kernel-ark/arch/ppc/syslib/m8xx_wdt.h
Marcelo Tosatti fb64c2446b [PATCH] ppc32: m8xx watchdog update
This updates m8xx_wdt as follows:

1) Remove now obsolete fpos check in the write() function. The driver is
currently non functional due to this bug.

2) Use in/out macros for register access.

3) Allows m8xx_wdt to use a kernel timer instead of the builtin RTC/PIT
for keep-alive trigger (which is responsible for servicing the watchdog
until an userspace application takes over). For instance Cyclades PRxK
boards (MPC 855T based) have a non-functional internal RTC/PIT unit.
Behaviour for boards with RTC/PIT is unchaged.

4) The last change required moving the RTCSC register setting code
to a weak function which can be overriden by board specific files.
Otherwise the timer init code trashes the register making it impossible
for m8xx_wdt to detect the situation.

Signed-off-by: Marcelo Tosatti <marcelo.tosatti@cyclades.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-01-09 14:50:51 +11:00

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/*
* Author: Florian Schirmer <jolt@tuxbox.org>
*
* 2002 (c) Florian Schirmer <jolt@tuxbox.org> This file is licensed under
* the terms of the GNU General Public License version 2. This program
* is licensed "as is" without any warranty of any kind, whether express
* or implied.
*/
#ifndef _PPC_SYSLIB_M8XX_WDT_H
#define _PPC_SYSLIB_M8XX_WDT_H
extern int m8xx_has_internal_rtc;
extern void m8xx_wdt_handler_install(bd_t * binfo);
extern int m8xx_wdt_get_timeout(void);
extern void m8xx_wdt_reset(void);
extern void m8xx_wdt_install_timer(void);
extern void m8xx_wdt_stop_timer(void);
#endif /* _PPC_SYSLIB_M8XX_WDT_H */