On Mon, 2016-03-21 at 11:48 +0100, Nora Björklund wrote:
> Enable the gpio-expander pca9672 on p2041rdb. The expander
> has been present on the p2041rdb all along, however not in
> the device tree.
>
> Signed-off-by: Nora Björklund <nora.bjorkl...@enea.com>
> ---
> arch/powerpc/boot/dts/fsl/p2041rdb.dts | 7 +++++++
> 1 file changed, 7 insertions(+)
>
> diff --git a/arch/powerpc/boot/dts/fsl/p2041rdb.dts
> b/arch/powerpc/boot/dts/fsl/p2041rdb.dts
> index e9bd894..b1ee561 100644
> --- a/arch/powerpc/boot/dts/fsl/p2041rdb.dts
> +++ b/arch/powerpc/boot/dts/fsl/p2041rdb.dts
> @@ -134,6 +134,13 @@
> };
> };
>
> + i2c@119100 {
> + gpio@22 {
> + compatible = "pcf8575";
> + reg = <0x22>;
> + };
> + };
The compatible should be "nxp,pcf8575" and it needs the gpio-controller and
#gpio-cells properties.
Is there an interrupt line connected to it?
See Documentation/devicetree/bindings/gpio/gpio-pcf857x.txt
-Scott
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