Re: [PATCH v1 2/2] hwmon: ina2xx: add optional regulator support

From: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
To: Svyatoslav Ryhel <clamor95@gmail.com>,
	Guenter Roeck <linux@roeck-us.net>,
	Jean Delvare <jdelvare@suse.com>,
	Rob Herring <robh+dt@kernel.org>,
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Mark Brown <broonie@kernel.org>
Cc: linux-hwmon@vger.kernel.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 2/2] hwmon: ina2xx: add optional regulator support
Date: Wed, 8 Mar 2023 11:25:34 +0100	[thread overview]
Message-ID: <378db0d7-4d5a-a445-3e1a-ee6d8da5a9e2@linaro.org> (raw)
In-Reply-To: <20230308094024.14115-3-clamor95@gmail.com>

On 08/03/2023 10:40, Svyatoslav Ryhel wrote:
> Some devices may need a specific supply provided
> for this sensor to work properly, like p895 does.
> 
> Signed-off-by: Svyatoslav Ryhel <clamor95@gmail.com>
> ---
>  drivers/hwmon/ina2xx.c | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/hwmon/ina2xx.c b/drivers/hwmon/ina2xx.c
> index 00fc70305a89..4a3e2b1bbe8b 100644
> --- a/drivers/hwmon/ina2xx.c
> +++ b/drivers/hwmon/ina2xx.c
> @@ -119,6 +119,7 @@ struct ina2xx_data {
>  	long power_lsb_uW;
>  	struct mutex config_lock;
>  	struct regmap *regmap;
> +	struct regulator *vdd_supply;
>  
>  	const struct attribute_group *groups[INA2XX_MAX_ATTRIBUTE_GROUPS];
>  };
> @@ -656,6 +657,17 @@ static int ina2xx_probe(struct i2c_client *client)
>  		return PTR_ERR(data->regmap);
>  	}
>  
> +	data->vdd_supply = devm_regulator_get_optional(dev, "vdd");
> +	if (IS_ERR(data->vdd_supply))
> +		return dev_err_probe(dev, PTR_ERR(data->vdd_supply),
> +				     "failed to get vdd regulator\n");
> +
> +	ret = regulator_enable(data->vdd_supply);
> +	if (ret < 0) {
> +		dev_err(dev, "failed to enable vdd power supply\n");
> +		return ret;

And where is disable? On each error path, removal etc.

Best regards,
Krzysztof