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

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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>

Bug: 272680990
(cherry picked from commit 2ae4e0dea3
https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/usb.git/ usb-next)

Change-Id: I51688c84f66d2d5e023b61444e03503092ef41d0
Signed-off-by: Prashanth K <quic_prashk@quicinc.com>
This commit is contained in:
Prashanth K
2023-02-24 11:16:59 +05:30
committed by Treehugger Robot
parent 87a065fb94
commit 8926771f7e
1 changed files with 4 additions and 0 deletions
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drivers/usb/gadget/composite.c
+4
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@@ -2447,6 +2447,10 @@ 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;