path: root/tools/testing/selftests/watchdog/watchdog-test.c
diff options
authorEugeniu Rosca <erosca@de.adit-jv.com>2017-07-01 14:57:30 +0200
committerShuah Khan <shuahkh@osg.samsung.com>2017-07-24 12:37:07 -0600
commita3d6d79f11673427ba2cfa09e358f0eccd06fbee (patch)
tree553394be45dae78fbe0d96f4577779c6fac14046 /tools/testing/selftests/watchdog/watchdog-test.c
parentselftests: watchdog: avoid keepalive flood (diff)
selftests: watchdog: get boot reason via WDIOC_GETBOOTSTATUS
Some watchdog drivers implement WDIOF_CARDRESET feature. As example, see commit b6ef36d2c1e3 ("watchdog: qcom: Report reboot reason"). This option allows reporting to userspace the cause of the last boot (POR/watchdog reset), being helpful in e.g. automated test-cases. Add support for WDIOC_GETBOOTSTATUS in the test code, to be able to: - check if watchdog drivers properly implement WDIOF_CARDRESET. - check the last boot status, if WDIOF_CARDRESET is implemented. Make the `-b, --bootstatus` option one-shot. That means, skip the keepalive mechanism if `-b` is provided on the command line, as we are only interested in the boot status information. Tested on Rcar-H3 Salvator-X board: ********************** Cold boot finished salvator-x:/home/root# ./watchdog-test -h Usage: ./watchdog-test [options] -b, --bootstatus Get last boot status (Watchdog/POR) -d, --disable Turn off the watchdog timer -e, --enable Turn on the watchdog timer -h, --help Print the help message -p, --pingrate=P Set ping rate to P seconds (default 1) -t, --timeout=T Set timeout to T seconds Parameters are parsed left-to-right in real-time. Example: ./watchdog-test -d -t 10 -p 5 -e salvator-x:/home/root# salvator-x:/home/root# ./watchdog-test -b Last boot is caused by: Power-On-Reset. salvator-x:/home/root# salvator-x:/home/root# ./watchdog-test -d -t 1 -p 2 -e Watchdog card disabled. Watchdog timeout set to 1 seconds. Watchdog ping rate set to 2 seconds. Watchdog card enabled. Watchdog Ticking Away! ********************** Reboot due to watchdog trigger finished salvator-x:/home/root# ./watchdog-test -b Last boot is caused by: Watchdog. salvator-x:/home/root# salvator-x:/home/root# reboot ********************** Reboot due to user action finished salvator-x:/home/root# ./watchdog-test -b Last boot is caused by: Power-On-Reset. salvator-x:/home/root# Signed-off-by: Eugeniu Rosca <erosca@de.adit-jv.com> Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
Diffstat (limited to 'tools/testing/selftests/watchdog/watchdog-test.c')
1 files changed, 17 insertions, 1 deletions
diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c
index 9b34b319fc91..a1391be2dc1e 100644
--- a/tools/testing/selftests/watchdog/watchdog-test.c
+++ b/tools/testing/selftests/watchdog/watchdog-test.c
@@ -18,8 +18,9 @@
int fd;
const char v = 'V';
-static const char sopts[] = "dehp:t:";
+static const char sopts[] = "bdehp:t:";
static const struct option lopts[] = {
+ {"bootstatus", no_argument, NULL, 'b'},
{"disable", no_argument, NULL, 'd'},
{"enable", no_argument, NULL, 'e'},
{"help", no_argument, NULL, 'h'},
@@ -63,6 +64,7 @@ static void term(int sig)
static void usage(char *progname)
printf("Usage: %s [options]\n", progname);
+ printf(" -b, --bootstatus Get last boot status (Watchdog/POR)\n");
printf(" -d, --disable Turn off the watchdog timer\n");
printf(" -e, --enable Turn on the watchdog timer\n");
printf(" -h, --help Print the help message\n");
@@ -79,6 +81,7 @@ int main(int argc, char *argv[])
unsigned int ping_rate = DEFAULT_PING_RATE;
int ret;
int c;
+ int oneshot = 0;
setbuf(stdout, NULL);
@@ -91,6 +94,16 @@ int main(int argc, char *argv[])
while ((c = getopt_long(argc, argv, sopts, lopts, NULL)) != -1) {
switch (c) {
+ case 'b':
+ flags = 0;
+ oneshot = 1;
+ ret = ioctl(fd, WDIOC_GETBOOTSTATUS, &flags);
+ if (!ret)
+ printf("Last boot is caused by: %s.\n", (flags != 0) ?
+ "Watchdog" : "Power-On-Reset");
+ else
+ printf("WDIOC_GETBOOTSTATUS errno '%s'\n", strerror(errno));
+ break;
case 'd':
ret = ioctl(fd, WDIOC_SETOPTIONS, &flags);
@@ -127,6 +140,9 @@ int main(int argc, char *argv[])
+ if (oneshot)
+ goto end;
printf("Watchdog Ticking Away!\n");
signal(SIGINT, term);