selftests: watchdog: Add command line option to show watchdog_info

With the new ioctl(WDIOC_GETSUPPORT) call in place, add a command
line option to show the watchdog_info.

Suggested-by: Eugeniu Rosca <[e-mail]>
Signed-off-by: George G. Davis <[e-mail]>
Signed-off-by: Eugeniu Rosca <[e-mail]>
Signed-off-by: Shuah Khan <[e-mail]>

tools/testing/selftests/watchdog/watchdog-test.c

···
 
 int fd;
 const char v = 'V';
-static const char sopts[] = "bdehp:t:Tn:NLf:";
+static const char sopts[] = "bdehp:t:Tn:NLf:i";
 static const struct option lopts[] = {
 	{"bootstatus",          no_argument, NULL, 'b'},
 	{"disable",             no_argument, NULL, 'd'},
···
 	{"getpretimeout",       no_argument, NULL, 'N'},
 	{"gettimeleft",		no_argument, NULL, 'L'},
 	{"file",          required_argument, NULL, 'f'},
+	{"info",		no_argument, NULL, 'i'},
 	{NULL,                  no_argument, NULL, 0x0}
 };
 
···
 	printf("Usage: %s [options]\n", progname);
 	printf(" -f, --file\t\tOpen watchdog device file\n");
 	printf("\t\t\tDefault is /dev/watchdog\n");
+	printf(" -i, --info\t\tShow watchdog_info\n");
 	printf(" -b, --bootstatus\tGet last boot status (Watchdog/POR)\n");
 	printf(" -d, --disable\t\tTurn off the watchdog timer\n");
 	printf(" -e, --enable\t\tTurn on the watchdog timer\n");
···
 			break;
 		case 'f':
 			/* Handled above */
+			break;
+		case 'i':
+			/*
+			 * watchdog_info was obtained as part of file open
+			 * validation. So we just show it here.
+			 */
+			oneshot = 1;
+			printf("watchdog_info:\n");
+			printf(" identity:\t\t%s\n", info.identity);
+			printf(" firmware_version:\t%u\n",
+			       info.firmware_version);
+			printf(" options:\t\t%08x\n", info.options);
 			break;
 
 		default: