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67 lines
1.4 KiB
Text
67 lines
1.4 KiB
Text
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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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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.
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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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spi0: spi@f8000000 {
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cs-gpios = <&pioA 17 0>, <0>, <0>, <0>;
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pinctrl-names = "default";
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pinctrl-0 = <&pinctrl_spi0_default>;
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status = "okay";
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spi_flash@0 {
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compatible = "spi-flash";
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reg = <0>;
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spi-max-frequency = <50000000>;
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};
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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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pinctrl_spi0_default: spi0_default {
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pinmux = <PIN_PA14__SPI0_SPCK>,
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<PIN_PA15__SPI0_MOSI>,
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<PIN_PA16__SPI0_MISO>;
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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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