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