diff options
Diffstat (limited to 'drivers/usb/phy/phy-mxs-usb.c')
| -rw-r--r-- | drivers/usb/phy/phy-mxs-usb.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/usb/phy/phy-mxs-usb.c b/drivers/usb/phy/phy-mxs-usb.c index c3177a1757ee..8f7cb068d29b 100644 --- a/drivers/usb/phy/phy-mxs-usb.c +++ b/drivers/usb/phy/phy-mxs-usb.c @@ -371,10 +371,16 @@ static int mxs_phy_suspend(struct usb_phy *x, int suspend) * connect. The low speed connection will have problem at * very rare cases during usb suspend and resume process. */ - if (low_speed_connection & vbus_is_on) - writel(0xfffbffff, x->io_priv + HW_USBPHY_PWD); - else + if (low_speed_connection & vbus_is_on) { + /* + * If value to be set as pwd value is not 0xffffffff, + * several 32Khz cycles are needed. + */ + mxs_phy_clock_switch_delay(); + writel(0xffbfffff, x->io_priv + HW_USBPHY_PWD); + } else { writel(0xffffffff, x->io_priv + HW_USBPHY_PWD); + } writel(BM_USBPHY_CTRL_CLKGATE, x->io_priv + HW_USBPHY_CTRL_SET); clk_disable_unprepare(mxs_phy->clk); |