Commit 97ef3551 authored by Andre Przywara's avatar Andre Przywara Committed by Rob Herring
Browse files

dt-bindings: serio: add Arm PL050 DT schema 

The Arm PL050 "Keyboard/Mouse Interface" is an Arm system IP providing a
PS/2 compatible serial interface.

Add a simple DT schema binding, based on the TRM[1], the existing DTs and
the Linux driver.

[1] https://developer.arm.com/documentation/ddi0143/latest



Signed-off-by: default avatarAndre Przywara <andre.przywara@arm.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: default avatarRob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20220506140533.3566431-6-andre.przywara@arm.com
parent b8559347

Documentation/devicetree/bindings/serio/arm,pl050.yaml

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/serio/arm,pl050.yaml#

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



title: Arm Ltd. PrimeCell PL050 PS/2 Keyboard/Mouse Interface



maintainers:

  - Andre Przywara <andre.przywara@arm.com>



description:

  The Arm PrimeCell PS2 Keyboard/Mouse Interface (KMI) is an AMBA compliant

  peripheral that can be used to implement a keyboard or mouse interface that

  is IBM PS2 or AT compatible.



# We need a select here so we don't match all nodes with 'arm,primecell'

select:

  properties:

    compatible:

      contains:

        const: arm,pl050

  required:

    - compatible



properties:

  compatible:

    items:

      - const: arm,pl050

      - const: arm,primecell



  reg:

    maxItems: 1



  interrupts:

    maxItems: 1



  clocks:

    items:

      - description: KMI reference clock, used to generate the bus timing

      - description: APB register access clock



  clock-names:

    items:

      - const: KMIREFCLK

      - const: apb_pclk



required:

  - compatible

  - reg

  - interrupts

  - clocks

  - clock-names



additionalProperties: false



examples:

  - |

    serio@70000 {

        compatible = "arm,pl050", "arm,primecell";

        reg = <0x070000 0x1000>;

        interrupts = <8>;

        clocks = <&mb_clk24mhz>, <&soc_smc50mhz>;

        clock-names = "KMIREFCLK", "apb_pclk";

    };



...