[PATCH 1/2] USB: Update EHCI-platform driver to devicetree.

On Sat, 2012-10-20 at 10:31 -0400, Alan Stern wrote:

On Sat, 20 Oct 2012, Florian Fainelli wrote:

quoted

Hi Tony,

On Saturday 20 October 2012 16:17:32 Tony Prisk wrote:

quoted

This patch adds devicetree support to the EHCI-platform driver,
and removes the now unneeded ehci-vt8500.c

Existing platform properties are maintained, with the exception
the power_(on/off) and suspend function pointers.

Ok, so I have recently sent a bit patchset to remove most OHCI/EHCI drivers
that could be converted to the generic variants, series starts here:
1349701906-16481-1-git-send-email-florian at openwrt.org

in this patchset I added a new property to the EHCI platform data:
need_io_watchdog, which needs to be handled too from DT ideally.

Actually the new property is "no_io_watchdog".  See

	http://marc.info/?l=linux-usb&m=134970247511140&w=2

quoted

Adding device tree bindings is on my TODO after having a generic way
to pass clocks to the ehci/ohci platform drivers, so you are right on time :)

At some point we'll need a way to handle the power_{on,off,suspend} 
callbacks.  I don't know how that should be done.

Alan Stern

I actually included a comment in the patch regarding the missing
functions:

+                * No platform data is being passed, so initalize
pdata.
+                * Limitation: we can't support power_on, power_off or
+                * power_suspend function pointers from DT.
+                * TODO: The missing functions could be replaced with
+                * power sequence handlers.
+                */

I don't know anything about the power sequence code, but have seen some
patches for pwm backlight using it. I don't know if it would allow
everything that's needed, but it seems to have support for voltage
regulators and gpios (among other things).

Regards
Tony P