diff options
Diffstat (limited to 'arch/nios2/kernel/time.c')
| -rw-r--r-- | arch/nios2/kernel/time.c | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/arch/nios2/kernel/time.c b/arch/nios2/kernel/time.c index 7f4547418ee1..9e3cc8a40ee9 100644 --- a/arch/nios2/kernel/time.c +++ b/arch/nios2/kernel/time.c @@ -8,6 +8,7 @@ * for more details. */ +#include <linux/export.h> #include <linux/interrupt.h> #include <linux/clockchips.h> #include <linux/clocksource.h> @@ -18,7 +19,9 @@ #include <linux/io.h> #include <linux/slab.h> -#define ALTERA_TIMER_STATUS_REG 0 +#define ALTR_TIMER_COMPATIBLE "altr,timer-1.0" + +#define ALTERA_TIMER_STATUS_REG 0 #define ALTERA_TIMER_CONTROL_REG 4 #define ALTERA_TIMER_PERIODL_REG 8 #define ALTERA_TIMER_PERIODH_REG 12 @@ -106,6 +109,7 @@ cycles_t get_cycles(void) { return nios2_timer_read(&nios2_cs.cs); } +EXPORT_SYMBOL(get_cycles); static void nios2_timer_start(struct nios2_timer *timer) { @@ -302,7 +306,16 @@ void read_persistent_clock(struct timespec *ts) void __init time_init(void) { + struct device_node *np; + int count = 0; + + for_each_compatible_node(np, NULL, ALTR_TIMER_COMPATIBLE) + count++; + + if (count < 2) + panic("%d timer is found, it needs 2 timers in system\n", count); + clocksource_of_init(); } -CLOCKSOURCE_OF_DECLARE(nios2_timer, "altr,timer-1.0", nios2_time_init); +CLOCKSOURCE_OF_DECLARE(nios2_timer, ALTR_TIMER_COMPATIBLE, nios2_time_init); |