usb: gadget: Add function wakeup support

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USB3.2 spec section 9.2.5.4 quotes that a function may signal that
it wants to exit from Function Suspend by sending a Function
Wake Notification to the host if it is enabled for function
remote wakeup. Add an api in composite layer that can be used
by the function drivers to support this feature. Also expose
a gadget op so that composite layer can trigger a wakeup request
to the UDC driver.

Reviewed-by: Thinh Nguyen <Thinh.Nguyen@synopsys.com>
Signed-off-by: Elson Roy Serrao <quic_eserrao@quicinc.com>
Link: https://lore.kernel.org/r/1679694482-16430-4-git-send-email-quic_eserrao@quicinc.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Elson Roy Serrao 2023-03-24 14:47:59 -07:00 • committed by Greg Kroah-Hartman

parent 047161686b

commit f0db885fb0

3 changed files with 47 additions and 0 deletions

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6

include/linux/usb/composite.h

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1

include/linux/usb/gadget.h

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