linux-kernel - Re: [PATCH 1/2] dt-bindings: net: dwmac: increase 'maxItems' for 'clocks', 'clock-names' properties

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Date:   Fri, 8 Nov 2019 13:02:14 +0000
From:   Christophe ROULLIER <christophe.roullier@...com>
To:     Maxime Ripard <mripard@...nel.org>
CC:     "davem@...emloft.net" <davem@...emloft.net>,
        "robh+dt@...nel.org" <robh+dt@...nel.org>,
        "mark.rutland@....com" <mark.rutland@....com>,
        "martin.blumenstingl@...glemail.com" 
        <martin.blumenstingl@...glemail.com>,
        "alexandru.ardelean@...log.com" <alexandru.ardelean@...log.com>,
        "narmstrong@...libre.com" <narmstrong@...libre.com>,
        "mcoquelin.stm32@...il.com" <mcoquelin.stm32@...il.com>,
        Alexandre TORGUE <alexandre.torgue@...com>,
        "devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
        "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "linux-stm32@...md-mailman.stormreply.com" 
        <linux-stm32@...md-mailman.stormreply.com>,
        "linux-arm-kernel@...ts.infradead.org" 
        <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 1/2] dt-bindings: net: dwmac: increase 'maxItems' for
 'clocks', 'clock-names' properties

On 11/8/19 11:42 AM, Maxime Ripard wrote:
> Hi,
>
> On Fri, Nov 08, 2019 at 11:35:25AM +0100, Christophe Roullier wrote:
>> This change is needed for some soc based on snps,dwmac, which have
>> more than 3 clocks.
>>
>> Signed-off-by: Christophe Roullier <christophe.roullier@...com>
>> ---
>>   Documentation/devicetree/bindings/net/snps,dwmac.yaml | 8 +++++++-
>>   1 file changed, 7 insertions(+), 1 deletion(-)
>>
>> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> index 4845e29411e4..376a531062c2 100644
>> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> @@ -27,6 +27,7 @@ select:
>>             - snps,dwmac-3.710
>>             - snps,dwmac-4.00
>>             - snps,dwmac-4.10a
>> +          - snps,dwmac-4.20a
>>             - snps,dwxgmac
>>             - snps,dwxgmac-2.10
>>
>> @@ -62,6 +63,7 @@ properties:
>>           - snps,dwmac-3.710
>>           - snps,dwmac-4.00
>>           - snps,dwmac-4.10a
>> +        - snps,dwmac-4.20a
>>           - snps,dwxgmac
>>           - snps,dwxgmac-2.10
>>
>> @@ -87,7 +89,8 @@ properties:
>>
>>     clocks:
>>       minItems: 1
>> -    maxItems: 3
>> +    maxItems: 5
>> +    additionalItems: true
> Those additional clocks should be documented
>
> Maxime

Hi Maxime,

The problem it is specific to our soc, so is it possible to

propose "optional clock" for 2 extras clocks in snps,dwmac.yaml

and "official" description in soc yaml file (stm32-dwmac.yaml) ?

   clocks:
     minItems: 1
     maxItems: 5
     additionalItems: true
     items:
       - description: GMAC main clock
       - description: Peripheral registers interface clock
       - description:
           PTP reference clock. This clock is used for programming the
           Timestamp Addend Register. If not passed then the system
           clock will be used and this is fine on some platforms.

+      - description: optional clock

+      - description: optional clock

Thanks

Christophe