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Subject[PATCH] power: supply: axp20x_battery: implement writeable status to enable/disable battery charging
Dear Maintainers,

this patch allows enabling/disabling charging for the axp209 PMIC through a
writeable status property.

This works on the axp209 of Banana {Pi M1+,Pro}. I have no access to
the other chips the driver deals with.

Thanks to ChenYu for the idea and greetings
Hermann

Signed-off-by: Hermann.Lauer@uni-heidelberg.de
---
drivers/power/supply/axp20x_battery.c | 16 ++++++++++++++--
1 file changed, 14 insertions(+), 2 deletions(-)

diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
--- 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 +469,17 @@
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);
+ }
default:
return -EINVAL;
}
@@ -491,7 +502,8 @@
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;
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