[U-Boot-Users] Resubmit : [PATCH] Correct ARM Versatile Timer Initialization

Gururaja Hebbar K R gururajakr at sanyo.co.in
Mon Aug 4 03:00:28 CEST 2008


- According to ARM Dual-Timer Module (SP804) TRM (ARM DDI0271), 
 -- Timer Value Register @ TIMER Base + 4 is Read-only. 
 -- Prescale Value (Bits 3-2 of TIMER Control register) 
	can only be one of 00,01,10. 11 is undefined.

Signed-off-by: Gururaja Hebbar <gururajakr at sanyo.co.in>
---
 cpu/arm926ejs/versatile/timer.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)

diff --git a/cpu/arm926ejs/versatile/timer.c b/cpu/arm926ejs/versatile/timer.c
index 32872d2..9659b67 100644
--- a/cpu/arm926ejs/versatile/timer.c
+++ b/cpu/arm926ejs/versatile/timer.c
@@ -50,8 +50,7 @@ static ulong lastdec;
 int timer_init (void)
 {
 	*(volatile ulong *)(CFG_TIMERBASE + 0) = CFG_TIMER_RELOAD;	/* TimerLoad */
-	*(volatile ulong *)(CFG_TIMERBASE + 4) = CFG_TIMER_RELOAD;	/* TimerValue */
-	*(volatile ulong *)(CFG_TIMERBASE + 8) = 0x8C;
+	*(volatile ulong *)(CFG_TIMERBASE + 8) = 0x80;
 
 	/* init the timestamp and lastdec value */
 	reset_timer_masked();
-- 
1.5.6.4




More information about the U-Boot mailing list