1 files changed, 83 insertions, 0 deletions
diff --git a/commands/devunbind.c b/commands/devunbind.c
new file mode 100644
index 0000000000..d30193b285
--- /dev/null
+++ b/commands/devunbind.c
@@ -0,0 +1,83 @@
+// SPDX-License-Identifier: GPL-2.0-only
+// SPDX-FileCopyrightText: © 2021 Ahmad Fatoum <a.fatoum@pengutronix.de>, Pengutronix
+
+#include <command.h>
+#include <common.h>
+#include <complete.h>
+#include <driver.h>
+#include <getopt.h>
+
+static int do_devunbind(int argc, char *argv[])
+{
+	bool unregister = false;
+	struct device *dev;
+	int ret = COMMAND_SUCCESS, i, opt;
+
+	while ((opt = getopt(argc, argv, "fl")) > 0) {
+		switch (opt) {
+		case 'f':
+			unregister = true;
+			break;
+		case 'l':
+			list_for_each_entry(dev, &active_device_list, active) {
+				void *rm_dev;
+
+				BUG_ON(!dev->driver);
+
+				rm_dev = dev->bus->remove ?: dev->driver->remove;
+
+				if (rm_dev)
+					printf("%pS(%s, %s)\n", rm_dev,
+					       dev->driver->name, dev_name(dev));
+			}
+			return 0;
+		default:
+			return COMMAND_ERROR_USAGE;
+		}
+	}
+
+	if (!argv[optind])
+		return COMMAND_ERROR_USAGE;
+
+	for (i = optind; i < argc; i++) {
+		dev = get_device_by_name(argv[i]);
+		if (!dev) {
+			printf("skipping missing %s\n", argv[i]);
+			ret = -ENODEV;
+			continue;
+		}
+
+		if (unregister) {
+			unregister_device(dev);
+			continue;
+		}
+
+		if (!device_remove(dev)) {
+			printf("no remove callback registered for %s\n", argv[i]);
+			ret = COMMAND_ERROR;
+			continue;
+		}
+
+		dev->driver = NULL;
+		list_del(&dev->active);
+	}
+
+	return ret;
+}
+
+BAREBOX_CMD_HELP_START(devunbind)
+BAREBOX_CMD_HELP_TEXT("Debugging aid to unbind device from driver at runtime")
+BAREBOX_CMD_HELP_TEXT("")
+BAREBOX_CMD_HELP_TEXT("Options:")
+BAREBOX_CMD_HELP_OPT ("-f",  "unbind driver and force removal of device and children")
+BAREBOX_CMD_HELP_OPT ("-l",  "list remove callbacks in shutdown order")
+BAREBOX_CMD_HELP_END
+
+BAREBOX_CMD_START(devunbind)
+	.cmd		= do_devunbind,
+	BAREBOX_CMD_DESC("unbind device(s) from driver")
+	BAREBOX_CMD_OPTS("[-fl] DEVICES..")
+	BAREBOX_CMD_GROUP(CMD_GRP_INFO)
+	BAREBOX_CMD_HELP(cmd_devunbind_help)
+	BAREBOX_CMD_COMPLETE(device_complete)
+BAREBOX_CMD_END