From 5204566e53a3c519e8795480d056635bc64b11cd Mon Sep 17 00:00:00 2001
From: Graeme Russ <graeme.russ@gmail.com>
Date: Sat, 24 Apr 2010 00:05:50 +1000
Subject: [PATCH] sc520: Allow boards to override udelay
If the board has a high precision mico-second timer, it maked sense to use
it instead of the on-chip one
Signed-off-by: Graeme Russ <graeme.russ@gmail.com>
---
arch/i386/cpu/sc520/sc520_timer.c | 4 ++++
arch/i386/include/asm/ic/sc520.h | 1 +
2 files changed, 5 insertions(+)
diff --git a/arch/i386/cpu/sc520/sc520_timer.c b/arch/i386/cpu/sc520/sc520_timer.c
index eca48e0c12..d5617e91f6 100644
--- a/arch/i386/cpu/sc520/sc520_timer.c
+++ b/arch/i386/cpu/sc520/sc520_timer.c
@@ -69,7 +69,11 @@ int timer_init(void)
return 0;
}
+/* Allow boards to override udelay implementation */
void __udelay(unsigned long usec)
+ __attribute__((weak, alias("sc520_udelay")));
+
+void sc520_udelay(unsigned long usec)
{
int m = 0;
long u;
diff --git a/arch/i386/include/asm/ic/sc520.h b/arch/i386/include/asm/ic/sc520.h
index 57c9904422..20384a4a8c 100644
--- a/arch/i386/include/asm/ic/sc520.h
+++ b/arch/i386/include/asm/ic/sc520.h
@@ -28,6 +28,7 @@
void init_sc520(void);
unsigned long init_sc520_dram(void);
+void sc520_udelay(unsigned long usec);
/* Memory mapped configuration registers */
typedef struct sc520_mmcr {
--
2.39.5