#Motorcomm
A mistake I initially made was that several chips claim PTP support, but just because a chip claims PTP support doesn't mean it supports hardware timestamping. Examples: the Motorcomm yt8531c, or the TI DP83822. Both have PTP registers, but IIUC they're simply a hardware interrupt, not a timestamper
SSZTAU5 Technical article | TI.com
How to Implement IEEE 1588 Time Stamping in an Ethernet Transceiver
www.ti.com
March 12, 2026 at 12:33 AM
Re: [net-next v6 0/3] Add motorcomm 8531s set ds func and 8522 driver patchwork-bot+netdevbpf@kernel ... writes: (Summary) Hello: Hello: This series was applied to netdev/net-next.git (main) by Jak...

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LKML: patchwork-bot+netdevbpf@kernel ...: Re: [net-next v6 0/3] Add motorcomm 8531s set ds func and 8522 driver
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June 10, 2026 at 1:08 AM
Re: [PATCH net v1] net: phy: motorcomm: yt8821: disable MDIO broad ... Jakub_Vaněk writes:

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February 22, 2026 at 9:56 AM
Re: [PATCH net v1] net: phy: motorcomm: yt8821: disable MDIO broad ... Jakub_Vaněk writes:

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February 22, 2026 at 4:31 AM
Re: [PATCH net v1] net: phy: motorcomm: yt8821: disable MDIO broad ... Andrew Lunn writes:

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February 22, 2026 at 4:00 AM
Re: [PATCH net v1] net: phy: motorcomm: yt8821: disable MDIO broad ... Jakub_Vaněk writes:

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February 22, 2026 at 2:48 AM
New version of @FriendlyARM_ NanoPi R2S dual Gigabit Ethernet #router that replaces #Realtek RTL8211E by Motorcomm YT8521S GbE PHY due to #supplyissues. #linux #armbian #supplychain #networking.

cnx-software.com/2021/08/14/nan…
NanoPi R2C is a cheaper dual GbE mini router with YT8521S Gigabit Ethernet PHY - CNX Software
FriendlyELEC's NanoPi R2C is an updated version of NanoPi R2S dual GbE mini router that replaces Realtek RTL8211E Gigabit Ethernet transceiver with a
www.cnx-software.com
February 6, 2025 at 2:01 AM
however, to support the yt8601 NICs which most likely have better performance, i will need to package the third party driver, most likely as an AKMS module for now.

looks like there are upstreaming efforts by motorcomm, but it will probably be Linux 6.14 or later until we see an upstream driver
November 28, 2024 at 7:28 AM
all of you are wrong. the chip is Motorcomm YT8531

>>> hex(await mdio_iface.c22_read(0, 2))
'0x4f51'
>>> hex(await mdio_iface.c22_read(0, 3))
'0xe91b'

as for _how come_ the chip is Motorcomm YT8531? well, JLC PCBA has a few questions to answer now...
January 26, 2026 at 6:07 PM
yt6801-dkms
Kernel module for Motorcomm YT6801 ethernet controller (DKMS)
aur.archlinux.org
June 1, 2025 at 1:58 PM