diff --git a/drivers/i3c/device.c b/drivers/i3c/device.c
index 69cc040..b60f637 100644
--- a/drivers/i3c/device.c
+++ b/drivers/i3c/device.c
@@ -43,7 +43,13 @@ int i3c_device_do_priv_xfers(struct i3c_device *dev,
 	}
 
 	i3c_bus_normaluse_lock(dev->bus);
+	ret = i3c_master_acquire_bus_ownership(dev->desc->common.master);
+	if (ret)
+		goto err_unlock_bus;
+
 	ret = i3c_dev_do_priv_xfers_locked(dev->desc, xfers, nxfers);
+
+err_unlock_bus:
 	i3c_bus_normaluse_unlock(dev->bus);
 
 	return ret;
@@ -114,11 +120,17 @@ int i3c_device_enable_ibi(struct i3c_device *dev)
 	int ret = -ENOENT;
 
 	i3c_bus_normaluse_lock(dev->bus);
+	ret = i3c_master_acquire_bus_ownership(dev->desc->common.master);
+	if (ret)
+		goto err_unlock_bus;
+
 	if (dev->desc) {
 		mutex_lock(&dev->desc->ibi_lock);
 		ret = i3c_dev_enable_ibi_locked(dev->desc);
 		mutex_unlock(&dev->desc->ibi_lock);
 	}
+
+err_unlock_bus:
 	i3c_bus_normaluse_unlock(dev->bus);
 
 	return ret;
@@ -145,11 +157,17 @@ int i3c_device_request_ibi(struct i3c_device *dev,
 		return -EINVAL;
 
 	i3c_bus_normaluse_lock(dev->bus);
+	ret = i3c_master_acquire_bus_ownership(dev->desc->common.master);
+	if (ret)
+		goto err_unlock_bus;
+
 	if (dev->desc) {
 		mutex_lock(&dev->desc->ibi_lock);
 		ret = i3c_dev_request_ibi_locked(dev->desc, req);
 		mutex_unlock(&dev->desc->ibi_lock);
 	}
+
+err_unlock_bus:
 	i3c_bus_normaluse_unlock(dev->bus);
 
 	return ret;
@@ -166,12 +184,20 @@ EXPORT_SYMBOL_GPL(i3c_device_request_ibi);
  */
 void i3c_device_free_ibi(struct i3c_device *dev)
 {
+	int ret;
+
 	i3c_bus_normaluse_lock(dev->bus);
+	ret = i3c_master_acquire_bus_ownership(dev->desc->common.master);
+	if (ret)
+		goto err_unlock_bus;
+
 	if (dev->desc) {
 		mutex_lock(&dev->desc->ibi_lock);
 		i3c_dev_free_ibi_locked(dev->desc);
 		mutex_unlock(&dev->desc->ibi_lock);
 	}
+
+err_unlock_bus:
 	i3c_bus_normaluse_unlock(dev->bus);
 }
 EXPORT_SYMBOL_GPL(i3c_device_free_ibi);
diff --git a/drivers/i3c/internals.h b/drivers/i3c/internals.h
index 86b7b44..929ca6b 100644
--- a/drivers/i3c/internals.h
+++ b/drivers/i3c/internals.h
@@ -14,6 +14,10 @@ extern struct bus_type i3c_bus_type;
 
 void i3c_bus_normaluse_lock(struct i3c_bus *bus);
 void i3c_bus_normaluse_unlock(struct i3c_bus *bus);
+void i3c_bus_downgrade_maintenance_lock(struct i3c_bus *bus);
+int i3c_master_acquire_bus_ownership(struct i3c_master_controller *master);
+int i3c_master_request_mastership_locked(struct i3c_master_controller *master);
+
 
 int i3c_dev_do_priv_xfers_locked(struct i3c_dev_desc *dev,
 				 struct i3c_priv_xfer *xfers,
diff --git a/drivers/i3c/master.c b/drivers/i3c/master.c
index aea4309..7a84158 100644
--- a/drivers/i3c/master.c
+++ b/drivers/i3c/master.c
@@ -93,6 +93,20 @@ void i3c_bus_normaluse_unlock(struct i3c_bus *bus)
 	up_read(&bus->lock);
 }
 
