forked from mirrors/linux
56bd72e9cd
Provides the capability to register an external callback for the ACPI PM timer, which is called during the suspend and resume processes. Signed-off-by: Marek Maslanka <mmaslanka@google.com> Reviewed-by: Hans de Goede <hdegoede@redhat.com> Link: https://lore.kernel.org/r/20240812184150.1079924-1-mmaslanka@google.com Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
52 lines
1 KiB
C
52 lines
1 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _ACPI_PMTMR_H_
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#define _ACPI_PMTMR_H_
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#include <linux/clocksource.h>
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/* Number of PMTMR ticks expected during calibration run */
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#define PMTMR_TICKS_PER_SEC 3579545
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/* limit it to 24 bits */
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#define ACPI_PM_MASK CLOCKSOURCE_MASK(24)
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/* Overrun value */
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#define ACPI_PM_OVRRUN (1<<24)
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#ifdef CONFIG_X86_PM_TIMER
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extern u32 acpi_pm_read_verified(void);
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extern u32 pmtmr_ioport;
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static inline u32 acpi_pm_read_early(void)
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{
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if (!pmtmr_ioport)
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return 0;
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/* mask the output to 24 bits */
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return acpi_pm_read_verified() & ACPI_PM_MASK;
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}
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/**
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* Register callback for suspend and resume event
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*
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* @cb Callback triggered on suspend and resume
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* @data Data passed with the callback
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*/
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void acpi_pmtmr_register_suspend_resume_callback(void (*cb)(void *data, bool suspend), void *data);
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/**
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* Remove registered callback for suspend and resume event
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*/
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void acpi_pmtmr_unregister_suspend_resume_callback(void);
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#else
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static inline u32 acpi_pm_read_early(void)
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{
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return 0;
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}
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#endif
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#endif
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