usb: composite gadget: set vbus_draw current limitation during suspend

This patch modifies the composite gadget to set vbus_draw current limitation
during suspend state. This current limitation in suspend state shouldn't be
more than 2.5mA

Signed-off-by: Hao Wu <hao.wu@intel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

1 files changed, 8 insertions, 0 deletions

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index d3493fede64a..21dc0da36ab7 100644
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -1188,6 +1188,8 @@ composite_suspend(struct usb_gadget *gadget)
                 composite->suspend(cdev);
 
         cdev->suspended = 1;
+
+        usb_gadget_vbus_draw(gadget, 2);
 }
 
 static void
@@ -1195,6 +1197,7 @@ composite_resume(struct usb_gadget *gadget)
 {
         struct usb_composite_dev        *cdev = get_gadget_data(gadget);
         struct usb_function             *f;
+        u8                              maxpower;
 
         /* REVISIT:  should we have config level
          * suspend/resume callbacks?
@@ -1207,6 +1210,11 @@ composite_resume(struct usb_gadget *gadget)
                         if (f->resume)
                                 f->resume(f);
                 }
+
+                maxpower = cdev->config->bMaxPower;
+
+                usb_gadget_vbus_draw(gadget, maxpower ?
+                        (2 * maxpower) : CONFIG_USB_GADGET_VBUS_DRAW);
         }
 
         cdev->suspended = 0;