linux-kernel - Re: [PATCH net v4 1/4] net: phy: MII-Lite PHY interface mode

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Message-ID: <034736ec-4449-42c4-9b42-69a0cdb364de@broadcom.com>
Date: Mon, 30 Jun 2025 10:06:28 -0700
From: Florian Fainelli <florian.fainelli@...adcom.com>
To: Kamil Horák - 2N <kamilh@...s.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
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org,
 linux-kernel@...r.kernel.org, f.fainelli@...il.com, robh@...nel.org,
 andrew+netdev@...n.ch, Maxime Chevallier <maxime.chevallier@...tlin.com>
Subject: Re: [PATCH net v4 1/4] net: phy: MII-Lite PHY interface mode

On 6/30/25 06:58, Kamil Horák - 2N 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>
> Reviewed-by: Maxime Chevallier <maxime.chevallier@...tlin.com>

Reviewed-by: Florian Fainelli <florian.fainelli@...adcom.com>
-- 
Florian