xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

ACPI, cpuidle: Clarify C-state description in sysfs

Browse Source 
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>
This commit is contained in:
Venkatesh Pallipadi
2008-02-11 17:46:31 -08:00
committed by Len Brown
parent e760e716d4
commit 4fcb2fcd4d
6 changed files with 34 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

9
include/acpi/processor.h
View File

@@ -32,9 +32,11 @@
#define DOMAIN_COORD_TYPE_SW_ANY 0xfd
#define DOMAIN_COORD_TYPE_HW_ALL 0xfe
#define ACPI_CSTATE_SYSTEMIO (0)
#define ACPI_CSTATE_FFH (1)
#define ACPI_CSTATE_HALT (2)
#define ACPI_CSTATE_SYSTEMIO 0
#define ACPI_CSTATE_FFH 1
#define ACPI_CSTATE_HALT 2
#define ACPI_CX_DESC_LEN 32
/* Power Management */
@@ -74,6 +76,7 @@ struct acpi_processor_cx {
u64 time;
struct acpi_processor_cx_policy promotion;
struct acpi_processor_cx_policy demotion;
char desc[ACPI_CX_DESC_LEN];
};
struct acpi_processor_power {