Hello Richard,
looking at the chipidea/udc.c in v3.7-rc2, I found some strange code. It
was added in commit:
8c4fc03 USB: chipidea: add vbus detect for udc
> diff --git a/drivers/usb/chipidea/udc.c b/drivers/usb/chipidea/udc.c
> index d214448..2f45bba 100644
> --- a/drivers/usb/chipidea/udc.c
> +++ b/drivers/usb/chipidea/udc.c
[...]
> @@ -1651,6 +1676,13 @@ static irqreturn_t udc_irq(struct ci13xxx *ci)
> } else {
> retval = IRQ_NONE;
> }
> +
> + intr = hw_read(ci, OP_OTGSC, ~0);
> + hw_write(ci, OP_OTGSC, ~0, intr);
> +
> + if (intr & (OTGSC_AVVIE & OTGSC_AVVIS))
> + queue_work(ci->wq, &ci->vbus_work);
This if is a no-op, as OTG_ are defined as:
#define OTGSC_AVVIS BIT(17)
#define OTGSC_AVVIE BIT(25)
Resulting in queue_work() never called from here.
> +
> spin_unlock(&ci->lock);
>
I'm not that deep into the OTG stuff to fix it properly.
regards, Marc
--
Pengutronix e.K. | Marc Kleine-Budde |
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