ARM: EXYNOS: read initial state of power domain from hw registers

Some bootloaders disable unused power domains to reduce power consuption. Power domain driver can easily read the actual state from the hardware registers instead of assuming that their initial state is always 'on'.

Marek Szyprowski committed 14 years ago

Commit 76eb5561 parent bd0a5211 file · +6 −3Browse files

Unified · Split

arch/arm/mach-exynos/pm_domains.c+6−3

@@ -151,9 +151,12 @@ static __init int exynos4_pm_init_power_domain(void) · 150 unmodified lines
151	151	if (of_have_populated_dt())
152	152	return exynos_pm_dt_parse_domains();
153	153
154		− for (idx = 0; idx < ARRAY_SIZE(exynos4_pm_domains); idx++)
155		− pm_genpd_init(&exynos4_pm_domains[idx]->pd, NULL,
156		− exynos4_pm_domains[idx]->is_off);
	154	+ for (idx = 0; idx < ARRAY_SIZE(exynos4_pm_domains); idx++) {
	155	+ struct exynos_pm_domain *pd = exynos4_pm_domains[idx];
	156	+ int on = __raw_readl(pd->base + 0x4) & S5P_INT_LOCAL_PWR_EN;
	157	+
	158	+ pm_genpd_init(&pd->pd, NULL, !on);
	159	+ }
157	160
158	161	#ifdef CONFIG_S5P_DEV_FIMD0
159	162	exynos_pm_add_dev_to_genpd(&s5p_device_fimd0, &exynos4_pd_lcd0);