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
-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@xxxxxxxxxxxxxx>
---
tools/testing/selftests/watchdog/watchdog-test.c | 18 +++++++++++++++++-
1 file changed, 17 insertions(+), 1 deletion(-)
diff --git a/tools/testing/selftests/watchdog/watchdog-test.c b/tools/testing/selftests/watchdog/watchdog-test.c
index c768b51a044e..baab8cd00697 100644
--- a/tools/testing/selftests/watchdog/watchdog-test.c
+++ b/tools/testing/selftests/watchdog/watchdog-test.c
@@ -16,8 +16,9 @@
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'},
@@ -61,6 +62,7 @@ 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");
@@ -77,6 +79,7 @@ int main(int argc, char *argv[])
unsigned int ping_rate = 1;
int ret;
int c;
+ int oneshot = 0;
setbuf(stdout, NULL);
@@ -89,6 +92,16 @@ 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("Failed to get boot status.\n");
+ break;
case 'd':
flags = WDIOS_DISABLECARD;
ret = ioctl(fd, WDIOC_SETOPTIONS, &flags);
@@ -125,6 +138,9 @@ int main(int argc, char *argv[])
}
}
+ if (oneshot)
+ goto end;
+
printf("Watchdog Ticking Away!\n");
signal(SIGINT, term);
--
2.13.0
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