[PATCH v3 1/4] ARM: EXYNOS: pm_domain: Detect domain state on registration from DT

[t.figa@samsung.com (Tomasz Figa)]

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>
---
 Documentation/devicetree/bindings/arm/exynos/power_domain.txt | 4 ----
 arch/arm/mach-exynos/pm_domains.c                             | 8 +++++---
 2 files changed, 5 insertions(+), 7 deletions(-)

diff --git a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
index 6528e21..843b546 100644
--- a/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
+++ b/Documentation/devicetree/bindings/arm/exynos/power_domain.txt
@@ -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 {
diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
index c0bc83a..d1abc1a 100644
--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -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;
 }
-- 
1.8.0