The max77851 driver is failing to build for Linux kernels v5.16 to v6.0
and the following error is seen ...
drivers/thermal/max77851_thermal.c:173:30: error: implicit declaration
of function 'devm_thermal_of_zone_register'; did you mean
'devm_thermal_zone_of_sensor_register'?
[-Werror=implicit-function-declaration]
thermal->tz_device = devm_thermal_of_zone_register(&pdev->dev, 0,
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
The function devm_thermal_of_zone_register() was introduced in Linux
kernel v6.1 and not v5.16.
Instead of relying on kernel version to determine if this function is
present using the conftest.sh script which checks the kernel that is
being compiled to see if this function is present or not. This is also
beneficial for working with 3rd party Linux kernels that may have
back-ported upstream changes into their kernel and so the kernel version
checks do not work either.
Bug 200749982
Change-Id: I8d5e70d2d39497d7f513c82cd3a45312b2bc016a
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2980925
The script conftest.sh can be used at build time to determine which
kernel headers or versions of kernel functions/macros are present in the
kernel that drivers are being compiled against. This is useful for cases
where changes are backported from upstream Linux kernels that may change
kernel functions and so we can no longer rely on the kernel version to
indicate which version of the kernel function to use.
The conftest.h header file is a top-level header file that includes all
the header files that are generated by the conftest.sh script. This
header file can be included by drivers so that they can use the various
definitions that are generated by conftest.sh. This file is located
along with the conftest.sh script because this is copied to the output
directory where all the generated header files are placed.
Bug 4119327
Bug 4228080
Change-Id: I781884e359e9688640661548620e01a178debac9
Signed-off-by: Jon Hunter <jonathanh@nvidia.com>
Reviewed-on: https://git-master.nvidia.com/r/c/linux-nv-oot/+/2974065
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>
