[PATCH 3/3] usb: dwc3-generic: respect role-switch-default-mode
Neil Armstrong
neil.armstrong at linaro.org
Wed Jan 14 15:39:29 CET 2026
On 1/14/26 15:13, Casey Connolly wrote:
> Respect the default mode configured in DT if it is set and dr_mode is
> OTG. This allows the board to prefer host mode even on a DRD capable
> controller.
>
> Signed-off-by: Casey Connolly <casey.connolly at linaro.org>
> ---
> drivers/usb/dwc3/dwc3-generic.c | 5 +++++
> 1 file changed, 5 insertions(+)
>
> diff --git a/drivers/usb/dwc3/dwc3-generic.c b/drivers/usb/dwc3/dwc3-generic.c
> index 7044696ced0c..1aa9fc933282 100644
> --- a/drivers/usb/dwc3/dwc3-generic.c
> +++ b/drivers/usb/dwc3/dwc3-generic.c
> @@ -528,8 +528,13 @@ static int dwc3_glue_bind_common(struct udevice *parent, ofnode node)
> dr_mode = usb_get_dr_mode(dev_ofnode(parent));
> if (!dr_mode)
> dr_mode = usb_get_dr_mode(node);
>
> + /* check default role for DRD controllers */
> + if ((dr_mode == USB_DR_MODE_OTG || dr_mode == USB_DR_MODE_UNKNOWN) &&
> + ofnode_read_bool(node, "usb-role-switch"))
> + dr_mode = usb_get_role_switch_default_mode(node);
> +
> /* usb mode must fallback to peripheral if not known */
> if (dr_mode == USB_DR_MODE_UNKNOWN)
> dr_mode = USB_DR_MODE_OTG;
>
>
So it means that,on phone platforms, the controller will default to host ?
Neil
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