device-tree-bindings/gpio/snps%2Ccreg-gpio.txt

1 GPIO via CREG (control registers) driver
5 [     not used     | gpio-1 | gpio-0 | <-shift-> ]   < 32 bit register
12 - compatible : "snps,creg-gpio"
14 - #gpio-cells : Should be one - the pin number.
15 - gpio-controller : Marks the device node as a GPIO controller.
16 - gpio-count: Number of GPIO pins.
17 - gpio-bit-per-line: Number of bits per gpio line (see picture).
18 - gpio-first-shift: Shift (in bits) of the first GPIO field in register
20 - gpio-activate-val: Value should be set in corresponding field to set
21   output to "1" (see picture). Applied to all GPIO ports.
22 - gpio-deactivate-val: Value should be set in corresponding field to set
23   output to "0" (see picture). Applied to all GPIO ports.
26 - gpio-bank-name: name of bank (as default driver name is used is used)
27 - gpio-default-val: array of default output values (must me 0 or 1)
31 gpio: gpio@f00014b0 {
32 	compatible = "snps,creg-gpio";
34 	gpio-controller;
35 	#gpio-cells = <1>;
36 	gpio-bank-name = "hsdk-spi-cs";
37 	gpio-count = <2>;
38 	gpio-first-shift = <5>;
39 	gpio-bit-per-line = <2>;
40 	gpio-activate-val = <2>;
41 	gpio-deactivate-val = <3>;
42 	gpio-default-val = <1 1>;