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Merge tag 'nios2-v4.2' of git://git.rocketboards.org/linux-socfpga-next

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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
This commit is contained in:
Linus Torvalds
2015-07-03 12:22:49 -07:00
parent 9a3c284a6d a8955cc3a5
commit 31351f73ea
1 changed files with 13 additions and 2 deletions
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arch/nios2/kernel/time.c
+13 -2
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@@ -19,7 +19,9 @@
#include <linux/io.h> #include <linux/io.h>
#include <linux/slab.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_CONTROL_REG 4
#define ALTERA_TIMER_PERIODL_REG 8 #define ALTERA_TIMER_PERIODL_REG 8
#define ALTERA_TIMER_PERIODH_REG 12 #define ALTERA_TIMER_PERIODH_REG 12
@@ -304,7 +306,16 @@ void read_persistent_clock(struct timespec *ts)
void __init time_init(void) 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_init();
} }
CLOCKSOURCE_OF_DECLARE(nios2_timer, "altr,timer-1.0", nios2_time_init); CLOCKSOURCE_OF_DECLARE(nios2_timer, ALTR_TIMER_COMPATIBLE, nios2_time_init);