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| author |   Srinivas Pandruvada <srinivas.pandruvada@linux.intel.com> | 2015-05-06 12:15:54 -0700 |
|---|---|---|
| committer |   Ingo Molnar <mingo@kernel.org> | 2015-05-07 11:18:27 +0200 |
| commit | 956079e081427fe0c929eb284ab7e39f9b8e2023 (patch) | |
| tree | e9b22da8b1fa79b0480f2b8d21e3c6da696f3c5c /arch/x86/Kconfig.debug | |
| parent | x86/platform/uv: Make SGI UV dependent on CONFIG_PCI (diff) | |
| download | linux-dev-956079e081427fe0c929eb284ab7e39f9b8e2023.tar.xz linux-dev-956079e081427fe0c929eb284ab7e39f9b8e2023.zip | |
x86/platform/atom/punit: Add Punit device state debug driver
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>
Diffstat (limited to 'arch/x86/Kconfig.debug')
| -rw-r--r-- | arch/x86/Kconfig.debug | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug index 72484a645f05..a5973f851750 100644 --- a/arch/x86/Kconfig.debug +++ b/arch/x86/Kconfig.debug @@ -332,4 +332,15 @@ config X86_DEBUG_STATIC_CPU_HAS If unsure, say N. +config PUNIT_ATOM_DEBUG + tristate "ATOM Punit debug driver" + select DEBUG_FS + select IOSF_MBI + ---help--- + This is a debug driver, which gets the power states + of all Punit North Complex devices. The power states of + each device is exposed as part of the debugfs interface. + The current power state can be read from + /sys/kernel/debug/punit_atom/dev_power_state + endmenu |