ACPI: Use _TSS for throttling control, when present. Add error checks.

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_TSS was erroneously ignored, in favor of the FADT.

When TSS is used, the access width is included in the PTC control/status
register.  So it is unnecessary that the access bit width is multiplied by 8.
At the same time the bit_offset should be considered for system I/O Access.

It should be checked the bit_width and bit_offset of PTC regsiter in order to
avoid the failure of system I/O access. It means that bit_width plus
bit_offset can't be greater than 32.

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Signed-off-by: Li Shaohua <shaohua.li@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>

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Zhao Yakui 2007-11-15 17:05:05 +08:00 • committed by Len Brown

parent 0753f6e0a3

commit 9bcb272173

1 changed files with 35 additions and 7 deletions

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drivers/acpi/processor_throttling.c

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