linux-kernel - Re: [PATCH 0/2] add regulator driver and mfd cell for Intel Cherry Trail Whiskey Cove PMIC

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Message-ID: <CAHtQpK5ue=6u9ABugyQgzZODt9XuOyW-H4VvcZV3Vmacx8a6pg@mail.gmail.com>
Date:   Fri, 25 Oct 2019 10:51:23 +0200
From:   Andrey Zhizhikin <andrey.z@...il.com>
To:     Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Cc:     Hans de Goede <hdegoede@...hat.com>,
        Adrian Hunter <adrian.hunter@...el.com>, lgirdwood@...il.com,
        broonie@...nel.org, lee.jones@...aro.org,
        linux-kernel@...r.kernel.org,
        Andrey Zhizhikin <andrey.zhizhikin@...ca-geosystems.com>
Subject: Re: [PATCH 0/2] add regulator driver and mfd cell for Intel Cherry
 Trail Whiskey Cove PMIC

On Fri, Oct 25, 2019 at 9:55 AM Andy Shevchenko
<andriy.shevchenko@...ux.intel.com> wrote:
>
> On Fri, Oct 25, 2019 at 10:53:35AM +0300, Andy Shevchenko wrote:
> > On Thu, Oct 24, 2019 at 02:29:37PM +0000, Andrey Zhizhikin wrote:
> > > This patchset introduces additional regulator driver for Intel Cherry
> > > Trail Whiskey Cove PMIC. It also adds a cell in mfd driver for this
> > > PMIC, which is used to instantiate this regulator.
> > >
> > > Regulator support for this PMIC was present in kernel release from Intel
> > > targeted Aero platform, but was not entirely ported upstream and has
> > > been omitted in mainline kernel releases. Consecutively, absence of
> > > regulator caused the SD Card interface not to be provided with Vqcc
> > > voltage source needed to operate with UHS-I cards.
> > >
> > > Following patches are addessing this issue and making sd card interface
> > > to be fully operable with UHS-I cards. Regulator driver lists an ACPI id
> > > of the SD Card interface in consumers and exposes optional "vqmmc"
> > > voltage source, which mmc driver uses to switch signalling voltages
> > > between 1.8V and 3.3V.
> > >
> > > This set contains of 2 patches: one is implementing the regulator driver
> > > (based on a non upstreamed version from Intel Aero), and another patch
> > > registers this driver as mfd cell in exising Whiskey Cove PMIC driver.
> >
> > Thank you.
> > Hans, Cc'ed, has quite interested in these kind of patches.
> > Am I right, Hans?
>
> Since it's about UHS/SD, Cc to Adrian as well.

Thanks for looking into this, and including also interested people
here. I've included only maintainers, but all interested parties are
also very welcomed.
>
> --
> With Best Regards,
> Andy Shevchenko
>
>

-- 
Regards,
Andrey.