[3.19.y-ckt stable] Patch "ARM: mvebu: fix suspend to RAM on big-endian configurations" has been added to staging queue

[Kamal Mostafa]

This is a note to let you know that I have just added a patch titled

    ARM: mvebu: fix suspend to RAM on big-endian configurations

to the linux-3.19.y-queue branch of the 3.19.y-ckt extended stable tree 
which can be found at:

    http://kernel.ubuntu.com/git/ubuntu/linux.git/log/?h=linux-3.19.y-queue

This patch is scheduled to be released in version 3.19.y-ckt4.

If you, or anyone else, feels it should not be added to this tree, please 
reply to this email.

For more information about the 3.19.y-ckt tree, see
https://wiki.ubuntu.com/Kernel/Dev/ExtendedStable

Thanks.
-Kamal

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>From 8377ce9b82fbf4769b4f57c0f2db3b51f0c9fa06 Mon Sep 17 00:00:00 2001
From: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Date: Tue, 16 Jun 2015 14:12:57 +0200
Subject: ARM: mvebu: fix suspend to RAM on big-endian configurations

commit 2f5bc307be2480ba89e4c5d118f406f04a4a7299 upstream.

The current Armada XP suspend to RAM implementation, as added in
commit 27432825ae19f ("ARM: mvebu: Armada XP GP specific
suspend/resume code") does not handle big-endian configurations
properly: the small bit of assembly code putting the DRAM in
self-refresh and toggling the GPIOs to turn off power forgets to
convert the values to little-endian.

This commit fixes that by making sure the two values we will write to
the DRAM controller register and GPIO register are already in
little-endian before entering the critical assembly code.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni at free-electrons.com>
Fixes: 27432825ae19f ("ARM: mvebu: Armada XP GP specific suspend/resume code")
Signed-off-by: Kamal Mostafa <kamal at canonical.com>
---
 arch/arm/mach-mvebu/pm-board.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/mach-mvebu/pm-board.c b/arch/arm/mach-mvebu/pm-board.c
index 6dfd4ab..301ab38 100644
--- a/arch/arm/mach-mvebu/pm-board.c
+++ b/arch/arm/mach-mvebu/pm-board.c
@@ -43,6 +43,9 @@ static void mvebu_armada_xp_gp_pm_enter(void __iomem *sdram_reg, u32 srcmd)
 	for (i = 0; i < ARMADA_XP_GP_PIC_NR_GPIOS; i++)
 		ackcmd |= BIT(pic_raw_gpios[i]);

+	srcmd = cpu_to_le32(srcmd);
+	ackcmd = cpu_to_le32(ackcmd);
+
 	/*
 	 * Wait a while, the PIC needs quite a bit of time between the
 	 * two GPIO commands.
--
1.9.1