Commit 6388d14e authored by Barry Song's avatar Barry Song Committed by Mike Frysinger
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Blackfin: implement ndelay() 



Signed-off-by: default avatarBarry Song <barry.song@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent 60ffdb36

arch/blackfin/include/asm/delay.h

+14 −2
Original line number Diff line number Diff line
@@ -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