platform/x86/intel-uncore-freq: Ignore minor version change

mainline inclusion
from mainline-v6.7-rc1
commit 4b0d9c8f8f55562ed5346723e66eec64f22887f4
category: feature
bugzilla: https://gitee.com/openeuler/intel-kernel/issues/I8WOEG

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=4b0d9c8f8f55562ed5346723e66eec64f22887f4



-------------------------------------

The hardware definition of every TPMI feature contains a major and minor
version. When there is a change in the MMIO offset or change in the
definition of a field, hardware will change major version. For addition
of new fields without modifying existing MMIO offsets or fields, only the
minor version is changed.

Driver is developed to support uncore frequency control (UFS) for a major
and minor version. If the hardware changes major version, since offsets
and definitions are changed, driver cannot continue to provide UFS
interface to users. Driver can still function with minor version change
as it will just miss the new functionality added by the hardware.

The current implementation logs information message and skips adding
uncore sysfs entry for a resource for any version mismatch. Check major
and minor version mismatch for every valid resource and fail on any major
version mismatch by logging an error message. A valid resource has a
version which is not 0xFF.

If there is mismatch with the minor version, continue with a log message.

Intel-SIG: commit 4b0d9c8f8f55 platform/x86/intel-uncore-freq: Ignore minor version change.
Backport Intel-uncore-freq driver support on TPMI.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Link: https://lore.kernel.org/r/20231003184916.1860084-4-srinivas.pandruvada@linux.intel.com


Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Signed-off-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
[ Yingbao Jia: amend commit log ]
Signed-off-by: Yingbao Jia <yingbao.jia@intel.com>