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ARM: EXYNOS: allow driver usage on Exynos4x12 SoCs

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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);