AXP20X and AXP22X PMICs allow setting the min voltage and max current of VBUS power supply. This adds entries in sysfs to allow to do so.
Signed-off-by: Quentin Schulz <[email protected]> --- drivers/power/supply/axp20x_usb_power.c | 72 +++++++++++++++++++++++++++++++++ include/linux/mfd/axp20x.h | 3 ++ 2 files changed, 75 insertions(+) diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c index b19754e..638cb52 100644 --- a/drivers/power/supply/axp20x_usb_power.c +++ b/drivers/power/supply/axp20x_usb_power.c @@ -155,6 +155,74 @@ static int axp20x_usb_power_get_property(struct power_supply *psy, return 0; } +static int axp20x_usb_power_set_property(struct power_supply *psy, + enum power_supply_property psp, + const union power_supply_propval *val) +{ + struct axp20x_usb_power *power = power_supply_get_drvdata(psy); + int ret, val1; + + switch (psp) { + case POWER_SUPPLY_PROP_VOLTAGE_MIN: + switch (val->intval) { + case 4000000: + case 4100000: + case 4200000: + case 4300000: + case 4400000: + case 4500000: + case 4600000: + case 4700000: + val1 = (val->intval - 4000000) / 100000; + ret = regmap_update_bits(power->regmap, + AXP20X_VBUS_IPSOUT_MGMT, + AXP20X_VBUS_VHOLD_MASK, + val1 << 3); + if (ret) + return ret; + + return 0; + default: + return -EINVAL; + } + + return 0; + + case POWER_SUPPLY_PROP_CURRENT_MAX: + switch (val->intval) { + case 100000: + if (power->axp20x_id == AXP221_ID) + return -EINVAL; + case 500000: + case 900000: + val1 = (900000 - val->intval) / 400000; + ret = regmap_update_bits(power->regmap, + AXP20X_VBUS_IPSOUT_MGMT, + AXP20X_VBUS_CLIMIT_MASK, val1); + if (ret) + return ret; + + return 0; + default: + return -EINVAL; + } + + return 0; + + default: + return -EINVAL; + } + + return 0; +} + +static int axp20x_usb_power_prop_writeable(struct power_supply *psy, + enum power_supply_property psp) +{ + return psp == POWER_SUPPLY_PROP_VOLTAGE_MIN || + psp == POWER_SUPPLY_PROP_CURRENT_MAX; +} + static enum power_supply_property axp20x_usb_power_properties[] = { POWER_SUPPLY_PROP_HEALTH, POWER_SUPPLY_PROP_PRESENT, @@ -178,7 +246,9 @@ static const struct power_supply_desc axp20x_usb_power_desc = { .type = POWER_SUPPLY_TYPE_USB, .properties = axp20x_usb_power_properties, .num_properties = ARRAY_SIZE(axp20x_usb_power_properties), + .property_is_writeable = axp20x_usb_power_prop_writeable, .get_property = axp20x_usb_power_get_property, + .set_property = axp20x_usb_power_set_property, }; static const struct power_supply_desc axp22x_usb_power_desc = { @@ -186,7 +256,9 @@ static const struct power_supply_desc axp22x_usb_power_desc = { .type = POWER_SUPPLY_TYPE_USB, .properties = axp22x_usb_power_properties, .num_properties = ARRAY_SIZE(axp22x_usb_power_properties), + .property_is_writeable = axp20x_usb_power_prop_writeable, .get_property = axp20x_usb_power_get_property, + .set_property = axp20x_usb_power_set_property, }; static const struct of_device_id axp20x_usb_power_match[] = { diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h index fec597f..8883595 100644 --- a/include/linux/mfd/axp20x.h +++ b/include/linux/mfd/axp20x.h @@ -56,6 +56,9 @@ enum { #define AXP20X_LDO24_V_OUT 0x28 #define AXP20X_LDO3_V_OUT 0x29 #define AXP20X_VBUS_IPSOUT_MGMT 0x30 + +#define AXP20X_VBUS_VHOLD_MASK GENMASK(5, 3) + #define AXP20X_V_OFF 0x31 #define AXP20X_OFF_CTRL 0x32 #define AXP20X_CHRG_CTRL1 0x33 -- 2.9.3
