[PATCH] OMAP: Add Watchdog driver support

Add Texas Instruments (TI) OMAP1/2 (http://www.ti.com/omap) based
processors, like OMAP1610/1710/242x.

[akpm@osdl.org: cleanups]
Cc: <gdavis@mvista.com>
Cc: "Komal Shah" <komal_shah802003@yahoo.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 64 insertions, 0 deletions

diff --git a/drivers/char/watchdog/omap_wdt.h b/drivers/char/watchdog/omap_wdt.h
new file mode 100644
index 000000000000..52a532a5114a
--- /dev/null
+++ b/drivers/char/watchdog/omap_wdt.h
@@ -0,0 +1,64 @@
+/*
+ *  linux/drivers/char/watchdog/omap_wdt.h
+ *
+ *  BRIEF MODULE DESCRIPTION
+ *      OMAP Watchdog timer register definitions
+ *
+ *  Copyright (C) 2004 Texas Instruments.
+ *
+ *  This program is free software; you can redistribute  it and/or modify it
+ *  under  the terms of  the GNU General  Public License as published by the
+ *  Free Software Foundation;  either version 2 of the  License, or (at your
+ *  option) any later version.
+ *
+ *  THIS  SOFTWARE  IS PROVIDED   ``AS  IS'' AND   ANY  EXPRESS OR IMPLIED
+ *  WARRANTIES,   INCLUDING, BUT NOT  LIMITED  TO, THE IMPLIED WARRANTIES OF
+ *  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN
+ *  NO  EVENT  SHALL   THE AUTHOR  BE    LIABLE FOR ANY   DIRECT, INDIRECT,
+ *  INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
+ *  NOT LIMITED   TO, PROCUREMENT OF  SUBSTITUTE GOODS  OR SERVICES; LOSS OF
+ *  USE, DATA,  OR PROFITS; OR  BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+ *  ANY THEORY OF LIABILITY, WHETHER IN  CONTRACT, STRICT LIABILITY, OR TORT
+ *  (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
+ *  THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ *  You should have received a copy of the  GNU General Public License along
+ *  with this program; if not, write  to the Free Software Foundation, Inc.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef _OMAP_WATCHDOG_H
+#define _OMAP_WATCHDOG_H
+
+#define OMAP1610_WATCHDOG_BASE          0xfffeb000
+#define OMAP2420_WATCHDOG_BASE          0x48022000      /*WDT Timer 2 */
+
+#ifdef CONFIG_ARCH_OMAP24XX
+#define OMAP_WATCHDOG_BASE              OMAP2420_WATCHDOG_BASE
+#else
+#define OMAP_WATCHDOG_BASE              OMAP1610_WATCHDOG_BASE
+#define RM_RSTST_WKUP                   0
+#endif
+
+#define OMAP_WATCHDOG_REV               (OMAP_WATCHDOG_BASE + 0x00)
+#define OMAP_WATCHDOG_SYS_CONFIG        (OMAP_WATCHDOG_BASE + 0x10)
+#define OMAP_WATCHDOG_STATUS            (OMAP_WATCHDOG_BASE + 0x14)
+#define OMAP_WATCHDOG_CNTRL             (OMAP_WATCHDOG_BASE + 0x24)
+#define OMAP_WATCHDOG_CRR               (OMAP_WATCHDOG_BASE + 0x28)
+#define OMAP_WATCHDOG_LDR               (OMAP_WATCHDOG_BASE + 0x2c)
+#define OMAP_WATCHDOG_TGR               (OMAP_WATCHDOG_BASE + 0x30)
+#define OMAP_WATCHDOG_WPS               (OMAP_WATCHDOG_BASE + 0x34)
+#define OMAP_WATCHDOG_SPR               (OMAP_WATCHDOG_BASE + 0x48)
+
+/* Using the prescaler, the OMAP watchdog could go for many
+ * months before firing.  These limits work without scaling,
+ * with the 60 second default assumed by most tools and docs.
+ */
+#define TIMER_MARGIN_MAX        (24 * 60 * 60)  /* 1 day */
+#define TIMER_MARGIN_DEFAULT    60      /* 60 secs */
+#define TIMER_MARGIN_MIN        1
+
+#define PTV                     0       /* prescale */
+#define GET_WLDR_VAL(secs)      (0xffffffff - ((secs) * (32768/(1<<PTV))) + 1)
+
+#endif                          /* _OMAP_WATCHDOG_H */