[U-Boot] [PATCH 08/16] usb: dwc2: force reset assert before to probe the driver

[Lukasz Majewski]

On Fri, 29 Mar 2019 15:42:16 +0100
Patrick Delaunay <patrick.delaunay at st.com> wrote:

> Reset the hardware to be sure of the device state.
> 
> Signed-off-by: Patrick Delaunay <patrick.delaunay at st.com>
> ---
> 
>  drivers/usb/gadget/dwc2_udc_otg.c | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/gadget/dwc2_udc_otg.c
> b/drivers/usb/gadget/dwc2_udc_otg.c index af16fc1..8169fdb 100644
> --- a/drivers/usb/gadget/dwc2_udc_otg.c
> +++ b/drivers/usb/gadget/dwc2_udc_otg.c
> @@ -1049,7 +1049,12 @@ static int dwc2_udc_otg_reset_init(struct
> udevice *dev, if (ret)
>  		return ret;
>  
> -	ret = reset_deassert_bulk(resets);
> +	ret = reset_assert_bulk(resets);
> +
> +	if (!ret) {
> +		udelay(2);
> +		ret = reset_deassert_bulk(resets);
> +	}
>  	if (ret) {
>  		reset_release_bulk(resets);
>  		return ret;

Reviewed-by: Lukasz Majewski <lukma at denx.de>


Best regards,

Lukasz Majewski

--

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