linux-kernel - Re: [PATCH 4/5] regulator: pwm: Add support for voltage linear equal steps

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Message-ID: <20160312060925.GW3898@sirena.org.uk>
Date:	Sat, 12 Mar 2016 13:09:25 +0700
From:	Mark Brown <broonie@...nel.org>
To:	Laxman Dewangan <ldewangan@...dia.com>
Cc:	robh+dt@...nel.org, pawel.moll@....com, lgirdwood@...il.com,
	lee.jones@...aro.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH 4/5] regulator: pwm: Add support for voltage linear equal
 steps

On Tue, Mar 08, 2016 at 04:23:24PM +0530, Laxman Dewangan wrote:

> There is a use cases where entire voltage ranges from minimum
> to maximum is divided into n equal steps and just providing the
> steps count, the voltage table with duty cycles is linearly
> calculated.

I can't see any reason why this would ever be preferable to just using
the flat linear range (you certainly haven't articulated one, you're
just stating it).  This seems like you are bodging around a limited
consumer driver, you should fix the consumer to cope with regulators
with lots of voltages - PWM regulators aren't the only ones with high
resolution steps.

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