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/* 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