From: Barry Song <barry.song@analog.com>
Date: Thu, 21 Jan 2010 07:20:44 +0000 (+0000)
Subject: Blackfin: implement ndelay()
X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=6388d14eb2dd3af655cee28ca2a1c56881e63e56;p=linux-beck.git

Blackfin: implement ndelay()

Signed-off-by: Barry Song <barry.song@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
---

diff --git a/arch/blackfin/include/asm/delay.h b/arch/blackfin/include/asm/delay.h
index c31f91cc1d5d..171d8deb04a5 100644
--- a/arch/blackfin/include/asm/delay.h
+++ b/arch/blackfin/include/asm/delay.h
@@ -30,10 +30,22 @@ __asm__ __volatile__ (
 
 #define	HZSCALE		(268435456 / (1000000/HZ))
 
-static inline void udelay(unsigned long usecs)
+static inline unsigned long __to_delay(unsigned long scale)
 {
 	extern unsigned long loops_per_jiffy;
-	__delay((((usecs * HZSCALE) >> 11) * (loops_per_jiffy >> 11)) >> 6);
+	return (((scale * HZSCALE) >> 11) * (loops_per_jiffy >> 11)) >> 6;
+}
+
+static inline void udelay(unsigned long usecs)
+{
+	__delay(__to_delay(usecs));
 }
 
+static inline void ndelay(unsigned long nsecs)
+{
+	__delay(__to_delay(1) * nsecs / 1000);
+}
+
+#define ndelay ndelay
+
 #endif