[U-Boot] [PATCH] Nomadik: fix reset_timer()

[Alessandro Rubini <rubini-list@gnudd.com>]

From: Alessandro Rubini <rubini@unipv.it>

The timer decrements and READ_TIMER() negates the value read.
Writing 0 in reset_timer() is this wrong, as a readback before 400us
will read back 0 and will report 1780 seconds, so nand operations did
timeout.  This patch writes ~0 in reset_timer to prevent this.

Signed-off-by: Alessandro Rubini <rubini@unipv.it>
Acked-by: Andrea Gallo <andrea.gallo@stericsson.com>
Cc: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com>
---
 cpu/arm926ejs/nomadik/timer.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/cpu/arm926ejs/nomadik/timer.c b/cpu/arm926ejs/nomadik/timer.c
index 16067c9..2115b71 100644
--- a/cpu/arm926ejs/nomadik/timer.c
+++ b/cpu/arm926ejs/nomadik/timer.c
@@ -46,10 +46,10 @@ int timer_init(void)
 	return 0;
 }
 
-/* Restart counting from 0 */
+/* Restart counting from ~0 (can't be 0, since READ_TIMER negates) */
 void reset_timer(void)
 {
-	writel(0, CONFIG_SYS_TIMERBASE + MTU_LR(0)); /* Immediate effect */
+	writel(~0, CONFIG_SYS_TIMERBASE + MTU_LR(0)); /* Immediate effect */
 }
 
 /* Return how many HZ passed since "base" */
-- 
1.5.6.5