On 13 November 2012 06:06, Stephen Warren [off-list ref] wrote:

On 11/11/2012 05:50 AM, Jonas Gorski wrote:

quoted

Register the GPIO controller through Device Tree and add the
appropriate values in the include files.

Since we can't register a platform driver at this early stage move the
direct call to bcm63xx_gpio_init from prom_init to an arch initcall.

quoted

diff --git a/Documentation/devicetree/bindings/gpio/bcm63xx-gpio.txt b/Documentation/devicetree/bindings/gpio/bcm63xx-gpio.txt

quoted

+- #gpio-cells: Must be <2>. The first cell is the GPIO pin, and
+  the second one the standard linux flags.

Also here, I think you want to explicitly document the flag values here
so the bindings don't rely on the Linux kernel code. I don't think
there's a standard central file which documents them though, although I
vaguely recall some discussion to create add them to gpio.txt?

I'll add some more description. And yes there isn't, and I can't
comment about that since I just joined devicetree-discuss a few days
ago. It would be nice to have them there. Maybe I'll add a reference
to gpio.txt and see if I can come up with an acceptable description
for the flags.


Jonas