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commit57b3006492upstream. My assumption in commitb53548f9d9("spi: pxa2xx: Remove LPSS private register restoring during resume") that Intel Lynxpoint and compatible based chipsets may not need LPSS private registers saving and restoring over suspend/resume cycle turned out to be false on Intel Broadwell. Curtis Malainey sent a patch bringing above change back and reported the LPSS SPI Chip Select control was lost over suspend/resume cycle on Broadwell machine. Instead of reverting above commit lets add LPSS private register saving/restoring also for all LPSS SPI, I2C and UART controllers on Lynxpoint and compatible chipset to make sure context is not lost in case nothing else preserves it like firmware or if LPSS is always on. Fixes:b53548f9d9("spi: pxa2xx: Remove LPSS private register restoring during resume") Reported-by: Curtis Malainey <cujomalainey@chromium.org> Tested-by: Curtis Malainey <cujomalainey@chromium.org> Cc: 5.0+ <stable@vger.kernel.org> # 5.0+ Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.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 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.