linux-kernel - Re: [RFC 2/3] mmc: sdhci: add host_ops->voltage

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Date:	Fri, 2 Oct 2015 03:00:10 -0700
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Vaibhav Hiremath <vaibhav.hiremath@...aro.org>
Cc:	Jisheng Zhang <jszhang@...vell.com>,
	"linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
	Ulf Hansson <ulf.hansson@...aro.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>
Subject: Re: [RFC 2/3] mmc: sdhci: add host_ops->voltage_switch callback for
 all other voltages

On Wed, Sep 2, 2015 at 1:19 AM, Vaibhav Hiremath
<vaibhav.hiremath@...aro.org> wrote:

> Not quite sure whether regulator would be right fit for this.
>
> Initially I was thinking of making use of pinconf framework, using
> PIN_CONFIG_POWER_SOURCE, but that too I am not sure is the right way of
> doing it.
>
> Probably, question for pinctrl maintainer. Looping Linus Walleji.

We have another pinctrl driver exposing the occasional fixed regulator
for exactly this purpose, see:
sh-pfc/pfc-sh73a0.c

So use the same mechanism for this driver.

Yours,
Linus Walleij
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