summaryrefslogtreecommitdiff
path: root/Documentation
diff options
context:
space:
mode:
authorWenyou Yang <wenyou.yang@atmel.com>2016-06-08 12:15:10 +0800
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2016-06-07 22:19:59 -0700
commit7150bc9b4d43471fa37b26f5839892d4cf1fe09b (patch)
treef5b75ed7bd53693c71578e8ade5f3ae9511a460e /Documentation
parent62c32e4641e7c5f6e0cad72bea0c8645c33d51b6 (diff)
usb: ohci-at91: Forcibly suspend ports while USB suspend
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>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/usb/atmel-usb.txt6
1 files changed, 4 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/usb/atmel-usb.txt b/Documentation/devicetree/bindings/usb/atmel-usb.txt
index 5883b73ea1b5..888deaa8a4ca 100644
--- a/Documentation/devicetree/bindings/usb/atmel-usb.txt
+++ b/Documentation/devicetree/bindings/usb/atmel-usb.txt
@@ -3,8 +3,10 @@ Atmel SOC USB controllers
OHCI
Required properties:
- - compatible: Should be "atmel,at91rm9200-ohci" for USB controllers
- used in host mode.
+ - compatible: Should be one of the following
+ "atmel,at91rm9200-ohci" for USB controllers used in host mode.
+ "atmel,sama5d2-ohci" for USB controllers used in host mode
+ on SAMA5D2 which can force to suspend.
- reg: Address and length of the register set for the device
- interrupts: Should contain ehci interrupt
- clocks: Should reference the peripheral, host and system clocks