linux-kernel - Re: [PATCH v4 1/4] dt-bindings: mmc: Add StarFive MMC module

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Message-ID: <9ef960ae-7b61-9ed3-5bab-822e6d7d5a76@starfivetech.com>
Date:   Wed, 15 Feb 2023 20:08:14 +0800
From:   William Qiu <william.qiu@...rfivetech.com>
To:     Shengyu Qu <wiagn233@...look.com>,
        <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 v4 1/4] dt-bindings: mmc: Add StarFive MMC module



On 2023/2/15 19:59, Shengyu Qu wrote:
> Hello William,
> 
> Are you sure changing driver is better than changing yaml bindings? All
> 
> previous version sent was syscon and sysreg seems not consistent with
> 
> other codes.
> 
> Best regards,
> 
> Shengyu
>

Hi Shengyu,

After discussing with colleagues, we decided to restore the lable name to 
sys_syscon, and sysreg was just a unique name for the functionality of MMC,
which will be used in all future versions.

Thanks for taking time reviewing this patch series.

Best Regards
William

>> Add documentation to describe StarFive designware mobile storage
>> host controller driver.
>>
>> Signed-off-by: William Qiu <william.qiu@...rfivetech.com>
>> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
>> ---
>>   .../bindings/mmc/starfive,jh7110-mmc.yaml     | 77 +++++++++++++++++++
>>   1 file changed, 77 insertions(+)
>>   create mode 100644 Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml b/Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
>> new file mode 100644
>> index 000000000000..51e1b04e799f
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/mmc/starfive,jh7110-mmc.yaml
>> @@ -0,0 +1,77 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/mmc/starfive,jh7110-mmc.yaml#
>> +$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#
>> +
>> +maintainers:
>> +  - William Qiu <william.qiu@...rfivetech.com>
>> +
>> +properties:
>> +  compatible:
>> +    const: starfive,jh7110-mmc
>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    items:
>> +      - description: biu clock
>> +      - description: ciu clock
>> +
>> +  clock-names:
>> +    items:
>> +      - const: biu
>> +      - const: ciu
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  starfive,sysreg:
>> +    $ref: /schemas/types.yaml#/definitions/phandle-array
>> +    items:
>> +      - items:
>> +          - description: phandle to System Register Controller syscon node
>> +          - description: offset of SYS_SYSCONSAIF__SYSCFG register for MMC controller
>> +          - description: shift of SYS_SYSCONSAIF__SYSCFG register for MMC controller
>> +          - description: mask of SYS_SYSCONSAIF__SYSCFG register for MMC controller
>> +    description:
>> +      Should be four parameters, the phandle to System Register Controller
>> +      syscon node and the offset/shift/mask of SYS_SYSCONSAIF__SYSCFG register
>> +      for MMC controller.
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +  - interrupts
>> +  - starfive,sysreg
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> +  - |
>> +    mmc@...10000 {
>> +        compatible = "starfive,jh7110-mmc";
>> +        reg = <0x16010000 0x10000>;
>> +        clocks = <&syscrg 91>,
>> +                 <&syscrg 93>;
>> +        clock-names = "biu","ciu";
>> +        resets = <&syscrg 64>;
>> +        reset-names = "reset";
>> +        interrupts = <74>;
>> +        fifo-depth = <32>;
>> +        fifo-watermark-aligned;
>> +        data-addr = <0>;
>> +        starfive,sysreg = <&sys_syscon 0x14 0x1a 0x7c000000>;
>> +    };