[PATCH v2 0/6] i2c bus recovery for Microchip SoCs

From: Codrin.Ciubotariu
Date: Fri Jan 03 2020 - 04:49:36 EST

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 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

Codrin Ciubotariu (1):
i2c: at91: Send bus clear command if SCL 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 | 9 ++
drivers/i2c/busses/i2c-at91-master.c | 101 ++++++++++++++++++
drivers/i2c/busses/i2c-at91.h | 15 ++-
8 files changed, 254 insertions(+), 13 deletions(-)