linux-kernel - Re: [PATCH V9 04/23] mmc: core: Extend support for mmc regulators with a vqmmc2

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Message-ID: <CAK00qKB4OLLO0RXDE9XqNCZ-59VRC2knMD=-pBCNzav=pR_nZQ@mail.gmail.com>
Date:   Fri, 18 Aug 2023 17:58:17 +0800
From:   Victor Shih <victorshihgli@...il.com>
To:     Ulf Hansson <ulf.hansson@...aro.org>
Cc:     adrian.hunter@...el.com, linux-mmc@...r.kernel.org,
        linux-kernel@...r.kernel.org, benchuanggli@...il.com,
        HL.Liu@...esyslogic.com.tw, Greg.tu@...esyslogic.com.tw,
        takahiro.akashi@...aro.org, dlunev@...omium.org
Subject: Re: [PATCH V9 04/23] mmc: core: Extend support for mmc regulators
 with a vqmmc2

On Tue, Aug 8, 2023 at 6:28 PM Ulf Hansson <ulf.hansson@...aro.org> wrote:
>
> On Fri, 21 Jul 2023 at 12:14, Victor Shih <victorshihgli@...il.com> wrote:
> >
> > From: Ulf Hansson <ulf.hansson@...aro.org>
> >
> > Updates in V4:
> >  - Moved the voltage defines into this patch.
> >
> > Update in previous version:
>
> Please drop the version information from the commit message.
>

Hi, Ulf

     I will update this  in the V10 version.

Thanks, Victor Shih

> > To allow an additional external regulator to be controlled by an mmc host
> > driver, let's add support for a vqmmc2 regulator to the mmc core.
> >
> > For an SD UHS-II interface the vqmmc2 regulator may correspond to the so
> > called vdd2 supply, as described by the SD spec. Initially, only 1.8V is
> > needed, hence limit the new helper function, mmc_regulator_set_vqmmc2() to
> > this too.
> >
> > Note that, to allow for flexibility mmc host drivers need to manage the
> > enable/disable of the vqmmc2 regulator themselves, while the regulator is
> > looked up through the common mmc_regulator_get_supply().
> >
> > Signed-off-by: Ulf Hansson <ulf.hansson@...aro.org>
>
> [...]
>
> Kind regards
> Uffe