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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>
This commit is contained in:
Bartlomiej Zolnierkiewicz 2014-09-25 17:59:41 +09:00 committed by Kukjin Kim
parent c2dd114d24
commit 42d5dc3786
1 changed files with 4 additions and 1 deletions
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5
arch/arm/mach-exynos/exynos.c
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@ -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);