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[WATCHDOG] Add support for WM831x watchdog

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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>
This commit is contained in:
Mark Brown
2009-07-27 14:46:12 +01:00
committed by Wim Van Sebroeck
parent 0400e3134b
commit 502a0106b2
4 changed files with 501 additions and 0 deletions
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52
include/linux/mfd/wm831x/watchdog.h Normal file
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/*
* 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