usb: chipidea: Use extcon framework for VBUS and ID detect

On recent Qualcomm platforms VBUS and ID lines are not routed to
USB PHY LINK controller. Use extcon framework to receive connect
and disconnect ID and VBUS notification.

Signed-off-by: Ivan T. Ivanov <ivan.ivanov@linaro.org>
Signed-off-by: Peter Chen <peter.chen@freescale.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/include/linux/usb/chipidea.h b/include/linux/usb/chipidea.h
index a41833cd184c..c5cddc6901d0 100644
--- a/include/linux/usb/chipidea.h
+++ b/include/linux/usb/chipidea.h
@@ -5,9 +5,28 @@
 #ifndef __LINUX_USB_CHIPIDEA_H
 #define __LINUX_USB_CHIPIDEA_H
 
+#include <linux/extcon.h>
 #include <linux/usb/otg.h>
 
 struct ci_hdrc;
+
+/**
+ * struct ci_hdrc_cable - structure for external connector cable state tracking
+ * @state: current state of the line
+ * @changed: set to true when extcon event happen
+ * @edev: device which generate events
+ * @ci: driver state of the chipidea device
+ * @nb: hold event notification callback
+ * @conn: used for notification registration
+ */
+struct ci_hdrc_cable {
+        bool                            state;
+        bool                            changed;
+        struct extcon_dev               *edev;
+        struct ci_hdrc                  *ci;
+        struct notifier_block           nb;
+};
+
 struct ci_hdrc_platform_data {
         const char      *name;
         /* offset of the capability registers */
@@ -48,6 +67,10 @@ struct ci_hdrc_platform_data {
         u32                     ahb_burst_config;
         u32                     tx_burst_size;
         u32                     rx_burst_size;
+
+        /* VBUS and ID signal state tracking, using extcon framework */
+        struct ci_hdrc_cable            vbus_extcon;
+        struct ci_hdrc_cable            id_extcon;
 };
 
 /* Default offset of capability registers */