x86/platform/atom/punit: Add Punit device state debug driver

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The patch adds a debug driver, which dumps the power states
of all the North complex (NC) devices. This debug interface is
useful to figure out the devices,  which blocks the S0ix
transitions on the platform. This is extremely useful during
enabling PM on customer platforms and derivatives.

This submission is based on the submission from Mahesh Kumar P:

  https://lkml.org/lkml/2014/11/5/367

Signed-off-by: Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Mahesh Kumar P <mahesh.kumar.p@intel.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: pebolle@tiscali.nl
Link: http://lkml.kernel.org/r/1430939754-6900-2-git-send-email-srinivas.pandruvada@linux.intel.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>

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Srinivas Pandruvada 2015-05-06 12:15:54 -07:00 • committed by Ingo Molnar

parent 1222e564cf

commit 956079e081

4 changed files with 196 additions and 0 deletions

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11

arch/x86/Kconfig.debug

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1

arch/x86/platform/Makefile

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1

arch/x86/platform/atom/Makefile

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183

arch/x86/platform/atom/punit_atom_debug.c

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