USB: pxa27x_udc: add vbus_draw callback

[mirror_ubuntu-zesty-kernel.git] / drivers / usb / gadget / pxa27x_udc.c

diff --git a/drivers/usb/gadget/pxa27x_udc.c b/drivers/usb/gadget/pxa27x_udc.c
index 11510472ee006b916db4b6c86eeefd4baf01ff95..e50419d08996f45ec4259030506b95dc3de7e443 100644 (file)
--- a/drivers/usb/gadget/pxa27x_udc.c
+++ b/drivers/usb/gadget/pxa27x_udc.c
@@ -1623,12 +1623,34 @@ static int pxa_udc_vbus_session(struct usb_gadget *_gadget, int is_active)
        return 0;
 }
 
+/**
+ * pxa_udc_vbus_draw - Called by gadget driver after SET_CONFIGURATION completed
+ * @_gadget: usb gadget
+ * @mA: current drawn
+ *
+ * Context: !in_interrupt()
+ *
+ * Called after a configuration was chosen by a USB host, to inform how much
+ * current can be drawn by the device from VBus line.
+ *
+ * Returns 0 or -EOPNOTSUPP if no transceiver is handling the udc
+ */
+static int pxa_udc_vbus_draw(struct usb_gadget *_gadget, unsigned mA)
+{
+       struct pxa_udc *udc;
+
+       udc = to_gadget_udc(_gadget);
+       if (udc->transceiver)
+               return otg_set_power(udc->transceiver, mA);
+       return -EOPNOTSUPP;
+}
+
 static const struct usb_gadget_ops pxa_udc_ops = {
        .get_frame      = pxa_udc_get_frame,
        .wakeup         = pxa_udc_wakeup,
        .pullup         = pxa_udc_pullup,
        .vbus_session   = pxa_udc_vbus_session,
-       /* current versions must always be self-powered */
+       .vbus_draw      = pxa_udc_vbus_draw,
 };
 
 /**