Re: [PATCH v3 10/16] power: supply: axp20x_battery: use data structure instead of ID for

[Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>]

On Mon, Jan 15, 2018 at 6:33 PM, Quentin Schulz
<quentin.schulz-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org> wrote:
> variant specific code

Your subject somehow got wrapped incorrectly.

>
> We used to use IDs to select a function or a feature depending on the
> variant. It's easier to maintain the code by adding data structure
> storing the few differences between variants so that we don't add a pile
> of if conditions.
>
> Let's use this data structure and update the code to use it.
>
> Signed-off-by: Quentin Schulz <quentin.schulz-wi1+55ScJUtKEb57/3fJTNBPR1lH4CV8@public.gmane.org>
> ---
>  drivers/power/supply/axp20x_battery.c | 100 +++++++++++++++++----------
>  1 file changed, 66 insertions(+), 34 deletions(-)
>
> diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
> index 7494f0f..d73c78f 100644
> --- a/drivers/power/supply/axp20x_battery.c
> +++ b/drivers/power/supply/axp20x_battery.c
> @@ -53,6 +53,16 @@
>
>  #define AXP20X_V_OFF_MASK              GENMASK(2, 0)
>
> +struct axp20x_batt_ps;
> +
> +struct axp_data {
> +       int     ccc_scale;
> +       int     ccc_offset;
> +       bool    has_fg_valid;
> +       int     (*get_max_voltage)(struct axp20x_batt_ps *batt, int *val);
> +       int     (*set_max_voltage)(struct axp20x_batt_ps *batt, int val);
> +};
> +
>  struct axp20x_batt_ps {
>         struct regmap *regmap;
>         struct power_supply *batt;
> @@ -62,7 +72,7 @@ struct axp20x_batt_ps {
>         struct iio_channel *batt_v;
>         /* Maximum constant charge current */
>         unsigned int max_ccc;
> -       u8 axp_id;
> +       struct axp_data *data;

const.

>  };
>
>  static int axp20x_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt,
> @@ -123,22 +133,6 @@ static int axp22x_battery_get_max_voltage(struct axp20x_batt_ps *axp20x_batt,
>         return 0;
>  }
>
> -static void raw_to_constant_charge_current(struct axp20x_batt_ps *axp, int *val)
> -{
> -       if (axp->axp_id == AXP209_ID)
> -               *val = *val * 100000 + 300000;
> -       else
> -               *val = *val * 150000 + 300000;
> -}
> -
> -static void constant_charge_current_to_raw(struct axp20x_batt_ps *axp, int *val)
> -{
> -       if (axp->axp_id == AXP209_ID)
> -               *val = (*val - 300000) / 100000;
> -       else
> -               *val = (*val - 300000) / 150000;
> -}
> -
>  static int axp20x_get_constant_charge_current(struct axp20x_batt_ps *axp,
>                                               int *val)
>  {
> @@ -150,7 +144,7 @@ static int axp20x_get_constant_charge_current(struct axp20x_batt_ps *axp,
>
>         *val &= AXP20X_CHRG_CTRL1_TGT_CURR;
>
> -       raw_to_constant_charge_current(axp, val);
> +       *val = *val * axp->data->ccc_scale + axp->data->ccc_offset;
>
>         return 0;
>  }
> @@ -269,8 +263,7 @@ static int axp20x_battery_get_prop(struct power_supply *psy,
>                 if (ret)
>                         return ret;
>
> -               if (axp20x_batt->axp_id == AXP221_ID &&
> -                   !(reg & AXP22X_FG_VALID))
> +               if (axp20x_batt->data->has_fg_valid && !(reg & AXP22X_FG_VALID))
>                         return -EINVAL;
>
>                 /*
> @@ -281,11 +274,8 @@ static int axp20x_battery_get_prop(struct power_supply *psy,
>                 break;
>
>         case POWER_SUPPLY_PROP_VOLTAGE_MAX_DESIGN:
> -               if (axp20x_batt->axp_id == AXP209_ID)
> -                       return axp20x_battery_get_max_voltage(axp20x_batt,
> -                                                             &val->intval);
> -               return axp22x_battery_get_max_voltage(axp20x_batt,
> -                                                     &val->intval);
> +               return axp20x_batt->data->get_max_voltage(axp20x_batt,
> +                                                         &val->intval);
>
>         case POWER_SUPPLY_PROP_VOLTAGE_MIN_DESIGN:
>                 ret = regmap_read(axp20x_batt->regmap, AXP20X_V_OFF, &reg);
> @@ -312,6 +302,32 @@ static int axp20x_battery_get_prop(struct power_supply *psy,
>         return 0;
>  }
>
> +static int axp22x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
> +                                         int val)
> +{
> +       switch (val) {
> +       case 4100000:
> +               val = AXP20X_CHRG_CTRL1_TGT_4_1V;
> +               break;
> +
> +       case 4200000:
> +               val = AXP20X_CHRG_CTRL1_TGT_4_2V;
> +               break;
> +
> +       default:
> +               /*
> +                * AXP20x max voltage can be set to 4.36V and AXP22X max voltage
> +                * can be set to 4.22V and 4.24V, but these voltages are too
> +                * high for Lithium based batteries (AXP PMICs are supposed to
> +                * be used with these kinds of battery).
> +                */
> +               return -EINVAL;
> +       }
> +
> +       return regmap_update_bits(axp20x_batt->regmap, AXP20X_CHRG_CTRL1,
> +                                 AXP20X_CHRG_CTRL1_TGT_VOLT, val);
> +}
> +
>  static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
>                                           int val)
>  {
> @@ -321,9 +337,6 @@ static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
>                 break;
>
>         case 4150000:
> -               if (axp20x_batt->axp_id == AXP221_ID)
> -                       return -EINVAL;
> -
>                 val = AXP20X_CHRG_CTRL1_TGT_4_15V;
>                 break;
>
> @@ -351,7 +364,8 @@ static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt,
>         if (charge_current > axp_batt->max_ccc)
>                 return -EINVAL;
>
> -       constant_charge_current_to_raw(axp_batt, &charge_current);
> +       charge_current = (charge_current - axp_batt->data->ccc_offset) /
> +               axp_batt->data->ccc_scale;
>
>         if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
>                 return -EINVAL;
> @@ -365,12 +379,14 @@ static int axp20x_set_max_constant_charge_current(struct axp20x_batt_ps *axp,
>  {
>         bool lower_max = false;
>
> -       constant_charge_current_to_raw(axp, &charge_current);
> +       charge_current = (charge_current - axp->data->ccc_offset) /
> +               axp->data->ccc_scale;
>
>         if (charge_current > AXP20X_CHRG_CTRL1_TGT_CURR || charge_current < 0)
>                 return -EINVAL;
>
> -       raw_to_constant_charge_current(axp, &charge_current);
> +       charge_current = charge_current * axp->data->ccc_scale +
> +               axp->data->ccc_offset;
>
>         if (charge_current > axp->max_ccc)
>                 dev_warn(axp->dev,
> @@ -460,13 +476,28 @@ static const struct power_supply_desc axp20x_batt_ps_desc = {
>         .set_property = axp20x_battery_set_prop,
>  };
>
> +struct axp_data axp209_data = {