+/**
+ * i3c_bus_downgrade_maintenance_lock - Downgrade the bus lock to normal
+ * operation
+ * @bus: I3C bus to downgrade the lock on
+ *
+ * Should be called when a maintenance operation is done and normal
+ * operation is planned. See i3c_bus_maintenance_lock() and
+ * i3c_bus_normaluse_lock() for more details.
+ */
+void i3c_bus_downgrade_maintenance_lock(struct i3c_bus *bus)
+{
+	downgrade_write(&bus->lock);
+}
+
 static struct i3c_master_controller *dev_to_i3cmaster(struct device *dev)
 {
 	return container_of(dev, struct i3c_master_controller, dev);
@@ -341,6 +355,22 @@ static int i3c_device_probe(struct device *dev)
 	return driver->probe(i3cdev);
 }
 
+static void i3c_master_enable_mr_events(struct i3c_master_controller *master)
+{
+	if (!master->ops->enable_mr_events)
+		return;
+
+	master->ops->enable_mr_events(master);
+}
+
+static void i3c_master_disable_mr_events(struct i3c_master_controller *master)
+{
+	if (!master->ops->disable_mr_events)
+		return;
+
+	master->ops->disable_mr_events(master);
+}
+
 static int i3c_device_remove(struct device *dev)
 {
 	struct i3c_device *i3cdev = dev_to_i3cdev(dev);
@@ -462,6 +492,36 @@ static int i3c_bus_init(struct i3c_bus *i3cbus)
 	return 0;
 }
 
+int i3c_master_request_mastership_locked(struct i3c_master_controller *master)
+{
+	if (WARN_ON(master->init_done &&
+	    !rwsem_is_locked(&master->bus.lock)))
+		return -EINVAL;
+
+	if (!master->ops->request_mastership)
+		return -ENOTSUPP;
+
+	return master->ops->request_mastership(master);
+}
+
+int i3c_master_acquire_bus_ownership(struct i3c_master_controller *master)
+{
+	int ret;
+
+	if (master->bus.cur_master != master->this) {
+		i3c_bus_normaluse_unlock(&master->bus);
+		i3c_bus_maintenance_lock(&master->bus);
+
+		ret = i3c_master_request_mastership_locked(master);
+		if (ret) {
+			i3c_bus_maintenance_unlock(&master->bus);
+			return ret;
+		}
+		i3c_bus_downgrade_maintenance_lock(&master->bus);
+	}
+	return 0;
+}
+
 static const char * const i3c_bus_mode_strings[] = {
 	[I3C_BUS_MODE_PURE] = "pure",
 	[I3C_BUS_MODE_MIXED_FAST] = "mixed-fast",
@@ -620,6 +680,25 @@ i3c_master_alloc_i2c_dev(struct i3c_master_controller *master,
 
 	dev->common.master = master;
 	dev->boardinfo = boardinfo;
+	dev->addr = boardinfo->base.addr;
+	dev->lvr = boardinfo->lvr;
+
+	return dev;
+}
+
+static struct i2c_dev_desc *
+i3c_master_alloc_i2c_dev_no_boardinfo(struct i3c_master_controller *master,
+				      u16 addr, u8 lvr)
+{
+	struct i2c_dev_desc *dev;
+
+	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+	if (!dev)
+		return ERR_PTR(-ENOMEM);
+
+	dev->common.master = master;
+	dev->addr = addr;
+	dev->lvr = lvr;
 
 	return dev;
 }
@@ -693,6 +772,9 @@ i3c_master_find_i2c_dev_by_addr(const struct i3c_master_controller *master,
 	struct i2c_dev_desc *dev;
 
 	i3c_bus_for_each_i2cdev(&master->bus, dev) {
+		if (!dev->boardinfo)
+			continue;
+
 		if (dev->boardinfo->base.addr == addr)
 			return dev;
 	}
@@ -939,8 +1021,8 @@ int i3c_master_defslvs_locked(struct i3c_master_controller *master)
 
 	desc = defslvs->slaves;
 	i3c_bus_for_each_i2cdev(bus, i2cdev) {
-		desc->lvr = i2cdev->boardinfo->lvr;
-		desc->static_addr = i2cdev->boardinfo->base.addr << 1;
+		desc->lvr = i2cdev->lvr;
+		desc->static_addr = i2cdev->addr << 1;
 		desc++;
 	}
 
