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a55383dec6
SCMI-enabled boards may restrict access to resources like clocks, resets
and regulators to the secure world.
A normal world bootloader or kernel compatible with the non-SCMI-enabled
board is thus not guaranteed to be able to deal with the SCMI variant.
It follows, that the SCMI-enabled board is not compatible with the
non-SCMI enabled board, so drop that compatible.
This change is motivated by the barebox' bootloader's use of bootloader
specification files[1][2]: barebox for non-SCMI DK2 will compare its
own top-level "stm32mp157c-dk2" compatible with all compatibles
listed in the device tree referenced by each bootloader spec file.
If the boot medium contains a configuration with
compatible = "st,stm32mp157c-dk2-scmi", "st,stm32mp157c-dk2", "st,stm32mp157";
it will match, because of the second compatible and boot a kernel with
SCMI enabled, although no SCMI may exist on the platform.
[1]: https://uapi-group.org/specifications/specs/boot_loader_specification/
[2]: https://www.barebox.org/doc/latest/user/booting-linux.html#boot-loader-specification
Fixes: 8e14ebb1f0 ("dt-bindings: arm: stm32: Add SCMI version of STM32 boards (DK1/DK2/ED1/EV1)")
Signed-off-by: Ahmad Fatoum <a.fatoum@pengutronix.de>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Alexandre Torgue <alexandre.torgue@foss.st.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.