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SubjectRe: [PATCH 4/4] power: supply: add AXP803/AXP813 AC and battery power supply support
Hi Oskari,

On Thu, Oct 04, 2018 at 10:34:10PM +0300, Oskari Lemmela wrote:
> AXP803 PMIC is register compatible with AXP813.
>
> Added support for AXP803/AXP813 AC power supply.
> AXP8x3 is capable to limit input current and minimum input voltage.
> Both of these register values are writeable.
>
> Signed-off-by: Oskari Lemmela <oskari@lemmela.net>
> ---
> drivers/iio/adc/axp20x_adc.c | 1 +
> drivers/mfd/axp20x.c | 22 ++-
> drivers/pinctrl/pinctrl-axp209.c | 1 +
> drivers/power/supply/axp20x_ac_power.c | 194 +++++++++++++++++++++++++
> drivers/power/supply/axp20x_battery.c | 3 +
> include/linux/mfd/axp20x.h | 1 +
> 6 files changed, 221 insertions(+), 1 deletion(-)
>

We usually want one commit per logical change. e.g. here, we would want
*at least* one commit for the ADC, one for the MFD, one for the pinctrl,
one for the battery, one for the AC.

> diff --git a/drivers/iio/adc/axp20x_adc.c b/drivers/iio/adc/axp20x_adc.c
> index 5be789269353..f919a16a8533 100644
> --- a/drivers/iio/adc/axp20x_adc.c
> +++ b/drivers/iio/adc/axp20x_adc.c
> @@ -641,6 +641,7 @@ static const struct axp_data axp813_data = {
> static const struct of_device_id axp20x_adc_of_match[] = {
> { .compatible = "x-powers,axp209-adc", .data = (void *)&axp20x_data, },
> { .compatible = "x-powers,axp221-adc", .data = (void *)&axp22x_data, },
> + { .compatible = "x-powers,axp803-adc", .data = (void *)&axp813_data, },
> { .compatible = "x-powers,axp813-adc", .data = (void *)&axp813_data, },
> { /* sentinel */ }
> };

Then it means AXP813 and AXP803 ADCs are identical. Use the compatible
of the AXP813, no need to add a compatible for each and every PMIC's ADC
that'll be compatible with one that already exists.

> diff --git a/drivers/mfd/axp20x.c b/drivers/mfd/axp20x.c
> index 0be511dd93d0..c540f17549d5 100644
> --- a/drivers/mfd/axp20x.c
> +++ b/drivers/mfd/axp20x.c
> @@ -731,8 +731,23 @@ static const struct mfd_cell axp803_cells[] = {
> .name = "axp221-pek",
> .num_resources = ARRAY_SIZE(axp803_pek_resources),
> .resources = axp803_pek_resources,
> + }, {
> + .name = "axp20x-regulator"
> + }, {
> + .name = "axp20x-gpio",
> + .of_compatible = "x-powers,axp803-gpio",
> + }, {
> + .name = "axp813-adc",
> + .of_compatible = "x-powers,axp803-adc",
> + }, {
> + .name = "axp20x-battery-power-supply",
> + .of_compatible = "x-powers,axp803-battery-power-supply",
> + }, {
> + .name = "axp20x-ac-power-supply",
> + .of_compatible = "x-powers,axp803-ac-power-supply",
> + .num_resources = ARRAY_SIZE(axp20x_ac_power_supply_resources),
> + .resources = axp20x_ac_power_supply_resources,
> },
> - { .name = "axp20x-regulator" },
> };
>
> static const struct mfd_cell axp806_self_working_cells[] = {
> @@ -778,6 +793,11 @@ static const struct mfd_cell axp813_cells[] = {
> }, {
> .name = "axp20x-battery-power-supply",
> .of_compatible = "x-powers,axp813-battery-power-supply",
> + }, {
> + .name = "axp20x-ac-power-supply",
> + .of_compatible = "x-powers,axp813-ac-power-supply",
> + .num_resources = ARRAY_SIZE(axp20x_ac_power_supply_resources),
> + .resources = axp20x_ac_power_supply_resources,
> },
> };
>
> diff --git a/drivers/pinctrl/pinctrl-axp209.c b/drivers/pinctrl/pinctrl-axp209.c
> index afd0b533c40a..21859579e0a2 100644
> --- a/drivers/pinctrl/pinctrl-axp209.c
> +++ b/drivers/pinctrl/pinctrl-axp209.c
> @@ -387,6 +387,7 @@ static int axp20x_build_funcs_groups(struct platform_device *pdev)
>
> static const struct of_device_id axp20x_pctl_match[] = {
> { .compatible = "x-powers,axp209-gpio", .data = &axp20x_data, },
> + { .compatible = "x-powers,axp803-gpio", .data = &axp813_data, },
> { .compatible = "x-powers,axp813-gpio", .data = &axp813_data, },
> { }
> };

Same here. No need for a new compatible.