@@ -1492,6 +1574,83 @@ i3c_master_register_new_i3c_devs(struct i3c_master_controller *master)
 	}
 }
 
+static struct i2c_dev_boardinfo *
+i3c_master_find_i2c_boardinfo(const struct i3c_master_controller *master,
+			      u16 addr, u8 lvr)
+{
+	struct i2c_dev_boardinfo *i2cboardinfo;
+
+	list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) {
+		if (i2cboardinfo->base.addr == addr &&
+		    i2cboardinfo->lvr == lvr)
+			return i2cboardinfo;
+	}
+
+	return NULL;
+}
+
+static void
+i3c_master_register_new_i2c_devs(struct i3c_master_controller *master)
+{
+	struct i2c_adapter *adap = i3c_master_to_i2c_adapter(master);
+	struct i2c_dev_desc *i2cdev;
+
+	if (!master->init_done)
+		return;
+
+	i3c_bus_for_each_i2cdev(&master->bus, i2cdev) {
+		if (i2cdev->dev)
+			continue;
+
+		if (!i2cdev->boardinfo)
+			continue;
+
+		i2cdev->dev = i2c_new_device(adap, &i2cdev->boardinfo->base);
+	}
+}
+
+/**
+ * i3c_master_get_accmst_locked() - send a GETACCMST CCC command
+ * @master: master used to send frames on the bus
+ * @info: I3C device information
+ *
+ * Send a GETACCMST CCC command.
+ *
+ * This should be called if the curent master acknowledges bus takeover.
+ *
+ * This function must be called with the bus lock held in write mode.
+ *
+ * Return: 0 in case of success, a positive I3C error code if the error is
+ * one of the official Mx error codes, and a negative error code otherwise.
+ */
+int i3c_master_get_accmst_locked(struct i3c_master_controller *master,
+				 u8 addr)
+{
+	struct i3c_ccc_getaccmst *accmst;
+	struct i3c_ccc_cmd_dest dest;
+	struct i3c_ccc_cmd cmd;
+	int ret;
+
+	accmst = i3c_ccc_cmd_dest_init(&dest, addr, sizeof(*accmst));
+	if (!accmst)
+		return -ENOMEM;
+
+	i3c_ccc_cmd_init(&cmd, true, I3C_CCC_GETACCMST, &dest, 1);
+
+	ret = i3c_master_send_ccc_cmd_locked(master, &cmd);
+	if (ret)
+		goto out;
+
+	if (dest.payload.len != sizeof(*accmst))
+		ret = -EIO;
+
+out:
+	i3c_ccc_cmd_dest_cleanup(&dest);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(i3c_master_get_accmst_locked);
+
 /**
  * i3c_master_do_daa() - do a DAA (Dynamic Address Assignment)
  * @master: master doing the DAA
@@ -1559,10 +1718,6 @@ int i3c_master_set_info(struct i3c_master_controller *master,
 	if (!i3c_bus_dev_addr_is_avail(&master->bus, info->dyn_addr))
 		return -EINVAL;
 
-	if (I3C_BCR_DEVICE_ROLE(info->bcr) == I3C_BCR_I3C_MASTER &&
-	    master->secondary)
-		return -EINVAL;
-
 	if (master->this)
 		return -EINVAL;
 
@@ -1607,43 +1762,13 @@ static void i3c_master_detach_free_devs(struct i3c_master_controller *master)
 				 common.node) {
 		i3c_master_detach_i2c_dev(i2cdev);
 		i3c_bus_set_addr_slot_status(&master->bus,
-					i2cdev->boardinfo->base.addr,
-					I3C_ADDR_SLOT_FREE);
+					     i2cdev->addr,
+					     I3C_ADDR_SLOT_FREE);
 		i3c_master_free_i2c_dev(i2cdev);
 	}
 }
 
