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

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Date:   Wed, 26 Jul 2023 22:13:55 +0200
From:   Christophe JAILLET <christophe.jaillet@...adoo.fr>
To:     like@...nic.com
Cc:     broonie@...nel.org, conor+dt@...nel.org,
        devicetree@...r.kernel.org, krzysztof.kozlowski+dt@...aro.org,
        lgirdwood@...il.com, liangdong@...nic.com,
        linux-kernel@...r.kernel.org, liweilei@...nic.com,
        robh+dt@...nel.org, wangweidong.a@...nic.com
Subject: Re: [PATCH V1 1/2] regulator: aw37503: add regulator driver for
 AWINIC AW37503

Le 26/07/2023 à 10:16, like-tUEr1MkLeujQT0dZR+AlfA@...lic.gmane.org a 
écrit :
> From: Alec Li <like-tUEr1MkLeujQT0dZR+AlfA@...lic.gmane.org>
> 
> 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.
> 
> AW37503 regulator driver supports to enable/disable and set voltage
> on its output.
> 
> Signed-off-by: Alec Li <like-tUEr1MkLeujQT0dZR+AlfA@...lic.gmane.org>

[...]

> +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;
> +	}
> +
> +	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;

I think that these 3 lines could be outside of the loop.

> +
> +		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 0;
> +}

[...]