Re: [PATCH v4 11/15] power: supply: axp20x_usb_power: Add support for AXP192

From: Andy Shevchenko
Date: Thu Jun 30 2022 - 04:00:47 EST

On Wed, Jun 29, 2022 at 4:30 PM Aidan MacDonald
<aidanmacdonald.0x0@xxxxxxxxx> wrote:
>
> The AXP192's USB power supply is similar to the AXP202 but it has
> different USB current limits and a different offset for the VBUS
> status register.

Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>

> Acked-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx>
> Reviewed-by: Chen-Yu Tsai <wens@xxxxxxxx>
> Signed-off-by: Aidan MacDonald <aidanmacdonald.0x0@xxxxxxxxx>
> ---
> drivers/power/supply/axp20x_usb_power.c | 84 +++++++++++++++++++++----
> 1 file changed, 73 insertions(+), 11 deletions(-)
>
> diff --git a/drivers/power/supply/axp20x_usb_power.c b/drivers/power/supply/axp20x_usb_power.c
> index a1e6d1d44808..f83e2ed6d507 100644
> --- a/drivers/power/supply/axp20x_usb_power.c
> +++ b/drivers/power/supply/axp20x_usb_power.c
> @@ -48,6 +48,9 @@
> #define AXP813_VBUS_CLIMIT_2000mA 2
> #define AXP813_VBUS_CLIMIT_2500mA 3
>
> +#define AXP192_VBUS_CLIMIT_EN BIT(1)
> +#define AXP192_VBUS_CLIMIT_100mA BIT(0)
> +
> #define AXP20X_ADC_EN1_VBUS_CURR BIT(2)
> #define AXP20X_ADC_EN1_VBUS_VOLT BIT(3)
>
> @@ -121,6 +124,25 @@ static void axp20x_usb_power_poll_vbus(struct work_struct *work)
> mod_delayed_work(system_power_efficient_wq, &power->vbus_detect, DEBOUNCE_TIME);
> }
>
> +static int axp192_get_current_max(struct axp20x_usb_power *power, int *val)
> +{
> + unsigned int v;
> + int ret;
> +
> + ret = regmap_read(power->regmap, AXP20X_VBUS_IPSOUT_MGMT, &v);
> + if (ret)
> + return ret;
> +
> + if (!(v & AXP192_VBUS_CLIMIT_EN))
> + *val = -1;
> + else if (v & AXP192_VBUS_CLIMIT_100mA)
> + *val = 100000;
> + else
> + *val = 500000;
> +
> + return 0;
> +}
> +
> static int axp20x_get_current_max(struct axp20x_usb_power *power, int *val)
> {
> unsigned int v;
> @@ -179,7 +201,7 @@ static int axp20x_usb_power_get_property(struct power_supply *psy,
> enum power_supply_property psp, union power_supply_propval *val)
> {
> struct axp20x_usb_power *power = power_supply_get_drvdata(psy);
> - unsigned int input, v;
> + unsigned int input, v, reg;
> int ret;
>
> switch (psp) {
> @@ -215,6 +237,8 @@ static int axp20x_usb_power_get_property(struct power_supply *psy,
> case POWER_SUPPLY_PROP_CURRENT_MAX:
> if (power->axp20x_id == AXP813_ID)
> return axp813_get_current_max(power, &val->intval);
> + else if (power->axp20x_id == AXP192_ID)
> + return axp192_get_current_max(power, &val->intval);
> return axp20x_get_current_max(power, &val->intval);
> case POWER_SUPPLY_PROP_CURRENT_NOW:
> if (IS_ENABLED(CONFIG_AXP20X_ADC)) {
> @@ -256,16 +280,19 @@ static int axp20x_usb_power_get_property(struct power_supply *psy,
>
> val->intval = POWER_SUPPLY_HEALTH_GOOD;
>
> - if (power->axp20x_id == AXP202_ID) {
> - ret = regmap_read(power->regmap,
> - AXP20X_USB_OTG_STATUS, &v);
