[U-Boot] [RESEND PATCH 3/5] usb: host: dwc2: force reset assert

[Marek Vasut]

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.delaunay at 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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