linux-kernel - Re: [PATCH 6/6] regulator: max77620: add regulator driver for max77620/max20024

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Message-ID: <20160110124014.GZ6588@sirena.org.uk>
Date:	Sun, 10 Jan 2016 12:40:14 +0000
From:	Mark Brown <broonie@...nel.org>
To:	Laxman Dewangan <ldewangan@...dia.com>
Cc:	robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
	ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
	linus.walleij@...aro.org, gnurou@...il.com, lee.jones@...aro.org,
	a.zummo@...ertech.it, alexandre.belloni@...e-electrons.com,
	lgirdwood@...il.com, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-gpio@...r.kernel.org,
	rtc-linux@...glegroups.com, swarren@...dia.com, treding@...dia.com,
	Mallikarjun Kasoju <mkasoju@...dia.com>
Subject: Re: [PATCH 6/6] regulator: max77620: add regulator driver for
 max77620/max20024

On Thu, Jan 07, 2016 at 08:08:44PM +0530, Laxman Dewangan wrote:

This looks mostly good, a few fairly small things:

> +	if (rinfo->type == MAX77620_REGULATOR_TYPE_SD)
> +		addr = rinfo->cfg_addr;

Please write things like this as switch statement so if we end up adding
more variants the code looks more natural.

> +	case REGULATOR_MODE_IDLE:
> +	case REGULATOR_MODE_STANDBY:
> +		if (rpdata->glpm_enable)
> +			power_mode = MAX77620_POWER_MODE_GLPM;
> +		else
> +			power_mode = MAX77620_POWER_MODE_LPM;
> +		break;

If there's no difference between two modes just don't implement one of
the modes and let the framework worry about what to do for the other
one.

> +static int max77620_get_regulator_dt_data(struct platform_device *pdev,
> +		struct max77620_regulator *max77620_regs)
> +{
> +	struct device_node *np;
> +	u32 prop;
> +	int id;
> +	int ret;
> +
> +	np = of_get_child_by_name(pdev->dev.parent->of_node, "regulators");
> +	if (!np) {
> +		dev_err(&pdev->dev, "Device is not having regulators node\n");
> +		return -ENODEV;
> +	}
> +	pdev->dev.of_node = np;
> +
> +	ret = of_regulator_match(&pdev->dev, np, max77620_regulator_matches,
> +			ARRAY_SIZE(max77620_regulator_matches));
> +	if (ret < 0) {
> +		dev_err(&pdev->dev, "Parsing of regulator node failed: %d\n",
> +			ret);
> +		return ret;
> +	}

Don't open code this, use the core support via regulators and of_match.

> +		if (reg_pdata->disable_remote_sense_on_suspend &&
> +				(rinfo->remote_sense_addr != 0xFF)) {

Weird indentation here, the second line doesn't seem to be aligned with
anything.

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