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power: supply: axp20x_battery: allow disabling battery charging

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Allow disabling and re-enabling battery charging of an axp209 PMIC
through a writable status property. With the current driver code
charging is always on.

This works on the axp209 of Banana {Pi M1+,Pro} and should work on all
AXP chips.

Signed-off-by: Hermann.Lauer@uni-heidelberg.de
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Hermann Lauer 2021-05-12 12:58:56 +02:00 committed by Sebastian Reichel
parent cd70c85c57
commit 6a0fcc87c9
1 changed files with 14 additions and 1 deletions
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15
drivers/power/supply/axp20x_battery.c
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@ -40,6 +40,7 @@
#define AXP209_FG_PERCENT GENMASK(6, 0)
#define AXP22X_FG_VALID BIT(7)
#define AXP20X_CHRG_CTRL1_ENABLE BIT(7)
#define AXP20X_CHRG_CTRL1_TGT_VOLT GENMASK(6, 5)
#define AXP20X_CHRG_CTRL1_TGT_4_1V (0 << 5)
#define AXP20X_CHRG_CTRL1_TGT_4_15V (1 << 5)
@ -468,7 +469,18 @@ static int axp20x_battery_set_prop(struct power_supply *psy,
case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX:
return axp20x_set_max_constant_charge_current(axp20x_batt,
val->intval);
case POWER_SUPPLY_PROP_STATUS:
switch (val->intval) {
case POWER_SUPPLY_STATUS_CHARGING:
return regmap_update_bits(axp20x_batt->regmap, AXP20X_CHRG_CTRL1,
AXP20X_CHRG_CTRL1_ENABLE, AXP20X_CHRG_CTRL1_ENABLE);
case POWER_SUPPLY_STATUS_DISCHARGING:
case POWER_SUPPLY_STATUS_NOT_CHARGING:
return regmap_update_bits(axp20x_batt->regmap, AXP20X_CHRG_CTRL1,
AXP20X_CHRG_CTRL1_ENABLE, 0);
}
fallthrough;
default:
return -EINVAL;
}
@ -491,7 +503,8 @@ static enum power_supply_property axp20x_battery_props[] = {
static int axp20x_battery_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN ||
return psp == POWER_SUPPLY_PROP_STATUS ||
psp == POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN ||
psp == POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN ||
psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT ||
psp == POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX;