#ifndef _ACPI_PMTMR_H_ | |
#define _ACPI_PMTMR_H_ | |
#include <linux/clocksource.h> | |
/* Number of PMTMR ticks expected during calibration run */ | |
#define PMTMR_TICKS_PER_SEC 3579545 | |
/* limit it to 24 bits */ | |
#define ACPI_PM_MASK CLOCKSOURCE_MASK(24) | |
/* Overrun value */ | |
#define ACPI_PM_OVRRUN (1<<24) | |
#ifdef CONFIG_X86_PM_TIMER | |
extern u32 acpi_pm_read_verified(void); | |
extern u32 pmtmr_ioport; | |
static inline u32 acpi_pm_read_early(void) | |
{ | |
if (!pmtmr_ioport) | |
return 0; | |
/* mask the output to 24 bits */ | |
return acpi_pm_read_verified() & ACPI_PM_MASK; | |
} | |
#else | |
static inline u32 acpi_pm_read_early(void) | |
{ | |
return 0; | |
} | |
#endif | |
#endif | |