1#ifndef _ACPI_PMTMR_H_ 2#define _ACPI_PMTMR_H_ 3 4#include <linux/clocksource.h> 5 6/* Number of PMTMR ticks expected during calibration run */ 7#define PMTMR_TICKS_PER_SEC 3579545 8 9/* limit it to 24 bits */ 10#define ACPI_PM_MASK CLOCKSOURCE_MASK(24) 11 12/* Overrun value */ 13#define ACPI_PM_OVRRUN (1<<24) 14 15#ifdef CONFIG_X86_PM_TIMER 16 17extern u32 acpi_pm_read_verified(void); 18extern u32 pmtmr_ioport; 19 20static inline u32 acpi_pm_read_early(void) 21{ 22 if (!pmtmr_ioport) 23 return 0; 24 /* mask the output to 24 bits */ 25 return acpi_pm_read_verified() & ACPI_PM_MASK; 26} 27 28extern void pmtimer_wait(unsigned); 29 30#else 31 32static inline u32 acpi_pm_read_early(void) 33{ 34 return 0; 35} 36 37#endif 38 39#endif 40