40 lines
674 B
C
Executable file
40 lines
674 B
C
Executable file
/* 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
|
|
|