Re: [PATCH] usb-musb: keep VBUS on when device is disconnected

Tony Lindgren
2017-05-11T20:27:33Z

* Tony Lindgren <tony@atomide.com> [170511 13:26]:
> diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
> --- a/drivers/usb/musb/musb_dsps.c
> +++ b/drivers/usb/musb/musb_dsps.c
> @@ -270,6 +270,10 @@ static int dsps_check_status(struct musb *musb, void *unused)
> musb_writel(musb->ctrl_base, wrp->coreintr_set,
> MUSB_INTR_VBUSERROR << wrp->usb_shift);
> break;
> + case OTG_STATE_A_HOST:
> + if (glue->vbus_irq)
> + dsps_mod_timer(glue, 20000); /* 20s */
> + break;
> default:
> break;
> }
> --

Heh that's the wrong way around.. I think we can leave out the check
for vbus_irq.

8< ---------------
diff --git a/drivers/usb/musb/musb_dsps.c b/drivers/usb/musb/musb_dsps.c
--- a/drivers/usb/musb/musb_dsps.c
+++ b/drivers/usb/musb/musb_dsps.c
@@ -270,6 +270,10 @@ static int dsps_check_status(struct musb *musb, void *unused)
musb_writel(musb->ctrl_base, wrp->coreintr_set,
MUSB_INTR_VBUSERROR << wrp->usb_shift);
break;
+ case OTG_STATE_A_HOST:
+ /* Keep VBUS on after disconnect for 20 seconds */
+ dsps_mod_timer(glue, 20000);
+ break;
default:
break;
}
--
2.13.0