linux-kernel - Re: [PATCH RFC 3/3] binding: mmc: hi3798cv200-dw-mshc: convert to YAML and rename to histb-dw-mshc, add compatible of hi3798mv200

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Date:   Sun, 16 Apr 2023 07:49:29 +0000
From:   "forbidden405@...look.com" <forbidden405@...look.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        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>
CC:     "linux-mmc@...r.kernel.org" <linux-mmc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>
Subject: Re: [PATCH RFC 3/3] binding: mmc: hi3798cv200-dw-mshc: convert to
 YAML and rename to histb-dw-mshc, add compatible of hi3798mv200

On 4/16/2023 3:26 PM, Krzysztof Kozlowski wrote:
> On 15/04/2023 16:18, Yang Xiwen via B4 Relay wrote:
>> From: Yang Xiwen <forbidden405@...look.com>
>>
>> Hi3798MV200 has an extra clock, also document it here.
> 
> Use subject prefixes matching the subsystem (which you can get for
> example with `git log --oneline -- DIRECTORY_OR_FILE` on the directory
> your patch is touching).
> 
> 
> Subject: it is way too long. It should be just conversion. Don't
> introduce new compatibles.
> 
>>
>> Signed-off-by: Yang Xiwen <forbidden405@...look.com>
>> ---
>>  .../bindings/mmc/hi3798cv200-dw-mshc.txt           | 40 ----------
>>  .../devicetree/bindings/mmc/histb-dw-mshc.yaml     | 90 ++++++++++++++++++++++
>>  2 files changed, 90 insertions(+), 40 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/mmc/hi3798cv200-dw-mshc.txt b/Documentation/devicetree/bindings/mmc/hi3798cv200-dw-mshc.txt
>> deleted file mode 100644
>> index a0693b7145f2a..0000000000000
>> --- a/Documentation/devicetree/bindings/mmc/hi3798cv200-dw-mshc.txt
>> +++ /dev/null
>> @@ -1,40 +0,0 @@
>> -* Hisilicon Hi3798CV200 specific extensions to the Synopsys Designware Mobile
>> -  Storage Host Controller
>> -
>> -Read synopsys-dw-mshc.txt for more details
>> -
>> -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.
>> -
>> -Required Properties:
>> -- compatible: Should contain "hisilicon,hi3798cv200-dw-mshc".
>> -- clocks: A list of phandle + clock-specifier pairs for the clocks listed
>> -  in clock-names.
>> -- clock-names: Should contain the following:
>> -	"ciu" - The ciu clock described in synopsys-dw-mshc.txt.
>> -	"biu" - The biu clock described in synopsys-dw-mshc.txt.
>> -	"ciu-sample" - Hi3798CV200 extended phase clock for ciu sampling.
>> -	"ciu-drive"  - Hi3798CV200 extended phase clock for ciu driving.
>> -
>> -Example:
>> -
>> -	emmc: mmc@...0000 {
>> -		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";
>> -		fifo-depth = <256>;
>> -		clock-frequency = <200000000>;
>> -		cap-mmc-highspeed;
>> -		mmc-ddr-1_8v;
>> -		mmc-hs200-1_8v;
>> -		non-removable;
>> -		bus-width = <8>;
>> -	};
>> diff --git a/Documentation/devicetree/bindings/mmc/histb-dw-mshc.yaml b/Documentation/devicetree/bindings/mmc/histb-dw-mshc.yaml
>> new file mode 100644
>> index 0000000000000..05a435185e9da
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mmc/histb-dw-mshc.yaml
>> @@ -0,0 +1,90 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mmc/histb-dw-mshc.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title:
>> +  Hisilicon Hi3798CV200 specific extensions to the Synopsys Designware Mobile
>> +  Storage Host Controller
>> +
>> +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.
> 
> Drop the last sentence.
> 
>> +
>> +allOf:
>> +  - $ref: "synopsys-dw-mshc-common.yaml#"
> 
> Drop quotes.
> 
>> +  - if:
>> +      properties:
>> +        compatible:
>> +          contains:
>> +            const: hisilicon,hi3798mv200-dw-mshc
>> +    then:
>> +      properties:
>> +        clocks:
>> +          minItems: 5
>> +
>> +        clock-names:
>> +          minItems: 5
> 
> Entire allOf goes after required:.
> 
>> +
>> +properties:
>> +  compatible:
>> +    enum:
>> +      - hisilicon,hi3798cv200-dw-mshc
>> +      - hisilicon,hi3798mv200-dw-mshc
> 
> New compatibles are not related to conversion.
> 
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    minItems: 4
>> +    maxItems: 5
>> +    description: A list of phandles for the clocks listed in clock-names
> 
> Drop description.
> 
>> +
>> +  clock-names:
>> +    minItems: 4
>> +    items:
>> +      - const: ciu
>> +      - const: biu
>> +      - const: ciu-sample
>> +      - const: ciu-drive
>> +      - const: sap-dll-mode
> 
> Only four clocks were in original document. Don't mix different changes
> in one patch.
> 
>> +
>> +unevaluatedProperties: false
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - interrupts
>> +  - clocks
>> +  - clock-names
>> +
>> +examples:
>> +  - |
>> +    emmc: mmc@...0000 {
>> +            compatible = "hisilicon,hi3798cv200-dw-mshc";
>> +            reg = <0x9830000 0x10000>;
> 
> Wrong indentation. Use 4 spaces for example indentation.
> 
>> +            interrupts = <35>;
>> +            clocks = <&crg 1>,
> 
>> +
>>
> 
> Best regards,
> Krzysztof
> 
Thanks, will fix in v3.
By the way, this is v1, v2 fixed some mistakes and the changelog is in
the cover-letter.
-- 
Best regards,
Yang Xiwen