1AXP209 GPIO & pinctrl controller
2
3This driver follows the usual GPIO bindings found in
4Documentation/devicetree/bindings/gpio/gpio.txt
5
6This driver follows the usual pinctrl bindings found in
7Documentation/devicetree/bindings/pinctrl/pinctrl-bindings.txt
8
9This driver employs the per-pin muxing pattern.
10
11Required properties:
12- compatible: Should be one of:
13	- "x-powers,axp209-gpio"
14	- "x-powers,axp813-gpio"
15- #gpio-cells: Should be two. The first cell is the pin number and the
16  second is the GPIO flags.
17- gpio-controller: Marks the device node as a GPIO controller.
18
19This node must be a subnode of the axp20x PMIC, documented in
20Documentation/devicetree/bindings/mfd/axp20x.txt
21
22Example:
23
24axp209: pmic@34 {
25	compatible = "x-powers,axp209";
26	reg = <0x34>;
27	interrupt-parent = <&nmi_intc>;
28	interrupts = <0 IRQ_TYPE_LEVEL_LOW>;
29	interrupt-controller;
30	#interrupt-cells = <1>;
31
32	axp_gpio: gpio {
33		compatible = "x-powers,axp209-gpio";
34		gpio-controller;
35		#gpio-cells = <2>;
36	};
37};
38
39The GPIOs can be muxed to other functions and therefore, must be a subnode of
40axp_gpio.
41
42Example:
43
44&axp_gpio {
45	gpio0_adc: gpio0-adc {
46		pins = "GPIO0";
47		function = "adc";
48	};
49};
50
51&example_node {
52	pinctrl-names = "default";
53	pinctrl-0 = <&gpio0_adc>;
54};
55
56GPIOs and their functions
57-------------------------
58
59Each GPIO is independent from the other (i.e. GPIO0 in gpio_in function does
60not force GPIO1 and GPIO2 to be in gpio_in function as well).
61
62axp209
63------
64GPIO	|	Functions
65------------------------
66GPIO0	|	gpio_in, gpio_out, ldo, adc
67GPIO1	|	gpio_in, gpio_out, ldo, adc
68GPIO2	|	gpio_in, gpio_out
69
70axp813
71------
72GPIO	|	Functions
73------------------------
74GPIO0	|	gpio_in, gpio_out, ldo, adc
75GPIO1	|	gpio_in, gpio_out, ldo
76