[PATCH 3.12 099/133] i2c: mv64xxx: Document the newly introduced Armada XP A0 compatible

From: Greg Kroah-Hartman
Date: Tue Feb 04 2014 - 17:08:53 EST

3.12-stable review patch. If anyone has any objections, please let me know.


From: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>

commit f8b94beb7e6a374cb0de531b72377c49857b35ca upstream.

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: Gregory CLEMENT <gregory.clement@xxxxxxxxxxxxxxxxxx>
Acked-by: Arnd Bergmann <arnd@xxxxxxxx>
cc: devicetree@xxxxxxxxxxxxxxx
Fixes: 930ab3d403ae (i2c: mv64xxx: Add I2C Transaction Generator support)
Signed-off-by: Jason Cooper <jason@xxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)

--- a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
+++ b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
@@ -5,7 +5,11 @@ Required properties :

- reg : Offset and length of the register set for the device
- 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

Optional properties :

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