int *lenp);
/**
+ * dev_read_first_prop()- get the reference of the first property
+ *
+ * Get reference to the first property of the node, it is used to iterate
+ * and read all the property with dev_read_prop_by_prop().
+ *
+ * @dev: device to check
+ * @prop: place to put argument reference
+ * @return 0 if OK, -ve on error. -FDT_ERR_NOTFOUND if not found
+ */
+int dev_read_first_prop(const struct udevice *dev, struct ofprop *prop);
+
+/**
+ * ofnode_get_next_property() - get the reference of the next property
+ *
+ * Get reference to the next property of the node, it is used to iterate
+ * and read all the property with dev_read_prop_by_prop().
+ *
+ * @prop: reference of current argument and place to put reference of next one
+ * @return 0 if OK, -ve on error. -FDT_ERR_NOTFOUND if not found
+ */
+int dev_read_next_prop(struct ofprop *prop);
+
+/**
+ * dev_read_prop_by_prop() - get a pointer to the value of a property
+ *
+ * Get value for the property identified by the provided reference.
+ *
+ * @prop: reference on property
+ * @propname: If non-NULL, place to property name on success,
+ * @lenp: If non-NULL, place to put length on success
+ * @return 0 if OK, -ve on error. -FDT_ERR_NOTFOUND if not found
+ */
+const void *dev_read_prop_by_prop(struct ofprop *prop,
+ const char **propname, int *lenp);
+
+/**
* dev_read_alias_seq() - Get the alias sequence number of a node
*
* This works out whether a node is pointed to by an alias, and if so, the
*/
int dev_read_alias_highest_id(const char *stem);
+/**
+ * dev_get_child_count() - get the child count of a device
+ *
+ * @dev: device to use for interation (struct udevice *)
+ * @return the count of child subnode
+ */
+int dev_get_child_count(const struct udevice *dev);
+
#else /* CONFIG_DM_DEV_READ_INLINE is enabled */
static inline int dev_read_u32(const struct udevice *dev,
return ofnode_get_property(dev_ofnode(dev), propname, lenp);
}
+static inline int dev_read_first_prop(const struct udevice *dev, struct ofprop *prop)
+{
+ return ofnode_get_first_property(dev_ofnode(dev), prop);
+}
+
+static inline int dev_read_next_prop(struct ofprop *prop)
+{
+ return ofnode_get_next_property(prop);
+}
+
+static inline const void *dev_read_prop_by_prop(struct ofprop *prop,
+ const char **propname,
+ int *lenp)
+{
+ return ofnode_get_property_by_prop(prop, propname, lenp);
+}
+
static inline int dev_read_alias_seq(const struct udevice *dev, int *devnump)
{
return fdtdec_get_alias_seq(gd->fdt_blob, dev->uclass->uc_drv->name,
return fdtdec_get_alias_highest_id(gd->fdt_blob, stem);
}
+static inline int dev_get_child_count(const struct udevice *dev)
+{
+ return ofnode_get_child_count(dev_ofnode(dev));
+}
+
#endif /* CONFIG_DM_DEV_READ_INLINE */
/**
ofnode_valid(subnode); \
subnode = ofnode_next_subnode(subnode))
+/**
+ * dev_for_each_property() - Helper function to iterate through property
+ *
+ * This creates a for() loop which works through the property in a device's
+ * device-tree node.
+ *
+ * @prop: struct ofprop holding the current property
+ * @dev: device to use for interation (struct udevice *)
+ */
+#define dev_for_each_property(prop, dev) \
+ for (int ret_prop = dev_read_first_prop(dev, &prop); \
+ !ret_prop; \
+ ret_prop = dev_read_next_prop(&prop))
+
#endif