Guo Samin
2023-03-09T03:10:14Z

Re: [PATCH v5 03/12] dt-bindings: net: snps,dwmac: Add an optional resets single 'ahb'
From: Rob Herring <robh@kernel.org>

> On Fri, Mar 03, 2023 at 04:59:19PM +0800, Samin Guo wrote:
>> According to:
>> stmmac_platform.c: stmmac_probe_config_dt
>> stmmac_main.c: stmmac_dvr_probe
>
> That's not really a reason on its own. Maybe the driver is wrong. Do we
> know what hardware needs this?
>
Hi Rob, Starfive JH7110 SOC must have two resets (stmmaceth+ahb), it uses snps,dwmac-5.20 IP.

Best regards,
Samin
>> dwmac controller may require one (stmmaceth) or two (stmmaceth+ahb)
>> reset signals, and the maxItems of resets/reset-names is going to be 2.
>>
>> Signed-off-by: Samin Guo <samin.guo@starfivetech.com>
>> ---
>> .../devicetree/bindings/net/snps,dwmac.yaml | 14 ++++++++++----
>> 1 file changed, 10 insertions(+), 4 deletions(-)
>>
>> diff --git a/Documentation/devicetree/bindings/net/snps,dwmac.yaml b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> index b4135d5297b4..89099a888f0b 100644
>> --- a/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> +++ b/Documentation/devicetree/bindings/net/snps,dwmac.yaml
>> @@ -133,12 +133,18 @@ properties:
>> - ptp_ref
>>
>> resets:
>> - maxItems: 1
>> - description:
>> - MAC Reset signal.
>> + minItems: 1
>> + items:
>> + - description: GMAC stmmaceth reset
>> + - description: AHB reset
>>
>> reset-names:
>> - const: stmmaceth
>> + minItems: 1
>> + maxItems: 2
>> + contains:
>
> This means 'reset-names = "foo", "ahb";' is valid. You want 'items'
> instead. However, that still allows the below string in any order. Do we
> really need that? If not, then you want:
>
> items:
> - const: stmmaceth
> - const: ahb
>
Thank you for your guidance. It will be better to modify it in this way, I will fix it in next version.

Best regards,
Samin
>> + enum:
>> + - stmmaceth
>> + - ahb
>>
>> power-domains:
>> maxItems: 1
>> --
>> 2.17.1
>>