linux-kernel - Re: [PATCH 21/21] net: macb: add support for gmac to sam9x7

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Message-ID: <3e262485-bf5f-1a98-e399-e02add3eaa89@microchip.com>
Date:   Mon, 5 Jun 2023 14:07:32 +0200
From:   Nicolas Ferre <nicolas.ferre@...rochip.com>
To:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>,
        Varshini Rajendran <varshini.rajendran@...rochip.com>,
        <tglx@...utronix.de>, <maz@...nel.org>, <robh+dt@...nel.org>,
        <krzysztof.kozlowski+dt@...aro.org>, <conor+dt@...nel.org>,
        <alexandre.belloni@...tlin.com>, <claudiu.beznea@...rochip.com>,
        <davem@...emloft.net>, <edumazet@...gle.com>, <kuba@...nel.org>,
        <pabeni@...hat.com>, <gregkh@...uxfoundation.org>,
        <linux@...linux.org.uk>, <mturquette@...libre.com>,
        <sboyd@...nel.org>, <sre@...nel.org>, <broonie@...nel.org>,
        <arnd@...db.de>, <gregory.clement@...tlin.com>,
        <sudeep.holla@....com>, <balamanikandan.gunasundar@...rochip.com>,
        <mihai.sain@...rochip.com>, <linux-kernel@...r.kernel.org>,
        <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>, <netdev@...r.kernel.org>,
        <linux-usb@...r.kernel.org>, <linux-clk@...r.kernel.org>,
        <linux-pm@...r.kernel.org>
CC:     <Hari.PrasathGE@...rochip.com>, <cristian.birsan@...rochip.com>,
        <durai.manickamkr@...rochip.com>, <manikandan.m@...rochip.com>,
        <dharma.b@...rochip.com>, <nayabbasha.sayed@...rochip.com>,
        <balakrishnan.s@...rochip.com>
Subject: Re: [PATCH 21/21] net: macb: add support for gmac to sam9x7

On 05/06/2023 at 08:42, Krzysztof Kozlowski wrote:
> EXTERNAL EMAIL: Do not click links or open attachments unless you know the content is safe
> 
> On 03/06/2023 22:02, Varshini Rajendran wrote:
>> From: Nicolas Ferre <nicolas.ferre@...rochip.com>
>>
>> Add support for GMAC in sam9x7 SoC family
>>
>> Signed-off-by: Varshini Rajendran <varshini.rajendran@...rochip.com>
>> Signed-off-by: Nicolas Ferre <nicolas.ferre@...rochip.com>
>> ---
>>   drivers/net/ethernet/cadence/macb_main.c | 1 +
>>   1 file changed, 1 insertion(+)
>>
>> diff --git a/drivers/net/ethernet/cadence/macb_main.c b/drivers/net/ethernet/cadence/macb_main.c
>> index 29a1199dad14..609c8e9305ba 100644
>> --- a/drivers/net/ethernet/cadence/macb_main.c
>> +++ b/drivers/net/ethernet/cadence/macb_main.c
>> @@ -4913,6 +4913,7 @@ static const struct of_device_id macb_dt_ids[] = {
>>        { .compatible = "microchip,mpfs-macb", .data = &mpfs_config },
>>        { .compatible = "microchip,sama7g5-gem", .data = &sama7g5_gem_config },
>>        { .compatible = "microchip,sama7g5-emac", .data = &sama7g5_emac_config },
>> +     { .compatible = "microchip,sam9x7-gem", .data = &sama7g5_gem_config },
> 
> These are compatible, aren't they? Why do you need new entry?

The hardware itself is different, even if the new features are not 
supported yet in the macb driver.
The macb driver will certainly evolve in order to add these features so 
we decided to match a new compatible string all the way to the driver.

Best regards,
   Nicolas


-- 
Nicolas Ferre