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/devfreq.h>
8 #include <linux/spinlock.h>
9 #include <linux/ktime.h>
10 
11 struct devfreq;
12 struct thermal_cooling_device;
13 
14 struct lima_device;
15 
16 struct lima_devfreq {
17 	struct devfreq *devfreq;
18 	struct thermal_cooling_device *cooling;
19 	struct devfreq_simple_ondemand_data gov_data;
20 
21 	ktime_t busy_time;
22 	ktime_t idle_time;
23 	ktime_t time_last_update;
24 	int busy_count;
25 	/*
26 	 * Protect busy_time, idle_time, time_last_update and busy_count
27 	 * because these can be updated concurrently, for example by the GP
28 	 * and PP interrupts.
29 	 */
30 	spinlock_t lock;
31 };
32 
33 int lima_devfreq_init(struct lima_device *ldev);
34 void lima_devfreq_fini(struct lima_device *ldev);
35 
36 void lima_devfreq_record_busy(struct lima_devfreq *devfreq);
37 void lima_devfreq_record_idle(struct lima_devfreq *devfreq);
38 
39 int lima_devfreq_resume(struct lima_devfreq *devfreq);
40 int lima_devfreq_suspend(struct lima_devfreq *devfreq);
41 
42 #endif
43