const.

> +       .ccc_scale = 100000,
> +       .ccc_offset = 300000,
> +       .get_max_voltage = axp20x_battery_get_max_voltage,
> +       .set_max_voltage = axp20x_battery_set_max_voltage,
> +};
> +
> +struct axp_data axp221_data = {

const.

> +       .ccc_scale = 150000,
> +       .ccc_offset = 300000,
> +       .has_fg_valid = true,
> +       .get_max_voltage = axp22x_battery_get_max_voltage,
> +       .set_max_voltage = axp22x_battery_set_max_voltage,
> +};
> +
>  static const struct of_device_id axp20x_battery_ps_id[] = {
>         {
>                 .compatible = "x-powers,axp209-battery-power-supply",
> -               .data = (void *)AXP209_ID,
> +               .data = (void *)&axp209_data,
>         }, {
>                 .compatible = "x-powers,axp221-battery-power-supply",
> -               .data = (void *)AXP221_ID,
> +               .data = (void *)&axp221_data,
>         }, { /* sentinel */ },
>  };
>  MODULE_DEVICE_TABLE(of, axp20x_battery_ps_id);
> @@ -476,6 +507,7 @@ static int axp20x_power_probe(struct platform_device *pdev)
>         struct axp20x_batt_ps *axp20x_batt;
>         struct power_supply_config psy_cfg = {};
>         struct power_supply_battery_info info;
> +       struct device *dev = &pdev->dev;
>
>         if (!of_device_is_available(pdev->dev.of_node))
>                 return -ENODEV;
> @@ -516,7 +548,7 @@ static int axp20x_power_probe(struct platform_device *pdev)
>         psy_cfg.drv_data = axp20x_batt;
>         psy_cfg.of_node = pdev->dev.of_node;
>
> -       axp20x_batt->axp_id = (uintptr_t)of_device_get_match_data(&pdev->dev);
> +       axp20x_batt->data = (struct axp_data *)of_device_get_match_data(dev);

const in the cast.

Otherwise,

Reviewed-by: Chen-Yu Tsai <wens-jdAy2FN1RRM@public.gmane.org>

>
>         axp20x_batt->batt = devm_power_supply_register(&pdev->dev,
>                                                        &axp20x_batt_ps_desc,
> --
> git-series 0.9.1