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Commit 2ed5f236 authored by Tomasz Figa's avatar Tomasz Figa Committed by Kukjin Kim
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ARM: EXYNOS: Detect power domain state on registration from DT 



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: default avatarTomasz Figa <t.figa@samsung.com>
Signed-off-by: default avatarKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: default avatarKukjin Kim <kgene.kim@samsung.com>
parent cf7c397b

Documentation/devicetree/bindings/arm/exynos/power_domain.txt

+0 −4
Original line number Diff line number Diff line
@@ -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 {

arch/arm/mach-exynos/pm_domains.c

+5 −3
Original line number Diff line number Diff line
@@ -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;

}