+// SPDX-License-Identifier: GPL-2.0-only
+#include <stdio.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <linux/fitblk.h>
+
+static int fitblk_release(char *device)
+{
+ int fd, ret;
+
+ fd = open(device, O_RDONLY);
+ if (fd == -1)
+ return errno;
+
+ ret = ioctl(fd, FITBLK_RELEASE, NULL);
+ close(fd);
+
+ if (ret == -1)
+ return errno;
+
+ return 0;
+}
+
+int main(int argc, char *argp[])
+{
+ int ret;
+
+ if (argc != 2) {
+ fprintf(stderr, "Release uImage.FIT sub-image block device\n");
+ fprintf(stderr, "Syntax: %s /dev/fitXXX\n", argp[0]);
+ return -EINVAL;
+ }
+
+ ret = fitblk_release(argp[1]);
+ if (ret)
+ fprintf(stderr, "fitblk: error releasing %s: %s\n", argp[1],
+ strerror(ret));
+ else
+ fprintf(stderr, "fitblk: %s released\n", argp[1]);
+
+ return ret;
+}