On Wed, Nov 26, 2014 at 7:14 AM, Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> wrote: >> diff --git a/Documentation/devicetree/bindings/usb/usb-ehci.txt b/Documentation/devicetree/bindings/usb/usb-ehci.txt >> index 43c1a4e..9505c31 100644 >> --- a/Documentation/devicetree/bindings/usb/usb-ehci.txt >> +++ b/Documentation/devicetree/bindings/usb/usb-ehci.txt >> @@ -12,6 +12,8 @@ Optional properties: >> - big-endian-regs : boolean, set this for hcds with big-endian registers >> - big-endian-desc : boolean, set this for hcds with big-endian descriptors >> - big-endian : boolean, for hcds with big-endian-regs + big-endian-desc >> + - native-endian : boolean, enables big-endian-regs + big-endian-desc >> + iff the kernel was compiled for big endian > > Is this really a property of the hardware? It appears to depend on the > kernel configuration. As such, is it appropriate for DT? Yes, the peripheral registers automatically adjust their endianness to match the CPU. So if the CPU is running an LE kernel, the peripheral needs to be accessed in LE mode; if the CPU is running a BE kernel, the peripheral needs to be accessed in BE mode.
