From e759aa4172306f1e1bd89dd0275b4c014f03cfed Mon Sep 17 00:00:00 2001 From: William Wu Date: Fri, 5 May 2017 17:51:41 +0800 Subject: [PATCH] phy: rockchip-inno-usb2: add a delay after phy resume When resume phy, it need about 1.5 ~ 2ms to wait for utmi_clk which used for USB controller to become stable. Change-Id: I319a28069b4b3381f22cc34567226f341e948bd4 Signed-off-by: William Wu --- drivers/phy/phy-rockchip-inno-usb2.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/phy/phy-rockchip-inno-usb2.c b/drivers/phy/phy-rockchip-inno-usb2.c index 6a038a8cb906..0b705b15cd96 100644 --- a/drivers/phy/phy-rockchip-inno-usb2.c +++ b/drivers/phy/phy-rockchip-inno-usb2.c @@ -534,6 +534,9 @@ static int rockchip_usb2phy_power_on(struct phy *phy) if (ret) return ret; + /* waiting for the utmi_clk to become stable */ + usleep_range(1500, 2000); + rport->suspended = false; return 0; } -- 2.34.1