ARM: EXYNOS: allow driver usage on Exynos4x12 SoCs

Register cpuidle platform device on Exynos4x12 SoCs allowing EXYNOS
cpuidle driver usage on these SoCs.

AFTR mode reduces power consumption on Trats2 board (Exynos4412 SoC
with secure firmware enabled) by ~12% when EXYNOS cpuidle driver is
enabled (in both cases the default exynos_defconfig config is used
and CPU1-3 are offlined).

Currently Exynos4412 SoC support is limited to Trats2 board.

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>

diff --git a/arch/arm/mach-exynos/exynos.c b/arch/arm/mach-exynos/exynos.c
index 6b283eb3202ec2ecac7e7742e82ab284f38c808c..a487e59555daf288b59090364979f43993be4e2c 100644 (file)
--- a/arch/arm/mach-exynos/exynos.c
+++ b/arch/arm/mach-exynos/exynos.c
@@ -318,7 +318,10 @@ static void __init exynos_dt_machine_init(void)
                exynos_sysram_init();
 
        if (of_machine_is_compatible("samsung,exynos4210") ||
-                       of_machine_is_compatible("samsung,exynos5250"))
+           of_machine_is_compatible("samsung,exynos4212") ||
+           (of_machine_is_compatible("samsung,exynos4412") &&
+            of_machine_is_compatible("samsung,trats2")) ||
+           of_machine_is_compatible("samsung,exynos5250"))
                platform_device_register(&exynos_cpuidle);
 
        platform_device_register_simple("exynos-cpufreq", -1, NULL, 0);