Re: [PATCH] usb: dwc2: gadget: On USB RESET reset device address to zero

[John Youn]

On 07/11/2017 03:25 AM, Minas Harutyunyan wrote:
> Reseted DEVADDR field in DCFG to zero on USB RESET.
>
> Device address in DCFG register does not reset to zero,
> which required to pass enumeration, after disconnect and
> reconnect.
>
> Signed-off-by: Minas Harutyunyan <hminas@xxxxxxxxxxxx>
> ---
>  drivers/usb/dwc2/gadget.c | 3 +++
>  1 file changed, 3 insertions(+)
>
> diff --git a/drivers/usb/dwc2/gadget.c b/drivers/usb/dwc2/gadget.c
> index 98a4a79e7f6e..c5c0a26a4d66 100644
> --- a/drivers/usb/dwc2/gadget.c
> +++ b/drivers/usb/dwc2/gadget.c
> @@ -3561,6 +3561,9 @@ static irqreturn_t dwc2_hsotg_irq(int irq, void *pw)
>  		/* Report disconnection if it is not already done. */
>  		dwc2_hsotg_disconnect(hsotg);
>
> +		/* Reset device address to zero */
> +		__bic32(hsotg->regs + DCFG, DCFG_DEVADDR_MASK);
> +
>  		if (usb_status & GOTGCTL_BSESVLD && connected)
>  			dwc2_hsotg_core_init_disconnected(hsotg, true);
>  	}
>

Acked-by: John Youn <johnyoun@xxxxxxxxxxxx>


John