-/**
- * i3c_master_bus_init() - initialize an I3C bus
- * @master: main master initializing the bus
- *
- * This function is following all initialisation steps described in the I3C
- * specification:
- *
- * 1. Attach I2C and statically defined I3C devs to the master so that the
- *    master can fill its internal device table appropriately
- *
- * 2. Call &i3c_master_controller_ops->bus_init() method to initialize
- *    the master controller. That's usually where the bus mode is selected
- *    (pure bus or mixed fast/slow bus)
- *
- * 3. Instruct all devices on the bus to drop their dynamic address. This is
- *    particularly important when the bus was previously configured by someone
- *    else (for example the bootloader)
- *
- * 4. Disable all slave events.
- *
- * 5. Pre-assign dynamic addresses requested by the FW with SETDASA for I3C
- *    devices that have a static address
- *
- * 6. Do a DAA (Dynamic Address Assignment) to assign dynamic addresses to all
- *    remaining I3C devices
- *
- * Once this is done, all I3C and I2C devices should be usable.
- *
- * Return: a 0 in case of success, an negative error code otherwise.
- */
-static int i3c_master_bus_init(struct i3c_master_controller *master)
+static int i3c_master_attach_static_devs(struct i3c_master_controller *master)
 {
 	enum i3c_addr_slot_status status;
 	struct i2c_dev_boardinfo *i2cboardinfo;
@@ -1652,32 +1777,24 @@ static int i3c_master_bus_init(struct i3c_master_controller *master)
 	struct i2c_dev_desc *i2cdev;
 	int ret;
 
-	/*
-	 * First attach all devices with static definitions provided by the
-	 * FW.
-	 */
 	list_for_each_entry(i2cboardinfo, &master->boardinfo.i2c, node) {
 		status = i3c_bus_get_addr_slot_status(&master->bus,
 						      i2cboardinfo->base.addr);
-		if (status != I3C_ADDR_SLOT_FREE) {
-			ret = -EBUSY;
-			goto err_detach_devs;
-		}
+		if (status != I3C_ADDR_SLOT_FREE)
+			return -EBUSY;
 
 		i3c_bus_set_addr_slot_status(&master->bus,
 					     i2cboardinfo->base.addr,
 					     I3C_ADDR_SLOT_I2C_DEV);
 
 		i2cdev = i3c_master_alloc_i2c_dev(master, i2cboardinfo);
-		if (IS_ERR(i2cdev)) {
-			ret = PTR_ERR(i2cdev);
-			goto err_detach_devs;
-		}
+		if (IS_ERR(i2cdev))
+			return PTR_ERR(i2cdev);
 
 		ret = i3c_master_attach_i2c_dev(master, i2cdev);
 		if (ret) {
 			i3c_master_free_i2c_dev(i2cdev);
-			goto err_detach_devs;
+			return ret;
 		}
 	}
 	list_for_each_entry(i3cboardinfo, &master->boardinfo.i3c, node) {
@@ -1687,28 +1804,71 @@ static int i3c_master_bus_init(struct i3c_master_controller *master)
 
 		if (i3cboardinfo->init_dyn_addr) {
 			status = i3c_bus_get_addr_slot_status(&master->bus,
-						i3cboardinfo->init_dyn_addr);
-			if (status != I3C_ADDR_SLOT_FREE) {
-				ret = -EBUSY;
-				goto err_detach_devs;
-			}
+							      i3cboardinfo->init_dyn_addr);
+			if (status != I3C_ADDR_SLOT_FREE)
+				return -EBUSY;
 		}
 
 		i3cdev = i3c_master_alloc_i3c_dev(master, &info);
-		if (IS_ERR(i3cdev)) {
-			ret = PTR_ERR(i3cdev);
-			goto err_detach_devs;
-		}
+		if (IS_ERR(i3cdev))
+			return PTR_ERR(i3cdev);
 
 		i3cdev->boardinfo = i3cboardinfo;
 
 		ret = i3c_master_attach_i3c_dev(master, i3cdev);
 		if (ret) {
 			i3c_master_free_i3c_dev(i3cdev);
-			goto err_detach_devs;
+			return ret;
 		}
 	}
 
