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* Technologic Systems I2C-FPGA's GPIO controller bindings
This bindings describes the GPIO controller for Technologic's FPGA core.
TS-4900's FPGA encodes the GPIO state on 3 bits, whereas the TS-7970's FPGA
uses 2 bits: it doesn't use a dedicated input bit.
Required properties:
- compatible: Should be one of the following
"technologic,ts4900-gpio"
"technologic,ts7970-gpio"
- reg: Physical base address of the controller and length
of memory mapped region.
- #gpio-cells: Should be two. The first cell is the pin number.
- gpio-controller: Marks the device node as a gpio controller.
Optional property:
- ngpios: Number of GPIOs this controller is instantiated with,
the default is 32. See gpio.txt for more details.
Example:
&i2c2 {
gpio8: gpio@28 {
compatible = "technologic,ts4900-gpio";
reg = <0x28>;
#gpio-cells = <2>;
gpio-controller;
ngpios = <32>;
};
};
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