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torvalds
GitHub Repository: torvalds/linux
 Path: blob/master/Documentation/devicetree/bindings/arm/bcm/raspberrypi,bcm2835-firmware.yaml
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# SPDX-License-Identifier: GPL-2.0

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%YAML 1.2

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---

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$id: http://devicetree.org/schemas/arm/bcm/raspberrypi,bcm2835-firmware.yaml#

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

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title: Raspberry Pi VideoCore firmware driver

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maintainers:

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  - Eric Anholt <eric@anholt.net>

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  - Stefan Wahren <wahrenst@gmx.net>

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select:

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  properties:

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    compatible:

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      contains:

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        const: raspberrypi,bcm2835-firmware

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  required:

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    - compatible

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properties:

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  compatible:

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    items:

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      - const: raspberrypi,bcm2835-firmware

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      - const: simple-mfd

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  mboxes:

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    maxItems: 1

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  clocks:

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    type: object

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    additionalProperties: false

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    properties:

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      compatible:

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        const: raspberrypi,firmware-clocks

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      "#clock-cells":

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        const: 1

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        description: >

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          The argument is the ID of the clocks contained by the

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          firmware messages.

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    required:

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      - compatible

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      - "#clock-cells"

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  gpio:

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    type: object

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    additionalProperties: false

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    properties:

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      compatible:

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        const: raspberrypi,firmware-gpio

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      gpio-controller: true

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      "#gpio-cells":

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        const: 2

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        description:

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          The first cell is the pin number, and the second cell is used to

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          specify the gpio polarity (GPIO_ACTIVE_HIGH or GPIO_ACTIVE_LOW).

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      gpio-line-names:

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        minItems: 8

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    required:

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      - compatible

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      - gpio-controller

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      - "#gpio-cells"

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  reset:

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    type: object

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    additionalProperties: false

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    properties:

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      compatible:

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        const: raspberrypi,firmware-reset

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      "#reset-cells":

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        const: 1

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        description: >

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          The argument is the ID of the firmware reset line to affect.

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    required:

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      - compatible

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      - "#reset-cells"

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  pwm:

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    type: object

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    additionalProperties: false

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    properties:

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      compatible:

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        const: raspberrypi,firmware-poe-pwm

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      "#pwm-cells":

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        # See pwm.yaml in this directory for a description of the cells format.

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        const: 2

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    required:

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      - compatible

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      - "#pwm-cells"

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required:

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  - compatible

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  - mboxes

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additionalProperties: false

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examples:

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  - |

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    firmware {

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        compatible = "raspberrypi,bcm2835-firmware", "simple-mfd";

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        mboxes = <&mailbox>;

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        firmware_clocks: clocks {

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            compatible = "raspberrypi,firmware-clocks";

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            #clock-cells = <1>;

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        };

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        expgpio: gpio {

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            compatible = "raspberrypi,firmware-gpio";

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            gpio-controller;

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            #gpio-cells = <2>;

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        };

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        reset: reset {

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            compatible = "raspberrypi,firmware-reset";

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            #reset-cells = <1>;

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        };

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        pwm: pwm {

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            compatible = "raspberrypi,firmware-poe-pwm";

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            #pwm-cells = <2>;

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        };

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    };

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...

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