netdev - Re: [PATCH net v3 1/4] net: phy: MII-Lite PHY interface mode

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Message-ID: <20250630151122.4bbe2725@fedora.home>
Date: Mon, 30 Jun 2025 15:11:22 +0200
From: Maxime Chevallier <maxime.chevallier@...tlin.com>
To: Kamil Horák - 2N <kamilh@...s.com>
Cc: <florian.fainelli@...adcom.com>,
 <bcm-kernel-feedback-list@...adcom.com>, <andrew@...n.ch>,
 <hkallweit1@...il.com>, <linux@...linux.org.uk>, <davem@...emloft.net>,
 <edumazet@...gle.com>, <kuba@...nel.org>, <pabeni@...hat.com>,
 <krzk+dt@...nel.org>, <conor+dt@...nel.org>, <netdev@...r.kernel.org>,
 <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
 <f.fainelli@...il.com>, <robh@...nel.org>, <andrew+netdev@...n.ch>
Subject: Re: [PATCH net v3 1/4] net: phy: MII-Lite PHY interface mode

Hi Kamil,

On Mon, 30 Jun 2025 13:30:30 +0200
Kamil Horák - 2N <kamilh@...s.com> wrote:

> Some Broadcom PHYs are capable to operate in simplified MII mode,
> without TXER, RXER, CRS and COL signals as defined for the MII.
> The MII-Lite mode can be used on most Ethernet controllers with full
> MII interface by just leaving the input signals (RXER, CRS, COL)
> inactive. The absence of COL signal makes half-duplex link modes
> impossible but does not interfere with BroadR-Reach link modes on
> Broadcom PHYs, because they are all full-duplex only.
> 
> Add MII-Lite interface mode, especially for Broadcom two-wire PHYs.
> 
> Signed-off-by: Kamil Horák - 2N <kamilh@...s.com>

I'm OK with that :)

Reviewed-by: Maxime Chevallier <maxime.chevallier@...tlin.com>

Maxime