linux-kernel - Re: [PATCH V1 1/2] regulator: aw37503: add regulator driver for AWINIC AW37503

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Message-ID: <284e464a-85dc-f07b-27f8-fda516ca7b24@linaro.org>
Date:   Wed, 26 Jul 2023 13:16:35 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     like@...nic.com, lgirdwood@...il.com, broonie@...nel.org,
        robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        conor+dt@...nel.org
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        liweilei@...nic.com, liangdong@...nic.com, wangweidong.a@...nic.com
Subject: Re: [PATCH V1 1/2] regulator: aw37503: add regulator driver for
 AWINIC AW37503

On 26/07/2023 10:16, like@...nic.com wrote:
> From: Alec Li <like@...nic.com>
> 
> Add regulator driver for the device AWINIC AW37503 which is single
> inductor - dual output power supply device. AW37503 device is
> designed to support general positive/negative driven applications
> like TFT display panels.
> 

Thank you for your patch. There is something to discuss/improve.


> +
> +static int aw37503_probe(struct i2c_client *client)
> +{
> +	struct device *dev = &client->dev;
> +	struct aw37503_regulator *chip;
> +	struct regulator_dev *rdev;
> +	struct regmap *regmap;
> +	struct regulator_config config = { };
> +	int id;
> +	int ret;
> +
> +	chip = devm_kzalloc(dev, sizeof(*chip), GFP_KERNEL);
> +	if (!chip)
> +		return -ENOMEM;
> +
> +	regmap = devm_regmap_init_i2c(client, &aw37503_regmap_config);
> +	if (IS_ERR(regmap)) {
> +		ret = PTR_ERR(regmap);
> +		dev_err(dev, "regmap init failed: %d\n", ret);
> +		return ret;

return dev_err_probe

> +	}
> +
> +	i2c_set_clientdata(client, chip);
> +	chip->dev = dev;
> +
> +	for (id = 0; id < AW37503_MAX_REGULATORS; ++id) {
> +		config.regmap = regmap;
> +		config.dev = dev;
> +		config.driver_data = chip;
> +
> +		rdev = devm_regulator_register(dev, &aw_regs_desc[id],
> +					       &config);
> +		if (IS_ERR(rdev)) {
> +			ret = PTR_ERR(rdev);
> +			dev_err(dev, "regulator %s register failed: %d\n",
> +				aw_regs_desc[id].name, ret);
> +			return ret;

return dev_err_probe will be easier

> +		}
> +	}
> +	return 0;
> +}
> +
> +static const struct i2c_device_id aw37503_id[] = {
> +	{.name = "aw37503",},
> +	{},
> +};
> +MODULE_DEVICE_TABLE(i2c, aw37503_id);
> +
> +static const struct of_device_id aw37503_dt_ids[] = {
> +	{.compatible = "awinic,aw37503",},
> +	{ /* Sentinel */ },
> +};
> +
> +MODULE_DEVICE_TABLE(of, aw37503_dt_ids);
> +
> +static struct i2c_driver aw37503_i2c_driver = {
> +	.driver = {
> +		.name = "aw37503",
> +		.of_match_table = of_match_ptr(aw37503_dt_ids),

Drop of_match_ptr()


Best regards,
Krzysztof