94 lines
2.4 KiB
Plaintext
94 lines
2.4 KiB
Plaintext
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* Atmel PIO4 Controller
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The Atmel PIO4 controller is used to select the function of a pin and to
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configure it.
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Required properties:
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- compatible: "atmel,sama5d2-pinctrl".
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- reg: base address and length of the PIO controller.
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- interrupts: interrupt outputs from the controller, one for each bank.
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- interrupt-controller: mark the device node as an interrupt controller.
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- #interrupt-cells: should be two.
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- gpio-controller: mark the device node as a gpio controller.
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- #gpio-cells: should be two.
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Please refer to ../gpio/gpio.txt and ../interrupt-controller/interrupts.txt for
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a general description of GPIO and interrupt bindings.
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Please refer to pinctrl-bindings.txt in this directory for details of the
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common pinctrl bindings used by client devices.
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Subnode format
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Each node (or subnode) will list the pins it needs and how to configured these
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pins.
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node {
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pinmux = <PIN_NUMBER_PINMUX>;
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GENERIC_PINCONFIG;
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};
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Required properties:
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- pinmux: integer array. Each integer represents a pin number plus mux and
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ioset settings. Use the macros from boot/dts/<soc>-pinfunc.h file to get the
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right representation of the pin.
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Optional properties:
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- GENERIC_PINCONFIG: generic pinconfig options to use, bias-disable,
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bias-pull-down, bias-pull-up, drive-open-drain, input-schmitt-enable,
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input-debounce, output-low, output-high.
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- atmel,drive-strength: 0 or 1 for low drive, 2 for medium drive and 3 for
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high drive. The default value is low drive.
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Example:
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#include <sama5d2-pinfunc.h>
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...
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{
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pioA: pinctrl@fc038000 {
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compatible = "atmel,sama5d2-pinctrl";
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reg = <0xfc038000 0x600>;
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interrupts = <18 IRQ_TYPE_LEVEL_HIGH 7>,
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<68 IRQ_TYPE_LEVEL_HIGH 7>,
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<69 IRQ_TYPE_LEVEL_HIGH 7>,
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<70 IRQ_TYPE_LEVEL_HIGH 7>;
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interrupt-controller;
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#interrupt-cells = <2>;
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gpio-controller;
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#gpio-cells = <2>;
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clocks = <&pioA_clk>;
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pinctrl_i2c0_default: i2c0_default {
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pinmux = <PIN_PD21__TWD0>,
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<PIN_PD22__TWCK0>;
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bias-disable;
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};
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pinctrl_led_gpio_default: led_gpio_default {
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pinmux = <PIN_PB0>,
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<PIN_PB5>;
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bias-pull-up;
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atmel,drive-strength = <ATMEL_PIO_DRVSTR_ME>;
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};
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pinctrl_sdmmc1_default: sdmmc1_default {
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cmd_data {
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pinmux = <PIN_PA28__SDMMC1_CMD>,
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<PIN_PA18__SDMMC1_DAT0>,
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<PIN_PA19__SDMMC1_DAT1>,
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<PIN_PA20__SDMMC1_DAT2>,
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<PIN_PA21__SDMMC1_DAT3>;
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bias-pull-up;
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};
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ck_cd {
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pinmux = <PIN_PA22__SDMMC1_CK>,
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<PIN_PA30__SDMMC1_CD>;
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bias-disable;
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};
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};
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...
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};
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};
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...
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