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| author | Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> | 2008-02-11 17:46:31 -0800 |
|---|---|---|
| committer | Len Brown <len.brown@intel.com> | 2008-02-14 00:09:55 -0500 |
| commit | 4fcb2fcd4d0678b8ae103d257dcb28074cbfc7fa (patch) | |
| tree | 54bcf486976184804c8fc786d09a04e1ce26ef99 /include/linux/cpuidle.h | |
| parent | e760e716d47b48caf98da348368fd41b4a9b9e7e (diff) | |
| download | lwn-4fcb2fcd4d0678b8ae103d257dcb28074cbfc7fa.tar.gz lwn-4fcb2fcd4d0678b8ae103d257dcb28074cbfc7fa.zip | |
ACPI, cpuidle: Clarify C-state description in sysfs
Add a new sysfs entry under cpuidle states. desc - can be used by driver to
communicate to userspace any specific information about the state.
This helps in identifying the exact hardware C-states behind the ACPI C-state
definition.
Idea is to export this through powertop, which will help to map the C-state
reported by powertop to actual hardware C-state.
Signed-off-by: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'include/linux/cpuidle.h')
| -rw-r--r-- | include/linux/cpuidle.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h index 385d45b616db..6b72a4584086 100644 --- a/include/linux/cpuidle.h +++ b/include/linux/cpuidle.h @@ -19,6 +19,7 @@ #define CPUIDLE_STATE_MAX 8 #define CPUIDLE_NAME_LEN 16 +#define CPUIDLE_DESC_LEN 32 struct cpuidle_device; @@ -29,6 +30,7 @@ struct cpuidle_device; struct cpuidle_state { char name[CPUIDLE_NAME_LEN]; + char desc[CPUIDLE_DESC_LEN]; void *driver_data; unsigned int flags; |