> - if (ret)
> - return ret;
> + if (power->axp20x_id == AXP192_ID)
> + reg = AXP192_USB_OTG_STATUS;
> + else if (power->axp20x_id == AXP202_ID)
> + reg = AXP20X_USB_OTG_STATUS;
> + else
> + break; /* Other chips lack the OTG status register */
>
> - if (!(v & AXP20X_USB_STATUS_VBUS_VALID))
> - val->intval =
> - POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
> - }
> + ret = regmap_read(power->regmap, reg, &v);
> + if (ret)
> + return ret;
> +
> + if (!(v & AXP20X_USB_STATUS_VBUS_VALID))
> + val->intval = POWER_SUPPLY_HEALTH_UNSPEC_FAILURE;
> break;
> case POWER_SUPPLY_PROP_PRESENT:
> val->intval = !!(input & AXP20X_PWR_STATUS_VBUS_PRESENT);
> @@ -316,6 +343,28 @@ static int axp20x_usb_power_set_voltage_min(struct axp20x_usb_power *power,
> return -EINVAL;
> }
>
> +static int axp192_usb_power_set_current_max(struct axp20x_usb_power *power,
> + int intval)
> +{
> + const unsigned int mask = AXP192_VBUS_CLIMIT_EN |
> + AXP192_VBUS_CLIMIT_100mA;
> + unsigned int val;
> +
> + switch (intval) {
> + case 100000:
> + val = AXP192_VBUS_CLIMIT_EN | AXP192_VBUS_CLIMIT_100mA;
> + break;
> + case 500000:
> + val = AXP192_VBUS_CLIMIT_EN;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + return regmap_update_bits(power->regmap,
> + AXP20X_VBUS_IPSOUT_MGMT, mask, val);
> +}
> +
> static int axp813_usb_power_set_current_max(struct axp20x_usb_power *power,
> int intval)
> {
> @@ -383,6 +432,9 @@ static int axp20x_usb_power_set_property(struct power_supply *psy,
> if (power->axp20x_id == AXP813_ID)
> return axp813_usb_power_set_current_max(power,
> val->intval);
> + else if (power->axp20x_id == AXP192_ID)
> + return axp192_usb_power_set_current_max(power,
> + val->intval);
> return axp20x_usb_power_set_current_max(power, val->intval);
>
> default:
> @@ -468,6 +520,13 @@ struct axp_data {
> enum axp20x_variants axp20x_id;
> };
>
> +static const struct axp_data axp192_data = {
> + .power_desc = &axp20x_usb_power_desc,
> + .irq_names = axp20x_irq_names,
> + .num_irq_names = ARRAY_SIZE(axp20x_irq_names),
> + .axp20x_id = AXP192_ID,
> +};
> +
> static const struct axp_data axp202_data = {
> .power_desc = &axp20x_usb_power_desc,
> .irq_names = axp20x_irq_names,
> @@ -600,7 +659,7 @@ static int axp20x_usb_power_probe(struct platform_device *pdev)
> if (ret)
> return ret;
>
> - if (power->axp20x_id == AXP202_ID) {
> + if (power->axp20x_id == AXP192_ID || power->axp20x_id == AXP202_ID) {
> /* Enable vbus valid checking */
> ret = regmap_update_bits(power->regmap, AXP20X_VBUS_MON,
> AXP20X_VBUS_MON_VBUS_VALID,
> @@ -659,6 +718,9 @@ static int axp20x_usb_power_probe(struct platform_device *pdev)
>
> static const struct of_device_id axp20x_usb_power_match[] = {
> {
> + .compatible = "x-powers,axp192-usb-power-supply",
> + .data = &axp192_data,
> + }, {
> .compatible = "x-powers,axp202-usb-power-supply",
> .data = &axp202_data,
> }, {
> --
> 2.35.1
>


--
With Best Regards,
Andy Shevchenko