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@xxxxxxxxxxxxx> --- drivers/usb/phy/phy-mxs-usb.c | 20 +++++++++++++++++--- 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 6d49040..0c6f3bc 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; -- 1.7.8 -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
