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authorWolfgang Denk <wd@pollux.denx.de>2005-10-05 02:02:25 +0200
committerWolfgang Denk <wd@pollux.denx.de>2005-10-05 02:02:25 +0200
commit3b9dfddfd8fc7d6639e6d746774ca7af77dfd881 (patch)
treea2552b0b24135f17e0110d7d74823b6db2e71018
parent645da510979b839196567506e8b2f33ba4cc8140 (diff)
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Set the AT91RM9200 clock to synchronous mode
Patch by Anders Larsen, 29 Apr 2005
-rw-r--r--CHANGELOG3
-rw-r--r--cpu/arm920t/at91rm9200/lowlevel_init.S5
2 files changed, 8 insertions, 0 deletions
diff --git a/CHANGELOG b/CHANGELOG
index 53afe66afb..8c63cdeb4c 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -2,6 +2,9 @@
Changes for U-Boot 1.1.4:
======================================================================
+* Set the AT91RM9200 clock to synchronous mode
+ Patch by Anders Larsen, 29 Apr 2005
+
* Add support for Cogent csb637
Patch by Anders Larsen, 29 Apr 2005
diff --git a/cpu/arm920t/at91rm9200/lowlevel_init.S b/cpu/arm920t/at91rm9200/lowlevel_init.S
index 05887adc0c..6941d42dff 100644
--- a/cpu/arm920t/at91rm9200/lowlevel_init.S
+++ b/cpu/arm920t/at91rm9200/lowlevel_init.S
@@ -123,6 +123,11 @@ LoopOsc:
cmp r2, r0
bne 2b
+ /* switch from FastBus to Synchronous clock mode */
+ mrc p15, 0, r0, c1, c0, 0
+ orr r0, r0, #0x40000000 @ set bit 30 (nF) notFastBus
+ mcr p15, 0, r0, c1, c0, 0
+
/* everything is fine now */
mov pc, lr