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power: supply: add AC power supply driver for AXP813 

AXP813 and AXP803 PMICs can control input current and minimum voltage.

Both of these values are configurable.

Signed-off-by: Oskari Lemmela <oskari@lemmela.net>
Reviewed-by: Quentin Schulz <quentin.schulz@bootlin.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Oskari Lemmela 2018-11-20 19:52:09 +02:00 committed by Sebastian Reichel
parent 89d21972da
commit 7693b5643f
2 changed files with 95 additions and 0 deletions
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94
drivers/power/supply/axp20x_ac_power.c
View File

@ -27,6 +27,16 @@
#define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7)
#define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6)
#define AXP813_VHOLD_MASK GENMASK(5, 3)
#define AXP813_VHOLD_UV_TO_BIT(x) ((((x) / 100000) - 40) << 3)
#define AXP813_VHOLD_REG_TO_UV(x) \
(((((x) & AXP813_VHOLD_MASK) >> 3) + 40) * 100000)
#define AXP813_CURR_LIMIT_MASK GENMASK(2, 0)
#define AXP813_CURR_LIMIT_UA_TO_BIT(x) (((x) / 500000) - 3)
#define AXP813_CURR_LIMIT_REG_TO_UA(x) \
((((x) & AXP813_CURR_LIMIT_MASK) + 3) * 500000)
#define DRVNAME "axp20x-ac-power-supply"
struct axp20x_ac_power {
@ -102,6 +112,27 @@ static int axp20x_ac_power_get_property(struct power_supply *psy,
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, &reg);
if (ret)
return ret;
val->intval = AXP813_VHOLD_REG_TO_UV(reg);
return 0;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, &reg);
if (ret)
return ret;
val->intval = AXP813_CURR_LIMIT_REG_TO_UA(reg);
/* AXP813 datasheet defines values 11x as 4000mA */
if (val->intval > 4000000)
val->intval = 4000000;
return 0;
default:
return -EINVAL;
}
@ -109,6 +140,43 @@ static int axp20x_ac_power_get_property(struct power_supply *psy,
return -EINVAL;
}
static int axp813_ac_power_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
if (val->intval < 4000000 || val->intval > 4700000)
return -EINVAL;
return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
AXP813_VHOLD_MASK,
AXP813_VHOLD_UV_TO_BIT(val->intval));
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
if (val->intval < 1500000 || val->intval > 4000000)
return -EINVAL;
return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
AXP813_CURR_LIMIT_MASK,
AXP813_CURR_LIMIT_UA_TO_BIT(val->intval));
default:
return -EINVAL;
}
return -EINVAL;
}
static int axp813_ac_power_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
}
static enum power_supply_property axp20x_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
@ -123,6 +191,14 @@ static enum power_supply_property axp22x_ac_power_properties[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static enum power_supply_property axp813_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
};
static const struct power_supply_desc axp20x_ac_power_desc = {
.name = "axp20x-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
@ -139,6 +215,16 @@ static const struct power_supply_desc axp22x_ac_power_desc = {
.get_property = axp20x_ac_power_get_property,
};
static const struct power_supply_desc axp813_ac_power_desc = {
.name = "axp813-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = axp813_ac_power_properties,
.num_properties = ARRAY_SIZE(axp813_ac_power_properties),
.property_is_writeable = axp813_ac_power_prop_writeable,
.get_property = axp20x_ac_power_get_property,
.set_property = axp813_ac_power_set_property,
};
struct axp_data {
const struct power_supply_desc *power_desc;
bool acin_adc;
@ -154,6 +240,11 @@ static const struct axp_data axp22x_data = {
.acin_adc = false,
};
static const struct axp_data axp813_data = {
.power_desc = &axp813_ac_power_desc,
.acin_adc = false,
};
static int axp20x_ac_power_probe(struct platform_device *pdev)
{
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
@ -234,6 +325,9 @@ static const struct of_device_id axp20x_ac_power_match[] = {
}, {
.compatible = "x-powers,axp221-ac-power-supply",
.data = &axp22x_data,
}, {
.compatible = "x-powers,axp813-ac-power-supply",
.data = &axp813_data,
}, { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);

1
include/linux/mfd/axp20x.h
View File

@ -266,6 +266,7 @@ enum axp20x_variants {
#define AXP288_RT_BATT_V_H 0xa0
#define AXP288_RT_BATT_V_L 0xa1
#define AXP813_ACIN_PATH_CTRL 0x3a
#define AXP813_ADC_RATE 0x85
/* Fuel Gauge */