Commit f8b94beb authored by Gregory CLEMENT's avatar Gregory CLEMENT Committed by Jason Cooper

i2c: mv64xxx: Document the newly introduced Armada XP A0 compatible

The first variants of Armada XP SoCs (A0 stepping) have issues related
to the i2c controller which prevent to use the offload mechanism and
lead to a kernel hang during boot.

The commit introduces a new the compatible string
marvell,mv78230-a0-i2c for the i2c controller.
Signed-off-by: default avatarGregory CLEMENT <gregory.clement@free-electrons.com>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
cc: devicetree@vger.kernel.org
Cc: stable@vger.kernel.org # v3.12+: af8d1c63: ARM: mvebu: Add support to get the ID and the revision of a SoC
Cc: stable@vger.kernel.org # v3.12+: 85e618a1: ARM: mvebu: Add quirk for i2c for the OpenBlocks AX3-4 board
Cc: stable@vger.kernel.org # v3.12+: 6cf70ae9: i2c: mv64xxx: Fix bus hang on A0 version of the Armada XP SoCs
Cc: stable@vger.kernel.org # v3.12+
Fixes: 930ab3d4 (i2c: mv64xxx: Add I2C Transaction Generator support)
Signed-off-by: default avatarJason Cooper <jason@lakedaemon.net>
parent 6cf70ae9
...@@ -5,7 +5,11 @@ Required properties : ...@@ -5,7 +5,11 @@ Required properties :
- reg : Offset and length of the register set for the device - reg : Offset and length of the register set for the device
- compatible : Should be "marvell,mv64xxx-i2c" or "allwinner,sun4i-i2c" - compatible : Should be "marvell,mv64xxx-i2c" or "allwinner,sun4i-i2c"
or "marvell,mv78230-i2c" or "marvell,mv78230-i2c" or "marvell,mv78230-a0-i2c"
Note: Only use "marvell,mv78230-a0-i2c" for a very rare,
initial version of the SoC which had broken offload
support. Linux auto-detects this and sets it
appropriately.
- interrupts : The interrupt number - interrupts : The interrupt number
Optional properties : Optional properties :
......
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