1 /* SPDX-License-Identifier: GPL-2.0+ */
2 /*
3  *  linux/drivers/char/watchdog/omap_wdt.h
4  *
5  *  BRIEF MODULE DESCRIPTION
6  *      OMAP Watchdog timer register definitions
7  *
8  *  Copyright (C) 2004 Texas Instruments.
9  */
10 
11 #ifndef _OMAP_WATCHDOG_H
12 #define _OMAP_WATCHDOG_H
13 
14 #define OMAP_WATCHDOG_REV		(0x00)
15 #define OMAP_WATCHDOG_SYS_CONFIG	(0x10)
16 #define OMAP_WATCHDOG_STATUS		(0x14)
17 #define OMAP_WATCHDOG_CNTRL		(0x24)
18 #define OMAP_WATCHDOG_CRR		(0x28)
19 #define OMAP_WATCHDOG_LDR		(0x2c)
20 #define OMAP_WATCHDOG_TGR		(0x30)
21 #define OMAP_WATCHDOG_WPS		(0x34)
22 #define OMAP_WATCHDOG_SPR		(0x48)
23 
24 /* Using the prescaler, the OMAP watchdog could go for many
25  * months before firing.  These limits work without scaling,
26  * with the 60 second default assumed by most tools and docs.
27  */
28 #define TIMER_MARGIN_MAX	(24 * 60 * 60)	/* 1 day */
29 #define TIMER_MARGIN_DEFAULT	60	/* 60 secs */
30 #define TIMER_MARGIN_MIN	1
31 
32 #define PTV			0	/* prescale */
33 #define GET_WLDR_VAL(secs)	(0xffffffff - ((secs) * (32768/(1<<PTV))) + 1)
34 #define GET_WCCR_SECS(val)	((0xffffffff - (val) + 1) / (32768/(1<<PTV)))
35 
36 #endif				/* _OMAP_WATCHDOG_H */
37