[PATCH] phy: rockchip-inno-usb2: correct 480MHz output clock stable time
William Wu
wulf at rock-chips.com
Mon Nov 7 05:00:58 PST 2016
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 <wulf at rock-chips.com>
---
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
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