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authorLinus Torvalds <torvalds@linux-foundation.org>2015-07-03 12:22:49 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-07-03 12:22:49 -0700
commit31351f73ea37a5881fa24377ebc9e79487a77039 (patch)
tree190ddb8cb56fba4d726c13eb47acdad85ca1378c /arch/nios2/kernel
parent9a3c284a6dc894af066bbd6238a37996bb156c40 (diff)
parenta8955cc3a504e43ecd606e9f0d9bc25de240aacb (diff)
Merge tag 'nios2-v4.2' of git://git.rocketboards.org/linux-socfpga-next
Pull nios2 update from Ley Foon Tan: "Check number of timer instances" * tag 'nios2-v4.2' of git://git.rocketboards.org/linux-socfpga-next: nios2: check number of timer instances
Diffstat (limited to 'arch/nios2/kernel')
-rw-r--r--arch/nios2/kernel/time.c15
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/nios2/kernel/time.c b/arch/nios2/kernel/time.c
index be186a75f622..9e3cc8a40ee9 100644
--- a/arch/nios2/kernel/time.c
+++ b/arch/nios2/kernel/time.c
@@ -19,7 +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
@@ -304,7 +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);