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ARM: EXYNOS: Detect power domain state on registration from DT

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Initial state of power domains might vary on different boards and with
different bootloaders.

This patch adds detection of initial state of power domains when being
registered from DT.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
This commit is contained in:
Tomasz Figa 2012-11-22 00:21:08 +09:00 committed by Kukjin Kim
parent cf7c397b62
commit 2ed5f23671
2 changed files with 5 additions and 7 deletions
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4
Documentation/devicetree/bindings/arm/exynos/power_domain.txt
View file

@ -9,10 +9,6 @@ Required Properties:
- reg: physical base address of the controller and length of memory mapped
region.
Optional Properties:
- samsung,exynos4210-pd-off: Specifies that the power domain is in turned-off
state during boot and remains to be turned-off until explicitly turned-on.
Example:
lcd0: power-domain-lcd0 {

8
arch/arm/mach-exynos/pm_domains.c
View file

@ -89,6 +89,7 @@ static __init int exynos_pm_dt_parse_domains(void)
for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") {
struct exynos_pm_domain *pd;
int on;
pd = kzalloc(sizeof(*pd), GFP_KERNEL);
if (!pd) {
@ -97,14 +98,15 @@ static __init int exynos_pm_dt_parse_domains(void)
return -ENOMEM;
}
if (of_get_property(np, "samsung,exynos4210-pd-off", NULL))
pd->is_off = true;
pd->name = np->name;
pd->base = of_iomap(np, 0);
pd->pd.power_off = exynos_pd_power_off;
pd->pd.power_on = exynos_pd_power_on;
pd->pd.of_node = np;
pm_genpd_init(&pd->pd, NULL, false);
on = __raw_readl(pd->base + 0x4) & S5P_INT_LOCAL_PWR_EN;
pm_genpd_init(&pd->pd, NULL, !on);
}
return 0;
}