> diff --git a/drivers/power/supply/axp20x_ac_power.c b/drivers/power/supply/axp20x_ac_power.c
> index 0771f951b11f..3247efb81cd1 100644
> --- a/drivers/power/supply/axp20x_ac_power.c
> +++ b/drivers/power/supply/axp20x_ac_power.c
> @@ -27,6 +27,23 @@
> #define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7)
> #define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6)
>
> +#define AXP8X3_PWR_ACIN_VHOLD GENMASK(5, 3)

I would add _MASK at the end to be extra explicit.

> +#define AXP8X3_PWR_ACIN_VHOLD_4_0V (0 << 3)
> +#define AXP8X3_PWR_ACIN_VHOLD_4_1V (1 << 3)
> +#define AXP8X3_PWR_ACIN_VHOLD_4_2V (2 << 3)
> +#define AXP8X3_PWR_ACIN_VHOLD_4_3V (3 << 3)
> +#define AXP8X3_PWR_ACIN_VHOLD_4_4V (4 << 3)
> +#define AXP8X3_PWR_ACIN_VHOLD_4_5V (5 << 3)
> +#define AXP8X3_PWR_ACIN_VHOLD_4_6V (6 << 3)
> +#define AXP8X3_PWR_ACIN_VHOLD_4_7V (7 << 3)

You could define a macro for that, e.g.:
#define AXP8X3_PWR_ACIN_VHOLD_mV_reg(x) ((((x) - 4000) / 100) << 3)
#define AXP8X3_PWR_ACIN_VHOLD_reg_mV(x) (((x) >> 3) * 100 + 4000)

> +#define AXP8X3_PWR_ACIN_CURR_LIMIT GENMASK(2, 0)

I would add _MASK at the end to be extra explicit.

> +#define AXP8X3_PWR_ACIN_CURR_1_5A 0
> +#define AXP8X3_PWR_ACIN_CURR_2_0A 1
> +#define AXP8X3_PWR_ACIN_CURR_2_5A 2
> +#define AXP8X3_PWR_ACIN_CURR_3_0A 3
> +#define AXP8X3_PWR_ACIN_CURR_3_5A 4
> +#define AXP8X3_PWR_ACIN_CURR_4_0A 5
> +

#define AXP8X3_PWR_ACIN_CURR_mA_reg(x) (((x) / 500) - 3)
#define AXP8X3_PWR_ACIN_CURR_reg_mA(x) (((x) + 3 ) * 500)

They are not very pretty macro names but I'll let you figure out one
that are easier to understand :)

Also, you might want to use µA/µV so that it returns directly the value
wanted by the power-supply subsystem.

> #define DRVNAME "axp20x-ac-power-supply"
>
> struct axp20x_ac_power {
> @@ -102,6 +119,72 @@ static int axp20x_ac_power_get_property(struct power_supply *psy,
>
> return 0;
>
> + case POWER_SUPPLY_PROP_VOLTAGE_MIN:
> + ret = regmap_read(power->regmap, AXP803_ACIN_PATH_CTRL, &reg);
> + if (ret)
> + return ret;
> +

val->intval = AXP8X3_PWR_ACIN_VHOLD_reg_mV(reg & AXP8X3_PWR_ACIN_VHOLD) * 1000;

return 0;

