usb: gadget: composite: Draw 100mA current if not configured

Currently we don't change the current value if device isn't in
configured state. But in battery charging specification (section
1.2 and 1.4.13), it is mentioned that the device can draw up to
100mA of current if it's in unconfigured state. Hence add vbus
draw work in composite_resume to draw 100mA if the device isn't
configured.

Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
Link: https://lore.kernel.org/r/1677217619-10261-3-git-send-email-quic_prashk@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c
index fa7dd6c..36add18 100644 (file)
--- a/drivers/usb/gadget/composite.c
+++ b/drivers/usb/gadget/composite.c
@@ -2531,6 +2531,10 @@ void composite_resume(struct usb_gadget *gadget)
                        usb_gadget_clear_selfpowered(gadget);
 
                usb_gadget_vbus_draw(gadget, maxpower);
+       } else {
+               maxpower = CONFIG_USB_GADGET_VBUS_DRAW;
+               maxpower = min(maxpower, 100U);
+               usb_gadget_vbus_draw(gadget, maxpower);
        }
 
        cdev->suspended = 0;