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authorGregory CLEMENT <gregory.clement@free-electrons.com>2013-12-31 17:07:35 +0100
committerJason Cooper <jason@lakedaemon.net>2014-01-14 02:09:17 +0000
commitf8b94beb7e6a374cb0de531b72377c49857b35ca (patch)
treec654f34401fcfd3903ff05880877d69157ddb8e9 /Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
parent6cf70ae928bae17077efc0d528dec49bc380438b (diff)
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: Gregory CLEMENT <gregory.clement@free-electrons.com> Acked-by: Arnd Bergmann <arnd@arndb.de> cc: devicetree@vger.kernel.org Cc: stable@vger.kernel.org # v3.12+: af8d1c63afcb: ARM: mvebu: Add support to get the ID and the revision of a SoC Cc: stable@vger.kernel.org # v3.12+: 85e618a1be2b: ARM: mvebu: Add quirk for i2c for the OpenBlocks AX3-4 board Cc: stable@vger.kernel.org # v3.12+: 6cf70ae928ba: i2c: mv64xxx: Fix bus hang on A0 version of the Armada XP SoCs Cc: stable@vger.kernel.org # v3.12+ Fixes: 930ab3d403ae (i2c: mv64xxx: Add I2C Transaction Generator support) Signed-off-by: Jason Cooper <jason@lakedaemon.net>
Diffstat (limited to 'Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt')
-rw-r--r--Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt6
1 files changed, 5 insertions, 1 deletions
diff --git a/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt b/Documentation/devicetree/bindings/i2c/i2c-mv64xxx.txt
index 82e8f6f17179..582b4652a82a 100644
--- 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 :