linux-kernel - Re: [PATCH V1 3/3] regulator: slg51000: add slg51000 regulator driver

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Message-ID: <20190416152448.GC4834@sirena.org.uk>
Date:   Tue, 16 Apr 2019 16:24:48 +0100
From:   Mark Brown <broonie@...nel.org>
To:     Eric Jeong <eric.jeong.opensource@...semi.com>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        DEVICETREE <devicetree@...r.kernel.org>,
        LINUX-KERNEL <linux-kernel@...r.kernel.org>,
        Mark Rutland <mark.rutland@....com>,
        Support Opensource <support.opensource@...semi.com>
Subject: Re: [PATCH V1 3/3] regulator: slg51000: add slg51000 regulator driver

On Tue, Apr 16, 2019 at 01:37:27PM +0900, Eric Jeong wrote:

> +static int slg51000_regulator_is_enabled(struct regulator_dev *rdev)
> +{
> +	struct slg51000 *chip = rdev_get_drvdata(rdev);
> +	int ret, id = rdev_get_id(rdev);
> +	unsigned int state;
> +
> +	ret = regmap_read(chip->regmap, es_reg[id].sreg, &state);
> +	if (ret < 0) {
> +		dev_err(chip->dev, "Failed to read status register(%d)\n",
> +			ret);
> +		return ret;
> +	}
> +
> +	if (!(state & SLG51000_STA_ILIM_FLAG_MASK) &&
> +	    (state & SLG51000_STA_VOUT_OK_FLAG_MASK))
> +		return 1;
> +	else
> +		return 0;

This looks like it should be a get_status() operation as it's reading
status bits rather than the command we sent to the device - for that
just use regulator_is_enabled_regmap().  

Otherwise this all looks great.

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