dt-bindings: mmc: convert bcm2835-sdhost bindings to YAML

Broadcom BCM2835 SDHOST controller

This file documents differences between the core properties described

by mmc.txt and the properties that represent the BCM2835 controller.

Required properties:

- compatible: Should be "brcm,bcm2835-sdhost".

- clocks: The clock feeding the SDHOST controller.

Optional properties:

- dmas: DMA channel for read and write.

          See Documentation/devicetree/bindings/dma/dma.txt for details

Example:

sdhost: mmc@7e202000 {

	compatible = "brcm,bcm2835-sdhost";

	reg = <0x7e202000 0x100>;

	interrupts = <2 24>;

	clocks = <&clocks BCM2835_CLOCK_VPU>;

	dmas = <&dma 13>;

	dma-names = "rx-tx";

};

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

%YAML 1.2

---

$id: http://devicetree.org/schemas/mmc/brcm,bcm2835-sdhost.yaml#

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

title: Broadcom BCM2835 SDHOST controller

maintainers:

  - Stefan Wahren <stefan.wahren@i2se.com>

allOf:

  - $ref: mmc-controller.yaml

properties:

  compatible:

    const: brcm,bcm2835-sdhost

  reg:

    maxItems: 1

  interrupts:

    maxItems: 1

  clocks:

    maxItems: 1

  dmas:

    maxItems: 1

  dma-names:

    const: rx-tx

required:

  - compatible

  - reg

  - interrupts

  - clocks

unevaluatedProperties: false

examples:

  - |

    #include <dt-bindings/clock/bcm2835.h>

    sdhost: mmc@7e202000 {

      compatible = "brcm,bcm2835-sdhost";

      reg = <0x7e202000 0x100>;

      interrupts = <2 24>;

      clocks = <&clocks BCM2835_CLOCK_VPU>;

      dmas = <&dma 13>;

      dma-names = "rx-tx";

      bus-width = <4>;

    };