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22fc857538
Even though the previous binding made it a required child node, the implementation in Linux never made it mandatory and just ignored thermal zones without trip points. This was even effectively encouraged, since the thermal core wouldn't allow a thermal sensor to probe without a thermal zone. In the case where you had a thermal device that had multiple sensors but with enough knowledge to provide trip points for only a few of them, this meant that the only way to make that driver probe was to provide a thermal zone without the trips node required by the binding. This obviously led to a fair number of device trees doing exactly that, making the initial binding requirement ineffective. Let's make it clear by dropping that requirement. Cc: Amit Kucheria <amitk@kernel.org> Cc: Daniel Lezcano <daniel.lezcano@linaro.org> Cc: linux-pm@vger.kernel.org Cc: Zhang Rui <rui.zhang@intel.com> Signed-off-by: Maxime Ripard <maxime@cerno.tech> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org> Link: https://lore.kernel.org/r/20210721140424.725744-34-maxime@cerno.tech
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.