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BCM54213PE is an Ethernet PHY that supports PTP hardware timestamping. BCM54210PW ia another Ethernet PHY, but one without PTP support. Unfortunately the two PHYs return the same ID when queried, so some extra information is required to determine whether the PHY is PTP- capable. There are two Raspberry Pi products that use these PHYs - Pi 4B and CM4 - and fortunately they use different PHY addresses, so use that as a differentiator. Choose to treat a PHY with the same ID but another address as a BCM54210PE, which seems more common. See: https://github.com/raspberrypi/linux/issues/5104 Signed-off-by: Phil Elwell <phil@raspberrypi.com>
Linux kernel
There are several guides for kernel developers and users. These guides can be rendered in a number of formats, like HTML and PDF. Please read Documentation/admin-guide/README.rst first.
In order to build the documentation, use make htmldocs or
make pdfdocs. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory, several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the requirements for building and running the kernel, and information about the problems which may result by upgrading your kernel.
Build status for rpi-6.1.y:
Build status for rpi-6.6.y:
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