From 5129ee22ce4aff7c5907d4c3d67d23f86cd6db9b Mon Sep 17 00:00:00 2001 From: Andrew Lunn Date: Sat, 26 Jul 2014 19:20:37 +0200 Subject: ARM: mvebu: armada xp: Generalize use of i2c quirk A second product has come to light which makes use of the A0 stepping of the Armada XP SoC. A0 stepping has a hardware bug in the i2c core meaning that hardware offload does not work, resulting in the kernel failing to boot. The quirk detects that the kernel is running on an A0 stepping SoC and disables the use of hardware offload. Currently the quirk is only enabled for PlatHome Openblocks AX3. The AX3 has been produced with both A0 and B0 stepping SoCs. The second product is the Lenovo Iomega IX4-300d. It seems likely that this device will also swap from A0 to B0 SoC sometime during its life. If there are two products using A0, it seems likely there are more products with A0. Also, since the number of A0 SoCs is limited, these products are also likely to transition to B0. Hence detecting at run time is the safest option. So enable the quirk for all Armada XP boards. Tested on an AX3 with A0 stepping. Signed-off-by: Andrew Lunn Acked-by: Gregory CLEMENT Acked-by: Thomas Petazzoni Cc: stable@vger.kernel.org # v3.12+ Fixes: 930ab3d403ae: ("i2c: mv64xxx: Add I2C Transaction Generator support") Link: https://lkml.kernel.org/r/1406395238-29758-2-git-send-email-andrew@lunn.ch Signed-off-by: Jason Cooper --- arch/arm/mach-mvebu/board-v7.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'arch/arm/mach-mvebu') diff --git a/arch/arm/mach-mvebu/board-v7.c b/arch/arm/mach-mvebu/board-v7.c index 6478626e3ff6..d0d39f150fab 100644 --- a/arch/arm/mach-mvebu/board-v7.c +++ b/arch/arm/mach-mvebu/board-v7.c @@ -188,7 +188,7 @@ static void __init thermal_quirk(void) static void __init mvebu_dt_init(void) { - if (of_machine_is_compatible("plathome,openblocks-ax3-4")) + if (of_machine_is_compatible("marvell,armadaxp")) i2c_quirk(); if (of_machine_is_compatible("marvell,a375-db")) { external_abort_quirk(); -- cgit v1.2.3