diff options
| author |   H. Nikolaus Schaller <hns@goldelico.com> | 2018-04-28 18:31:37 +0200 |
|---|---|---|
| committer |   Linus Walleij <linus.walleij@linaro.org> | 2018-05-16 14:35:24 +0200 |
| commit | 6906a4f9d10b27853e80998afcfb290d8f91c071 (patch) | |
| tree | 5e96d20c6df325bc3fc9ae7b263f7389051b7c6a /Documentation/devicetree/bindings/gpio | |
| parent | DTS: Bindings: pca953x add an optional vcc-supply property (diff) | |
| download | linux-dev-6906a4f9d10b27853e80998afcfb290d8f91c071.tar.xz linux-dev-6906a4f9d10b27853e80998afcfb290d8f91c071.zip | |
pca953x: add example how to use interrupt-controller and gpio-controller
It is not completely obvious that these are required and
how to use them. So we provide a tested example.
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Diffstat (limited to 'Documentation/devicetree/bindings/gpio')
| -rw-r--r-- | Documentation/devicetree/bindings/gpio/gpio-pca953x.txt | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt b/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt index 6a7cddb187c1..88f228665507 100644 --- a/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt +++ b/Documentation/devicetree/bindings/gpio/gpio-pca953x.txt @@ -31,6 +31,10 @@ Required properties: ti,tca9554 onnn,pca9654 exar,xra1202 + - 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. Optional properties: - reset-gpios: GPIO specification for the RESET input. This is an @@ -48,3 +52,32 @@ Example: interrupt-parent = <&gpio3>; interrupts = <23 IRQ_TYPE_LEVEL_LOW>; }; + + +Example with Interrupts: + + + gpio99: 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 */ + }; + |