On Wed, Apr 04, 2018 at 09:00:24PM +0200, H. Nikolaus Schaller wrote:
> It is not completely obvious that these are required as
> some .dts files don't specify them.
>
> Signed-off-by: H. Nikolaus Schaller <hns@xxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/gpio/gpio-pca953x.txt | 33 ++++++++++++++++++++++
> 1 file changed, 33 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt b/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt
> index 6a7cddb187c1..7f3b50a6d681 100644
> --- a/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt
> +++ b/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt
> @@ -36,6 +36,10 @@ Optional properties:
> - reset-gpios: GPIO specification for the RESET input. This is an
> active low signal to the PCA953x.
> - vcc-supply: power supply regulator.
> + - gpio-controller: if used as gpio expander.
> + - #gpio-cells: if used as gpio expander.
> + - interrupt-controller: if to be used as interrupt expander.
> + - #interrupt-cells: if to be used as interrupt expander.
These should be required. It's a mistake if dts files don't have them.
>
> Example:
>
> @@ -48,3 +52,32 @@ Example:
> interrupt-parent = <&gpio3>;
> interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
> };
> +
> +
> +Example with Interrupts:
> +
> +
> + gpio99: tca6424@22 {
gpio@22
> + compatible = "nxp,pcal6524";
> + reg = <0x22>;
> + interrupt-parent = <&gpio6>;
> + interrupts = <1 IRQ_TYPE_EDGE_FALLING>; /* gpio6_161 */
> + interrupt-controller;
> + #interrupt-cells = <2>;
> + vcc-supply = <&vdds_1v8_main>;
> + gpio-controller;
> + #gpio-cells = <2>;
> + gpio-line-names =
> + "hdmi-ct-hpd", "hdmi.ls-oe", "p02", "p03", "vibra", "fault2", "p06", "p07",
> + "en-usb", "en-host1", "en-host2", "chg-int", "p14", "p15", "mic-int", "en-modem",
> + "shdn-hs-amp", "chg-status+red", "green", "blue", "en-esata", "fault1", "p26", "p27";
> + };
> +
> + ts3a227@3b {
> + compatible = "ti,ts3a227e";
> + reg = <0x3b>;
> + interrupt-parent = <&gpio99>;
> + interrupts = <14 IRQ_TYPE_EDGE_RISING>;
> + ti,micbias = <0>; /* 2.1V */
> + };
> +
> --
> 2.12.2
>
--
To unsubscribe from this list: send the line "unsubscribe devicetree" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
