power: supply: axp20x_battery: allow disabling battery charging
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>
diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
index e84b6e4..18a9db0 100644
--- a/drivers/power/supply/axp20x_battery.c
+++ b/drivers/power/supply/axp20x_battery.c
@@ -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;