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>
diff --git a/arch/i386/cpu/sc520/sc520_timer.c b/arch/i386/cpu/sc520/sc520_timer.c
index eca48e0..d5617e9 100644
--- a/arch/i386/cpu/sc520/sc520_timer.c
+++ b/arch/i386/cpu/sc520/sc520_timer.c
@@ -69,7 +69,11 @@
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 57c9904..20384a4 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 {