xref: /freebsd/sys/contrib/device-tree/Bindings/pinctrl/atmel,at91-pio4-pinctrl.txt (revision 7fdf597e96a02165cfe22ff357b857d5fa15ed8a)
1* Atmel PIO4 Controller
2
3The Atmel PIO4 controller is used to select the function of a pin and to
4configure it.
5
6Required properties:
7- compatible:
8	"atmel,sama5d2-pinctrl"
9	"microchip,sama7g5-pinctrl"
10- reg: base address and length of the PIO controller.
11- interrupts: interrupt outputs from the controller, one for each bank.
12- interrupt-controller: mark the device node as an interrupt controller.
13- #interrupt-cells: should be two.
14- gpio-controller: mark the device node as a gpio controller.
15- #gpio-cells: should be two.
16
17Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for
18a general description of GPIO and interrupt bindings.
19
20Please refer to pinctrl-bindings.txt in this directory for details of the
21common pinctrl bindings used by client devices.
22
23Subnode format
24Each node (or subnode) will list the pins it needs and how to configured these
25pins.
26
27	node {
28		pinmux = <PIN_NUMBER_PINMUX>;
29		GENERIC_PINCONFIG;
30	};
31
32Required properties:
33- pinmux: integer array. Each integer represents a pin number plus mux and
34ioset settings. Use the macros from boot/dts/<soc>-pinfunc.h file to get the
35right representation of the pin.
36
37Optional properties:
38- GENERIC_PINCONFIG: generic pinconfig options to use:
39	- bias-disable, bias-pull-down, bias-pull-up, drive-open-drain,
40	 drive-push-pull input-schmitt-enable, input-debounce, output-low,
41	 output-high.
42	- for microchip,sama7g5-pinctrl only:
43		- slew-rate: 0 - disabled, 1 - enabled (default)
44- atmel,drive-strength: 0 or 1 for low drive, 2 for medium drive and 3 for
45high drive. The default value is low drive.
46
47Example:
48
49#include <sama5d2-pinfunc.h>
50
51...
52{
53	pioA: pinctrl@fc038000 {
54		compatible = "atmel,sama5d2-pinctrl";
55		reg = <0xfc038000 0x600>;
56		interrupts = <18 IRQ_TYPE_LEVEL_HIGH 7>,
57			     <68 IRQ_TYPE_LEVEL_HIGH 7>,
58			     <69 IRQ_TYPE_LEVEL_HIGH 7>,
59			     <70 IRQ_TYPE_LEVEL_HIGH 7>;
60		interrupt-controller;
61		#interrupt-cells = <2>;
62		gpio-controller;
63		#gpio-cells = <2>;
64		clocks = <&pioA_clk>;
65
66		pinctrl_i2c0_default: i2c0_default {
67			pinmux = <PIN_PD21__TWD0>,
68				 <PIN_PD22__TWCK0>;
69			bias-disable;
70		};
71
72		pinctrl_led_gpio_default: led_gpio_default {
73			pinmux = <PIN_PB0>,
74				 <PIN_PB5>;
75			bias-pull-up;
76			atmel,drive-strength = <ATMEL_PIO_DRVSTR_ME>;
77		};
78
79		pinctrl_sdmmc1_default: sdmmc1_default {
80			cmd_data {
81				pinmux = <PIN_PA28__SDMMC1_CMD>,
82					 <PIN_PA18__SDMMC1_DAT0>,
83					 <PIN_PA19__SDMMC1_DAT1>,
84					 <PIN_PA20__SDMMC1_DAT2>,
85					 <PIN_PA21__SDMMC1_DAT3>;
86				bias-pull-up;
87			};
88
89			ck_cd {
90				pinmux = <PIN_PA22__SDMMC1_CK>,
91					 <PIN_PA30__SDMMC1_CD>;
92				bias-disable;
93			};
94		};
95		...
96	};
97};
98...
99