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Date: Mon, 15 Jan 2024 22:09:36 +0000
From: Daniel Golle <daniel@makrotopia.org>
To: Vladimir Oltean <olteanv@gmail.com>
Cc: =?utf-8?B?QXLEsW7DpyDDnE5BTA==?= <arinc.unal@arinc9.com>,
	Landen Chao <Landen.Chao@mediatek.com>,
	DENG Qingfang <dqfext@gmail.com>,
	Sean Wang <sean.wang@mediatek.com>, Andrew Lunn <andrew@lunn.ch>,
	Florian Fainelli <f.fainelli@gmail.com>,
	"David S. Miller" <davem@davemloft.net>,
	Eric Dumazet <edumazet@google.com>,
	Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
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	linux-arm-kernel@lists.infradead.org,
	linux-mediatek@lists.infradead.org
Subject: Re: [RFC PATCH net-next 7/8] net: dsa: mt7530: correct port
 capabilities of MT7988
Message-ID: <ZaWtIMC9zqwjVewO@makrotopia.org>
References: <20240113102529.80371-1-arinc.unal@arinc9.com>
 <20240113102529.80371-8-arinc.unal@arinc9.com>
 <20240115214238.bnlvomatududng6l@skbuf>
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In-Reply-To: <20240115214238.bnlvomatududng6l@skbuf>

On Mon, Jan 15, 2024 at 11:42:38PM +0200, Vladimir Oltean wrote:
> On Sat, Jan 13, 2024 at 01:25:28PM +0300, Arınç ÜNAL wrote:
> > On the switch on the MT7988 SoC, there are only 4 PHYs. That's port 0 to 3.
> > Set the internal phy cases to '0 ... 3'.
> > 
> > Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
> > Acked-by: Daniel Golle <daniel@makrotopia.org>
> > ---
> 
> For this patch to be obviously correct, please make a statement in the
> commit message about port 4. It doesn't exist at all?

Correct. As shown in Block Diagram 8.1.1.3 on page 125 of
MT7988A Wi-Fi 7 Generation Router Platform: Datasheet (Open Version)
Version: 0.1
Release Date: 2023-10-18
which is available publicly on BananaPi's Wiki[1].

Port 0~3 are TP user ports, Port 6 is internally linked to XGMII of MAC 0.
Port 4 and 5 are not used at all in this design.

[1]: https://wiki.banana-pi.org/Banana_Pi_BPI-R4#Documents