linux-kernel - Re: [PATCH] regulator: ab8500: Provide map

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Message-ID: <CACRpkdY4MEJyY4w42yEStYUg+yMeP3uekVVi31nSd-90fOo1HA@mail.gmail.com>
Date:	Sun, 21 Jul 2013 16:45:23 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Mark Brown <broonie@...nel.org>
Cc:	Liam Girdwood <lgirdwood@...il.com>,
	Lee Jones <lee.jones@...aro.org>,
	Bengt Jonsson <bengt.g.jonsson@...ricsson.com>,
	linaro-kernel <linaro-kernel@...ts.linaro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Mark Brown <broonie@...aro.org>
Subject: Re: [PATCH] regulator: ab8500: Provide map_voltage() functions

On Wed, Jul 3, 2013 at 11:16 AM, Mark Brown <broonie@...nel.org> wrote:

> From: Mark Brown <broonie@...aro.org>
>
> Since all the voltage tables for ab8500 are sorted in ascending order we
> can improve performance by using regulator_map_voltage_ascend(). A couple
> of the regulators can actually use linear maps which would be even better.
>
> Signed-off-by: Mark Brown <broonie@...aro.org>

Hm. Have you looked closer at this one voltage table in this driver:

static const unsigned int ldo_vaux56_voltages[] = {
    1800000,
    1050000,
    1100000,
    1200000,
    1500000,
    2200000,
    2500000,
    2790000,
};

Or this one:

static const unsigned int ldo_sdio_voltages[] = {
    1160000,
    1050000,
    1100000,
    1500000,
    1800000,
    2200000,
    2910000,
    3050000,
};

Yours,
Linus Walleij
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