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Merge series from Andy Shevchenko <andriy.shevchenko@linux.intel.com>:
Currently the SPI PXA2xx devices on Intel platforms can be instantiated
via the following paths:
1) as ACPI LPSS device on Haswell, Bay Trail and Cherry Trail;
2) as ACPI LPSS device on the Sky Lake and newer;
3) as PCI LPSS device on Haswell, Bay Trail and Cherry Trail;
4) as PCI LPSS device on the Sky Lake and newer;
5) as PCI device via ID table.
Each of these cases provides some platform related data differently,
i.e.:
1) via drivers/acpi/acpi_lpss.c and drivers/spi/spi-pxa2xx.c
2) via drivers/mfd/intel-lpss-acpi.c
3) via drivers/spi/spi-pxa2xx-pci.c
4) via drivers/mfd/intel-lpss-pci.c and drivers/spi/spi-pxa2xx.c
5) via drivers/spi/spi-pxa2xx-pci.c
This approach has two downsides:
a) there is no data propagated in the case #2 because we can't have
two or more drivers to match the same ACPI ID and hence some cases
are still not supported (Sky Lake and newer ACPI enabled LPSS);
b) the data is duplicated over two drivers in the cases #1 & #4 and,
besides to be a bloatware, it is error prone (e.g. Lakefield has
a wrong data right now due to missed PCI entry in the spi-pxa2xx.c).
This series fixes the downsides, and enables previously unsupported
cases.
55201afd6e