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authorRalf Baechle <ralf@linux-mips.org>2007-11-11 17:24:46 +0000
committerRalf Baechle <ralf@linux-mips.org>2007-11-15 23:21:50 +0000
commit622477533d3dc24845c847f386533f3c0e6a1be6 (patch)
tree24503bc9ebe8496566991c5a7a689b4115065e7b
parent89becf5c0d9019f4f9300840f08a98ee33d57d37 (diff)
downloadlinux-stericsson-622477533d3dc24845c847f386533f3c0e6a1be6.tar.gz
[MIPS] Sibyte: Increase minimum oneshot timer interval to two ticks.
For the old minimum of a single tick a value of zero would be programmed into the init value register which in the BCM1250/BCM1125/BCM1125H User Manual in the Timer Special Cases section is documented to have UNPREDICTABLE effect. Observable sympthoms of this bug were hangs of several seconds on the console during bootup and later if both dyntick and highres timer options were activated. In theory contiguous mode of the timers is also affected but in an act of hopeless lack of realism I'll assume nobody will ever configure a KERNEL for HZ > 500kHz but if so I leave that to evolution to sort out. Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
-rw-r--r--arch/mips/kernel/cevt-bcm1480.c2
-rw-r--r--arch/mips/kernel/cevt-sb1250.c2
2 files changed, 2 insertions, 2 deletions
diff --git a/arch/mips/kernel/cevt-bcm1480.c b/arch/mips/kernel/cevt-bcm1480.c
index f6fcc62ade3a..e54410e5a2cd 100644
--- a/arch/mips/kernel/cevt-bcm1480.c
+++ b/arch/mips/kernel/cevt-bcm1480.c
@@ -122,7 +122,7 @@ void __cpuinit sb1480_clockevent_init(void)
CLOCK_EVT_FEAT_ONESHOT;
clockevent_set_clock(cd, V_SCD_TIMER_FREQ);
cd->max_delta_ns = clockevent_delta2ns(0x7fffff, cd);
- cd->min_delta_ns = clockevent_delta2ns(1, cd);
+ cd->min_delta_ns = clockevent_delta2ns(2, cd);
cd->rating = 200;
cd->irq = irq;
cd->cpumask = cpumask_of_cpu(cpu);
diff --git a/arch/mips/kernel/cevt-sb1250.c b/arch/mips/kernel/cevt-sb1250.c
index 194e0f726fe8..8fbb05537680 100644
--- a/arch/mips/kernel/cevt-sb1250.c
+++ b/arch/mips/kernel/cevt-sb1250.c
@@ -121,7 +121,7 @@ void __cpuinit sb1250_clockevent_init(void)
CLOCK_EVT_FEAT_ONESHOT;
clockevent_set_clock(cd, V_SCD_TIMER_FREQ);
cd->max_delta_ns = clockevent_delta2ns(0x7fffff, cd);
- cd->min_delta_ns = clockevent_delta2ns(1, cd);
+ cd->min_delta_ns = clockevent_delta2ns(2, cd);
cd->rating = 200;
cd->irq = irq;
cd->cpumask = cpumask_of_cpu(cpu);