EXYNOS5: Add function to setup set ps hold

This patch adds a function to set ps_hold data driving value high.
This enables the machine to stay powered on even after the initial
power-on condition goes away(e.g. power button).

Acked-by: Simon Glass <sjg@chromium.org>
Signed-off-by: Rajeshwari Shinde <rajeshwari.s@samsung.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
index d4bce6d4ddad74ab150e61e6d4dd9e470839999d..400c8bcfc5f2f97f623002619d69674b7ba94754 100644 (file)
--- a/arch/arm/cpu/armv7/exynos/power.c
+++ b/arch/arm/cpu/armv7/exynos/power.c
@@ -95,3 +95,19 @@ void set_dp_phy_ctrl(unsigned int enable)
        if (cpu_is_exynos5())
                exynos5_dp_phy_control(enable);
 }
+
+static void exynos5_set_ps_hold_ctrl(void)
+{
+       struct exynos5_power *power =
+               (struct exynos5_power *)samsung_get_base_power();
+
+       /* Set PS-Hold high */
+       setbits_le32(&power->ps_hold_control,
+                       EXYNOS_PS_HOLD_CONTROL_DATA_HIGH);
+}
+
+void set_ps_hold_ctrl(void)
+{
+       if (cpu_is_exynos5())
+               exynos5_set_ps_hold_ctrl();
+}

diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h
index d2fdb598174172a9f5ddd5ed3c91dd704911f583..f2f73faa759c9086a01c00fd3ac2bb5646e795ab 100644 (file)
--- a/arch/arm/include/asm/arch-exynos/power.h
+++ b/arch/arm/include/asm/arch-exynos/power.h
@@ -864,4 +864,13 @@ void set_dp_phy_ctrl(unsigned int enable);
 
 #define EXYNOS_DP_PHY_ENABLE           (1 << 0)
 
+#define EXYNOS_PS_HOLD_CONTROL_DATA_HIGH       (1 << 8)
+
+/*
+ * Set ps_hold data driving value high
+ * This enables the machine to stay powered on
+ * after the initial power-on condition goes away
+ * (e.g. power button).
+ */
+void set_ps_hold_ctrl(void);
 #endif