diff options
| -rw-r--r-- | drivers/usb/phy/phy-tegra-usb.c | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/drivers/usb/phy/phy-tegra-usb.c b/drivers/usb/phy/phy-tegra-usb.c index a48452a6172b..10fafcf9801b 100644 --- a/drivers/usb/phy/phy-tegra-usb.c +++ b/drivers/usb/phy/phy-tegra-usb.c @@ -64,6 +64,7 @@ #define A_VBUS_VLD_WAKEUP_EN BIT(30) #define USB_PHY_VBUS_WAKEUP_ID 0x408 +#define VBUS_WAKEUP_STS BIT(10) #define VBUS_WAKEUP_WAKEUP_EN BIT(30) #define USB1_LEGACY_CTRL 0x410 @@ -642,6 +643,15 @@ static int utmi_phy_power_off(struct tegra_usb_phy *phy) void __iomem *base = phy->regs; u32 val; + /* + * Give hardware time to settle down after VBUS disconnection, + * otherwise PHY will immediately wake up from suspend. + */ + if (phy->wakeup_enabled && phy->mode != USB_DR_MODE_HOST) + readl_relaxed_poll_timeout(base + USB_PHY_VBUS_WAKEUP_ID, + val, !(val & VBUS_WAKEUP_STS), + 5000, 100000); + utmi_phy_clk_disable(phy); /* PHY won't resume if reset is asserted */ |