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smtp.subspace.kernel.org; dkim=pass header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=LA8K4a0v; arc=none smtp.remote-ip=100.103.45.18 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (prime256v1)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 13D99606A332; Wed, 4 Nov 2026 07:20:22 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key, unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20260515 header.b=LA8K4a0v Received: by smtp.kernel.org (Postfix) with ESMTPSA id 8DC851F00919; Wed, 4 Nov 2026 07:20:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1793776821; bh=1Ekpcp5TWZq0p4aqoWrcejQKlqmgI+qIHdFwhI1gIDo=; h=Date:Subject:To:Cc:References:From:In-Reply-To; b=LA8K4a0vJgQc39wUUG6i4hpczNDWdG+toSwrlumPAhyZytI5rGsyVjLUN56z84i4I eI7XB0uiMOIddzetTqmIiFzKr3PQDR6TmcEN2fFmw2dwYbZoaZsmLxzCEAGb0LVgwv Ww3grG7RbPpKmn9hpAHHMEf90NZvOJAeo/NdQKK9yah1Zw70/VSDsCj5SbTuRoBl2L XW8ZKc12B73OSjaOA+8CQuAw7GgcBN8Rfjoq7Egg1Z/XcjxFp1AH5aExHRbhlnFMq/ SEYYVOMmDOdziKm4BnBrXO0xgsU4Ue03iDAmgYVQxl7nAwyeh/Prhi14AfBRb+K+6t n6iEpRfyPXyXw== Message-ID: <7c15c254-d157-4f5b-bfae-06a5301af222@kernel.org> Date: Wed, 4 Nov 2026 08:20:11 +0100 X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Post: List-Help: List-Subscribe: List-Unsubscribe: List-Owner: Precedence: list MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v4 6/7] dt-bindings: net: dsa: mediatek,mt7530: add EcoNet EN751221 switches To: Caleb James DeLisle Cc: netdev@vger.kernel.org, andrew@lunn.ch, olteanv@gmail.com, davem@davemloft.net, edumazet@google.com, kuba@kernel.org, pabeni@redhat.com, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, matthias.bgg@gmail.com, angelogioacchino.delregno@collabora.com, chester.a.unal@arinc9.com, daniel@makrotopia.org, linux@armlinux.org.uk, arinc.unal@arinc9.com, Landen.Chao@mediatek.com, dqfext@gmail.com, sean.wang@mediatek.com, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-mediatek@lists.infradead.org, naseefkm@gmail.com, b.larsson@gmx.com References: <20261029184202.1859843-1-cjd@cjdns.fr> <20261029184202.1859843-7-cjd@cjdns.fr> <20261103-soft-lyrical-squid-c5a108@quoll> <39cb446e-b667-4766-bd79-2635eb36166c@cjdns.fr> From: Krzysztof Kozlowski Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit On 03/11/2026 14:15, Caleb James DeLisle wrote: >>> + const: econet,en751221-gswitch >> That's almost the same compatible, which makes me wonder if you describe >> the same device twice. Same device, same compatible. > > > Well, these are both MT7530 based, but one of them is on-die with the > SoC and the other one is an MCM so for the driver they are very > different - they're even loaded by different kmods. I think since one is > MMIO and the other is MDIO, using the same compatible won't cause a > driver problem - but I don't know if it's best practice to smooth over > such a difference or not. Your advice here would be most appreciated. > The drivers do not matter - we have one compatible for I2C/SPI/Serial devices as well. The only question is about the hardware, what are these devices and what are you here exactly describing. Compatible is en751221 but you call it MT7530, so even more confusion. Best regards, Krzysztof