linux-kernel - Re: [PATCH 2/3] dt-bindings: mmc: dw-mshc-hi3798cv200: convert to YAML

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Date: Fri, 16 Feb 2024 09:19:16 +0100
From: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To: forbidden405@...look.com, Ulf Hansson <ulf.hansson@...aro.org>,
 Jaehoon Chung <jh80.chung@...sung.com>, Rob Herring <robh+dt@...nel.org>,
 Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
 Conor Dooley <conor+dt@...nel.org>
Cc: Igor Opaniuk <igor.opaniuk@...aro.org>,
 tianshuliang <tianshuliang@...ilicon.com>, David Yang <mmyangfl@...il.com>,
 linux-kernel@...r.kernel.org, linux-mmc@...r.kernel.org,
 devicetree@...r.kernel.org
Subject: Re: [PATCH 2/3] dt-bindings: mmc: dw-mshc-hi3798cv200: convert to
 YAML

On 15/02/2024 18:46, Yang Xiwen via B4 Relay wrote:
> From: Yang Xiwen <forbidden405@...look.com>
> 
> convert the legacy txt binding to modern YAML. No semantic change.
> 
> Signed-off-by: Yang Xiwen <forbidden405@...look.com>
> ---


> +++ b/Documentation/devicetree/bindings/mmc/hi3798cv200-dw-mshc.yaml

Filename like compatible.

> @@ -0,0 +1,86 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/mmc/hi3798cv200-dw-mshc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title:
> +  Hisilicon Hi3798CV200 SoC specific extensions to the Synopsys DWMMC controller

One line please.

> +
> +maintainers:
> +  - Yang Xiwen <forbidden405@...look.com>
> +
> +description:
> +  The Synopsys designware mobile storage host controller is used to interface
> +  a SoC with storage medium such as eMMC or SD/MMC cards. This file documents
> +  differences between the core Synopsys dw mshc controller properties described
> +  by synopsys-dw-mshc.txt and the properties used by the Hisilicon Hi3798CV200
> +  specific extensions to the Synopsys Designware Mobile Storage Host Controller.
> +
> +allOf:
> +  - $ref: synopsys-dw-mshc-common.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - hisilicon,hi3798cv200-dw-mshc
> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  clocks:
> +    minItems: 4

Drop minItems

> +    maxItems: 4
> +    description: A list of phandles for the clocks listed in clock-names

Drop description

> +
> +  clock-names:
> +    items:
> +      - const: ciu
> +      - const: biu
> +      - const: ciu-sample
> +      - const: ciu-drive
> +    description:
> +      Apart from the clock-names "biu" and "ciu" two more clocks
> +      "ciu-drive" and "ciu-sample" are added. They are used to
> +      control the clock phases, "ciu-sample" is required for tuning
> +      high speed modes.

Description should go to clocks: to individual items.


> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/clock/histb-clock.h>
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    emmc: mmc@...0000 {

Drop label

> +      compatible = "hisilicon,hi3798cv200-dw-mshc";
> +      reg = <0x9830000 0x10000>;
> +      interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
> +      clocks = <&crg HISTB_MMC_CIU_CLK>,
> +               <&crg HISTB_MMC_BIU_CLK>,
> +               <&crg HISTB_MMC_SAMPLE_CLK>,
> +               <&crg HISTB_MMC_DRV_CLK>;
> +      clock-names = "ciu", "biu", "ciu-sample", "ciu-drive";
> +      resets = <&crg 0xa0 4>;
> +      reset-names = "reset";
> +      pinctrl-names = "default";
> +      pinctrl-0 = <&emmc_pins_1 &emmc_pins_2
> +                   &emmc_pins_3 &emmc_pins_4>;
> +      fifo-depth = <256>;
> +      clock-frequency = <200000000>;
> +      cap-mmc-highspeed;
> +      mmc-ddr-1_8v;
> +      mmc-hs200-1_8v;
> +      non-removable;
> +      bus-width = <8>;
> +      status = "okay";

Drop

> +    };
> 

Best regards,
Krzysztof