Gitweb:
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=26c671c6b7c02bc9f9c42331e6ecbeccdf67164c
Commit: 26c671c6b7c02bc9f9c42331e6ecbeccdf67164c
Parent: 3945a567d0c1d6721994a88f58f028c27d8249d2
Author: Uwe Kleine-König <[EMAIL PROTECTED]>
AuthorDate: Thu Jul 19 22:13:05 2007 +0100
Committer: Russell King <[EMAIL PROTECTED]>
CommitDate: Fri Jul 20 10:01:37 2007 +0100
[ARM] 4493/1: ns9xxx: disable a non-reloading timer before ack'ing its irq
The HRM states that is must be done this way ...
Signed-off-by: Uwe Kleine-König <[EMAIL PROTECTED]>
Signed-off-by: Russell King <[EMAIL PROTECTED]>
---
arch/arm/mach-ns9xxx/irq.c | 9 +++++++++
1 files changed, 9 insertions(+), 0 deletions(-)
diff --git a/arch/arm/mach-ns9xxx/irq.c b/arch/arm/mach-ns9xxx/irq.c
index cd8f836..b8c7b00 100644
--- a/arch/arm/mach-ns9xxx/irq.c
+++ b/arch/arm/mach-ns9xxx/irq.c
@@ -21,6 +21,15 @@ static void ns9xxx_ack_irq_timer(unsigned int irq)
{
u32 tc = SYS_TC(irq - IRQ_TIMER0);
+ /*
+ * If the timer is programmed to halt on terminal count, the
+ * timer must be disabled before clearing the interrupt.
+ */
+ if (REGGET(tc, SYS_TCx, REN) == 0) {
+ REGSET(tc, SYS_TCx, TEN, DIS);
+ SYS_TC(irq - IRQ_TIMER0) = tc;
+ }
+
REGSET(tc, SYS_TCx, INTC, SET);
SYS_TC(irq - IRQ_TIMER0) = tc;
-
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