On 10/14/19 10:00 AM, Patrick Delaunay wrote:
> Assert reset before deassert in dwc2_reset;
> It should be more safe for DWC2.
Can you be more descriptive about this issue ? I have no idea what this
patch does or fixes from the description.
> Signed-off-by: Patrick Delaunay <patrick.delau...@st.com>
> ---
>
> drivers/usb/host/dwc2.c | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/drivers/usb/host/dwc2.c b/drivers/usb/host/dwc2.c
> index 51023b0c2c..3086411fc4 100644
> --- a/drivers/usb/host/dwc2.c
> +++ b/drivers/usb/host/dwc2.c
> @@ -1149,6 +1149,8 @@ static int dwc2_reset(struct udevice *dev)
> return ret;
> }
>
> + reset_assert_bulk(&priv->resets);
> + udelay(2);
Why is there a 2 uS delay ?
> ret = reset_deassert_bulk(&priv->resets);
> if (ret) {
> reset_release_bulk(&priv->resets);
>
[...]
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