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

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Message-Id: <20191024142939.25920-1-andrey.zhizhikin@leica-geosystems.com>
Date:   Thu, 24 Oct 2019 14:29:37 +0000
From:   Andrey Zhizhikin <andrey.z@...il.com>
To:     lgirdwood@...il.com, broonie@...nel.org,
        andriy.shevchenko@...ux.intel.com, lee.jones@...aro.org,
        linux-kernel@...r.kernel.org
Cc:     Andrey Zhizhikin <andrey.zhizhikin@...ca-geosystems.com>
Subject: [PATCH 0/2] add regulator driver and mfd cell for Intel Cherry Trail Whiskey Cove PMIC

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.

Andrey Zhizhikin (2):
  regulator: add support for Intel Cherry Whiskey Cove regulator
  mfd: add regulator cell to Cherry Trail Whiskey Cove PMIC

 drivers/mfd/intel_soc_pmic_chtwc.c            |  15 +-
 drivers/regulator/Kconfig                     |  10 +
 drivers/regulator/Makefile                    |   1 +
 drivers/regulator/intel-cht-wc-regulator.c    | 433 ++++++++++++++++++
 .../linux/regulator/intel-cht-wc-regulator.h  |  64 +++
 5 files changed, 521 insertions(+), 2 deletions(-)
 create mode 100644 drivers/regulator/intel-cht-wc-regulator.c
 create mode 100644 include/linux/regulator/intel-cht-wc-regulator.h

-- 
2.17.1