usb: phy: mxs: Add auto clock and power setting

The auto setting is used to open related power and clocks
automatically after receiving wakeup signal.

With this feature, the PHY's clock and power can be recovered
correctly from low power mode, it is guaranteed by IC logic.

Signed-off-by: Peter Chen <peter.chen@freescale.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>

1 files changed, 17 insertions, 3 deletions

diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c
index cf58d8ec9901..d7adca3738ff 100644
--- a/drivers/usb/phy/phy-mxs-usb.c
+++ b/drivers/usb/phy/phy-mxs-usb.c
@@ -31,6 +31,11 @@
 
 #define BM_USBPHY_CTRL_SFTRST                   BIT(31)
 #define BM_USBPHY_CTRL_CLKGATE                  BIT(30)
+#define BM_USBPHY_CTRL_ENAUTOSET_USBCLKS        BIT(26)
+#define BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE     BIT(25)
+#define BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD        BIT(20)
+#define BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE        BIT(19)
+#define BM_USBPHY_CTRL_ENAUTO_PWRON_PLL         BIT(18)
 #define BM_USBPHY_CTRL_ENUTMILEVEL3             BIT(15)
 #define BM_USBPHY_CTRL_ENUTMILEVEL2             BIT(14)
 #define BM_USBPHY_CTRL_ENHOSTDISCONDETECT       BIT(1)
@@ -96,9 +101,18 @@ static int mxs_phy_hw_init(struct mxs_phy *mxs_phy)
         /* Power up the PHY */
         writel(0, base + HW_USBPHY_PWD);
 
-        /* enable FS/LS device */
-        writel(BM_USBPHY_CTRL_ENUTMILEVEL2 |
-               BM_USBPHY_CTRL_ENUTMILEVEL3,
+        /*
+         * USB PHY Ctrl Setting
+         * - Auto clock/power on
+         * - Enable full/low speed support
+         */
+        writel(BM_USBPHY_CTRL_ENAUTOSET_USBCLKS |
+                BM_USBPHY_CTRL_ENAUTOCLR_USBCLKGATE |
+                BM_USBPHY_CTRL_ENAUTOCLR_PHY_PWD |
+                BM_USBPHY_CTRL_ENAUTOCLR_CLKGATE |
+                BM_USBPHY_CTRL_ENAUTO_PWRON_PLL |
+                BM_USBPHY_CTRL_ENUTMILEVEL2 |
+                BM_USBPHY_CTRL_ENUTMILEVEL3,
                base + HW_USBPHY_CTRL_SET);
 
         return 0;