Commit | Line | Data |
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d2912cb1 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
022c03a2 MZ |
2 | /* |
3 | * linux/arch/arm/kernel/arch_timer.c | |
4 | * | |
5 | * Copyright (C) 2011 ARM Ltd. | |
6 | * All Rights Reserved | |
022c03a2 MZ |
7 | */ |
8 | #include <linux/init.h> | |
8a4da6e3 | 9 | #include <linux/types.h> |
fe7dc720 | 10 | #include <linux/errno.h> |
022c03a2 | 11 | |
56942fec | 12 | #include <asm/delay.h> |
05b1fd8b | 13 | #include <asm/arch_timer.h> |
022c03a2 | 14 | |
8a4da6e3 | 15 | #include <clocksource/arm_arch_timer.h> |
f48b5f12 | 16 | |
8a4da6e3 | 17 | static unsigned long arch_timer_read_counter_long(void) |
022c03a2 | 18 | { |
b8e24343 | 19 | return arch_timer_read_counter(); |
022c03a2 MZ |
20 | } |
21 | ||
8a4da6e3 | 22 | static struct delay_timer arch_delay_timer; |
273d16ad | 23 | |
8a4da6e3 | 24 | static void __init arch_timer_delay_timer_register(void) |
022c03a2 | 25 | { |
56942fec | 26 | /* Use the architected timer for the delay loop. */ |
8a4da6e3 MR |
27 | arch_delay_timer.read_current_timer = arch_timer_read_counter_long; |
28 | arch_delay_timer.freq = arch_timer_get_rate(); | |
56942fec | 29 | register_current_timer_delay(&arch_delay_timer); |
022c03a2 | 30 | } |
3f61c80e | 31 | |
0583fe47 | 32 | int __init arch_timer_arch_init(void) |
3f61c80e | 33 | { |
023796b9 RH |
34 | u32 arch_timer_rate = arch_timer_get_rate(); |
35 | ||
36 | if (arch_timer_rate == 0) | |
8a4da6e3 | 37 | return -ENXIO; |
3f61c80e | 38 | |
0583fe47 RH |
39 | arch_timer_delay_timer_register(); |
40 | ||
3f61c80e MZ |
41 | return 0; |
42 | } |