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>

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();
+}

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