musb_hdrc: Add sysfs notification to mode, only show changes

Add sysfs notification to mode, and only show changed events.

The older "cable" sysfs entry can now be deleted as it does
not really work for OTG.

Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/drivers/usb/musb/musb_core.c b/drivers/usb/musb/musb_core.c
index 253288044ca691887e6de210641aafcae0c632d2..53cb110f09a2fb9f0b0e9757c52a272d4622cee3 100644 (file)
--- a/drivers/usb/musb/musb_core.c
+++ b/drivers/usb/musb/musb_core.c
@@ -1752,12 +1752,17 @@ static DEVICE_ATTR(srp, 0644, NULL, musb_srp_store);
 
 #endif /* sysfs */
 
-/* Only used to provide cable state change events */
+/* Only used to provide driver mode change events */
 static void musb_irq_work(struct work_struct *data)
 {
        struct musb *musb = container_of(data, struct musb, irq_work);
+       static int old_state;
 
-       sysfs_notify(&musb->controller->kobj, NULL, "cable");
+       if (musb->xceiv.state != old_state) {
+               old_state = musb->xceiv.state;
+               sysfs_notify(&musb->controller->kobj, NULL, "cable");
+               sysfs_notify(&musb->controller->kobj, NULL, "mode");
+       }
 }
 
 /* --------------------------------------------------------------------------