[WATCHDOG] Add support for WM831x watchdog

The WM831x series of devices provide a watchdog with configurable
behaviour on timer expiry.

Currently this driver support refreshes via a register or GPIO line and
autonomous refreshes from a hardware source (eg, a clock).

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Wim Van Sebroeck <wim@iguana.be>

1 files changed, 52 insertions, 0 deletions

diff --git a/include/linux/mfd/wm831x/watchdog.h b/include/linux/mfd/wm831x/watchdog.h
new file mode 100644
index 000000000000..97a99b52956f
--- /dev/null
+++ b/include/linux/mfd/wm831x/watchdog.h
@@ -0,0 +1,52 @@
+/*
+ * include/linux/mfd/wm831x/watchdog.h -- Watchdog for WM831x
+ *
+ * Copyright 2009 Wolfson Microelectronics PLC.
+ *
+ * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
+ *
+ *  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.
+ *
+ */
+
+#ifndef __MFD_WM831X_WATCHDOG_H__
+#define __MFD_WM831X_WATCHDOG_H__
+
+
+/*
+ * R16388 (0x4004) - Watchdog
+ */
+#define WM831X_WDOG_ENA                         0x8000  /* WDOG_ENA */
+#define WM831X_WDOG_ENA_MASK                    0x8000  /* WDOG_ENA */
+#define WM831X_WDOG_ENA_SHIFT                       15  /* WDOG_ENA */
+#define WM831X_WDOG_ENA_WIDTH                        1  /* WDOG_ENA */
+#define WM831X_WDOG_DEBUG                       0x4000  /* WDOG_DEBUG */
+#define WM831X_WDOG_DEBUG_MASK                  0x4000  /* WDOG_DEBUG */
+#define WM831X_WDOG_DEBUG_SHIFT                     14  /* WDOG_DEBUG */
+#define WM831X_WDOG_DEBUG_WIDTH                      1  /* WDOG_DEBUG */
+#define WM831X_WDOG_RST_SRC                     0x2000  /* WDOG_RST_SRC */
+#define WM831X_WDOG_RST_SRC_MASK                0x2000  /* WDOG_RST_SRC */
+#define WM831X_WDOG_RST_SRC_SHIFT                   13  /* WDOG_RST_SRC */
+#define WM831X_WDOG_RST_SRC_WIDTH                    1  /* WDOG_RST_SRC */
+#define WM831X_WDOG_SLPENA                      0x1000  /* WDOG_SLPENA */
+#define WM831X_WDOG_SLPENA_MASK                 0x1000  /* WDOG_SLPENA */
+#define WM831X_WDOG_SLPENA_SHIFT                    12  /* WDOG_SLPENA */
+#define WM831X_WDOG_SLPENA_WIDTH                     1  /* WDOG_SLPENA */
+#define WM831X_WDOG_RESET                       0x0800  /* WDOG_RESET */
+#define WM831X_WDOG_RESET_MASK                  0x0800  /* WDOG_RESET */
+#define WM831X_WDOG_RESET_SHIFT                     11  /* WDOG_RESET */
+#define WM831X_WDOG_RESET_WIDTH                      1  /* WDOG_RESET */
+#define WM831X_WDOG_SECACT_MASK                 0x0300  /* WDOG_SECACT - [9:8] */
+#define WM831X_WDOG_SECACT_SHIFT                     8  /* WDOG_SECACT - [9:8] */
+#define WM831X_WDOG_SECACT_WIDTH                     2  /* WDOG_SECACT - [9:8] */
+#define WM831X_WDOG_PRIMACT_MASK                0x0030  /* WDOG_PRIMACT - [5:4] */
+#define WM831X_WDOG_PRIMACT_SHIFT                    4  /* WDOG_PRIMACT - [5:4] */
+#define WM831X_WDOG_PRIMACT_WIDTH                    2  /* WDOG_PRIMACT - [5:4] */
+#define WM831X_WDOG_TO_MASK                     0x0007  /* WDOG_TO - [2:0] */
+#define WM831X_WDOG_TO_SHIFT                         0  /* WDOG_TO - [2:0] */
+#define WM831X_WDOG_TO_WIDTH                         3  /* WDOG_TO - [2:0] */
+
+#endif