| * Precise Delay Loops for avr32 |
| * Copyright (C) 1993 Linus Torvalds |
| * Copyright (C) 1997 Martin Mares <mj@atrey.karlin.mff.cuni.cz> |
| * Copyright (C) 2005-2006 Atmel Corporation |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License version 2 as |
| * published by the Free Software Foundation. |
| #include <linux/module.h> |
| #include <asm/processor.h> |
| int read_current_timer(unsigned long *timer_value) |
| *timer_value = sysreg_read(COUNT); |
| void __delay(unsigned long loops) |
| bclock = sysreg_read(COUNT); |
| now = sysreg_read(COUNT); |
| } while ((now - bclock) < loops); |
| inline void __const_udelay(unsigned long xloops) |
| unsigned long long loops; |
| : "r"(current_cpu_data.loops_per_jiffy * HZ), "r"(xloops)); |
| void __udelay(unsigned long usecs) |
| __const_udelay(usecs * 0x000010c7); /* 2**32 / 1000000 (rounded up) */ |
| void __ndelay(unsigned long nsecs) |
| __const_udelay(nsecs * 0x00005); /* 2**32 / 1000000000 (rounded up) */ |