linux-kernel - [PATCH 0/2] Add I2C bus recovery support on Kunpeng 920/930

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Message-ID: <20220125124930.50369-1-yangyicong@hisilicon.com>
Date:   Tue, 25 Jan 2022 20:49:28 +0800
From:   Yicong Yang <yangyicong@...ilicon.com>
To:     <jarkko.nikula@...ux.intel.com>,
        <andriy.shevchenko@...ux.intel.com>,
        <mika.westerberg@...ux.intel.com>, <wsa@...nel.org>,
        <linux-i2c@...r.kernel.org>, <linux-kernel@...r.kernel.org>
CC:     <yangyicong@...ilicon.com>, <prime.zeng@...ilicon.com>,
        <linuxarm@...wei.com>
Subject: [PATCH 0/2] Add I2C bus recovery support on Kunpeng 920/930

This series adds the I2C bus recovery support on Kunpeng 920/930.
We're using HiSilicon I2C controller on Kunpeng 930 and Designware
I2C controller on Kunpeng 920. For both platform, the SCL/SDA pins
are multiplexed with GPIOs. Both driver use generic GPIO recovery
method and we need to switch the pin mutiplexing before/after the
recovery process. We use ACPI method to help on the pin mux switching
which is also introduced in this series.

Yicong Yang (2):
  i2c: hisi: Add generic GPIO bus recovery support
  i2c: designware: Add ACPI assisted recovery support

 drivers/i2c/busses/i2c-designware-core.h    |  2 +
 drivers/i2c/busses/i2c-designware-master.c  | 84 ++++++++++++++++++++-
 drivers/i2c/busses/i2c-designware-platdrv.c |  6 +-
 drivers/i2c/busses/i2c-hisi.c               | 78 +++++++++++++++++++
 4 files changed, 164 insertions(+), 6 deletions(-)

-- 
2.24.0