From: Olof Johansson <olofj@xxxxxxxxxxxx>
Add pm_power_off callback function for exynos5250 to make soft
power off work properly.
Signed-off-by: Abhilash Kesavan <a.kesavan@xxxxxxxxxxx>
Signed-off-by: Olof Johansson <olofj@xxxxxxxxxxxx>
---
arch/arm/mach-exynos/include/mach/regs-pmu.h | 3 +++
arch/arm/mach-exynos/pmu.c | 20 ++++++++++++++++++++
2 files changed, 23 insertions(+)
diff --git a/arch/arm/mach-exynos/include/mach/regs-pmu.h b/arch/arm/mach-exynos/include/mach/regs-pmu.h
index 2cdb63e..da2fab0 100644
--- a/arch/arm/mach-exynos/include/mach/regs-pmu.h
+++ b/arch/arm/mach-exynos/include/mach/regs-pmu.h
@@ -343,6 +343,7 @@
#define EXYNOS5_TOP_PWR_OPTION S5P_PMUREG(0x2C48)
#define EXYNOS5_TOP_PWR_SYSMEM_OPTION S5P_PMUREG(0x2CC8)
#define EXYNOS5_JPEG_MEM_OPTION S5P_PMUREG(0x2F48)
+#define EXYNOS5_PS_HOLD_CONTROL S5P_PMUREG(0x330C)
#define EXYNOS5_GSCL_STATUS S5P_PMUREG(0x4004)
#define EXYNOS5_ISP_STATUS S5P_PMUREG(0x4024)
#define EXYNOS5_GSCL_OPTION S5P_PMUREG(0x4008)
@@ -365,4 +366,6 @@
#define EXYNOS5_OPTION_USE_RETENTION (1 << 4)
+#define EXYNOS5_PS_HOLD_CONTROL_DATA (1 << 8)
+
#endif /* __ASM_ARCH_REGS_PMU_H */
diff --git a/arch/arm/mach-exynos/pmu.c b/arch/arm/mach-exynos/pmu.c
index 5f4d26b..9053b6c 100644
--- a/arch/arm/mach-exynos/pmu.c
+++ b/arch/arm/mach-exynos/pmu.c
@@ -12,6 +12,8 @@
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/bug.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
#include <mach/regs-clock.h>
@@ -409,6 +411,23 @@ void exynos_sys_powerdown_conf(enum sys_powerdown mode)
}
}
+static void exynos5_power_off(void)
+{
+ unsigned int tmp;
+
+ pr_info("Power down\n");
+ tmp = __raw_readl(EXYNOS5_PS_HOLD_CONTROL);
+ tmp &= ~EXYNOS5_PS_HOLD_CONTROL_DATA;
+ __raw_writel(tmp, EXYNOS5_PS_HOLD_CONTROL);
+
+ /* Wait a little so we don't give a false warning below */
+ mdelay(100);
+
+ pr_err("Power down failed, please power off system manually.\n");
+ while (1)
+ ;
+}
+
static int __init exynos_pmu_init(void)
{
unsigned int value;
@@ -444,6 +463,7 @@ static int __init exynos_pmu_init(void)
__raw_writel(0x0, exynos5_list_disable_pmu_reg[i]);
exynos_pmu_config = exynos5250_pmu_config;
+ pm_power_off = exynos5_power_off;
pr_info("EXYNOS5250 PMU Initialize\n");
} else {
pr_info("EXYNOS: PMU not supported\n");
--
1.7.9.5
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