[PATCH v2 2/4] ARM: exynos: Ensure PM domains are powered at initialization

[Ulf Hansson]

At ->probe() it's common practice for drivers/subsystems to bring their
devices to full power and without depending on CONFIG_PM_RUNTIME.

We could also expect that drivers/subsystems requires their device's
corresponding PM domains to be powered, to successfully complete a
->probe() sequence.

Align to the behavior above, by ensuring all PM domains are powered
prior initialization of a generic PM domain.

Do note, since the generic PM domain will try to power off unused PM
domains at late_init, there should be no increased power consumption
over time, but potentially during boot.

Signed-off-by: Ulf Hansson <ulf.hansson at linaro.org>
---
 arch/arm/mach-exynos/pm_domains.c | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/arch/arm/mach-exynos/pm_domains.c b/arch/arm/mach-exynos/pm_domains.c
index 20f2671..58e18e9 100644
--- a/arch/arm/mach-exynos/pm_domains.c
+++ b/arch/arm/mach-exynos/pm_domains.c
@@ -112,7 +112,7 @@ static __init int exynos4_pm_init_power_domain(void)
 
 	for_each_compatible_node(np, NULL, "samsung,exynos4210-pd") {
 		struct exynos_pm_domain *pd;
-		int on, i;
+		int i;
 		struct device *dev;
 
 		pdev = of_find_device_by_node(np);
@@ -155,9 +155,10 @@ static __init int exynos4_pm_init_power_domain(void)
 			clk_put(pd->oscclk);
 
 no_clk:
-		on = __raw_readl(pd->base + 0x4) & INT_LOCAL_PWR_EN;
+		if (!(__raw_readl(pd->base + 0x4) & INT_LOCAL_PWR_EN))
+			exynos_pd_power_on(&pd->pd);
 
-		pm_genpd_init(&pd->pd, NULL, !on);
+		pm_genpd_init(&pd->pd, NULL, false);
 		of_genpd_add_provider_simple(np, &pd->pd);
 	}
 
-- 
1.9.1