arm: exynos: Add methods to control power to USB 3.0 PHY

Adding methods to turn on/off power to USB3.0 type PHY
as and when required by the controller.

Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Cc: Julius Werner <jwerner@chromium.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Minkyu Kang <mk7.kang@samsung.com>
Cc: Dan Murphy <dmurphy@ti.com>
Cc: Marek Vasut <marex@denx.de>

arch/arm/cpu/armv7/exynos/power.c

@@ -59,6 +59,28 @@ void set_usbhost_phy_ctrl(unsigned int enable)
 		exynos5_set_usbhost_phy_ctrl(enable);
 }
 
+static void exynos5_set_usbdrd_phy_ctrl(unsigned int enable)
+{
+	struct exynos5_power *power =
+		(struct exynos5_power *)samsung_get_base_power();
+
+	if (enable) {
+		/* Enabling USBDRD_PHY */
+		setbits_le32(&power->usbdrd_phy_control,
+				POWER_USB_DRD_PHY_CTRL_EN);
+	} else {
+		/* Disabling USBDRD_PHY */
+		clrbits_le32(&power->usbdrd_phy_control,
+				POWER_USB_DRD_PHY_CTRL_EN);
+	}
+}
+
+void set_usbdrd_phy_ctrl(unsigned int enable)
+{
+	if (cpu_is_exynos5())
+		exynos5_set_usbdrd_phy_ctrl(enable);
+}
+
 static void exynos5_dp_phy_control(unsigned int enable)
 {
 	unsigned int cfg;

arch/arm/include/asm/arch-exynos/power.h

@@ -847,6 +847,11 @@ void set_hw_thermal_trip(void);
 #define POWER_USB_HOST_PHY_CTRL_EN		(1 << 0)
 #define POWER_USB_HOST_PHY_CTRL_DISABLE		(0 << 0)
 
+void set_usbdrd_phy_ctrl(unsigned int enable);
+
+#define POWER_USB_DRD_PHY_CTRL_EN		(1 << 0)
+#define POWER_USB_DRD_PHY_CTRL_DISABLE		(0 << 0)
+
 void set_dp_phy_ctrl(unsigned int enable);
 
 #define EXYNOS_DP_PHY_ENABLE		(1 << 0)