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

From: Andy Shevchenko
Date: Fri Oct 25 2019 - 03:55:46 EST

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.

With Best Regards,
Andy Shevchenko