diff --git a/cdb_assist.c b/cdb_assist.c
index 2aa9667..1c0ce11 100644
--- a/cdb_assist.c
+++ b/cdb_assist.c
@@ -583,3 +583,10 @@ void cdb_set_voltage(struct cdb_assist *cdb, unsigned mV)
 	n = sprintf(buf, "u%d\r\n", mV);
 	cdb_ctrl_write(cdb, buf, n);
 }
+
+void cdb_fastboot_key(struct device *dev, bool on)
+{
+	struct cdb_assist *cdb = dev->cdb;
+
+	cdb_gpio(cdb, 1, on);
+}
diff --git a/cdb_assist.h b/cdb_assist.h
index 6d33d72..ec94029 100644
--- a/cdb_assist.h
+++ b/cdb_assist.h
@@ -19,5 +19,6 @@ void cdb_target_break(struct cdb_assist *cdb);
 unsigned int cdb_vref(struct cdb_assist *cdb);
 void cdb_assist_print_status(struct device *dev);
 void cdb_set_voltage(struct cdb_assist *cdb, unsigned mV);
+void cdb_fastboot_key(struct device *dev, bool on);
 
 #endif
diff --git a/device.c b/device.c
index 81d439a..cabac0e 100644
--- a/device.c
+++ b/device.c
@@ -138,3 +138,9 @@ void device_boot(struct device *device, const void *data, size_t len)
 	fastboot_download(device->fastboot, data, len);
 	device->boot(device);
 }
+
+void device_fastboot_key(struct device *device, bool on)
+{
+	if (device->fastboot_key)
+		device->fastboot_key(device, on);
+}
diff --git a/device.h b/device.h
index 46dc0c0..974d686 100644
--- a/device.h
+++ b/device.h
@@ -25,6 +25,7 @@ struct device {
 	void (*print_status)(struct device *dev);
 	void (*vbus)(struct device *dev, bool on);
 	int (*write)(struct device *dev, const void *buf, size_t len);
+	void (*fastboot_key)(struct device *dev, bool on);
 	bool set_active;
 
 	void *cdb;
@@ -46,5 +47,6 @@ void device_boot(struct device *device, const void *data, size_t len);
 
 void device_fastboot_boot(struct device *device);
 void device_fastboot_flash_reboot(struct device *device);
+void device_fastboot_key(struct device *device, bool on);
 
 #endif
diff --git a/device_parser.c b/device_parser.c
index aca9fca..6a3fa6f 100644
--- a/device_parser.c
+++ b/device_parser.c
@@ -99,6 +99,7 @@ static void parse_board(struct device_parser *dp)
 			dev->print_status = cdb_assist_print_status;
 			dev->vbus = cdb_assist_vbus;
 			dev->write = cdb_target_write;
+			dev->fastboot_key = cdb_fastboot_key;
 		} else if (!strcmp(key, "conmux")) {
 			dev->cdb_serial = strdup(value);
 
@@ -111,9 +112,13 @@ static void parse_board(struct device_parser *dp)
 		} else if (!strcmp(key, "fastboot")) {
 			dev->serial = strdup(value);
 
-			dev->boot = device_fastboot_boot;
+			if (!dev->boot)
+				dev->boot = device_fastboot_boot;
 		} else if (!strcmp(key, "fastboot_set_active")) {
 			dev->set_active = !strcmp(value, "true");
+		} else if (!strcmp(key, "broken_fastboot_boot")) {
+			if (!strcmp(value, "true"))
+				dev->boot = device_fastboot_flash_reboot;
 		} else {
 			fprintf(stderr, "device parser: unknown key \"%s\"\n", key);
 			exit(1);