[linux-2.6-block.git] / include / linux / acpi_pmtmr.h

/* 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;
}

/**
 * Register callback for suspend and resume event
 *
 * @cb Callback triggered on suspend and resume
 * @data Data passed with the callback
 */
void acpi_pmtmr_register_suspend_resume_callback(void (*cb)(void *data, bool suspend), void *data);

/**
 * Remove registered callback for suspend and resume event
 */
void acpi_pmtmr_unregister_suspend_resume_callback(void);

#else

static inline u32 acpi_pm_read_early(void)
{
	return 0;
}

#endif

#endif
Commit	Line	Data
	1	/* SPDX-License-Identifier: GPL-2.0 */
	2	#ifndef _ACPI_PMTMR_H_
	3	#define _ACPI_PMTMR_H_
	4
	5	#include <linux/clocksource.h>
	6
	7	/* Number of PMTMR ticks expected during calibration run */
	8	#define PMTMR_TICKS_PER_SEC 3579545
	9
	10	/* limit it to 24 bits */
	11	#define ACPI_PM_MASK CLOCKSOURCE_MASK(24)
	12
	13	/* Overrun value */
	14	#define ACPI_PM_OVRRUN (1<<24)
	15
	16	#ifdef CONFIG_X86_PM_TIMER
	17
	18	extern u32 acpi_pm_read_verified(void);
	19	extern u32 pmtmr_ioport;
	20
	21	static inline u32 acpi_pm_read_early(void)
	22	{
	23	if (!pmtmr_ioport)
	24	return 0;
	25	/* mask the output to 24 bits */
	26	return acpi_pm_read_verified() & ACPI_PM_MASK;
	27	}
	28
	29	/**
	30	* Register callback for suspend and resume event
	31	*
	32	* @cb Callback triggered on suspend and resume
	33	* @data Data passed with the callback
	34	*/
	35	void acpi_pmtmr_register_suspend_resume_callback(void (cb)(void data, bool suspend), void *data);
	36
	37	/**
	38	* Remove registered callback for suspend and resume event
	39	*/
	40	void acpi_pmtmr_unregister_suspend_resume_callback(void);
	41
	42	#else
	43
	44	static inline u32 acpi_pm_read_early(void)
	45	{
	46	return 0;
	47	}
	48
	49	#endif
	50
	51	#endif
	52