[PATCH 4/4] CI13xxx: Add USB host interrupt notifier

[Marek Vasut <marex@xxxxxxx>]

This comes handy on the i.MX28 CPU, where the host IRQ also signalises
that the disconnection detector shall be enabled/disabled on the PHY.

Signed-off-by: Marek Vasut <marex@xxxxxxx>
Cc: Alan Stern <stern@xxxxxxxxxxxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Felipe Balbi <balbi@xxxxxx>
Cc: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
Cc: Linux USB <linux-usb@xxxxxxxxxxxxxxx>
---
 drivers/usb/chipidea/host.c  |    4 ++++
 include/linux/usb/chipidea.h |    1 +
 2 files changed, 5 insertions(+)

diff --git a/drivers/usb/chipidea/host.c b/drivers/usb/chipidea/host.c
index 9eacd21..97bb167 100644
--- a/drivers/usb/chipidea/host.c
+++ b/drivers/usb/chipidea/host.c
@@ -94,6 +94,10 @@ static const struct hc_driver ci_ehci_hc_driver = {
 
 static irqreturn_t host_irq(struct ci13xxx *ci)
 {
+	if (ci->udc_driver->notify_event)
+		ci->udc_driver->notify_event(ci,
+			CI13XXX_CONTROLLER_HOST_IRQ_EVENT);
+
 	return usb_hcd_irq(ci->irq, ci->hcd);
 }
 
diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index edb90d6..231aad9 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -19,6 +19,7 @@ struct ci13xxx_udc_driver {
 
 #define CI13XXX_CONTROLLER_RESET_EVENT		0
 #define CI13XXX_CONTROLLER_STOPPED_EVENT	1
+#define CI13XXX_CONTROLLER_HOST_IRQ_EVENT	2
 	void	(*notify_event) (struct ci13xxx *udc, unsigned event);
 };
 
-- 
1.7.10

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