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99792f1635
Use the PIO hardware on RP1 to implement a PWM interface. Signed-off-by: Phil Elwell <phil@raspberrypi.com> pwm: rp1: use pwmchip_get_drvdata() instead of container_of() The PWM framework may not embed struct pwm_chip within the driver’s private data. Using container_of() can result in accessing invalid memory or NULL pointers, especially after recent kernel changes. Switch to pwmchip_get_drvdata() to reliably access the driver data. This resolves kernel warnings and probe failures seen after updating from kernel 6.12.28 to 6.12.34 [1] While at it remove the now obsolete `struct pwm_chip chip` member from `struct pwm_pio_rp1`. [1] https://github.com/raspberrypi/linux/issues/6971 Signed-off-by: Nicolai Buchwitz <nb@tipi-net.de> pwm: rp1: Silently correct illegal values Remove the need for the user to know the limitations of this PWM implementation by adjusting configuration requests to be the closest acceptable value. Add a get_state method so that the actual values can be queried. Signed-off-by: Phil Elwell <phil@raspberrypi.com> pwm: rp1: Correct period off-by-1 error Correct the set_period method to pass (period - 1), as required by the PIO state machine. 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:
