From mboxrd@z Thu Jan 1 00:00:00 1970 From: wulf@rock-chips.com (William Wu) Date: Mon, 7 Nov 2016 21:00:58 +0800 Subject: [PATCH] phy: rockchip-inno-usb2: correct 480MHz output clock stable time Message-ID: <1478523658-9400-1-git-send-email-wulf@rock-chips.com> To: linux-arm-kernel@lists.infradead.org List-Id: linux-arm-kernel.lists.infradead.org We found that the system crashed due to 480MHz output clock of USB2 PHY was unstable after clock had been enabled by gpu module. Theoretically, 1 millisecond is a critical value for 480MHz output clock stable time, so we try to change the delay time to 1.2 millisecond to avoid this issue. Signed-off-by: William Wu --- drivers/phy/phy-rockchip-inno-usb2.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/phy/phy-rockchip-inno-usb2.c b/drivers/phy/phy-rockchip-inno-usb2.c index ecfd7d1..8f2d2b6 100644 --- a/drivers/phy/phy-rockchip-inno-usb2.c +++ b/drivers/phy/phy-rockchip-inno-usb2.c @@ -267,7 +267,7 @@ static int rockchip_usb2phy_clk480m_enable(struct clk_hw *hw) return ret; /* waitting for the clk become stable */ - mdelay(1); + udelay(1200); } return 0; -- 2.0.0