usb: ohci-at91: Forcibly suspend ports while USB suspend

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In order to the save power consumption, as a workaround, suspend
forcibly the USB PORTA/B/C via set the SUSPEND_A/B/C bits of OHCI
Interrupt Configuration Register in the SFRs while OHCI USB suspend.

This suspend operation must be done before the USB clock is disabled,
resume after the USB clock is enabled.

Signed-off-by: Wenyou Yang <wenyou.yang@atmel.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Wenyou Yang 2016-06-08 12:15:10 +08:00 • committed by Greg Kroah-Hartman

parent 62c32e4641

commit 7150bc9b4d

3 changed files with 112 additions and 3 deletions

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6

Documentation/devicetree/bindings/usb/atmel-usb.txt

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80

drivers/usb/host/ohci-at91.c

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29

include/soc/at91/at91_sfr.h

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