--- /dev/null
+include $(TOPDIR)/rules.mk
+
+PKG_NAME:=fitblk
+PKG_RELEASE:=1
+PKG_LICENSE:=GPL-2.0-only
+PKG_MAINTAINER:=Daniel Golle <daniel@makrotopia.org>
+
+PKG_BUILD_DIR := $(BUILD_DIR)/$(PKG_NAME)
+
+PKG_FLAGS:=nonshared
+
+include $(INCLUDE_DIR)/package.mk
+
+define Package/fitblk
+ HIDDEN:=1
+ SECTION:=base
+ CATEGORY:=Base system
+ TITLE:=fitblk firmware release tool
+ DEPENDS:=@LINUX_6_1
+endef
+
+define Package/fitblk/description
+Release uImage.FIT block devices using ioctl.
+endef
+
+define Build/Configure
+endef
+
+define Build/Compile
+ $(MAKE) -C $(PKG_BUILD_DIR) \
+ CC="$(TARGET_CC)" \
+ CFLAGS="$(TARGET_CFLAGS) -Wall -Werror" \
+ LDFLAGS="$(TARGET_LDFLAGS)"
+endef
+
+define Package/fitblk/install
+ $(INSTALL_DIR) $(1)/usr/sbin
+ $(INSTALL_BIN) $(PKG_BUILD_DIR)/fitblk $(1)/usr/sbin/
+endef
+
+$(eval $(call BuildPackage,fitblk))
--- /dev/null
+// 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;
+}