linux-kernel - Re: [PATCH v1 2/7] net: stmmac: platform: Add snps,dwmac-5.20 IP compatible string

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Date:   Fri, 9 Dec 2022 10:26:55 +0800
From:   yanhong wang <yanhong.wang@...rfivetech.com>
To:     Ben Dooks <ben.dooks@...ethink.co.uk>
CC:     <linux-riscv@...ts.infradead.org>, <netdev@...r.kernel.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        "Jakub Kicinski" <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        Richard Cochran <richardcochran@...il.com>,
        Andrew Lunn <andrew@...n.ch>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Peter Geis <pgwipeout@...il.com>
Subject: Re: [PATCH v1 2/7] net: stmmac: platform: Add snps,dwmac-5.20 IP
 compatible string



On 2022/12/9 9:59, Ben Dooks wrote:
> 
> 
> On 2022-12-01 09:02, Yanhong Wang wrote:
>> Add "snps,dwmac-5.20" compatible string for 5.20 version that can avoid
>> to define some platform data in the glue layer.
>>
>> Signed-off-by: Emil Renner Berthing <kernel@...il.dk>
>> Signed-off-by: Yanhong Wang <yanhong.wang@...rfivetech.com>
>> ---
>>  drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 3 ++-
>>  1 file changed, 2 insertions(+), 1 deletion(-)
>>
>> diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
>> b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
>> index 50f6b4a14be4..cc3b701af802 100644
>> --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
>> +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
>> @@ -519,7 +519,8 @@ stmmac_probe_config_dt(struct platform_device
>> *pdev, u8 *mac)
>>      if (of_device_is_compatible(np, "snps,dwmac-4.00") ||
>>          of_device_is_compatible(np, "snps,dwmac-4.10a") ||
>>          of_device_is_compatible(np, "snps,dwmac-4.20a") ||
>> -        of_device_is_compatible(np, "snps,dwmac-5.10a")) {
>> +        of_device_is_compatible(np, "snps,dwmac-5.10a") ||
>> +        of_device_is_compatible(np, "snps,dwmac-5.20")) {
>>          plat->has_gmac4 = 1;
>>          plat->has_gmac = 0;
>>          plat->pmt = 1;
> 
> out of interest, is the version of the ip autodetectable yet?
> also, we would be better off if having an if (version > 4) check if we use the standard snps ip block code headers
> 

Yes, the version of the ip is autodetectable. It is also possible to use the standard "snps, dwmac-5.10a" definition on JH7110（has been tested on the VisionFive v2 boards and works normally）, do you have any better suggestions?