1 /* SPDX-License-Identifier: GPL-2.0 */ <<
2 #ifndef _ACPI_PMTMR_H_ 1 #ifndef _ACPI_PMTMR_H_
3 #define _ACPI_PMTMR_H_ 2 #define _ACPI_PMTMR_H_
4 3
5 #include <linux/clocksource.h> 4 #include <linux/clocksource.h>
6 5
7 /* Number of PMTMR ticks expected during calib 6 /* Number of PMTMR ticks expected during calibration run */
8 #define PMTMR_TICKS_PER_SEC 3579545 7 #define PMTMR_TICKS_PER_SEC 3579545
9 8
10 /* limit it to 24 bits */ 9 /* limit it to 24 bits */
11 #define ACPI_PM_MASK CLOCKSOURCE_MASK(24) 10 #define ACPI_PM_MASK CLOCKSOURCE_MASK(24)
12 11
13 /* Overrun value */ 12 /* Overrun value */
14 #define ACPI_PM_OVRRUN (1<<24) 13 #define ACPI_PM_OVRRUN (1<<24)
15 14
16 #ifdef CONFIG_X86_PM_TIMER 15 #ifdef CONFIG_X86_PM_TIMER
17 16
18 extern u32 acpi_pm_read_verified(void); 17 extern u32 acpi_pm_read_verified(void);
19 extern u32 pmtmr_ioport; 18 extern u32 pmtmr_ioport;
20 19
21 static inline u32 acpi_pm_read_early(void) 20 static inline u32 acpi_pm_read_early(void)
22 { 21 {
23 if (!pmtmr_ioport) 22 if (!pmtmr_ioport)
24 return 0; 23 return 0;
25 /* mask the output to 24 bits */ 24 /* mask the output to 24 bits */
26 return acpi_pm_read_verified() & ACPI_ 25 return acpi_pm_read_verified() & ACPI_PM_MASK;
27 } 26 }
28 <<
29 /** <<
30 * Register callback for suspend and resume ev <<
31 * <<
32 * @cb Callback triggered on suspend and resum <<
33 * @data Data passed with the callback <<
34 */ <<
35 void acpi_pmtmr_register_suspend_resume_callba <<
36 <<
37 /** <<
38 * Remove registered callback for suspend and <<
39 */ <<
40 void acpi_pmtmr_unregister_suspend_resume_call <<
41 27
42 #else 28 #else
43 29
44 static inline u32 acpi_pm_read_early(void) 30 static inline u32 acpi_pm_read_early(void)
45 { 31 {
46 return 0; 32 return 0;
47 } 33 }
48 34
49 #endif 35 #endif
50 36
51 #endif 37 #endif
52 38
53 39
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