device-tree-bindings/gpio/gpio-pcf857x.txt

1 * PCF857x-compatible I/O expanders
3 The PCF857x-compatible chips have "quasi-bidirectional" I/O lines that can be
4 driven high by a pull-up current source or driven low to ground. This combines
14   - compatible: should be one of the following.
15     - "maxim,max7328": For the Maxim MAX7378
16     - "maxim,max7329": For the Maxim MAX7329
17     - "nxp,pca8574": For the NXP PCA8574
18     - "nxp,pca8575": For the NXP PCA8575
19     - "nxp,pca9670": For the NXP PCA9670
20     - "nxp,pca9671": For the NXP PCA9671
21     - "nxp,pca9672": For the NXP PCA9672
22     - "nxp,pca9673": For the NXP PCA9673
23     - "nxp,pca9674": For the NXP PCA9674
24     - "nxp,pca9675": For the NXP PCA9675
25     - "nxp,pcf8574": For the NXP PCF8574
26     - "nxp,pcf8574a": For the NXP PCF8574A
27     - "nxp,pcf8575": For the NXP PCF8575
28     - "ti,tca9554": For the TI TCA9554
30   - reg: I2C slave address.
32   - gpio-controller: Marks the device node as a gpio controller.
33   - #gpio-cells: Should be 2. The first cell is the GPIO number and the second
34     cell specifies GPIO flags, as defined in <dt-bindings/gpio/gpio.h>. Only the
39   - lines-initial-states: Bitmask that specifies the initial state of each
41   the input (pulled-up) state. When the  bit is set to one, the line will be
42   initialized the low-level output state. If the property is not specified
49   Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.
51   - interrupt-controller: Identifies the node as an interrupt controller.
52   - #interrupt-cells: Number of cells to encode an interrupt source, shall be 2.
53   - interrupt-parent: phandle of the parent interrupt controller.
54   - interrupts: Interrupt specifier for the controllers interrupt.
63 		compatible = "nxp,pcf8575";
65 		interrupt-parent = <&irqpin2>;
67 		gpio-controller;
68 		#gpio-cells = <2>;
69 		interrupt-controller;
70 		#interrupt-cells = <2>;