From 35a7b255bcacc4dd0a5e029fc8e3554853f128e3 Mon Sep 17 00:00:00 2001 From: William Wu Date: Tue, 15 Nov 2016 11:54:07 +0800 Subject: [PATCH] phy: rockchip-inno-usb2: correct 480MHz output clock stable time 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. And the commit ed907fb1d7c3 ("phy: rockchip-inno-usb2: correct clk_ops callback") used prepare callbacks instead of enable callbacks to support gate a clk if the operation may sleep. So we can switch from delay to sleep functions. Also fix a spelling error from "waitting" to "waiting". Change-Id: Ie9883e5e9a3f0c2edec9d259b844ca536348c9cf Signed-off-by: William Wu Reviewed-by: Douglas Anderson Signed-off-by: Kishon Vijay Abraham I --- drivers/phy/phy-rockchip-inno-usb2.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/drivers/phy/phy-rockchip-inno-usb2.c b/drivers/phy/phy-rockchip-inno-usb2.c index 1f1846db4994..27199c3a34b1 100644 --- a/drivers/phy/phy-rockchip-inno-usb2.c +++ b/drivers/phy/phy-rockchip-inno-usb2.c @@ -298,8 +298,8 @@ static int rockchip_usb2phy_clk480m_prepare(struct clk_hw *hw) if (ret) return ret; - /* waitting for the clk become stable */ - udelay(1200); + /* waiting for the clk become stable */ + usleep_range(1200, 1300); } return 0; -- 2.34.1