It is not completely obvious that these are required as
some .dts files don't specify them.
Signed-off-by: H. Nikolaus Schaller <h...@goldelico.com>
---
.../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.
Example:
@@ -48,3 +52,32 @@ Example:
interrupt-parent = <&gpio3>;
interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
};
+
+
+Example with Interrupts:
+
+
+ gpio99: tca6424@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
