platform/x86: ISST: Add Intel Speed Select mailbox interface via PCI

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Add an IOCTL to send mailbox commands to PUNIT using PUNIT PCI device.
A limited set of mailbox commands can be sent to PUNIT.

This MMIO interface is used by the intel-speed-select tool under
tools/x86/power to enumerate and control Intel Speed Select features.
The MBOX commands ids and semantics of the message can be checked from
the source code of the tool.

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>

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Srinivas Pandruvada 2019-06-26 15:38:47 -07:00 • committed by Andy Shevchenko

parent d3a2358429

commit 31a166fe9c

5 changed files with 326 additions and 0 deletions

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include/uapi/linux/isst_if.h

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