linux-kernel - Re: [PATCH v1 1/3] dt-bindings: mmc: Add bindings for StarFive

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Message-ID: <b0dfc269-e06e-4f4d-7695-55c8522d6137@starfivetech.com>
Date:   Thu, 8 Dec 2022 16:44:21 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        <linux-riscv@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-mmc@...r.kernel.org>
CC:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Jaehoon Chung <jh80.chung@...sung.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v1 1/3] dt-bindings: mmc: Add bindings for StarFive



On 2022/12/7 23:13, Krzysztof Kozlowski wrote:
> On 07/12/2022 14:17, William Qiu wrote:
>> Add documentation to describe StarFive
>> designware mobile storage host controller driver.
>> 
>> Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
>> ---
>>  .../bindings/mmc/starfive,jh7110-sdio.yaml    | 71 +++++++++++++++++++
>>  1 file changed, 71 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/mmc/starfive,jh7110-sdio.yaml
>> 
>> diff --git a/Documentation/devicetree/bindings/mmc/starfive,jh7110-sdio.yaml b/Documentation/devicetree/bindings/mmc/starfive,jh7110-sdio.yaml
>> new file mode 100644
>> index 000000000000..4f27ef3cf4f3
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mmc/starfive,jh7110-sdio.yaml
>> @@ -0,0 +1,71 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mmc/starfive,jh7110-sdio.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: StarFive Designware Mobile Storage Host Controller
>> +
>> +description:
>> +  StarFive uses the Synopsys designware mobile storage host controller
>> +  to interface a SoC with storage medium such as eMMC or SD/MMC cards.
>> +
>> +allOf:
>> +  - $ref: "synopsys-dw-mshc-common.yaml#"
> 
> Drop quotes
> 

Will fix.

>> +
>> +maintainers:
>> +  - William Qiu <william.qiu@...rfivetech.com>
>> +
>> +properties:
>> +  compatible:
>> +    const: starfive,jh7110-sdio
> 
> Why do you call it sdio if the interface is for mmc as well?
> 

Will update compatible.

>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    minItems: 1
>> +    items:
>> +      - description: biu clock
>> +      - description: ciu clock
> 
> I don't think the card interface clock is optional... are you sure you
> have designs working without it? No clock line at all getting to the memory?
> 

Will fix.

>> +
>> +  clock-names:
>> +    minItems: 1
>> +    items:
>> +      - const: biu
>> +      - const: ciu
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  starfive,sys-syscon:
>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>> +    description:
>> +      The desired number of times that the host execute tuning when needed.
> 
> That's not matching the property name. Missing number of items... this
> is anyway confusing. Why number of tuning tries is a property of DT?
> 

Will update the description.

>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +  - interrupts
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/clock/starfive-jh7110.h>
>> +    #include <dt-bindings/reset/starfive-jh7110.h>
>> +    mmc@...10000 {
>> +            compatible = "starfive,jh7110-sdio";
> 
> Use 4 spaces for example indentation.
> 

I'll fix the indentation.

>> +            reg = <0x16010000 0x10000>;
>> +            clocks = <&syscrg JH7110_SYSCLK_SDIO0_AHB>,
>> +                 <&syscrg JH7110_SYSCLK_SDIO0_SDCARD>;
> 
> Align with previous <
> 

I will fix.

Thank you for taking time to review and provide helpful comments for this patch.

Best regards,
William Qiu

> Best regards,
> Krzysztof
>