linux-kernel - [PATCH v3 0/6] i2c bus recovery for Microchip SoCs

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Message-ID: <20200115115422.17097-1-codrin.ciubotariu@microchip.com>
Date:   Wed, 15 Jan 2020 13:54:16 +0200
From:   Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
To:     <linux-i2c@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <kamel.bouhara@...tlin.com>, <wsa@...-dreams.de>,
        <Nicolas.Ferre@...rochip.com>, <alexandre.belloni@...tlin.com>,
        <Ludovic.Desroches@...rochip.com>, <robh@...nel.org>,
        <peda@...ntia.se>, <linux@...linux.org.uk>,
        Codrin Ciubotariu <codrin.ciubotariu@...rochip.com>
Subject: [PATCH v3 0/6] i2c bus recovery for Microchip SoCs

This patch series introduce the i2c bus recovery mechanism
for the Microchip SoCs. Some SoCs have hardware support for
recovery, while for those who don't the i2c-gpio bus recovery
mechanism is used. Updated the corresponding dts to add i2c
gpio pinctrl. The bus recovery is configured for the sama5d2/3/4
xplained and sama5d27 som1 EK boards in dts.

Changes in v3:
 - addressed list comments:
  - removed pull-ups from gpios;
  - removed unused headers from i2c-at91.h;
  - fixed commit message and subject on patch 3/6;
  - added received tags;
 - rebased on top of i2c/for-next;

Changes in v2:
 - integrated the HW CLEAR command patch;
 - call i2c_recover_bus() after an error occurs, if SDA is down;
 - added i2c gpio pinctrl in sama5d2 xplained and sama5d27 som1 EK
   boards;

Codrin Ciubotariu (1):
  i2c: at91: Send bus clear command if SDA is down

Kamel Bouhara (5):
  dt-bindings: i2c: at91: document optional bus recovery properties
  i2c: at91: implement i2c bus recovery
  ARM: at91/dt: sama5d3: add i2c gpio pinctrl
  ARM: at91/dt: sama5d4: add i2c gpio pinctrl
  ARM: at91/dt: sama5d2: add i2c gpio pinctrl

 .../devicetree/bindings/i2c/i2c-at91.txt      |  10 ++
 arch/arm/boot/dts/at91-sama5d2_ptc_ek.dts     |  33 +++++-
 arch/arm/boot/dts/at91-sama5d2_xplained.dts   |  33 +++++-
 arch/arm/boot/dts/sama5d3.dtsi                |  33 +++++-
 arch/arm/boot/dts/sama5d4.dtsi                |  33 +++++-
 drivers/i2c/busses/i2c-at91-core.c            |   2 +
 drivers/i2c/busses/i2c-at91-master.c          | 100 ++++++++++++++++++
 drivers/i2c/busses/i2c-at91.h                 |  11 +-
 8 files changed, 242 insertions(+), 13 deletions(-)

-- 
2.20.1