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
28#else
29
30static inline u32 acpi_pm_read_early(void)
31{
32	return 0;
33}
34
35#endif
36
37#endif
38
39