linux-kernel - Re: [PATCH 08/15] dt-bindings: clock: Document ma35d1 clock controller bindings

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Date:   Fri, 17 Mar 2023 10:13:35 +0100
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jacky Huang <ychuang570808@...il.com>, robh+dt@...nel.org,
        krzysztof.kozlowski+dt@...aro.org, lee@...nel.org,
        mturquette@...libre.com, sboyd@...nel.org, p.zabel@...gutronix.de,
        gregkh@...uxfoundation.org, jirislaby@...nel.org
Cc:     devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org,
        schung@...oton.com, Jacky Huang <ychuang3@...oton.com>
Subject: Re: [PATCH 08/15] dt-bindings: clock: Document ma35d1 clock
 controller bindings

On 17/03/2023 04:47, Jacky Huang wrote:
> 
>>
>>> +
>>> +  nuvoton,pll-mode:
>>> +    description:
>>> +      A list of PLL operation mode corresponding to CAPLL, DDRPLL, APLL,
>>> +      EPLL, and VPLL in sequential. The operation mode value 0 is for
>>> +      integer mode, 1 is for fractional mode, and 2 is for spread
>>> +      spectrum mode.
>>> +    $ref: /schemas/types.yaml#/definitions/uint32-array
>>> +    maxItems: 5
>>> +    items:
>>> +      minimum: 0
>>> +      maximum: 2
>> Why exactly this is suitable for DT?
> 
> I will use strings instead.

I have doubts why PLL mode is a property of DT. Is this a board-specific
property?

> 
>>
>>> +
>>> +  nuvoton,sys:
>>> +    description:
>>> +      Phandle to the system management controller.
>>> +    $ref: "/schemas/types.yaml#/definitions/phandle-array"
>> Drop quotes.
>>
>> You need here constraints, look for existing examples.
>>
> 
> I would like to modify this as:
> 
> 
>    nuvoton,sys:
>      description:
>        Use to unlock and lock some clock controller registers. The lock
>        control register is in system controller.
>      $ref: /schemas/types.yaml#/definitions/phandle-array
>      items:
>        - items:
>            - description: phandle to the system controller.

In such case you do not have array. Just make it phandle and drop the items.



Best regards,
Krzysztof