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fe4e81979a
For debugging purposes, add a simple, read-only debugfs interface to dump the following fifo registers: ISR - Interrupt Status Register IER - Interrupt Enable Register TDFV - Transmit Data FIFO Vacancy RDFO - Receive Data FIFO Occupancy $ cat /sys/kernel/debug/43c00000.axi_fifo_mm_s/regs isr: 0x00000000 ier: 0xfe000000 tdfv: 0x000001fc rdfo: 0x00000000 Signed-off-by: Ovidiu Panait <ovidiu.panait.oss@gmail.com> Link: https://lore.kernel.org/r/20250720183833.3570345-2-ovidiu.panait.oss@gmail.com Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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 reStructuredText 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.