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| author | Ley Foon Tan <lftan@altera.com> | 2015-06-24 17:52:44 +0800 |
|---|---|---|
| committer | Ley Foon Tan <lftan@altera.com> | 2015-06-24 17:52:44 +0800 |
| commit | a8955cc3a504e43ecd606e9f0d9bc25de240aacb (patch) | |
| tree | e3cd5caf38fd2b6e6b13e08ca1a10132fcbde6c6 /arch/nios2 | |
| parent | b953c0d234bc72e8489d3bf51a276c5c4ec85345 (diff) | |
| download | lwn-a8955cc3a504e43ecd606e9f0d9bc25de240aacb.tar.gz lwn-a8955cc3a504e43ecd606e9f0d9bc25de240aacb.zip | |
nios2: check number of timer instances
Display error message if number of timers is less than 2.
Signed-off-by: Ley Foon Tan <lftan@altera.com>
Diffstat (limited to 'arch/nios2')
| -rw-r--r-- | arch/nios2/kernel/time.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/arch/nios2/kernel/time.c b/arch/nios2/kernel/time.c index 7f4547418ee1..bea8839d56d8 100644 --- a/arch/nios2/kernel/time.c +++ b/arch/nios2/kernel/time.c @@ -18,7 +18,9 @@ #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 @@ -302,7 +304,16 @@ 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); |