Cregit: Linux 6.5: acpi

Contributors: 4
Author	Tokens	Token Proportion	Commits	Commit Proportion
Thomas Gleixner	63	77.78%	1	25.00%
John Stultz	11	13.58%	1	25.00%
Len Brown	6	7.41%	1	25.00%
Greg Kroah-Hartman	1	1.23%	1	25.00%
Total	81		4

/* SPDX-License-Identifier: GPL-2.0 */
#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

acpi_pmtmr.h