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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