Merge commit 'ed30f24e8d07d30aa3e69d1f508f4d7bd2e8ea14' of git://git.linaro.org/landi...
[firefly-linux-kernel-4.4.55.git] / include / clocksource / arm_arch_timer.h
1 /*
2  * Copyright (C) 2012 ARM Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License version 2 as
6  * published by the Free Software Foundation.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
15  */
16 #ifndef __CLKSOURCE_ARM_ARCH_TIMER_H
17 #define __CLKSOURCE_ARM_ARCH_TIMER_H
18
19 #include <linux/clocksource.h>
20 #include <linux/types.h>
21
22 #define ARCH_TIMER_CTRL_ENABLE          (1 << 0)
23 #define ARCH_TIMER_CTRL_IT_MASK         (1 << 1)
24 #define ARCH_TIMER_CTRL_IT_STAT         (1 << 2)
25
26 #define ARCH_TIMER_REG_CTRL             0
27 #define ARCH_TIMER_REG_TVAL             1
28
29 #define ARCH_TIMER_PHYS_ACCESS          0
30 #define ARCH_TIMER_VIRT_ACCESS          1
31
32 #ifdef CONFIG_ARM_ARCH_TIMER
33
34 extern u32 arch_timer_get_rate(void);
35 extern u64 (*arch_timer_read_counter)(void);
36 extern struct timecounter *arch_timer_get_timecounter(void);
37
38 #else
39
40 static inline u32 arch_timer_get_rate(void)
41 {
42         return 0;
43 }
44
45 static inline u64 arch_timer_read_counter(void)
46 {
47         return 0;
48 }
49
50 static inline struct timecounter *arch_timer_get_timecounter(void)
51 {
52         return NULL;
53 }
54
55 #endif
56
57 #endif