Commit | Line | Data |
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022c03a2 MZ |
1 | /* |
2 | * linux/arch/arm/kernel/arch_timer.c | |
3 | * | |
4 | * Copyright (C) 2011 ARM Ltd. | |
5 | * All Rights Reserved | |
6 | * | |
7 | * This program is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU General Public License version 2 as | |
9 | * published by the Free Software Foundation. | |
10 | */ | |
11 | #include <linux/init.h> | |
8a4da6e3 | 12 | #include <linux/types.h> |
fe7dc720 | 13 | #include <linux/errno.h> |
022c03a2 | 14 | |
56942fec | 15 | #include <asm/delay.h> |
022c03a2 | 16 | |
8a4da6e3 | 17 | #include <clocksource/arm_arch_timer.h> |
f48b5f12 | 18 | |
8a4da6e3 | 19 | static unsigned long arch_timer_read_counter_long(void) |
022c03a2 | 20 | { |
b8e24343 | 21 | return arch_timer_read_counter(); |
022c03a2 MZ |
22 | } |
23 | ||
8a4da6e3 | 24 | static struct delay_timer arch_delay_timer; |
273d16ad | 25 | |
8a4da6e3 | 26 | static void __init arch_timer_delay_timer_register(void) |
022c03a2 | 27 | { |
56942fec | 28 | /* Use the architected timer for the delay loop. */ |
8a4da6e3 MR |
29 | arch_delay_timer.read_current_timer = arch_timer_read_counter_long; |
30 | arch_delay_timer.freq = arch_timer_get_rate(); | |
56942fec | 31 | register_current_timer_delay(&arch_delay_timer); |
022c03a2 | 32 | } |
3f61c80e | 33 | |
0583fe47 | 34 | int __init arch_timer_arch_init(void) |
3f61c80e | 35 | { |
023796b9 RH |
36 | u32 arch_timer_rate = arch_timer_get_rate(); |
37 | ||
38 | if (arch_timer_rate == 0) | |
8a4da6e3 | 39 | return -ENXIO; |
3f61c80e | 40 | |
0583fe47 RH |
41 | arch_timer_delay_timer_register(); |
42 | ||
3f61c80e MZ |
43 | return 0; |
44 | } |