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