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Date: Fri, 5 Oct 2018 21:28:46 +0300
From: Oskari Lemmelä <oskari@...mela.net>
To: Quentin Schulz <quentin.schulz@...tlin.com>
Cc: Maxime Ripard <maxime.ripard@...tlin.com>,
Sebastian Reichel <sre@...nel.org>,
Jonathan Cameron <jic23@...nel.org>,
Chen-Yu Tsai <wens@...e.org>,
Mark Rutland <mark.rutland@....com>,
Rob Herring <robh+dt@...nel.org>,
Linus Walleij <linus.walleij@...aro.org>,
Hartmut Knaack <knaack.h@....de>,
Lars-Peter Clausen <lars@...afoo.de>,
Peter Meerwald-Stadler <pmeerw@...erw.net>,
Lee Jones <lee.jones@...aro.org>,
Quentin Schulz <quentin.schulz@...e-electrons.com>,
linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
linux-pm@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 4/4] power: supply: add AXP803/AXP813 AC and battery power
supply support
Hi Quentin,
On 05.10.2018 11:29, Quentin Schulz wrote:
> 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@...mela.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.
This was my very first kernel patch. I was thinking based on git log that
I should split commits even more. Now I know and do this in next versions.
>> 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.
Understood. I suppose if some feature doesn't work for both models then
we have to do new compatible?
>> 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.
Good idea. I'll change that in both places.
>> +#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.
Thanks. This way code will be much more compact. I'll try think
better macro names.
>> #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, ®);
>> + 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, ®);
>> + 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.
Makes sense. I'll replace all axp803,axp8x3 strings with axp813 ones.
>> + 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.
Noted.
>> + .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
I'll refactor code and commits based on these comments.
Thanks,
Oskari
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