summaryrefslogtreecommitdiffstats
path: root/dts/Bindings/gpio/brcm,bcm6345-gpio.txt
blob: e7853143fa42787a8b39c1c98ab3381b81cf0b4c (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
Bindings for the Broadcom's brcm,bcm6345-gpio memory-mapped GPIO controllers.

These bindings can be used on any BCM63xx SoC. However, BCM6338 and BCM6345
are the only ones which don't need a pinctrl driver.
BCM6338 have 8-bit data and dirout registers, where GPIO state can be read
and/or written, and the direction changed from input to output.
BCM6345 have 16-bit data and dirout registers, where GPIO state can be read
and/or written, and the direction changed from input to output.

Required properties:
	- compatible: should be "brcm,bcm6345-gpio"
	- reg-names: must contain
		"dat" - data register
		"dirout" - direction (output) register
	- reg: address + size pairs describing the GPIO register sets;
		order must correspond with the order of entries in reg-names
	- #gpio-cells: must be set to 2. The first cell is the pin number and
			the second cell is used to specify the gpio polarity:
			0 = active high
			1 = active low
	- gpio-controller: Marks the device node as a gpio controller.

Optional properties:
	- native-endian: use native endian memory.

Examples:
	- BCM6338:
	gpio: gpio-controller@fffe0407 {
		compatible = "brcm,bcm6345-gpio";
		reg-names = "dirout", "dat";
		reg = <0xfffe0407 1>, <0xfffe040f 1>;

		#gpio-cells = <2>;
		gpio-controller;
	};

	- BCM6345:
	gpio: gpio-controller@fffe0406 {
		compatible = "brcm,bcm6345-gpio";
		reg-names = "dirout", "dat";
		reg = <0xfffe0406 2>, <0xfffe040a 2>;
		native-endian;

		#gpio-cells = <2>;
		gpio-controller;
	};