On Thu, Nov 3, 2011 at 5:12 PM, Robert Sciuk <robert.sc...@exfo.com> wrote:
> lim_r: gpio@e8 {
> compatible = "nxp,pca9539";
> reg = <0xe8>;
> #gpio-cells = <2>;
> gpio-controller;
> polarity = <0x00>;
> };
>
> lim_w: gpio@e9 {
> compatible = "nxp,pca9539";
> reg = <0xe9>;
> #gpio-cells = <2>;
> gpio-controller;
> polarity = <0x00>;
> };
>
> };
>
> It appears that I'm not correctly creating the pca9539 nodes as of yet (I'll
> be adding the phandles shortly). Any pointers for pca9539 driver nodes would
> be appreciated, as I took these from a similar tree, but not the 95xx driver.
> I'll match them up with the code in the morning ...
I *believe* you are not supposed to create separate nodes for reading
and writing. I know that's how I2C works, but I think the I2C layer
takes care of that for you.
If you look at other device trees, you'll see they only have one node
for any particular I2C device.
--
Timur Tabi
Linux kernel developer at Freescale
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