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DMA has been enabled on RP1's UART0, but with mixed success. Transmits seem to work, but the DMA interface is not well suited to receiving arbitrary amounts of data. In particular, the PL011 driver is slow to pass on the received data, batching it into large blocks. On balance, it's better to just disable the DMA support. As with the other UARTs, the required runes are left in the DTS as comments. 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:
Build status for rpi-6.12.y:
