From 2ae4e0dea3b0c7b380821bac05e03a71da1f452f Mon Sep 17 00:00:00 2001 From: Prashanth K Date: Fri, 24 Feb 2023 11:16:59 +0530 Subject: [PATCH] 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 Link: https://lore.kernel.org/r/1677217619-10261-3-git-send-email-quic_prashk@quicinc.com Signed-off-by: Greg Kroah-Hartman --- drivers/usb/gadget/composite.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/usb/gadget/composite.c b/drivers/usb/gadget/composite.c index fa7dd6cf014d7..36add1879ed2e 100644 --- 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; -- 2.30.2