linux-kernel - Re: [PATCH 10/10] power: supply: olpc_battery: Have the framework register sysfs files for us

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Message-ID: <20190405134930.acntvwnep3ne6uol@earth.universe>
Date:   Fri, 5 Apr 2019 15:49:30 +0200
From:   Sebastian Reichel <sre@...nel.org>
To:     Lubomir Rintel <lkundrak@...sk>
Cc:     Darren Hart <dvhart@...radead.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>, x86@...nel.org,
        linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 10/10] power: supply: olpc_battery: Have the framework
 register sysfs files for us

Hi,

On Sun, Mar 10, 2019 at 05:24:19PM +0100, Lubomir Rintel wrote:
> The power framework gained ability to register groups of sysfs
> attributes in commit cef8fe6a382c ("power: supply: core: add support for
> custom sysfs attributes").
> 
> Signed-off-by: Lubomir Rintel <lkundrak@...sk>
> Suggested-by: Sebastian Reichel <sre@...nel.org>
> 
> ---

Reviewed-by: Sebastian Reichel <sebastian.reichel@...labora.com>

-- Sebastian

> Changes since v5:
> - Added this patch
> 
>  drivers/power/supply/olpc_battery.c | 64 ++++++++++++++++-------------
>  1 file changed, 35 insertions(+), 29 deletions(-)
> 
> diff --git a/drivers/power/supply/olpc_battery.c b/drivers/power/supply/olpc_battery.c
> index 0d67158c13d6..c628d3a47e14 100644
> --- a/drivers/power/supply/olpc_battery.c
> +++ b/drivers/power/supply/olpc_battery.c
> @@ -551,7 +551,7 @@ static ssize_t olpc_bat_eeprom_read(struct file *filp, struct kobject *kobj,
>  	return count;
>  }
>  
> -static const struct bin_attribute olpc_bat_eeprom = {
> +static struct bin_attribute olpc_bat_eeprom = {
>  	.attr = {
>  		.name = "eeprom",
>  		.mode = S_IRUGO,
> @@ -575,7 +575,7 @@ static ssize_t olpc_bat_error_read(struct device *dev,
>  	return sprintf(buf, "%d\n", ec_byte);
>  }
>  
> -static const struct device_attribute olpc_bat_error = {
> +static struct device_attribute olpc_bat_error = {
>  	.attr = {
>  		.name = "error",
>  		.mode = S_IRUGO,
> @@ -583,6 +583,27 @@ static const struct device_attribute olpc_bat_error = {
>  	.show = olpc_bat_error_read,
>  };
>  
> +static struct attribute *olpc_bat_sysfs_attrs[] = {
> +	&olpc_bat_error.attr,
> +	NULL
> +};
> +
> +static struct bin_attribute *olpc_bat_sysfs_bin_attrs[] = {
> +	&olpc_bat_eeprom,
> +	NULL
> +};
> +
> +static const struct attribute_group olpc_bat_sysfs_group = {
> +	.attrs = olpc_bat_sysfs_attrs,
> +	.bin_attrs = olpc_bat_sysfs_bin_attrs,
> +
> +};
> +
> +static const struct attribute_group *olpc_bat_sysfs_groups[] = {
> +	&olpc_bat_sysfs_group,
> +	NULL
> +};
> +
>  /*********************************************************************
>   *		Initialisation
>   *********************************************************************/
> @@ -615,7 +636,8 @@ static int olpc_battery_suspend(struct platform_device *pdev,
>  
>  static int olpc_battery_probe(struct platform_device *pdev)
>  {
> -	struct power_supply_config psy_cfg = {};
> +	struct power_supply_config bat_psy_cfg = {};
> +	struct power_supply_config ac_psy_cfg = {};
>  	struct olpc_battery_data *data;
>  	uint8_t status;
>  	uint8_t ecver;
> @@ -654,10 +676,11 @@ static int olpc_battery_probe(struct platform_device *pdev)
>  
>  	/* Ignore the status. It doesn't actually matter */
>  
> -	psy_cfg.of_node = pdev->dev.of_node;
> -	psy_cfg.drv_data = data;
> +	ac_psy_cfg.of_node = pdev->dev.of_node;
> +	ac_psy_cfg.drv_data = data;
>  
> -	data->olpc_ac = devm_power_supply_register(&pdev->dev, &olpc_ac_desc, &psy_cfg);
> +	data->olpc_ac = devm_power_supply_register(&pdev->dev, &olpc_ac_desc,
> +								&ac_psy_cfg);
>  	if (IS_ERR(data->olpc_ac))
>  		return PTR_ERR(data->olpc_ac);
>  
> @@ -671,37 +694,21 @@ static int olpc_battery_probe(struct platform_device *pdev)
>  		olpc_bat_desc.num_properties = ARRAY_SIZE(olpc_xo1_bat_props);
>  	}
>  
> -	data->olpc_bat = devm_power_supply_register(&pdev->dev, &olpc_bat_desc, &psy_cfg);
> +	bat_psy_cfg.of_node = pdev->dev.of_node;
> +	bat_psy_cfg.drv_data = data;
> +	bat_psy_cfg.attr_grp = olpc_bat_sysfs_groups;
> +
> +	data->olpc_bat = devm_power_supply_register(&pdev->dev, &olpc_bat_desc,
> +								&bat_psy_cfg);
>  	if (IS_ERR(data->olpc_bat))
>  		return PTR_ERR(data->olpc_bat);
>  
> -	ret = device_create_bin_file(&data->olpc_bat->dev, &olpc_bat_eeprom);
> -	if (ret)
> -		return ret;
> -
> -	ret = device_create_file(&data->olpc_bat->dev, &olpc_bat_error);
> -	if (ret)
> -		goto error_failed;
> -
>  	if (olpc_ec_wakeup_available()) {
>  		device_set_wakeup_capable(&data->olpc_ac->dev, true);
>  		device_set_wakeup_capable(&data->olpc_bat->dev, true);
>  	}
>  
>  	return 0;
> -
> -error_failed:
> -	device_remove_bin_file(&data->olpc_bat->dev, &olpc_bat_eeprom);
> -	return ret;
> -}
> -
> -static int olpc_battery_remove(struct platform_device *pdev)
> -{
> -	struct olpc_battery_data *data = platform_get_drvdata(pdev);
> -
> -	device_remove_file(&data->olpc_bat->dev, &olpc_bat_error);
> -	device_remove_bin_file(&data->olpc_bat->dev, &olpc_bat_eeprom);
> -	return 0;
>  }
>  
>  static const struct of_device_id olpc_battery_ids[] = {
> @@ -717,7 +724,6 @@ static struct platform_driver olpc_battery_driver = {
>  		.of_match_table = olpc_battery_ids,
>  	},
>  	.probe = olpc_battery_probe,
> -	.remove = olpc_battery_remove,
>  	.suspend = olpc_battery_suspend,
>  };
>  
> -- 
> 2.20.1
> 

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