From: Andrew Lunn <andrew@lunn.ch>
To: James Clark <jjc@jclark.com>
Cc: "David S. Miller" <davem@davemloft.net>,
"Eric Dumazet" <edumazet@kernel.org>,
"Jakub Kicinski" <kuba@kernel.org>,
"Paolo Abeni" <pabeni@redhat.com>,
"Andrew Lunn" <andrew+netdev@lunn.ch>,
"Heiner Kallweit" <hkallweit1@gmail.com>,
"Richard Cochran" <richardcochran@gmail.com>,
"Florian Fainelli" <florian.fainelli@broadcom.com>,
"Doug Berger" <opendmb@gmail.com>,
"Nicolai Buchwitz" <nb@tipi-net.de>,
"Théo Lebrun" <theo.lebrun@bootlin.com>,
"Russell King" <linux@armlinux.org.uk>,
"Conor Dooley" <conor.dooley@microchip.com>,
"Broadcom internal kernel review list"
<bcm-kernel-feedback-list@broadcom.com>,
"Thomas Gleixner" <tglx@kernel.org>,
"Miroslav Lichvar" <mlichvar@redhat.com>,
netdev@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH net-next 0/5] net: mdio: add timestamped MDIO writes for PHY gettimex64
Date: Sun, 11 Oct 2026 15:50:59 +0200 [thread overview]
Message-ID: <804e7c63-e762-4040-9d60-35d21df75531@lunn.ch> (raw)
In-Reply-To: <20261009143506.2507607-1-jjc@jclark.com>
> For example, using PTP_SYS_OFFSET_EXTENDED on the Raspberry Pi CM5 to
> synchronize the system clock from the BCM54210PE PHY PHC leads to the
> system clock being 32 µs ahead of the PHC. On the CM4, it is about 7 µs.
> (The difference is because the MDIO clock frequency is higher on the
> CM4: 10 MHz as opposed to 2.08 MHz on the CM5.)
IEEE 802.3 says the clock should be 2.5Mhz. Does the CM4 use a
clock-frequency DT property to enable this faster clock?
Andrew
next prev parent reply other threads:[~2026-10-11 13:51 UTC|newest]
Thread overview: 26+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-10-09 14:35 [PATCH net-next 0/5] net: mdio: add timestamped MDIO writes for PHY gettimex64 James Clark
2026-10-09 14:35 ` [PATCH net-next 1/5] net: mdio: add timestamped write operation James Clark
2026-10-10 15:10 ` netdev-bot+sashiko
2026-10-11 14:03 ` Andrew Lunn
2026-10-11 14:33 ` James Clark
2026-10-09 14:35 ` [PATCH net-next 2/5] net: phy: broadcom: use timestamped MDIO writes in gettimex64 James Clark
2026-10-10 15:10 ` netdev-bot+sashiko
2026-10-09 14:35 ` [PATCH net-next 3/5] ptp: add functions to adjust system timestamps James Clark
2026-10-10 15:10 ` netdev-bot+sashiko
2026-10-09 14:35 ` [PATCH net-next 4/5] net: macb: implement timestamped MDIO writes James Clark
2026-10-10 15:10 ` netdev-bot+sashiko
[not found] ` <DM1WEUIF8V8V.2OZWRB5G232T4@bootlin.com>
2026-10-11 10:02 ` Théo Lebrun
2026-10-11 13:01 ` James Clark
2026-10-11 21:10 ` Andrew Lunn
2026-10-09 14:35 ` [PATCH net-next 5/5] net: mdio: bcm-unimac: " James Clark
2026-10-09 16:04 ` Florian Fainelli
2026-10-10 1:25 ` James Clark
2026-10-10 15:18 ` Nicolai Buchwitz
2026-10-11 7:20 ` James Clark
2026-10-11 13:22 ` Nicolai Buchwitz
2026-10-12 0:54 ` James Clark
2026-10-10 15:11 ` netdev-bot+sashiko
2026-10-10 4:55 ` [PATCH net-next 0/5] net: mdio: add timestamped MDIO writes for PHY gettimex64 James Clark
2026-10-11 13:50 ` Andrew Lunn [this message]
2026-10-11 14:00 ` James Clark
2026-10-11 18:07 ` Nicolai Buchwitz
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=804e7c63-e762-4040-9d60-35d21df75531@lunn.ch \
--to=andrew@lunn.ch \
--cc=andrew+netdev@lunn.ch \
--cc=bcm-kernel-feedback-list@broadcom.com \
--cc=conor.dooley@microchip.com \
--cc=davem@davemloft.net \
--cc=edumazet@kernel.org \
--cc=florian.fainelli@broadcom.com \
--cc=hkallweit1@gmail.com \
--cc=jjc@jclark.com \
--cc=kuba@kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux@armlinux.org.uk \
--cc=mlichvar@redhat.com \
--cc=nb@tipi-net.de \
--cc=netdev@vger.kernel.org \
--cc=opendmb@gmail.com \
--cc=pabeni@redhat.com \
--cc=richardcochran@gmail.com \
--cc=tglx@kernel.org \
--cc=theo.lebrun@bootlin.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox