usb: chipidea: support runtime power management for otg fsm mode
This patch adds runtime power management support for otg fsm mode, since A-device in a_idle state cannot detect data pulse irq after suspended, here enable wakeup by connection before suspend to make it can be resumed by DP; and handle wakeup from that state like SRP. Signed-off-by: NLi Jun <jun.li@freescale.com> Signed-off-by: NPeter Chen <peter.chen@freescale.com> Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
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