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

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Message-ID: <20230728032026.1479380-1-like@awinic.com>
Date:   Fri, 28 Jul 2023 03:20:26 +0000
From:   like@...nic.com
To:     christophe.jaillet@...adoo.fr
Cc:     broonie@...nel.org, conor+dt@...nel.org,
        devicetree@...r.kernel.org, krzysztof.kozlowski+dt@...aro.org,
        lgirdwood@...il.com, liangdong@...nic.com, like@...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

Hello Christophe JAILLET,
Thank you very much for your advice.

> > 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.

I will modify it as suggested.

> > +
> > +		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;
> > +}


Best regards,
Alec Li