Commit 6388d14e authored by Barry Song's avatar Barry Song Committed by Mike Frysinger

Blackfin: implement ndelay()

Signed-off-by: default avatarBarry Song <barry.song@analog.com>
Signed-off-by: default avatarMike Frysinger <vapier@gentoo.org>
parent 60ffdb36
...@@ -30,10 +30,22 @@ __asm__ __volatile__ ( ...@@ -30,10 +30,22 @@ __asm__ __volatile__ (
#define HZSCALE (268435456 / (1000000/HZ)) #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; 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 #endif
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