+	return 0;
+}
+
+/**
+ * i3c_master_bus_init() - initialize an I3C bus
+ * @master: main master initializing the bus
+ *
+ * This function is following all initialisation steps described in the I3C
+ * specification:
+ *
+ * 1. Attach I2C and statically defined I3C devs to the master so that the
+ *    master can fill its internal device table appropriately
+ *
+ * 2. Call &i3c_master_controller_ops->bus_init() method to initialize
+ *    the master controller. That's usually where the bus mode is selected
+ *    (pure bus or mixed fast/slow bus)
+ *
+ * 3. Instruct all devices on the bus to drop their dynamic address. This is
+ *    particularly important when the bus was previously configured by someone
+ *    else (for example the bootloader)
+ *
+ * 4. Disable all slave events.
+ *
+ * 5. Pre-assign dynamic addresses requested by the FW with SETDASA for I3C
+ *    devices that have a static address
+ *
+ * 6. Do a DAA (Dynamic Address Assignment) to assign dynamic addresses to all
+ *    remaining I3C devices
+ *
+ * Once this is done, all I3C and I2C devices should be usable.
+ *
+ * Return: a 0 in case of success, an negative error code otherwise.
+ */
+static int i3c_master_bus_init(struct i3c_master_controller *master)
+{
+	struct i3c_dev_desc *i3cdev;
+	int ret;
+
+	/*
+	 * First attach all devices with static definitions provided by the
+	 * FW.
+	 */
+	if (!master->secondary) {
+		ret = i3c_master_attach_static_devs(master);
+		if (ret)
+			goto err_detach_devs;
+	}
 	/*
 	 * Now execute the controller specific ->bus_init() routine, which
 	 * might configure its internal logic to match the bus limitations.
@@ -1729,6 +1889,13 @@ static int i3c_master_bus_init(struct i3c_master_controller *master)
 	}
 
 	/*
+	 * Don't reset addresses if this is secondary master.
+	 * Secondary masters can't do DAA.
+	 */
+	if (master->secondary)
+		return 0;
+
+	/*
 	 * Reset all dynamic address that may have been assigned before
 	 * (assigned by the bootloader for example).
 	 */
@@ -1791,6 +1958,49 @@ i3c_master_search_i3c_dev_duplicate(struct i3c_dev_desc *refdev)
 	return NULL;
 }
 
+int i3c_master_add_i2c_dev(struct i3c_master_controller *master,
+			   u16 addr, u8 lvr)
+{
+	enum i3c_addr_slot_status status;
+	struct i2c_dev_desc *i2cdev;
+	int ret;
+
+	if (!master)
+		return -EINVAL;
+
+	status = i3c_bus_get_addr_slot_status(&master->bus,
+					      addr);
+	if (status != I3C_ADDR_SLOT_FREE)
+		return -EBUSY;
+
+	i3c_bus_set_addr_slot_status(&master->bus, addr,
+				     I3C_ADDR_SLOT_I2C_DEV);
+
+	i2cdev = i3c_master_alloc_i2c_dev_no_boardinfo(master, addr, lvr);
+	if (IS_ERR(i2cdev)) {
+		ret = PTR_ERR(i2cdev);
+		goto err_free_dev;
+	}
+
+	i2cdev->boardinfo = i3c_master_find_i2c_boardinfo(master, addr, lvr);
+
+	ret = i3c_master_attach_i2c_dev(master, i2cdev);
+	if (ret) {
+		ret = PTR_ERR(i2cdev);
+		goto err_free_dev;
+	}
+
+	return 0;
+
+err_free_dev:
+	i3c_bus_set_addr_slot_status(&master->bus, addr,
+				     I3C_ADDR_SLOT_FREE);
+	i3c_master_free_i2c_dev(i2cdev);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(i3c_master_add_i2c_dev);
+
 /**
  * i3c_master_add_i3c_dev_locked() - add an I3C slave to the bus
  * @master: master used to send frames on the bus
@@ -2113,11 +2323,17 @@ static int i3c_master_i2c_adapter_xfer(struct i2c_adapter *adap,
 	}
 
