linux-kernel - Re: [PATCH v1 2/4] dt-bindings: phy: Add starfive,jh7110-dphy-rx

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Date:   Tue, 14 Feb 2023 11:07:27 +0800
From:   Changhuang Liang <changhuang.liang@...rfivetech.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Conor Dooley <conor@...nel.org>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Philipp Zabel <p.zabel@...gutronix.de>
CC:     Jack Zhu <jack.zhu@...rfivetech.com>,
        <linux-phy@...ts.infradead.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <linux-riscv@...ts.infradead.org>
Subject: Re: [PATCH v1 2/4] dt-bindings: phy: Add starfive,jh7110-dphy-rx



On 2023/2/13 17:30, Krzysztof Kozlowski wrote:
> On 10/02/2023 07:17, Changhuang Liang wrote:
>> Starfive SoC like the jh7110 use a MIPI D-PHY RX controller based on
>> a M31 IP. Add a binding for it.
>>
>> Signed-off-by: Changhuang Liang <changhuang.liang@...rfivetech.com>
>> ---
>>  .../bindings/phy/starfive,jh7110-dphy-rx.yaml | 78 +++++++++++++++++++
>>  1 file changed, 78 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml b/Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
>> new file mode 100644
>> index 000000000000..1c1e5c7cbee2
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/phy/starfive,jh7110-dphy-rx.yaml
>> @@ -0,0 +1,78 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/phy/starfive,jh7110-dphy-rx.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: Starfive SoC MIPI D-PHY Rx Controller
>> +
>> +maintainers:
>> +  - Jack Zhu <jack.zhu@...rfivetech.com>
>> +  - Changhuang Liang <changhuang.liang@...rfivetech.com>
>> +
>> +description: |
>> +  The Starfive SOC has a MIPI CSI D-PHY based on M31 IP use to transfer
>> +  the CSI cameras data.
>> +
>> +properties:
>> +  compatible:
>> +    items:
> 
> Drop items
> 

OK, will fix it

>> +      - const: "starfive,jh7110-dphy-rx"
> 
> Drop quotes
> 

OK, will drop quotes

>> +
>> +  reg:
>> +    maxItems: 1
>> +
>> +  clocks:
>> +    minItems: 3
> 
> Drop minItems
> 

OK, will drop minItems

>> +    maxItems: 3
>> +
>> +  clock-names:
>> +    items:
>> +      - const: cfg
>> +      - const: ref
>> +      - const: tx
>> +
>> +  resets:
>> +    minItems: 2
> 
> Ditto
> 

here i will change to define each reset is.
Refer to the Rob Herring's comment.

>> +    maxItems: 2
>> +
>> +  starfive,aon-syscon:
>> +    $ref: '/schemas/types.yaml#/definitions/phandle-array'
> 
> Drop quotes
> 

OK, will drop quotes

>> +    items:
>> +      items:
>> +        - description: phandle of AON SYSCON
>> +        - description: register offset
>> +    description: The register of dphy rx driver can be configured
>> +      by AON SYSCON in this property.
> 
> Can be? So does not have to? But you made it a required property....
> 

Maybe I described it wrong.
I will change to:
	description: The power of dphy rx can be configured by AON SYSCON
	  in this property.
It is like AON SYSCON is the power switch of the dphy rx, it is necessary to
configure the AON SYSCON register, so I made it a required property.

>> +
>> +  "#phy-cells":
>> +    const: 0
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - clocks
>> +  - clock-names
>> +  - resets
>> +  - starfive,aon-syscon
>> +  - "#phy-cells"
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    #include <dt-bindings/clock/starfive,jh7110-crg.h>
>> +    #include <dt-bindings/reset/starfive,jh7110-crg.h>
>> +
>> +    dphy@...20000 {
> 
> just phy@......
> 

OK, will fix it.

>> +      compatible = "starfive,jh7110-dphy-rx";
>> +      reg = <0x19820000 0x10000>;
>> +      clocks = <&ispcrg JH7110_ISPCLK_M31DPHY_CFGCLK_IN>,
>> +               <&ispcrg JH7110_ISPCLK_M31DPHY_REFCLK_IN>,
>> +               <&ispcrg JH7110_ISPCLK_M31DPHY_TXCLKESC_LAN0>;
>> +      clock-names = "cfg", "ref", "tx";
>> +      resets = <&ispcrg JH7110_ISPRST_M31DPHY_HW>,
>> +               <&ispcrg JH7110_ISPRST_M31DPHY_B09_ALWAYS_ON>;
>> +      starfive,aon-syscon = <&aon_syscon 0x00>;
>> +      #phy-cells = <0>;
>> +    };
> 
> Best regards,
> Krzysztof
>