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Message-ID: <188688f2-1028-41ee-ba0a-c52456f63111@gmail.com>
Date:   Sun, 15 Oct 2023 14:18:43 -0700
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Subject: Re: [PATCH net-next v3 2/7] net: dsa: microchip: Set unique MAC at
 startup for WoL support
Content-Language: en-US
To:     Vladimir Oltean <olteanv@gmail.com>,
        Oleksij Rempel <o.rempel@pengutronix.de>
Cc:     "David S. Miller" <davem@davemloft.net>,
        Andrew Lunn <andrew@lunn.ch>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Woojung Huh <woojung.huh@microchip.com>,
        Arun Ramadoss <arun.ramadoss@microchip.com>,
        Conor Dooley <conor+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Rob Herring <robh+dt@kernel.org>, kernel@pengutronix.de,
        linux-kernel@vger.kernel.org, netdev@vger.kernel.org,
        UNGLinuxDriver@microchip.com,
        "Russell King (Oracle)" <linux@armlinux.org.uk>,
        devicetree@vger.kernel.org
References: <20231013122405.3745475-1-o.rempel@pengutronix.de>
 <20231013122405.3745475-3-o.rempel@pengutronix.de>
 <20231013123249.bhigwsezy6afb5qt@skbuf>
From:   Florian Fainelli <f.fainelli@gmail.com>
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On 10/13/2023 5:32 AM, Vladimir Oltean wrote:
> On Fri, Oct 13, 2023 at 02:24:00PM +0200, Oleksij Rempel wrote:
>> Set a unique global MAC address for each switch on the network at system
>> startup by syncing the switch's global MAC address with the Ethernet
>> address of the DSA master interface. This is crucial for supporting
>> Wake-on-LAN (WoL) functionality, as it requires a unique address for
>> each switch.
>>
>> Although the operation is performed only at system start and won't sync
>> if the master Ethernet address changes dynamically, it lays the
>> groundwork for WoL support by ensuring a unique MAC address for each
>> switch.
>>
>> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
>> ---
> 
> Why not take the MAC address of the user port at ksz9477_set_wol() time,
> and use the existing ksz_switch_macaddr_get() API that was just added so
> that this use case could work?

Agreed we do that in a number of Ethernet MAC and PHY drivers FWIW 
(net_device::dev_addr).
-- 
Florian