Commit ae18e254 authored by Akhila YS's avatar Akhila YS Committed by Claudiu Beznea
Browse files

dt-bindings: arm: atmel,at91rm9200-st: convert to DT schema 



Convert System Timer binding to YAML format.
Changes during conversion:
- Add "#address-cells" and "#size-cells" to the properties and required as
  watchdog is defined as a child node to the timer parent node.
- Define watchdog as a pattern property along with unit address in
  examples.

Acked-by: default avatarConor Dooley <conor.dooley@microchip.com>
Signed-off-by: default avatarAkhila YS <akhilayalmati@gmail.com>
Link: https://lore.kernel.org/r/20260227-arm-microchip-v4-4-7e2ae1c5b5d6@gmail.com


Signed-off-by: default avatarClaudiu Beznea <claudiu.beznea@tuxon.dev>
parent 67f386b2

Documentation/devicetree/bindings/arm/atmel,at91rm9200-st.yaml

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

%YAML 1.2

---

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

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



title: Atmel System Timer



maintainers:

  - Nicolas Ferre <nicolas.ferre@microchip.com>

  - Claudiu Beznea <claudiu.beznea@tuxon.dev>



description:

  The System Timer (ST) module in AT91RM9200 provides periodic tick and

  alarm capabilities. It is exposed as a simple multi-function device

  (simple-mfd + syscon) because it shares its register space and interrupt

  with other System Controller blocks.



properties:

  compatible:

    items:

      - const: atmel,at91rm9200-st

      - const: syscon

      - const: simple-mfd



  reg:

    maxItems: 1



  interrupts:

    maxItems: 1



  clocks:

    maxItems: 1



  "#address-cells":

    const: 1



  "#size-cells":

    const: 1



patternProperties:

  "^watchdog@[0-9a-f]+$":

    $ref: /schemas/watchdog/atmel,at91rm9200-wdt.yaml#



required:

  - compatible

  - reg

  - interrupts

  - clocks



unevaluatedProperties: false



examples:

  - |

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

    timer@fffffd00 {

        compatible = "atmel,at91rm9200-st", "syscon", "simple-mfd";

        reg = <0xfffffd00 0x100>;

        interrupts = <1 IRQ_TYPE_LEVEL_HIGH 7>;

        clocks = <&slow_xtal>;

        #address-cells = <1>;

        #size-cells = <1>;



        watchdog@fffffd40 {

            compatible = "atmel,at91rm9200-wdt";

            reg = <0xfffffd40 0x40>;

        };

    };

...

Documentation/devicetree/bindings/arm/atmel-sysregs.txt

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Atmel system registers



System Timer (ST) required properties:

- compatible: Should be "atmel,at91rm9200-st", "syscon", "simple-mfd"

- reg: Should contain registers location and length

- interrupts: Should contain interrupt for the ST which is the IRQ line

  shared across all System Controller members.

- clocks: phandle to input clock.

Its subnodes can be:

- watchdog: compatible should be "atmel,at91rm9200-wdt"



RAMC SDRAM/DDR Controller required properties:

- compatible: Should be "atmel,at91rm9200-sdramc", "syscon" or

			"atmel,at91sam9260-sdramc" or