Commit 33704989 authored by Manikandan Muralidharan's avatar Manikandan Muralidharan Committed by Bartosz Golaszewski
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dt-bindings: gpio: convert Atmel GPIO to json-schema 



Convert the Atmel GPIO controller binding document to DT schema format
using json-schema.
The at91 pinctrl driver uses "atmel,at91rm9200-gpio" compatible string
to find the number of active GPIO banks and identify the pinmux nodes.
"atmel,at91sam9x5-gpio" and "microchip,sam9x60-gpio" have additional
registers to handle drive-strength, slew-rate,  pull-down to drive the
pinmux configs.
The new compatible string "microchip,sam9x7-gpio" is added.

Signed-off-by: default avatarManikandan Muralidharan <manikandan.m@microchip.com>
Acked-by: default avatarLinus Walleij <linus.walleij@linaro.org>
Reviewed-by: default avatarConor Dooley <conor.dooley@microchip.com>
Link: https://lore.kernel.org/r/20240709092354.191643-5-manikandan.m@microchip.com


Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@linaro.org>
parent 91581c4b

Documentation/devicetree/bindings/gpio/atmel,at91rm9200-gpio.yaml

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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/gpio/atmel,at91rm9200-gpio.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Microchip GPIO controller (PIO)



maintainers:

  - Manikandan Muralidharan <manikandan.m@microchip.com>



properties:

  compatible:

    oneOf:

      - items:

          - enum:

              - atmel,at91sam9x5-gpio

              - microchip,sam9x60-gpio

          - const: atmel,at91rm9200-gpio

      - items:

          - enum:

              - microchip,sam9x7-gpio

          - const: microchip,sam9x60-gpio

          - const: atmel,at91rm9200-gpio

      - items:

          - const: atmel,at91rm9200-gpio



  reg:

    maxItems: 1



  interrupts:

    maxItems: 1



  interrupt-controller: true



  "#interrupt-cells":

    const: 2



  gpio-controller: true

  gpio-line-names: true



  "#gpio-cells":

    const: 2



  clocks:

    maxItems: 1



  "#gpio-lines":

    description:

      Number of gpio, 32 by default if absent

    maxItems: 1

    default: 32



required:

  - compatible

  - reg

  - interrupts

  - interrupt-controller

  - "#interrupt-cells"

  - gpio-controller

  - "#gpio-cells"

  - clocks



additionalProperties: false



examples:

  - |

    #include <dt-bindings/clock/at91.h>

    #include <dt-bindings/interrupt-controller/irq.h>



    gpio@fffff400 {

            compatible = "atmel,at91rm9200-gpio";

            reg = <0xfffff400 0x200>;

            interrupts = <2 IRQ_TYPE_LEVEL_HIGH 1>;

            #gpio-cells = <2>;

            gpio-controller;

            interrupt-controller;

            #interrupt-cells = <2>;

            clocks = <&pmc PMC_TYPE_PERIPHERAL 2>;

    };

...

Documentation/devicetree/bindings/gpio/gpio_atmel.txt

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* Atmel GPIO controller (PIO)



Required properties:

- compatible: "atmel,<chip>-gpio", where <chip> is at91rm9200 or at91sam9x5.

- reg: Should contain GPIO controller registers location and length

- interrupts: Should be the port interrupt shared by all the pins.

- #gpio-cells: Should be two.  The first cell is the pin number and

  the second cell is used to specify optional parameters to declare if the GPIO

  is active high or low. See gpio.txt.

- gpio-controller: Marks the device node as a GPIO controller.

- interrupt-controller: Marks the device node as an interrupt controller.

- #interrupt-cells: Should be two. The first cell is the pin number and the

  second cell is used to specify irq type flags, see the two cell description

  in interrupt-controller/interrupts.txt for details.



optional properties:

- #gpio-lines: Number of gpio if absent 32.





Example:

	pioA: gpio@fffff200 {

		compatible = "atmel,at91rm9200-gpio";

		reg = <0xfffff200 0x100>;

		interrupts = <2 4>;

		#gpio-cells = <2>;

		gpio-controller;

		#gpio-lines = <19>;

		interrupt-controller;

		#interrupt-cells = <2>;

	};