diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/Kconfig | 2 | ||||
| -rw-r--r-- | drivers/Makefile | 1 | ||||
| -rw-r--r-- | drivers/watchdog/Kconfig | 9 | ||||
| -rw-r--r-- | drivers/watchdog/Makefile | 1 | ||||
| -rw-r--r-- | drivers/watchdog/wd_core.c | 57 |
5 files changed, 69 insertions, 1 deletions
diff --git a/drivers/Kconfig b/drivers/Kconfig index c52c56a56a..089dc3f99b 100644 --- a/drivers/Kconfig +++ b/drivers/Kconfig @@ -15,7 +15,7 @@ source "drivers/mfd/Kconfig" source "drivers/led/Kconfig" source "drivers/eeprom/Kconfig" source "drivers/input/Kconfig" - +source "drivers/watchdog/Kconfig" source "drivers/pwm/Kconfig" endmenu diff --git a/drivers/Makefile b/drivers/Makefile index 3aefc1221d..72c4058fea 100644 --- a/drivers/Makefile +++ b/drivers/Makefile @@ -15,3 +15,4 @@ obj-$(CONFIG_LED) += led/ obj-y += eeprom/ obj-$(CONFIG_PWM) += pwm/ obj-y += input/ +obj-y += watchdog/ diff --git a/drivers/watchdog/Kconfig b/drivers/watchdog/Kconfig new file mode 100644 index 0000000000..c734dfe282 --- /dev/null +++ b/drivers/watchdog/Kconfig @@ -0,0 +1,9 @@ +menuconfig WATCHDOG + bool "Watchdog support " + help + Many platforms support a watchdog to keep track of a working machine. + This framework provides routines to handle these watchdogs. + +if WATCHDOG + +endif diff --git a/drivers/watchdog/Makefile b/drivers/watchdog/Makefile new file mode 100644 index 0000000000..630f1b6ca2 --- /dev/null +++ b/drivers/watchdog/Makefile @@ -0,0 +1 @@ +obj-$(CONFIG_WATCHDOG) += wd_core.o diff --git a/drivers/watchdog/wd_core.c b/drivers/watchdog/wd_core.c new file mode 100644 index 0000000000..3d0cfc635d --- /dev/null +++ b/drivers/watchdog/wd_core.c @@ -0,0 +1,57 @@ +/* + * (c) 2012 Juergen Beisert <kernel@pengutronix.de> + * + * 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 program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include <common.h> +#include <command.h> +#include <errno.h> +#include <linux/ctype.h> +#include <watchdog.h> + +/* + * Note: this simple framework supports one watchdog only. + */ +static struct watchdog *watchdog; + +int watchdog_register(struct watchdog *wd) +{ + if (watchdog != NULL) + return -EBUSY; + + watchdog = wd; + return 0; +} +EXPORT_SYMBOL(watchdog_register); + +int watchdog_deregister(struct watchdog *wd) +{ + if (watchdog == NULL || wd != watchdog) + return -ENODEV; + + watchdog = NULL; + return 0; +} +EXPORT_SYMBOL(watchdog_deregister); + +/* + * start, stop or retrigger the watchdog + * timeout in [seconds]. timeout of '0' will disable the watchdog (if possible) + */ +int watchdog_set_timeout(unsigned timeout) +{ + if (watchdog == NULL) + return -ENODEV; + + return watchdog->set_timeout(watchdog, timeout); +} +EXPORT_SYMBOL(watchdog_set_timeout); |