[U-Boot] [PATCH v3 04/10] arm: exynos: Add methods to control power to USB 3.0 PHY

Vivek Gautam
2013-09-14T08:32:47Z

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>
---

Changes since v2:
- Nothing.

arch/arm/cpu/armv7/exynos/power.c | 22 ++++++++++++++++++++++
arch/arm/include/asm/arch-exynos/power.h | 5 +++++
2 files changed, 27 insertions(+), 0 deletions(-)

diff --git a/arch/arm/cpu/armv7/exynos/power.c b/arch/arm/cpu/armv7/exynos/power.c
index 517e804..563abd7 100644
--- a/arch/arm/cpu/armv7/exynos/power.c
+++ b/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;
diff --git a/arch/arm/include/asm/arch-exynos/power.h b/arch/arm/include/asm/arch-exynos/power.h
index 3241327..8db18c5 100644
--- a/arch/arm/include/asm/arch-exynos/power.h
+++ b/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)
--
1.7.6.5