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