From: Daniel Golle <daniel@makrotopia.org>
To: "Marek Behún" <kabel@kernel.org>
Cc: "Russell King (Oracle)" <linux@armlinux.org.uk>,
Eric Woudstra <ericwouds@gmail.com>, Andrew Lunn <andrew@lunn.ch>,
Heiner Kallweit <hkallweit1@gmail.com>,
"David S. Miller" <davem@davemloft.net>,
Eric Dumazet <edumazet@google.com>,
Jakub Kicinski <kuba@kernel.org>, Paolo Abeni <pabeni@redhat.com>,
Frank Wunderlich <frank-w@public-files.de>,
netdev@vger.kernel.org, Alexander Couzens <lynxis@fe80.eu>
Subject: Re: [PATCH RFC net-next 1/6] net: phy: realtek: configure SerDes mode for rtl822x/8251b PHYs
Date: Thu, 29 Feb 2024 16:34:08 +0000 [thread overview]
Message-ID: <ZeCyAGiZZAFbVxAi@makrotopia.org> (raw)
In-Reply-To: <20240229135010.74e4304a@dellmb>
On Thu, Feb 29, 2024 at 01:50:10PM +0100, Marek Behún wrote:
> On Tue, 27 Feb 2024 10:36:05 +0000
> "Russell King (Oracle)" <linux@armlinux.org.uk> wrote:
>
> > > + ret = phy_write_mmd(phydev, MDIO_MMD_VEND1, 0x75f3, 0);
> > > + if (ret < 0)
> > > + return ret;
> >
> > It would be nice to know what this is doing.
>
> No documentation for this from Realtek, I guess this was just taken
> from SDK originally.
There is an additional datasheet for RTL8226B/RTL8221B called
"SERDES MODE SETTING FLOW APPLICATION NOTE" where this sequence to
setup interface and rate adapter mode, and also the sequence to
disable (H)SGMII in-band-status are described.
However, there is no documentation about the meaning of registers
and bits, it's literally just magic numbers and pseudo-code.
next prev parent reply other threads:[~2024-02-29 16:34 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-02-27 7:51 [PATCH RFC net-next 0/6] rtl8221b/8251b add C45 instances and SerDes switching Eric Woudstra
2024-02-27 7:51 ` [PATCH RFC net-next 1/6] net: phy: realtek: configure SerDes mode for rtl822x/8251b PHYs Eric Woudstra
2024-02-27 10:36 ` Russell King (Oracle)
2024-02-27 13:34 ` Eric Woudstra
2024-02-29 12:50 ` Marek Behún
2024-02-29 16:34 ` Daniel Golle [this message]
2024-03-01 9:24 ` Marek Behún
2024-02-27 7:51 ` [PATCH RFC net-next 2/6] net: phy: realtek: add get_rate_matching() " Eric Woudstra
2024-02-27 10:37 ` Russell King (Oracle)
2024-02-27 7:51 ` [PATCH RFC net-next 3/6] net: phy: realtek: rtlgen_get_speed(): Pass register value as argument Eric Woudstra
2024-02-27 10:38 ` Russell King (Oracle)
2024-02-27 7:51 ` [PATCH RFC net-next 4/6] net: phy: realtek: Add driver instances for rtl8221b/8251b via Clause 45 Eric Woudstra
2024-02-27 10:41 ` Russell King (Oracle)
2024-03-01 9:29 ` Marek Behún
2024-02-27 7:51 ` [PATCH RFC net-next 5/6] net: phy: sfp: Fixup for OEM SFP-2.5G-T module Eric Woudstra
2024-02-27 10:42 ` Russell King (Oracle)
2024-02-27 7:51 ` [PATCH RFC net-next 6/6] net: sfp: add quirk for another multigig RollBall transceiver Eric Woudstra
2024-02-27 10:42 ` Russell King (Oracle)
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