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ARM: EXYNOS: Simplify code in coupled CPU idle hot path 

exynos_enter_aftr() is called by coupled CPU idle code every time CPU
enters idle state, what can be considered as a hot path. Replace
of_machine_is_compatible() call with a simple SoC revision check.

of_machine_is_compatible() function performs a dozen of string comparisons
during the full device tree walk, while soc_is_exynos4412() is a simple
integer check on SoC revision variable.

Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Acked-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
This commit is contained in:
Marek Szyprowski 2018-03-21 10:46:39 +01:00 committed by Krzysztof Kozlowski
parent a7480dbcf9
commit ae35c48356
1 changed files with 1 additions and 1 deletions
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2
arch/arm/mach-exynos/pm.c
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@ -163,7 +163,7 @@ void exynos_enter_aftr(void)
exynos_pm_central_suspend();
if (of_machine_is_compatible("samsung,exynos4412")) {
if (soc_is_exynos4412()) {
/* Setting SEQ_OPTION register */
pmu_raw_writel(S5P_USE_STANDBY_WFI0 | S5P_USE_STANDBY_WFE0,
S5P_CENTRAL_SEQ_OPTION);