42 lines
1.1 KiB
Plaintext
42 lines
1.1 KiB
Plaintext
SEMTECH SX150x GPIO expander bindings
|
|
|
|
|
|
Required properties:
|
|
|
|
- compatible: should be "semtech,sx1506q",
|
|
"semtech,sx1508q",
|
|
"semtech,sx1509q",
|
|
"semtech,sx1502q".
|
|
|
|
- reg: The I2C slave address for this device.
|
|
|
|
- interrupt-parent: phandle of the parent interrupt controller.
|
|
|
|
- interrupts: Interrupt specifier for the controllers interrupt.
|
|
|
|
- #gpio-cells: Should be 2. The first cell is the GPIO number and the
|
|
second cell is used to specify optional parameters:
|
|
bit 0: polarity (0: normal, 1: inverted)
|
|
|
|
- gpio-controller: Marks the device as a GPIO controller.
|
|
|
|
- interrupt-controller: Marks the device as a interrupt controller.
|
|
|
|
The GPIO expander can optionally be used as an interrupt controller, in
|
|
which case it uses the default two cell specifier as described in
|
|
Documentation/devicetree/bindings/interrupt-controller/interrupts.txt.
|
|
|
|
Example:
|
|
|
|
i2c_gpio_expander@20{
|
|
#gpio-cells = <2>;
|
|
#interrupt-cells = <2>;
|
|
compatible = "semtech,sx1506q";
|
|
reg = <0x20>;
|
|
interrupt-parent = <&gpio_1>;
|
|
interrupts = <16 0>;
|
|
|
|
gpio-controller;
|
|
interrupt-controller;
|
|
};
|