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In all the lp55xx based driver, we have a similar implementation of the stop_all_engine function with the only difference of the required sleep for the OP MODE change. The main difference is legacy LEDs require a min of 152 us while new one use a generic 1-2ms. The new one use a 1-2ms sleep as suggested in the datasheet IN ALTERNATIVE to a much more robust approach by using the newly introduced ENGINE_BUSY bit in the STATUS reg. To better handle sleep after OP MODE change, add support for polling the ENGINE_BUSY bit and use the legacy sleep for old LEDs. With this change, stop_all_engine can be generalized and moved to lp55xx-common. To make more clear the double usage of lp55xx_reg, define a union for additional scope of mask and shift. Update all lp55xx based driver to use the new generalized function and define the required bits in the device_config struct. Suggested-by: Lee Jones <lee@kernel.org> Signed-off-by: Christian Marangi <ansuelsmth@gmail.com> Link: https://lore.kernel.org/r/20240626160027.19703-4-ansuelsmth@gmail.com Signed-off-by: Lee Jones <lee@kernel.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.