This patch implements pm_power_off function since a power-down
control register should be set in order to turn off EXYNOS5440.
Otherwise, power domains remain alive despite "poweroff" action.
Signed-off-by: Jungseok Lee <jays.lee@xxxxxxxxxxx>
---
Changes since v1:
- Added a comment to the effect of register configuration.
arch/arm/mach-exynos/common.c | 17 +++++++++++++++--
1 file changed, 15 insertions(+), 2 deletions(-)
diff --git a/arch/arm/mach-exynos/common.c b/arch/arm/mach-exynos/common.c
index ba95e5d..24eaa65 100644
--- a/arch/arm/mach-exynos/common.c
+++ b/arch/arm/mach-exynos/common.c
@@ -294,11 +294,24 @@ void exynos5_restart(enum reboot_mode mode, const char *cmd)
__raw_writel(val, addr);
}
+static void exynos5440_power_off(void)
+{
+ struct device_node *np;
+ void __iomem *addr;
+
+ np = of_find_compatible_node(NULL, NULL, "samsung,exynos5440-clock");
+
+ /* turn off all power domains */
+ addr = of_iomap(np, 0) + 0x14;
+ __raw_writel(0x1, addr);
+}
+
void __init exynos_init_late(void)
{
- if (of_machine_is_compatible("samsung,exynos5440"))
- /* to be supported later */
+ if (of_machine_is_compatible("samsung,exynos5440")) {
+ pm_power_off = exynos5440_power_off;
return;
+ }
exynos_pm_late_initcall();
}
--
1.7.10.4
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