[PATCH 1/1] ARM: multi_v7_defconfig: Enable Exynos5420 Multi-Cluster PM support

Javier Martinez Canillas javier.martinez at collabora.co.uk
Wed Jan 28 06:40:20 PST 2015

The Exynos5420 cluster power management support allowing Exynos
5420/5422/5800 machines to power up and down the secondary CPUs.

Without this option enabled, the secondary CPUs are not brought
up on boot and the following error is shown:

CPU0: thread -1, cpu 0, socket 0, mpidr 80000000
Setting up static identity map for 0x40938e90 - 0x40938f28
ARM CCI driver probed
CPU1: failed to boot: -38
CPU2: failed to boot: -38
CPU3: failed to boot: -38
CPU4: failed to boot: -38
CPU5: failed to boot: -38
CPU6: failed to boot: -38
CPU7: failed to boot: -38
Brought up 1 CPUs

Signed-off-by: Javier Martinez Canillas <javier.martinez at collabora.co.uk>

This patch was tested on an Exynos5420 Peach Pit and with MCPM support
enabled, all the 8 CPUs are powered up:

Brought up 8 CPUs
SMP: Total of 8 processors activated (384.00 BogoMIPS).

 arch/arm/configs/multi_v7_defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm/configs/multi_v7_defconfig b/arch/arm/configs/multi_v7_defconfig
index 6e974b6bfa90..e8a4c955241b 100644
--- a/arch/arm/configs/multi_v7_defconfig
+++ b/arch/arm/configs/multi_v7_defconfig
@@ -61,6 +61,7 @@ CONFIG_MACH_SPEAR1310=y

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