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6906a4f9d1
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>
84 lines
1.8 KiB
Plaintext
84 lines
1.8 KiB
Plaintext
* NXP PCA953x I2C GPIO multiplexer
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Required properties:
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- compatible: Has to contain one of the following:
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nxp,pca9505
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nxp,pca9534
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nxp,pca9535
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nxp,pca9536
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nxp,pca9537
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nxp,pca9538
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nxp,pca9539
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nxp,pca9554
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nxp,pca9555
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nxp,pca9556
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nxp,pca9557
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nxp,pca9574
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nxp,pca9575
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nxp,pca9698
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nxp,pcal6524
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nxp,pcal9555a
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maxim,max7310
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maxim,max7312
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maxim,max7313
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maxim,max7315
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ti,pca6107
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ti,pca9536
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ti,tca6408
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ti,tca6416
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ti,tca6424
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ti,tca9539
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ti,tca9554
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onnn,pca9654
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exar,xra1202
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- gpio-controller: if used as gpio expander.
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- #gpio-cells: if used as gpio expander.
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- interrupt-controller: if to be used as interrupt expander.
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- #interrupt-cells: if to be used as interrupt expander.
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Optional properties:
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- reset-gpios: GPIO specification for the RESET input. This is an
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active low signal to the PCA953x.
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- vcc-supply: power supply regulator.
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Example:
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gpio@20 {
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compatible = "nxp,pca9505";
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reg = <0x20>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_pca9505>;
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interrupt-parent = <&gpio3>;
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interrupts = <23 IRQ_TYPE_LEVEL_LOW>;
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};
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Example with Interrupts:
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gpio99: gpio@22 {
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compatible = "nxp,pcal6524";
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reg = <0x22>;
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interrupt-parent = <&gpio6>;
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interrupts = <1 IRQ_TYPE_EDGE_FALLING>; /* gpio6_161 */
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interrupt-controller;
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#interrupt-cells = <2>;
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vcc-supply = <&vdds_1v8_main>;
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gpio-controller;
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#gpio-cells = <2>;
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gpio-line-names =
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"hdmi-ct-hpd", "hdmi.ls-oe", "p02", "p03", "vibra", "fault2", "p06", "p07",
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"en-usb", "en-host1", "en-host2", "chg-int", "p14", "p15", "mic-int", "en-modem",
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"shdn-hs-amp", "chg-status+red", "green", "blue", "en-esata", "fault1", "p26", "p27";
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};
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ts3a227@3b {
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compatible = "ti,ts3a227e";
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reg = <0x3b>;
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interrupt-parent = <&gpio99>;
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interrupts = <14 IRQ_TYPE_EDGE_RISING>;
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ti,micbias = <0>; /* 2.1V */
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};
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