Commit 256a3f24 authored by Wenyou Yang's avatar Wenyou Yang Committed by Andreas Bießmann

atmel: Bring in at91 pio4 device tree file and bindings

Bring in required device tree file and bindings from Linux.
Signed-off-by: default avatarWenyou Yang <wenyou.yang@atmel.com>
Reviewed-by: default avatarAndreas Bießmann <andreas@biessmann.org>
Reviewed-by: default avatarSimon Glass <sjg@chromium.org>
parent ac72e174
This diff is collapsed.
* Atmel PIO4 Controller
The Atmel PIO4 controller is used to select the function of a pin and to
configure it.
Required properties:
- compatible: "atmel,sama5d2-pinctrl".
- reg: base address and length of the PIO controller.
Please refer to pinctrl-bindings.txt in this directory for details of the
common pinctrl bindings used by client devices.
Subnode format
Each node (or subnode) will list the pins it needs and how to configured these
pins.
node {
pinmux = <PIN_NUMBER_PINMUX>;
GENERIC_PINCONFIG;
};
Required properties:
- pinmux: integer array. Each integer represents a pin number plus mux and
ioset settings. Use the macros from boot/dts/<soc>-pinfunc.h file to get the
right representation of the pin.
Optional properties:
- GENERIC_PINCONFIG: generic pinconfig options to use, bias-disable,
bias-pull-down, bias-pull-up, drive-open-drain, input-schmitt-enable,
input-debounce.
Example:
#include <sama5d2-pinfunc.h>
...
{
spi0: spi@f8000000 {
cs-gpios = <&pioA 17 0>, <0>, <0>, <0>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_spi0_default>;
status = "okay";
spi_flash@0 {
compatible = "spi-flash";
reg = <0>;
spi-max-frequency = <50000000>;
};
};
...
pioA: pinctrl@fc038000 {
compatible = "atmel,sama5d2-pinctrl";
reg = <0xfc038000 0x600>;
pinctrl_spi0_default: spi0_default {
pinmux = <PIN_PA14__SPI0_SPCK>,
<PIN_PA15__SPI0_MOSI>,
<PIN_PA16__SPI0_MISO>;
bias-disable;
};
...
};
};
...
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