> + switch (reg & AXP8X3_PWR_ACIN_VHOLD) {
> + case AXP8X3_PWR_ACIN_VHOLD_4_0V:
> + val->intval = 4000000;
> + break;
> + case AXP8X3_PWR_ACIN_VHOLD_4_1V:
> + val->intval = 4100000;
> + break;
> + case AXP8X3_PWR_ACIN_VHOLD_4_2V:
> + val->intval = 4200000;
> + break;
> + case AXP8X3_PWR_ACIN_VHOLD_4_3V:
> + val->intval = 4300000;
> + break;
> + case AXP8X3_PWR_ACIN_VHOLD_4_4V:
> + val->intval = 4400000;
> + break;
> + case AXP8X3_PWR_ACIN_VHOLD_4_5V:
> + val->intval = 4500000;
> + break;
> + case AXP8X3_PWR_ACIN_VHOLD_4_6V:
> + val->intval = 4600000;
> + break;
> + case AXP8X3_PWR_ACIN_VHOLD_4_7V:
> + val->intval = 4700000;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +
> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> + ret = regmap_read(power->regmap, AXP803_ACIN_PATH_CTRL, &reg);
> + if (ret)
> + return ret;
> +

val->intval = AXP8X3_PWR_ACIN_CURR_reg_mA(reg & AXP8X3_PWR_ACIN_CURR_LIMIT) * 1000;

return 0;

> + switch (reg & AXP8X3_PWR_ACIN_CURR_LIMIT) {
> + case AXP8X3_PWR_ACIN_CURR_1_5A:
> + val->intval = 1500000;
> + break;
> + case AXP8X3_PWR_ACIN_CURR_2_0A:
> + val->intval = 2000000;
> + break;
> + case AXP8X3_PWR_ACIN_CURR_2_5A:
> + val->intval = 2500000;
> + break;
> + case AXP8X3_PWR_ACIN_CURR_3_0A:
> + val->intval = 3000000;
> + break;
> + case AXP8X3_PWR_ACIN_CURR_3_5A:
> + val->intval = 3500000;
> + break;
> + case AXP8X3_PWR_ACIN_CURR_4_0A:
> + val->intval = 4000000;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return 0;
> +
> default:
> return -EINVAL;
> }
> @@ -109,6 +192,88 @@ static int axp20x_ac_power_get_property(struct power_supply *psy,
> return -EINVAL;
> }
>
> +static int axp20x_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);
> + int setval;
> +
> + switch (psp) {
> + case POWER_SUPPLY_PROP_VOLTAGE_MIN:
> + switch (val->intval) {
> + case 4000000:
> + setval = AXP8X3_PWR_ACIN_VHOLD_4_0V;
> + break;
> + case 4100000:
> + setval = AXP8X3_PWR_ACIN_VHOLD_4_1V;
> + break;
> + case 4200000:
> + setval = AXP8X3_PWR_ACIN_VHOLD_4_2V;
> + break;
> + case 4300000:
> + setval = AXP8X3_PWR_ACIN_VHOLD_4_3V;
> + break;
> + case 4400000:
> + setval = AXP8X3_PWR_ACIN_VHOLD_4_4V;
> + break;
> + case 4500000:
> + setval = AXP8X3_PWR_ACIN_VHOLD_4_5V;
> + break;
> + case 4600000:
> + setval = AXP8X3_PWR_ACIN_VHOLD_4_6V;
> + break;
> + case 4700000:
> + setval = AXP8X3_PWR_ACIN_VHOLD_4_7V;
> + break;
> +
> + default:
> + return -EINVAL;
> + }
> + return regmap_update_bits(power->regmap, AXP803_ACIN_PATH_CTRL,
> + AXP8X3_PWR_ACIN_VHOLD, setval);
> +

return regmap_update_bits(power->regmap, AXP803_ACIN_PATH_CTRL,
AXP8X3_PWR_ACIN_VHOLD,
AXP8X3_PWR_ACIN_VHOLD_mV_reg(val->intval / 1000));

