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authorJuergen Beisert <jbe@pengutronix.de>2012-06-27 16:30:41 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2012-06-29 15:16:34 +0200
commit2928591eab21eb6bf4a085f5f19bf87c21ee7866 (patch)
tree100ff3787f434c0cc38da6c1d6ee53d7ddc89466 /commands/wd.c
parentfd4c51aa28acfd61e1802cb5ab1197d808e7da82 (diff)
downloadbarebox-2928591eab21eb6bf4a085f5f19bf87c21ee7866.tar.gz
Add a simple watchdog framework
This patch adds a simple wd command which can setup, trigger and stop a watchdog on the platform. Signed-off-by: Juergen Beisert <jbe@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'commands/wd.c')
-rw-r--r--commands/wd.c68
1 files changed, 68 insertions, 0 deletions
diff --git a/commands/wd.c b/commands/wd.c
new file mode 100644
index 0000000..080bab9
--- /dev/null
+++ b/commands/wd.c
@@ -0,0 +1,68 @@
+/*
+ * (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>
+
+/* default timeout in [sec] */
+static unsigned timeout = CONFIG_CMD_WD_DEFAULT_TIMOUT;
+
+static int do_wd(int argc, char *argv[])
+{
+ int rc;
+
+ if (argc > 1) {
+ if (isdigit(*argv[1])) {
+ timeout = simple_strtoul(argv[1], NULL, 0);
+ } else {
+ printf("numerical parameter expected\n");
+ return 1;
+ }
+ }
+
+ rc = watchdog_set_timeout(timeout);
+ if (rc < 0) {
+ switch (rc) {
+ case -EINVAL:
+ printf("Timeout value out of range\n");
+ break;
+ case -ENOSYS:
+ printf("Watchdog cannot be disabled\n");
+ break;
+ default:
+ printf("Watchdog fails: '%s'\n", strerror(-rc));
+ break;
+ }
+
+ return 1;
+ }
+
+ return 0;
+}
+
+BAREBOX_CMD_HELP_START(wd)
+BAREBOX_CMD_HELP_USAGE("wd [<time>]\n")
+BAREBOX_CMD_HELP_SHORT("enable the watchdog to bark in <time> seconds. "
+ "When <time> is 0, the watchdog gets disabled,\n"
+ "without a parameter the watchdog will be re-triggered\n")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(wd)
+ .cmd = do_wd,
+ .usage = "enable/disable/trigger the watchdog",
+ BAREBOX_CMD_HELP(cmd_wd_help)
+BAREBOX_CMD_END