Commit 5b05198b authored by Sergiu Moga's avatar Sergiu Moga Committed by Alexandre Belloni
Browse files

dt-bindings: rtc: convert at91sam9 bindings to json-schema 



Convert RTC binding for Atmel/Microchip SoCs to Device Tree Schema
format.

Signed-off-by: default avatarSergiu Moga <sergiu.moga@microchip.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@canonical.com>
Reviewed-by: default avatarRob Herring <robh@kernel.org>
Signed-off-by: default avatarAlexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20220304161159.147784-4-sergiu.moga@microchip.com
parent 73ce0530

Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.txt

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Atmel AT91SAM9260 Real Time Timer



Required properties:

- compatible: should be one of the following:

	- "atmel,at91sam9260-rtt"

	- "microchip,sam9x60-rtt", "atmel,at91sam9260-rtt"

- reg: should encode the memory region of the RTT controller

- interrupts: rtt alarm/event interrupt

- clocks: should contain the 32 KHz slow clk that will drive the RTT block.

- atmel,rtt-rtc-time-reg: should encode the GPBR register used to store

	the time base when the RTT is used as an RTC.

	The first cell should point to the GPBR node and the second one

	encode the offset within the GPBR block (or in other words, the

	GPBR register used to store the time base).





Example:



rtt@fffffd20 {

	compatible = "atmel,at91sam9260-rtt";

	reg = <0xfffffd20 0x10>;

	interrupts = <1 4 7>;

	clocks = <&clk32k>;

	atmel,rtt-rtc-time-reg = <&gpbr 0x0>;

};

Documentation/devicetree/bindings/rtc/atmel,at91sam9-rtc.yaml

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

# Copyright (C) 2022 Microchip Technology, Inc. and its subsidiaries

%YAML 1.2

---

$id: http://devicetree.org/schemas/rtc/atmel,at91sam9-rtc.yaml#

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



title: Atmel AT91 RTT Device Tree Bindings



allOf:

  - $ref: "rtc.yaml#"



maintainers:

  - Alexandre Belloni <alexandre.belloni@bootlin.com>



properties:

  compatible:

    oneOf:

      - items:

          - const: atmel,at91sam9260-rtt

      - items:

          - const: microchip,sam9x60-rtt

          - const: atmel,at91sam9260-rtt



  reg:

    maxItems: 1



  interrupts:

    maxItems: 1



  clocks:

    maxItems: 1



  atmel,rtt-rtc-time-reg:

    $ref: /schemas/types.yaml#/definitions/phandle-array

    items:

      - items:

          - description: Phandle to the GPBR node.

          - description: Offset within the GPBR block.

    description:

      Should encode the GPBR register used to store the time base when the

      RTT is used as an RTC. The first cell should point to the GPBR node

      and the second one encodes the offset within the GPBR block (or in

      other words, the GPBR register used to store the time base).



required:

  - compatible

  - reg

  - interrupts

  - clocks

  - atmel,rtt-rtc-time-reg



unevaluatedProperties: false



examples:

  - |

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



    rtc@fffffd20 {

        compatible = "atmel,at91sam9260-rtt";

        reg = <0xfffffd20 0x10>;

        interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;

        clocks = <&clk32k>;

        atmel,rtt-rtc-time-reg = <&gpbr 0x0>;

    };