> + case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
> +
> + switch (val->intval) {
> + case 1500000:
> + setval = AXP8X3_PWR_ACIN_CURR_1_5A;
> + break;
> + case 2000000:
> + setval = AXP8X3_PWR_ACIN_CURR_2_0A;
> + break;
> + case 2500000:
> + setval = AXP8X3_PWR_ACIN_CURR_2_5A;
> + break;
> + case 3000000:
> + setval = AXP8X3_PWR_ACIN_CURR_3_0A;
> + break;
> + case 3500000:
> + setval = AXP8X3_PWR_ACIN_CURR_3_5A;
> + break;
> + case 4000000:
> + setval = AXP8X3_PWR_ACIN_CURR_4_0A;
> + break;
> + default:
> + return -EINVAL;
> + }
> + return regmap_update_bits(power->regmap, AXP803_ACIN_PATH_CTRL,
> + AXP8X3_PWR_ACIN_CURR_LIMIT, setval);
return regmap_update_bits(power->regmap, AXP803_ACIN_PATH_CTRL,
AXP8X3_PWR_ACIN_CURR_LIMIT,
AXP8X3_PWR_ACIN_CURR_LIMIT_mA_reg(val->intval / 1000));
> +
> + default:
> + return -EINVAL;
> + }
> +
> + return -EINVAL;
> +}
> +
> +static int axp20x_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 +288,14 @@ static enum power_supply_property axp22x_ac_power_properties[] = {
> POWER_SUPPLY_PROP_ONLINE,
> };
>
> +static enum power_supply_property axp8x3_ac_power_properties[] = {

I'll let Maxime or Chen-Yu confirm but I think we use the name of the
first PMIC in the family, so it would be axp813_ac_power_properties
even if it applies to multiple variants of the PMIC.

> + 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 +312,16 @@ static const struct power_supply_desc axp22x_ac_power_desc = {
> .get_property = axp20x_ac_power_get_property,
> };
>
> +static const struct power_supply_desc axp8x3_ac_power_desc = {
> + .name = "axp8x3-ac",
> + .type = POWER_SUPPLY_TYPE_MAINS,
> + .properties = axp8x3_ac_power_properties,
> + .num_properties = ARRAY_SIZE(axp8x3_ac_power_properties),

Naming convention here for the above.

> + .property_is_writeable = axp20x_ac_power_prop_writeable,

I think we would want axp813_ac_power_prop_writeable if it's applicable
only for the AXP813 and not the AXP20X.

> + .get_property = axp20x_ac_power_get_property,
> + .set_property = axp20x_ac_power_set_property,
> +};
> +
> struct axp_data {
> const struct power_supply_desc *power_desc;
> bool acin_adc;
> @@ -154,6 +337,11 @@ static const struct axp_data axp22x_data = {
> .acin_adc = false,
> };
>
> +static const struct axp_data axp8x3_data = {
> + .power_desc = &axp8x3_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 +422,12 @@ static const struct of_device_id axp20x_ac_power_match[] = {
> }, {
> .compatible = "x-powers,axp221-ac-power-supply",
> .data = &axp22x_data,
> + }, {
> + .compatible = "x-powers,axp803-ac-power-supply",
> + .data = &axp8x3_data,
> + }, {
> + .compatible = "x-powers,axp813-ac-power-supply",
> + .data = &axp8x3_data,

So AXP813 and AXP803 AC drivers are identical, use the same compatible,
no need to add two.

> }, { /* sentinel */ }
> };
> MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);
> diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
> index e84b6e4da14a..932027f4a993 100644
> --- a/drivers/power/supply/axp20x_battery.c
> +++ b/drivers/power/supply/axp20x_battery.c
> @@ -537,6 +537,9 @@ static const struct of_device_id axp20x_battery_ps_id[] = {
> }, {
> .compatible = "x-powers,axp221-battery-power-supply",
> .data = (void *)&axp221_data,
> + }, {
> + .compatible = "x-powers,axp803-battery-power-supply",
> + .data = (void *)&axp813_data,

Ditto.

> }, {
> .compatible = "x-powers,axp813-battery-power-supply",
> .data = (void *)&axp813_data,
> diff --git a/include/linux/mfd/axp20x.h b/include/linux/mfd/axp20x.h
> index 517e60eecbcb..23d58e243d01 100644
> --- a/include/linux/mfd/axp20x.h
> +++ b/include/linux/mfd/axp20x.h
> @@ -266,6 +266,7 @@ enum axp20x_variants {
> #define AXP288_RT_BATT_V_H 0xa0
> #define AXP288_RT_BATT_V_L 0xa1
>
> +#define AXP803_ACIN_PATH_CTRL 0x3a
> #define AXP813_ADC_RATE 0x85
>

Basically, the only changes you need to keep are those in
drivers/power/supply/axp20x_ac_power.c and include/linux/mfd/axp20x.h.

Thanks,
Quentin
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