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39 lines
674 B
39 lines
674 B
/* 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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#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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