Hi,
On Thu, Aug 24, 2023 at 03:13:31PM +0200, Emmanuel Gil Peyrot wrote:
> From: Alexandre Courbot <acourbot@xxxxxxxxxx>
>
> This prevents the charger from ever going over the current limit.
>
> Signed-off-by: Alexandre Courbot <acourbot@xxxxxxxxxx>
> Signed-off-by: Emmanuel Gil Peyrot <linkmauve@xxxxxxxxxxxx>
> ---
This would need to be documented in the DT binding, but it
duplicates control for POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT
anyways. Please introduce DT property "input-current-limit-microamp"
for this driver, just like e.g. bq2515x_charger.c (and update the DT
binding accordingly).
-- Sebastian
> drivers/power/supply/bq24190_charger.c | 82 ++++++++++++++++++++++++++
> 1 file changed, 82 insertions(+)
>
> diff --git a/drivers/power/supply/bq24190_charger.c b/drivers/power/supply/bq24190_charger.c
> index a56122b39687..cc1bd87f4982 100644
> --- a/drivers/power/supply/bq24190_charger.c
> +++ b/drivers/power/supply/bq24190_charger.c
> @@ -530,6 +530,79 @@ static int bq24190_set_otg_vbus(struct bq24190_dev_info *bdi, bool enable)
> }
>
> #ifdef CONFIG_REGULATOR
> +static int bq24190_set_charging_current(struct regulator_dev *dev,
> + int min_uA, int max_uA)
> +{
> + struct bq24190_dev_info *bdi = rdev_get_drvdata(dev);
> + u8 ss_reg;
> + int in_current_limit;
> + int ret = 0;
> +
> + ret = bq24190_read(bdi, BQ24190_REG_SS, &ss_reg);
> + if (ret < 0)
> + goto error;
> +
> + if (max_uA == 0 && ss_reg != 0)
> + return ret;
> +
> + if (!(ss_reg & BQ24190_REG_SS_VBUS_STAT_MASK))
> + in_current_limit = 500;
> + else
> + in_current_limit = max_uA / 1000;
> +
> + return bq24190_set_field_val(bdi, BQ24190_REG_ISC,
> + BQ24190_REG_ISC_IINLIM_MASK,
> + BQ24190_REG_ISC_IINLIM_SHIFT,
> + bq24190_isc_iinlim_values,
> + ARRAY_SIZE(bq24190_isc_iinlim_values),
> + in_current_limit);
> +error:
> + dev_err(bdi->dev, "Charger enable failed, err = %d\n", ret);
> + return ret;
> +}
> +
> +static const struct regulator_ops bq24190_chrg_ops = {
> + .set_current_limit = bq24190_set_charging_current,
> +};
> +
> +static const struct regulator_desc bq24190_chrg_desc = {
> + .name = "charger",
> + .of_match = "charger",
> + .type = REGULATOR_CURRENT,
> + .owner = THIS_MODULE,
> + .ops = &bq24190_chrg_ops,
> +};
> +
> +static const struct regulator_init_data bq24190_chrg_init_data = {
> + .constraints = {
> + .valid_ops_mask = REGULATOR_CHANGE_STATUS | REGULATOR_CHANGE_CURRENT,
> + .min_uA = 0,
> + .max_uA = 3000000,
> + },
> +};
> +
> +static int bq24190_register_chrg_regulator(struct bq24190_dev_info *bdi)
> +{
> + struct bq24190_platform_data *pdata = bdi->dev->platform_data;
> + struct regulator_config cfg = { };
> + struct regulator_dev *reg;
> + int ret = 0;
> +
> + cfg.dev = bdi->dev;
> + if (pdata && pdata->regulator_init_data)
> + cfg.init_data = pdata->regulator_init_data;
> + else
> + cfg.init_data = &bq24190_chrg_init_data;
> + cfg.driver_data = bdi;
> + reg = devm_regulator_register(bdi->dev, &bq24190_chrg_desc, &cfg);
> + if (IS_ERR(reg)) {
> + ret = PTR_ERR(reg);
> + dev_err(bdi->dev, "Can't register regulator: %d\n", ret);
> + }
> +
> + return ret;
> +}
> +
> static int bq24190_vbus_enable(struct regulator_dev *dev)
> {
> return bq24190_set_otg_vbus(rdev_get_drvdata(dev), true);
> @@ -611,6 +684,11 @@ static int bq24190_register_vbus_regulator(struct bq24190_dev_info *bdi)
> return ret;
> }
> #else
> +static int bq24190_register_chrg_regulator(struct bq24190_dev_info *bdi)
> +{
> + return 0;
> +}
> +
> static int bq24190_register_vbus_regulator(struct bq24190_dev_info *bdi)
> {
> return 0;
> @@ -1879,6 +1957,10 @@ static int bq24190_probe(struct i2c_client *client)
> goto out_charger;
> }
>
> + ret = bq24190_register_chrg_regulator(bdi);
> + if (ret < 0)
> + goto out_charger;
> +
> ret = bq24190_register_vbus_regulator(bdi);
> if (ret < 0)
> goto out_charger;
> --
> 2.42.0
>
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