dm: core: allow device_bind() to not return a device pointer

[karo-tx-uboot.git] / include / dm / device-internal.h

diff --git a/include/dm/device-internal.h b/include/dm/device-internal.h
index 44cb7ef93bfdeea682ea0602d33bf9615260ad9d..322d35a4789c2f81a1401d066af09f3a47b22983 100644 (file)
--- a/include/dm/device-internal.h
+++ b/include/dm/device-internal.h
@@ -31,10 +31,10 @@ struct udevice;
  * devices which use device tree.
  * @of_offset: Offset of device tree node for this device. This is -1 for
  * devices which don't use device tree.
- * @devp: Returns a pointer to the bound device
+ * @devp: if non-NULL, returns a pointer to the bound device
  * @return 0 if OK, -ve on error
  */
-int device_bind(struct udevice *parent, struct driver *drv,
+int device_bind(struct udevice *parent, const struct driver *drv,
                const char *name, void *platdata, int of_offset,
                struct udevice **devp);
 
@@ -48,7 +48,7 @@ int device_bind(struct udevice *parent, struct driver *drv,
  * @pre_reloc_only: If true, bind the driver only if its DM_INIT_F flag is set.
  * If false bind the driver always.
  * @info: Name and platdata for this device
- * @devp: Returns a pointer to the bound device
+ * @devp: if non-NULL, returns a pointer to the bound device
  * @return 0 if OK, -ve on error
  */
 int device_bind_by_name(struct udevice *parent, bool pre_reloc_only,
@@ -87,7 +87,11 @@ int device_probe_child(struct udevice *dev, void *parent_priv);
  * @dev: Pointer to device to remove
  * @return 0 if OK, -ve on error (an error here is normally a very bad thing)
  */
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
 int device_remove(struct udevice *dev);
+#else
+static inline int device_remove(struct udevice *dev) { return 0; }
+#endif
 
 /**
  * device_unbind() - Unbind a device, destroying it
@@ -97,10 +101,90 @@ int device_remove(struct udevice *dev);
  * @dev: Pointer to device to unbind
  * @return 0 if OK, -ve on error
  */
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
 int device_unbind(struct udevice *dev);
+#else
+static inline int device_unbind(struct udevice *dev) { return 0; }
+#endif
+
+/**
+ * device_remove_children() - Stop all device's children
+ * @dev:       The device whose children are to be removed
+ * @return 0 on success, -ve on error
+ */
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
+int device_remove_children(struct udevice *dev);
+#else
+static inline int device_remove_children(struct udevice *dev) { return 0; }
+#endif
+
+/**
+ * device_unbind_children() - Unbind all device's children from the device
+ *
+ * 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
+ * @return 0 on success, -ve on error
+ */
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
+int device_unbind_children(struct udevice *dev);
+#else
+static inline int device_unbind_children(struct udevice *dev) { return 0; }
+#endif
+
+#if CONFIG_IS_ENABLED(DM_DEVICE_REMOVE)
+void device_free(struct udevice *dev);
+#else
+static inline void device_free(struct udevice *dev) {}
+#endif
+
+/**
+ * simple_bus_translate() - translate a bus address to a system address
+ *
+ * This handles the 'ranges' property in a simple bus. It translates the
+ * device address @addr to a system address using this property.
+ *
+ * @dev:       Simple bus device (parent of target device)
+ * @addr:      Address to translate
+ * @return new address
+ */
+fdt_addr_t simple_bus_translate(struct udevice *dev, fdt_addr_t addr);
 
 /* Cast away any volatile pointer */
 #define DM_ROOT_NON_CONST              (((gd_t *)gd)->dm_root)
 #define DM_UCLASS_ROOT_NON_CONST       (((gd_t *)gd)->uclass_root)
 
+/* device resource management */
+#ifdef CONFIG_DEVRES
+
+/**
+ * devres_release_probe - Release managed resources allocated after probing
+ * @dev: Device to release resources for
+ *
+ * Release all resources allocated for @dev when it was probed or later.
+ * This function is called on driver removal.
+ */
+void devres_release_probe(struct udevice *dev);
+
+/**
+ * devres_release_all - Release all managed resources
+ * @dev: Device to release resources for
+ *
+ * Release all resources associated with @dev.  This function is
+ * called on driver unbinding.
+ */
+void devres_release_all(struct udevice *dev);
+
+#else /* ! CONFIG_DEVRES */
+
+static inline void devres_release_probe(struct udevice *dev)
+{
+}
+
+static inline void devres_release_all(struct udevice *dev)
+{
+}
+
+#endif /* ! CONFIG_DEVRES */
 #endif