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Groups > linux.kernel > #1643769
| From | Frank Wang <frank.wang@rock-chips.com> |
|---|---|
| Newsgroups | linux.kernel |
| Subject | [PATCH 1/4] phy: rockchip-inno-usb2: add a delay after phy resume |
| Date | 2017-05-18 05:50 +0200 |
| Message-ID | <tIkBP-49k-11@gated-at.bofh.it> (permalink) |
| References | <tIkBP-49k-9@gated-at.bofh.it> |
| Organization | linux.* mail to news gateway |
From: William Wu <william.wu@rock-chips.com> When resume phy, it need about 1.5 ~ 2ms to wait for utmi_clk which used for USB controller to become stable. Signed-off-by: William Wu <william.wu@rock-chips.com> Signed-off-by: Frank Wang <frank.wang@rock-chips.com> --- 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 8efe78a..f12dc8d 100644 --- a/drivers/phy/phy-rockchip-inno-usb2.c +++ b/drivers/phy/phy-rockchip-inno-usb2.c @@ -463,6 +463,9 @@ 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; } -- 2.0.0
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[PATCH 1/4] phy: rockchip-inno-usb2: add a delay after phy resume Frank Wang <frank.wang@rock-chips.com> - 2017-05-18 05:50 +0200
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