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authorScott McNutt <smcnutt@psyent.com>2010-03-30 20:23:04 -0400
committerScott McNutt <smcnutt@psyent.com>2010-04-02 12:28:41 -0400
commit3a89a91a10fed545af458418e63d911953a9849c (patch)
treedbb8cf6ce9e3ca0b1d86b815edcc290e25b2f3e3 /include/configs/EP1C20.h
parent3ea0037f2337de692b5fd2b6a4449db1de3067a2 (diff)
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nios2: Set CONFIG_SYS_HZ to 1000 all nios2 boards.
CONFIG_SYS_HZ was being calculated (incorrectly) in nios2 configuration headers. Updated comments to accurately describe timebase macros. Signed-off-by: Scott McNutt <smcnutt@psyent.com>
Diffstat (limited to 'include/configs/EP1C20.h')
-rw-r--r--include/configs/EP1C20.h14
1 files changed, 8 insertions, 6 deletions
diff --git a/include/configs/EP1C20.h b/include/configs/EP1C20.h
index dc82e54..3920d35 100644
--- a/include/configs/EP1C20.h
+++ b/include/configs/EP1C20.h
@@ -124,14 +124,16 @@
* TIMEBASE --
*
* The high res timer defaults to 1 msec. Since it includes the period
- * registers, we can slow it down to 10 msec using TMRCNT. If the default
- * period is acceptable, TMRCNT can be left undefined.
+ * registers, the interrupt frequency can be reduced using TMRCNT.
+ * If the default period is acceptable, TMRCNT can be left undefined.
+ * TMRMS represents the desired mecs per tick (msecs per interrupt).
*----------------------------------------------------------------------*/
+#define CONFIG_SYS_HZ 1000 /* Always 1000 */
#define CONFIG_SYS_NIOS_TMRBASE 0x02120820 /* Tick timer base addr */
-#define CONFIG_SYS_NIOS_TMRIRQ 3 /* Timer IRQ num */
-#define CONFIG_SYS_NIOS_TMRMS 10 /* 10 msec per tick */
-#define CONFIG_SYS_NIOS_TMRCNT (CONFIG_SYS_NIOS_TMRMS * (CONFIG_SYS_CLK_FREQ/1000))
-#define CONFIG_SYS_HZ (CONFIG_SYS_CLK_FREQ/(CONFIG_SYS_NIOS_TMRCNT + 1))
+#define CONFIG_SYS_NIOS_TMRIRQ 3 /* Timer IRQ num */
+#define CONFIG_SYS_NIOS_TMRMS 10 /* Desired period (msec)*/
+#define CONFIG_SYS_NIOS_TMRCNT \
+ (CONFIG_SYS_NIOS_TMRMS * (CONFIG_SYS_CLK_FREQ/1000))
/*------------------------------------------------------------------------
* STATUS LED -- Provides a simple blinking led. For Nios2 each board