device: expose the functions used to remove and unbind children of a device

Also add a 'drv' parameter to filter the children to remove/unbind.
Exporting those functions is a preparatory work for the addition of the
bind/unbind commands.

Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>

1 files changed, 38 insertions, 0 deletions

diff --git a/include/dm/device-internal.h b/include/dm/device-internal.h
index f4af15448f..02ac4c7952 100644
--- a/include/dm/device-internal.h
+++ b/include/dm/device-internal.h
@@ -131,6 +131,44 @@ static inline void device_free(struct udevice *dev) {}
 #endif
 
 /**
+ * device_chld_unbind() - Unbind all device's children from the device if bound
+ *			  to drv
+ *
+ * On error, the function continues to unbind all children, and reports the
+ * first error.
+ *
+ * @dev:	The device that is to be stripped of its children
+ * @drv:	The targeted driver
+ * @return 0 on success, -ve on error
+ */
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
+int device_chld_unbind(struct udevice *dev, struct driver *drv);
+#else
+static inline int device_chld_unbind(struct udevice *dev, struct driver *drv)
+{
+	return 0;
+}
+#endif
+
+/**
+ * device_chld_remove() - Stop all device's children
+ * @dev:	The device whose children are to be removed
+ * @drv:	The targeted driver
+ * @flags:	Flag, if this functions is called in the pre-OS stage
+ * @return 0 on success, -ve on error
+ */
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
+int device_chld_remove(struct udevice *dev, struct driver *drv,
+		       uint flags);
+#else
+static inline int device_chld_remove(struct udevice *dev, struct driver *drv,
+				     uint flags)
+{
+	return 0;
+}
+#endif
+
+/**
  * simple_bus_translate() - translate a bus address to a system address
  *
  * This handles the 'ranges' property in a simple bus. It translates the