945a_charger_config(struct device *dev, 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); - - if (gpio_is_valid(chglev_pin)) { - gpio_set_value(chglev_pin, - ((flags == OF_GPIO_ACTIVE_LOW) ? 0 : 1)); + charger->chglev_gpio = devm_gpiod_get_optional(dev, + "active-semi,chglev", + GPIOD_IN); + if (IS_ERR(charger->chglev_gpio)) { + err = PTR_ERR(charger->chglev_gpio); + dev_err(dev, "unable to claim gpio \"chglev\": %d\n", err); + return err; } if (of_property_read_u32(np, |