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Commit 7693b564 authored by Oskari Lemmela's avatar Oskari Lemmela Committed by Sebastian Reichel
Browse files

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: default avatarOskari Lemmela <oskari@lemmela.net>
Reviewed-by: default avatarQuentin Schulz <quentin.schulz@bootlin.com>
Reviewed-by: default avatarChen-Yu Tsai <wens@csie.org>
Acked-by: default avatarLee Jones <lee.jones@linaro.org>
Signed-off-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
parent 89d21972

drivers/power/supply/axp20x_ac_power.c

+94 −0
Original line number Diff line number Diff line
@@ -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 +112,57 @@ 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;

	}



	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;

	}
@@ -109,6 +170,13 @@ static int axp20x_ac_power_get_property(struct power_supply *psy, 
	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);

include/linux/mfd/axp20x.h

+1 −0
Original line number Diff line number Diff line
@@ -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 */