linux-kernel - Re: [PATCH v1 2/4] power: max17040: add simple battery cell support

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Message-ID: <20230515222107.kwcb6astisbmdcwe@mercury.elektranox.org>
Date:   Tue, 16 May 2023 00:21:07 +0200
From:   Sebastian Reichel <sebastian.reichel@...labora.com>
To:     Svyatoslav Ryhel <clamor95@...il.com>
Cc:     Iskren Chernev <me@...ren.info>,
        Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Matheus Castello <matheus@...tello.eng.br>,
        Rob Herring <robh+dt@...nel.org>, linux-pm@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1 2/4] power: max17040: add simple battery cell support

Hi,

On Wed, Mar 08, 2023 at 10:44:17AM +0200, Svyatoslav Ryhel wrote:
> Simple battery cell allows to pass some constant data
> about battery controlled by this fuel gauge.
> 
> Signed-off-by: Svyatoslav Ryhel <clamor95@...il.com>
> ---

This patch is no longer needed, since the core should automatically
expose the properties with the latest kernel:

https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=27a2195efa8d26447c40dd4a6299ea0247786d75

-- Sebastian

>  drivers/power/supply/max17040_battery.c | 34 +++++++++++++++++++++++++
>  1 file changed, 34 insertions(+)
> 
> diff --git a/drivers/power/supply/max17040_battery.c b/drivers/power/supply/max17040_battery.c
> index d1075959dd46..2778ed5b5c14 100644
> --- a/drivers/power/supply/max17040_battery.c
> +++ b/drivers/power/supply/max17040_battery.c
> @@ -141,6 +141,7 @@ struct max17040_chip {
>  	struct regmap			*regmap;
>  	struct delayed_work		work;
>  	struct power_supply		*battery;
> +	struct power_supply_battery_info	*batt_info;
>  	struct chip_data		data;
>  
>  	/* battery capacity */
> @@ -400,6 +401,28 @@ static int max17040_get_property(struct power_supply *psy,
>  	case POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN:
>  		val->intval = chip->low_soc_alert;
>  		break;
> +
> +	case POWER_SUPPLY_PROP_TECHNOLOGY:
> +		val->intval = chip->batt_info->technology;
> +		break;
> +	case POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN:
> +		val->intval = chip->batt_info->energy_full_design_uwh;
> +		break;
> +	case POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN:
> +		val->intval = chip->batt_info->charge_full_design_uah;
> +		break;
> +	case POWER_SUPPLY_PROP_TEMP_MIN:
> +		if (chip->batt_info->temp_min == INT_MIN)
> +			return -ENODATA;
> +
> +		val->intval = chip->batt_info->temp_min * 10;
> +		break;
> +	case POWER_SUPPLY_PROP_TEMP_MAX:
> +		if (chip->batt_info->temp_max == INT_MAX)
> +			return -ENODATA;
> +
> +		val->intval = chip->batt_info->temp_max * 10;
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> @@ -418,6 +441,11 @@ static enum power_supply_property max17040_battery_props[] = {
>  	POWER_SUPPLY_PROP_VOLTAGE_NOW,
>  	POWER_SUPPLY_PROP_CAPACITY,
>  	POWER_SUPPLY_PROP_CAPACITY_ALERT_MIN,
> +	POWER_SUPPLY_PROP_TECHNOLOGY,
> +	POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
> +	POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
> +	POWER_SUPPLY_PROP_TEMP_MIN,
> +	POWER_SUPPLY_PROP_TEMP_MAX,
>  };
>  
>  static const struct power_supply_desc max17040_battery_desc = {
> @@ -470,6 +498,12 @@ static int max17040_probe(struct i2c_client *client)
>  		return PTR_ERR(chip->battery);
>  	}
>  
> +	if (client->dev.of_node) {
> +		if (power_supply_get_battery_info(chip->battery, &chip->batt_info))
> +			dev_warn(&client->dev,
> +				 "No monitored battery, some properties will be missing\n");
> +	}
> +
>  	ret = max17040_get_version(chip);
>  	if (ret < 0)
>  		return ret;
> -- 
> 2.37.2
> 

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