From a8955cc3a504e43ecd606e9f0d9bc25de240aacb Mon Sep 17 00:00:00 2001 From: Ley Foon Tan Date: Wed, 24 Jun 2015 17:52:44 +0800 Subject: [PATCH] nios2: check number of timer instances Display error message if number of timers is less than 2. Signed-off-by: Ley Foon Tan --- arch/nios2/kernel/time.c | 15 +++++++++++++-- 1 file 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 #include -#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); -- 2.39.5