Cregit: Linux 6.9: i8253.h

Contributors: 8
Author	Tokens	Token Proportion	Commits	Commit Proportion
Ralf Baechle	20	31.25%	4	26.67%
Thomas Gleixner	15	23.44%	4	26.67%
Alan Cox	13	20.31%	1	6.67%
Zwane Mwaikambo	4	6.25%	1	6.67%
Michael Kelley	4	6.25%	1	6.67%
Russell King	3	4.69%	1	6.67%
Linus Torvalds (pre-git)	3	4.69%	2	13.33%
Andrew Morton	2	3.12%	1	6.67%
Total	64		15

/*
 * This file is subject to the terms and conditions of the GNU General Public
 * License.  See the file "COPYING" in the main directory of this archive
 * for more details.
 *
 *  Machine specific IO port address definition for generic.
 *  Written by Osamu Tomita <tomita@cinet.co.jp>
 */
#ifndef __LINUX_I8253_H
#define __LINUX_I8253_H

#include <linux/param.h>
#include <linux/spinlock.h>
#include <linux/timex.h>

/* i8253A PIT registers */
#define PIT_MODE	0x43
#define PIT_CH0		0x40
#define PIT_CH2		0x42

#define PIT_LATCH	((PIT_TICK_RATE + HZ/2) / HZ)

extern raw_spinlock_t i8253_lock;
extern bool i8253_clear_counter_on_shutdown;
extern struct clock_event_device i8253_clockevent;
extern void clockevent_i8253_init(bool oneshot);

extern void setup_pit_timer(void);

#endif /* __LINUX_I8253_H */