Some bootloadered disable unused power domains, so kernel code should
read the actual state from the hardware registers instead of assuming
that their initial state is 'on'.
Signed-off-by: Marek Szyprowski <m.szyprowski@xxxxxxxxxxx>
Signed-off-by: Kyungmin Park <kyungmin.park@xxxxxxxxxxx>
---
arch/arm/mach-exynos/pm_domains.c | 8 +++++---
1 files changed, 5 insertions(+), 3 deletions(-)
diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
index 13b3068..b5b92e8 100644
--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -151,9 +151,11 @@ static __init int exynos4_pm_init_power_domain(void)
if (of_have_populated_dt())
return exynos_pm_dt_parse_domains();
- for (idx = 0; idx < ARRAY_SIZE(exynos4_pm_domains); idx++)
- pm_genpd_init(&exynos4_pm_domains[idx]->pd, NULL,
- exynos4_pm_domains[idx]->is_off);
+ for (idx = 0; idx < ARRAY_SIZE(exynos4_pm_domains); idx++) {
+ struct exynos_pm_domain *pd = exynos4_pm_domains[idx];
+ int on = __raw_readl(pd->base + 0x4) & S5P_INT_LOCAL_PWR_EN;
+ pm_genpd_init(&pd->pd, NULL, !on);
+ }
#ifdef CONFIG_S5P_DEV_FIMD0
exynos_pm_add_dev_to_genpd(&s5p_device_fimd0, &exynos4_pd_lcd0);
--
1.7.1.569.g6f426
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