From: Andrew Lunn <andrew@lunn.ch>
To: Oleksij Rempel <o.rempel@pengutronix.de>
Cc: "Linus Walleij" <linusw@kernel.org>,
"Luiz Angelo Daros de Luca" <luizluca@gmail.com>,
"Vladimir Oltean" <olteanv@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@google.com>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
kernel@pengutronix.de, linux-kernel@vger.kernel.org,
"Ahmad Fatoum" <a.fatoum@pengutronix.de>,
"Alvin Šipraga" <alvin.sipraga@analog.com>,
netdev@vger.kernel.org
Subject: Re: [PATCH net-next v1 1/2] net: phy: realtek: use C45 for RTL8365MB-VC internal PHY MMD access
Date: Mon, 17 Aug 2026 16:44:16 +0200 [thread overview]
Message-ID: <b037f809-4d75-4b59-b47c-c14c166379e9@lunn.ch> (raw)
In-Reply-To: <20260817134758.4182833-2-o.rempel@pengutronix.de>
On Mon, Aug 17, 2026 at 03:47:57PM +0200, Oleksij Rempel wrote:
> The RTL8365MB-VC PHYs are integrated into the switch and have no MMD
> registers of their own. What phylib accesses as MMD registers (EEE)
> actually lives in the switch's OCP registers; the realtek DSA driver maps
> those MMD requests onto OCP and exposes them over C45.
>
> For a C22 PHY, phy_read_mmd()/phy_write_mmd() would use C22 indirect-MMD,
> which this hardware does not implement. Point .read_mmd/.write_mmd at
> genphy_{read,write}_mmd_c45() so phylib's MMD accesses go over C45 to the
> DSA driver's mapping instead.
>
> Signed-off-by: Oleksij Rempel <o.rempel@pengutronix.de>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Andrew
next prev parent reply other threads:[~2026-08-17 14:44 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-08-17 13:47 [PATCH net-next v1 0/2] net: dsa: realtek: EEE support for RTL8365MB-VC Oleksij Rempel
2026-08-17 13:47 ` [PATCH net-next v1 1/2] net: phy: realtek: use C45 for RTL8365MB-VC internal PHY MMD access Oleksij Rempel
2026-08-17 14:44 ` Andrew Lunn [this message]
2026-08-17 13:47 ` [PATCH net-next v1 2/2] net: dsa: realtek: rtl8365mb: add EEE support Oleksij Rempel
2026-08-17 14:53 ` Andrew Lunn
2026-08-17 13:51 ` [PATCH net-next v1 0/2] net: dsa: realtek: EEE support for RTL8365MB-VC Oleksij Rempel
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