linux-kernel - Re: [PATCH v5 1/5] hwmon: (pmbus/core): Add rdev in pmbus

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Date:   Thu, 1 Dec 2022 12:04:19 -0800
From:   Guenter Roeck <linux@...ck-us.net>
To:     Naresh Solanki <naresh.solanki@...ements.com>
Cc:     devicetree@...r.kernel.org, Jean Delvare <jdelvare@...e.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>, linux-kernel@...r.kernel.org,
        linux-hwmon@...r.kernel.org,
        Patrick Rudolph <patrick.rudolph@...ements.com>
Subject: Re: [PATCH v5 1/5] hwmon: (pmbus/core): Add rdev in pmbus_data struct

On Thu, Dec 01, 2022 at 08:30:20PM +0100, Naresh Solanki wrote:
> Add regulator device in pmbus_data & initialize the same during PMBus
> regulator register.
> 

This needs an explanation why this change is needed.

Guenter

> Signed-off-by: Naresh Solanki <Naresh.Solanki@...ements.com>
> 
> ---
> Change in V5:
> - Fix error check for rdev
> ---
>  drivers/hwmon/pmbus/pmbus_core.c | 13 +++++++++----
>  1 file changed, 9 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c
> index 95e95783972a..a95f998ca247 100644
> --- a/drivers/hwmon/pmbus/pmbus_core.c
> +++ b/drivers/hwmon/pmbus/pmbus_core.c
> @@ -81,6 +81,7 @@ struct pmbus_label {
>  struct pmbus_data {
>  	struct device *dev;
>  	struct device *hwmon_dev;
> +	struct regulator_dev **rdevs;
>  
>  	u32 flags;		/* from platform data */
>  
> @@ -3050,9 +3051,13 @@ static int pmbus_regulator_register(struct pmbus_data *data)
>  	struct device *dev = data->dev;
>  	const struct pmbus_driver_info *info = data->info;
>  	const struct pmbus_platform_data *pdata = dev_get_platdata(dev);
> -	struct regulator_dev *rdev;
>  	int i;
>  
> +	data->rdevs = devm_kzalloc(dev, sizeof(struct regulator_dev *) * info->num_regulators,
> +				  GFP_KERNEL);
> +	if (!data->rdevs)
> +		return -ENOMEM;
> +
>  	for (i = 0; i < info->num_regulators; i++) {
>  		struct regulator_config config = { };
>  
> @@ -3062,10 +3067,10 @@ static int pmbus_regulator_register(struct pmbus_data *data)
>  		if (pdata && pdata->reg_init_data)
>  			config.init_data = &pdata->reg_init_data[i];
>  
> -		rdev = devm_regulator_register(dev, &info->reg_desc[i],
> +		data->rdevs[i] = devm_regulator_register(dev, &info->reg_desc[i],
>  					       &config);
> -		if (IS_ERR(rdev))
> -			return dev_err_probe(dev, PTR_ERR(rdev),
> +		if (IS_ERR(data->rdevs[i]))
> +			return dev_err_probe(dev, PTR_ERR(data->rdevs[i]),
>  					     "Failed to register %s regulator\n",
>  					     info->reg_desc[i].name);
>  	}
> 
> base-commit: 9494c53e1389b120ba461899207ac8a3aab2632c
> -- 
> 2.37.3
>