linux-kernel - Re: [PATCH] drivers: power: axp20x-battery: support setting charge_full

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Date:   Fri, 28 Aug 2020 19:47:40 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Jack Mitchell <ml@...ed.me.uk>
Cc:     linux-pm@...r.kernel.org, Chen-Yu Tsai <wens@...e.org>,
        linux-kernel@...r.kernel.org,
        Quentin Schulz <quentin.schulz@...e-electrons.com>
Subject: Re: [PATCH] drivers: power: axp20x-battery: support setting
 charge_full_design

Hi,

On Wed, Jul 29, 2020 at 11:49:13AM +0100, Jack Mitchell wrote:
> Signed-off-by: Jack Mitchell <ml@...ed.me.uk>
> ---

^ missing long description

Also the patch does not apply and needs to be rebased.

-- Sebastian

>  drivers/power/supply/axp20x_battery.c | 39 +++++++++++++++++++++++++++
>  1 file changed, 39 insertions(+)
> 
> diff --git a/drivers/power/supply/axp20x_battery.c b/drivers/power/supply/axp20x_battery.c
> index fe96f77bffa7..8ce4ebe7ccd5 100644
> --- a/drivers/power/supply/axp20x_battery.c
> +++ b/drivers/power/supply/axp20x_battery.c
> @@ -60,6 +60,7 @@
>  
>  #define AXP20X_V_OFF_MASK		GENMASK(2, 0)
>  
> +#define AXP20X_BAT_MAX_CAP_VALID	BIT(7)
>  
>  struct axp20x_batt_ps;
>  
> @@ -86,6 +87,7 @@ struct axp20x_batt_ps {
>  	struct axp20x_thermal_sensor sensor;
>  	/* Maximum constant charge current */
>  	unsigned int max_ccc;
> +	unsigned int charge_full_design;
>  	const struct axp_data	*data;
>  };
>  
> @@ -260,6 +262,10 @@ static int axp20x_battery_get_prop(struct power_supply *psy,
>  		val->intval = POWER_SUPPLY_HEALTH_GOOD;
>  		break;
>  
> +	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
> +		val->intval = axp20x_batt->charge_full_design;
> +		break;
> +

So it reports 0 instead of the hardware information before
setting it once when no setup happens through DT?

-- Sebastian

>  	case POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT:
>  		ret = axp20x_get_constant_charge_current(axp20x_batt,
>  							 &val->intval);
> @@ -401,6 +407,30 @@ static int axp20x_battery_set_max_voltage(struct axp20x_batt_ps *axp20x_batt,
>  				  AXP20X_CHRG_CTRL1_TGT_VOLT, val);
>  }
>  
> +static int axp20x_set_charge_full_design(struct axp20x_batt_ps *axp_batt,
> +					      int charge_full_uah)
> +{
> +	/* (Unit: 1.456mAh) */
> +	int max_capacity_units = charge_full_uah / 1456;
> +	int ret;
> +
> +	u8 max_capacity_msb = (max_capacity_units & 0x7F00) >> 8;
> +	u8 max_capacity_lsb = (max_capacity_units & 0xFF);
> +
> +	axp_batt->charge_full_design = max_capacity_units * 1456;
> +
> +	max_capacity_msb |= AXP20X_BAT_MAX_CAP_VALID;
> +
> +	ret = regmap_write(axp_batt->regmap, AXP288_FG_DES_CAP0_REG,
> +			   max_capacity_lsb);
> +
> +	if (ret)
> +		return ret;
> +
> +	return regmap_write(axp_batt->regmap, AXP288_FG_DES_CAP1_REG,
> +			    max_capacity_msb);
> +}
> +
>  static int axp20x_set_constant_charge_current(struct axp20x_batt_ps *axp_batt,
>  					      int charge_current)
>  {
> @@ -492,6 +522,7 @@ static enum power_supply_property axp20x_battery_props[] = {
>  	POWER_SUPPLY_PROP_STATUS,
>  	POWER_SUPPLY_PROP_VOLTAGE_NOW,
>  	POWER_SUPPLY_PROP_CURRENT_NOW,
> +	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
>  	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT,
>  	POWER_SUPPLY_PROP_CONSTANT_CHARGE_CURRENT_MAX,
>  	POWER_SUPPLY_PROP_HEALTH,
> @@ -675,6 +706,7 @@ static int axp20x_power_probe(struct platform_device *pdev)
>  	if (!power_supply_get_battery_info(axp20x_batt->batt, &info)) {
>  		int vmin = info.voltage_min_design_uv;
>  		int ccc = info.constant_charge_current_max_ua;
> +		int cfd = info.charge_full_design_uah;
>  
>  		if (vmin > 0 && axp20x_set_voltage_min_design(axp20x_batt,
>  							      vmin))
> @@ -692,6 +724,13 @@ static int axp20x_power_probe(struct platform_device *pdev)
>  			axp20x_batt->max_ccc = ccc;
>  			axp20x_set_constant_charge_current(axp20x_batt, ccc);
>  		}
> +
> +		if (cfd > 0 && axp20x_set_charge_full_design(axp20x_batt,
> +							       cfd)) {
> +			dev_err(&pdev->dev,
> +				"couldn't set charge_full_design\n");
> +			axp20x_batt->charge_full_design = 0;
> +		}
>  	}
>  
>  	error = axp20x_thermal_register_sensor(pdev, axp20x_batt);
> -- 
> 2.28.0
> 

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