 	i3c_bus_normaluse_lock(&master->bus);
+	ret = i3c_master_acquire_bus_ownership(master);
+	if (ret)
+		goto err_unlock_bus;
+
 	dev = i3c_master_find_i2c_dev_by_addr(master, addr);
 	if (!dev)
 		ret = -ENOENT;
 	else
 		ret = master->ops->i2c_xfers(dev, xfers, nxfers);
+
+err_unlock_bus:
 	i3c_bus_normaluse_unlock(&master->bus);
 
 	return ret ? ret : nxfers;
@@ -2151,8 +2367,12 @@ static int i3c_master_i2c_adapter_init(struct i3c_master_controller *master)
 	 * We silently ignore failures here. The bus should keep working
 	 * correctly even if one or more i2c devices are not registered.
 	 */
-	i3c_bus_for_each_i2cdev(&master->bus, i2cdev)
+	i3c_bus_for_each_i2cdev(&master->bus, i2cdev) {
+		if (!i2cdev->boardinfo)
+			continue;
+
 		i2cdev->dev = i2c_new_device(adap, &i2cdev->boardinfo->base);
+	}
 
 	return 0;
 }
@@ -2393,18 +2613,43 @@ static int i3c_master_check_ops(const struct i3c_master_controller_ops *ops)
 	     !ops->recycle_ibi_slot))
 		return -EINVAL;
 
+	if (ops->request_mastership &&
+	    (!ops->enable_mr_events || !ops->disable_mr_events))
+		return -EINVAL;
+
 	return 0;
 }
 
 /**
+ * i3c_master_register_new_devs() - register new devices
+ * @master: master used to send frames on the bus
+ *
+ * This function is useful when devices were not added
+ * during initialization or when new device joined the bus
+ * which was under control of different master.
+ */
+void i3c_master_register_new_devs(struct i3c_master_controller *master)
+{
+	/*
+	 * We can register I3C devices received from master by DEFSLVS.
+	 */
+	i3c_bus_normaluse_lock(&master->bus);
+	i3c_master_register_new_i3c_devs(master);
+	i3c_bus_normaluse_unlock(&master->bus);
+
+	i3c_bus_normaluse_lock(&master->bus);
+	i3c_master_register_new_i2c_devs(master);
+	i3c_bus_normaluse_unlock(&master->bus);
+}
+EXPORT_SYMBOL_GPL(i3c_master_register_new_devs);
+
+/**
  * i3c_master_register() - register an I3C master
  * @master: master used to send frames on the bus
  * @parent: the parent device (the one that provides this I3C master
  *	    controller)
  * @ops: the master controller operations
- * @secondary: true if you are registering a secondary master. Will return
- *	       -ENOTSUPP if set to true since secondary masters are not yet
- *	       supported
+ * @secondary: true if you are registering a secondary master.
  *
  * This function takes care of everything for you:
  *
@@ -2427,10 +2672,6 @@ int i3c_master_register(struct i3c_master_controller *master,
 	struct i2c_dev_boardinfo *i2cbi;
 	int ret;
 
-	/* We do not support secondary masters yet. */
-	if (secondary)
-		return -ENOTSUPP;
-
 	ret = i3c_master_check_ops(ops);
 	if (ret)
 		return ret;
@@ -2504,9 +2745,11 @@ int i3c_master_register(struct i3c_master_controller *master,
 	 * register I3C devices dicovered during the initial DAA.
 	 */
 	master->init_done = true;
-	i3c_bus_normaluse_lock(&master->bus);
-	i3c_master_register_new_i3c_devs(master);
-	i3c_bus_normaluse_unlock(&master->bus);
+	i3c_master_register_new_devs(master);
+
+	i3c_bus_maintenance_lock(&master->bus);
+	i3c_master_enable_mr_events(master);
+	i3c_bus_maintenance_unlock(&master->bus);
 
 	return 0;
 
