2 * linux/drivers/char/watchdog/omap_wdt.h
4 * BRIEF MODULE DESCRIPTION
5 * OMAP Watchdog timer register definitions
7 * Copyright (C) 2004 Texas Instruments.
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation; either version 2 of the License, or (at your
12 * option) any later version.
14 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
15 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
16 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
17 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
20 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
21 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 * You should have received a copy of the GNU General Public License along
26 * with this program; if not, write to the Free Software Foundation, Inc.,
27 * 675 Mass Ave, Cambridge, MA 02139, USA.
30 #ifndef _OMAP_WATCHDOG_H
31 #define _OMAP_WATCHDOG_H
33 #define OMAP_WATCHDOG_REV (0x00)
34 #define OMAP_WATCHDOG_SYS_CONFIG (0x10)
35 #define OMAP_WATCHDOG_STATUS (0x14)
36 #define OMAP_WATCHDOG_CNTRL (0x24)
37 #define OMAP_WATCHDOG_CRR (0x28)
38 #define OMAP_WATCHDOG_LDR (0x2c)
39 #define OMAP_WATCHDOG_TGR (0x30)
40 #define OMAP_WATCHDOG_WPS (0x34)
41 #define OMAP_WATCHDOG_SPR (0x48)
43 /* Using the prescaler, the OMAP watchdog could go for many
44 * months before firing. These limits work without scaling,
45 * with the 60 second default assumed by most tools and docs.
47 #define TIMER_MARGIN_MAX (24 * 60 * 60) /* 1 day */
48 #define TIMER_MARGIN_DEFAULT 60 /* 60 secs */
49 #define TIMER_MARGIN_MIN 1
51 #define PTV 0 /* prescale */
52 #define GET_WLDR_VAL(secs) (0xffffffff - ((secs) * (32768/(1<<PTV))) + 1)
53 #define GET_WCCR_SECS(val) ((0xffffffff - (val) + 1) / (32768/(1<<PTV)))
55 #endif /* _OMAP_WATCHDOG_H */