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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/blackfin/include/asm/delay.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/blackfin/include/asm/delay.h')
-rw-r--r-- | arch/blackfin/include/asm/delay.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/blackfin/include/asm/delay.h b/arch/blackfin/include/asm/delay.h new file mode 100644 index 00000000..171d8deb --- /dev/null +++ b/arch/blackfin/include/asm/delay.h @@ -0,0 +1,51 @@ +/* + * delay.h - delay functions + * + * Copyright (c) 2004-2007 Analog Devices Inc. + * + * Licensed under the GPL-2 or later. + */ + +#ifndef __ASM_DELAY_H__ +#define __ASM_DELAY_H__ + +#include <mach/anomaly.h> + +static inline void __delay(unsigned long loops) +{ +__asm__ __volatile__ ( + "LSETUP(1f, 1f) LC0 = %0;" + "1: NOP;" + : + : "a" (loops) + : "LT0", "LB0", "LC0" + ); +} + +#include <linux/param.h> /* needed for HZ */ + +/* + * close approximation borrowed from m68knommu to avoid 64-bit math + */ + +#define HZSCALE (268435456 / (1000000/HZ)) + +static inline unsigned long __to_delay(unsigned long scale) +{ + extern unsigned long loops_per_jiffy; + 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 |