tools/power/x86/intel-speed-select: Introduce punit to isst_id

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Punit id can also be retrieved from ISST_IF_GET_PHY_ID.

punit id is unique within a Package/Die, and together with Package id and
Die id, they can be used to refer to a specific SST power domain.

For current platforms, Punit id is always Zero. So no functional changes
are expected for the current platforms.

While here, prevent issuing IOCTL if the file /dev/isst_interface can't be
opened.

Signed-off-by: Zhang Rui <rui.zhang@intel.com>
[srinivas.pandruvada@linux.intel.com: changelog edits]
Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>

...

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Zhang Rui 2022-08-17 14:51:40 +08:00 • committed by Srinivas Pandruvada

parent 16c1892080

commit e157c8475e

2 changed files with 57 additions and 23 deletions

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74

tools/power/x86/intel-speed-select/isst-config.c

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6

tools/power/x86/intel-speed-select/isst.h

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