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Add module for accessing the mailbox property channel through /dev/vcio. Was previously in bcm2708-vcio. Signed-off-by: Noralf Trønnes <noralf@tronnes.org> char: vcio: Add compat ioctl handling There was no compat ioctl handler, so 32 bit userspace on a 64 bit kernel failed as IOCTL_MBOX_PROPERTY used the size of char*. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> char: vcio: Fail probe if rpi_firmware is not found. Device Tree is now the only supported config mechanism, therefore uncomment the block of code that fails the probe if the firmware node can't be found. Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.org> drivers: char: vcio: Use common compat header The definition of compat_ptr is now common for most platforms, but requires the inclusion of <linux/compat.h>. Signed-off-by: Phil Elwell <phil@raspberrypi.com> char: vcio: Rewrite as a firmware node child The old vcio driver is a simple character device that manually locates the firmware driver. Initialising it before the firmware driver causes a failure, and no retries are attempted. Rewrite vcio as a platform driver that depends on a DT node for its instantiation and the location of the firmware driver, making use of the miscdevice framework to reduce the code size. N.B. Using miscdevice changes the udev SUBSYSTEM string, so a change to the companion udev rule is required in order to continue to set the correct device permissions, e.g.: KERNEL="vcio", GROUP="video", MODE="0660" See: https://github.com/raspberrypi/linux/issues/4620 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-5.15.y:
Build status for rpi-6.1.y:
Build status for rpi-6.6.y:
