1 /* SPDX-License-Identifier: GPL-2.0 */
2 /* Copyright 2020 Martin Blumenstingl <martin.blumenstingl@googlemail.com> */
3 
4 #ifndef __LIMA_DEVFREQ_H__
5 #define __LIMA_DEVFREQ_H__
6 
7 #include <linux/spinlock.h>
8 #include <linux/ktime.h>
9 
10 struct devfreq;
11 struct opp_table;
12 struct thermal_cooling_device;
13 
14 struct lima_device;
15 
16 struct lima_devfreq {
17 	struct devfreq *devfreq;
18 	struct opp_table *clkname_opp_table;
19 	struct opp_table *regulators_opp_table;
20 	struct thermal_cooling_device *cooling;
21 	bool opp_of_table_added;
22 
23 	ktime_t busy_time;
24 	ktime_t idle_time;
25 	ktime_t time_last_update;
26 	int busy_count;
27 	/*
28 	 * Protect busy_time, idle_time, time_last_update and busy_count
29 	 * because these can be updated concurrently, for example by the GP
30 	 * and PP interrupts.
31 	 */
32 	spinlock_t lock;
33 };
34 
35 int lima_devfreq_init(struct lima_device *ldev);
36 void lima_devfreq_fini(struct lima_device *ldev);
37 
38 void lima_devfreq_record_busy(struct lima_devfreq *devfreq);
39 void lima_devfreq_record_idle(struct lima_devfreq *devfreq);
40 
41 int lima_devfreq_resume(struct lima_devfreq *devfreq);
42 int lima_devfreq_suspend(struct lima_devfreq *devfreq);
43 
44 #endif
45