@@ -2524,6 +2767,30 @@ int i3c_master_register(struct i3c_master_controller *master,
 EXPORT_SYMBOL_GPL(i3c_master_register);
 
 /**
+ * i3c_master_mastership_ack() - performs operations before bus handover.
+ * @master: master used to send frames on the bus
+ * @addr: I3C device address
+ *
+ * Basically, it sends DEFSLVS command to ensure new master is taking
+ * the bus with complete list of devices and then acknowledges bus takeover.
+ *
+ * Return: 0 in case of success, a negative error code otherwise.
+ */
+int i3c_master_mastership_ack(struct i3c_master_controller *master,
+			      u8 addr)
+{
+	int ret;
+
+	i3c_bus_maintenance_lock(&master->bus);
+	ret = i3c_master_get_accmst_locked(master, addr);
+	i3c_bus_maintenance_unlock(&master->bus);
+
+	return ret;
+}
+EXPORT_SYMBOL_GPL(i3c_master_mastership_ack);
+
+
+/**
  * i3c_master_unregister() - unregister an I3C master
  * @master: master used to send frames on the bus
  *
@@ -2533,6 +2800,10 @@ EXPORT_SYMBOL_GPL(i3c_master_register);
  */
 int i3c_master_unregister(struct i3c_master_controller *master)
 {
+	i3c_bus_maintenance_lock(&master->bus);
+	i3c_master_disable_mr_events(master);
+	i3c_bus_maintenance_unlock(&master->bus);
+
 	i3c_master_i2c_adapter_cleanup(master);
 	i3c_master_unregister_i3c_devs(master);
 	i3c_master_bus_cleanup(master);
diff --git a/include/linux/i3c/master.h b/include/linux/i3c/master.h
index 42bb215..f32afd3 100644
--- a/include/linux/i3c/master.h
+++ b/include/linux/i3c/master.h
@@ -421,6 +421,12 @@ struct i3c_bus {
  *		      for a future IBI
  *		      This method is mandatory only if ->request_ibi is not
  *		      NULL.
+ * @request_mastership: requests bus mastership. Mastership is requested
+ *                      automatically when device driver wants to transfer
+ *                      data using master in slave mode.
+ * @enable_mr_events: enable the Mastership event.
+ *                    Mastership does not require handler.
+ * @disable_mr_events: disable the Mastership event.
  */
 struct i3c_master_controller_ops {
 	int (*bus_init)(struct i3c_master_controller *master);
@@ -447,6 +453,10 @@ struct i3c_master_controller_ops {
 	int (*disable_ibi)(struct i3c_dev_desc *dev);
 	void (*recycle_ibi_slot)(struct i3c_dev_desc *dev,
 				 struct i3c_ibi_slot *slot);
+	void (*update_devs)(struct i3c_master_controller *master);
+	int (*request_mastership)(struct i3c_master_controller *master);
+	int (*enable_mr_events)(struct i3c_master_controller *master);
+	int (*disable_mr_events)(struct i3c_master_controller *master);
 };
 
 /**
@@ -526,6 +536,8 @@ int i3c_master_defslvs_locked(struct i3c_master_controller *master);
 int i3c_master_get_free_addr(struct i3c_master_controller *master,
 			     u8 start_addr);
 
+int i3c_master_add_i2c_dev(struct i3c_master_controller *master,
+			   u16 addr, u8 lvr);
 int i3c_master_add_i3c_dev_locked(struct i3c_master_controller *master,
 				  u8 addr);
 int i3c_master_do_daa(struct i3c_master_controller *master);
@@ -538,6 +550,11 @@ int i3c_master_register(struct i3c_master_controller *master,
 			const struct i3c_master_controller_ops *ops,
 			bool secondary);
 int i3c_master_unregister(struct i3c_master_controller *master);
+int i3c_master_get_accmst_locked(struct i3c_master_controller *master,
+				 u8 addr);
+int i3c_master_mastership_ack(struct i3c_master_controller *master,
+			      u8 addr);
+void i3c_master_register_new_devs(struct i3c_master_controller *master);
 
 /**
  * i3c_dev_get_master_data() - get master private data attached to an I3C
