linux-kernel - Re: [RFC 2/3] regulator: rk808: Add support for rk818

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Date:	Sun, 10 Apr 2016 20:04:41 +0100
From:	Mark Brown <broonie@...nel.org>
To:	Wadim Egorov <w.egorov@...tec.de>
Cc:	linux-kernel@...r.kernel.org, linux-rockchip@...ts.infradead.org,
	devicetree@...r.kernel.org, robh+dt@...nel.org, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, lee.jones@...aro.org, lgirdwood@...il.com,
	dianders@...omium.org, zyw@...k-chips.com
Subject: Re: [RFC 2/3] regulator: rk808: Add support for rk818

On Fri, Apr 08, 2016 at 11:47:40AM +0200, Wadim Egorov wrote:

> +static const struct regulator_linear_range rk818_buck4_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(1800000, 0, 18, 100000),
> +};
> +
> +static const struct regulator_linear_range rk818_boost_voltage_ranges[] = {
> +	REGULATOR_LINEAR_RANGE(4700000, 0, 7, 100000),
> +};

Why are these done as linear ranges when there's only one range?  This
just adds overhead, just specify the one range directly in the desc and
use the appropriate ops.

> +	if (rk808->variant == RK808_ID)
> +		ret = of_regulator_match(dev, np, rk808_reg_matches,
> +					 RK808_NUM_REGULATORS);
> +	else if (rk808->variant == RK818_ID)
> +		ret = of_regulator_match(dev, np, rk818_reg_matches,
> +					RK818_NUM_REGULATORS);

Don't use of_regulator_match, just specify the DT names for the
regulator in the desc.  Also it looks like you're trying to write a
switch statement with ifs here, just write a switch statement.  It's
clearer and less error prone.

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