From 4fcb2fcd4d0678b8ae103d257dcb28074cbfc7fa Mon Sep 17 00:00:00 2001 From: Venkatesh Pallipadi Date: Mon, 11 Feb 2008 17:46:31 -0800 Subject: 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 Signed-off-by: Len Brown --- include/acpi/processor.h | 9 ++++++--- 1 file changed, 6 insertions(+), 3 deletions(-) (limited to 'include/acpi') diff --git a/include/acpi/processor.h b/include/acpi/processor.h index cdc8004cfd1..06480bcabfd 100644 --- a/include/acpi/processor.h +++ b/include/acpi/processor.h @@ -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 { -- cgit v1.2.3