dm: core: Create ofnode stubs when OF_REAL is disabled

When there is no device tree there is not point in trying to find nodes,
etc. since they will all be null.

Add static inlines to skip the code in that case.

Unfortunately this makes the file a little convoluted and there are
two inlines for ofnode_is_enabled() and ofnode_first/next_subnode(). But
it seems better than the alternative.

We could also consider splitting up the file.

Co-developed-by: Claude <noreply@anthropic.com>
Signed-off-by: Simon Glass <simon.glass@canonical.com>

drivers/core/Makefile

@@ -16,6 +16,7 @@ ifndef CONFIG_DM_DEV_READ_INLINE
 obj-$(CONFIG_OF_CONTROL) += read.o
 endif
 obj-$(CONFIG_$(PHASE_)OF_PLATDATA) += read.o
-obj-$(CONFIG_OF_CONTROL) += of_extra.o ofnode.o read_extra.o ofnode_graph.o
+obj-$(CONFIG_OF_CONTROL) += of_extra.o read_extra.o
+obj-$(CONFIG_$(PHASE_)OF_REAL) += ofnode.o ofnode_graph.o
 
 ccflags-$(CONFIG_DM_DEBUG) += -DDEBUG

include/dm/ofnode.h

@@ -140,6 +140,7 @@ static inline void oftree_dispose(oftree tree) {}
 
 #endif /* OFNODE_MULTI_TREE */
 
+#if CONFIG_IS_ENABLED(OF_REAL)
 /**
  * oftree_new() - Create a new, empty tree
  *
@@ -160,6 +161,17 @@ int oftree_new(oftree *treep);
  * error
  */
 int oftree_to_fdt(oftree tree, struct abuf *buf);
+#else
+static inline int oftree_new(oftree *treep)
+{
+	return -ENOSYS;
+}
+
+static inline int oftree_to_fdt(oftree tree, struct abuf *buf)
+{
+	return -ENOSYS;
+}
+#endif /* OF_REAL */
 
 /**
  * ofnode_to_np() - convert an ofnode to a live DT node pointer
@@ -387,6 +399,7 @@ static inline oftree oftree_from_np(struct device_node *root)
 	return tree;
 }
 
+#if CONFIG_IS_ENABLED(OF_REAL)
 /**
  * ofnode_name_eq() - Check a node name ignoring its unit address
  *
@@ -483,6 +496,56 @@ int ofnode_read_u32_index(ofnode node, const char *propname, int index,
  */
 int ofnode_read_u64_index(ofnode node, const char *propname, int index,
 			  u64 *outp);
+#else
+static inline bool ofnode_name_eq(ofnode node, const char *name)
+{
+	return false;
+}
+
+static inline bool ofnode_name_eq_unit(ofnode node, const char *name)
+{
+	return false;
+}
+
+static inline int ofnode_read_u8(ofnode node, const char *propname, u8 *outp)
+{
+	return -EINVAL;
+}
+
+static inline u8 ofnode_read_u8_default(ofnode node, const char *propname,
+					u8 def)
+{
+	return def;
+}
+
+static inline int ofnode_read_u16(ofnode node, const char *propname, u16 *outp)
+{
+	return -EINVAL;
+}
+
+static inline u16 ofnode_read_u16_default(ofnode node, const char *propname,
+					  u16 def)
+{
+	return def;
+}
+
+static inline int ofnode_read_u32(ofnode node, const char *propname, u32 *outp)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_u32_index(ofnode node, const char *propname,
+					int index, u32 *outp)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_u64_index(ofnode node, const char *propname,
+					int index, u64 *outp)
+{
+	return -EINVAL;
+}
+#endif /* OF_REAL */
 
 /**
  * ofnode_read_s32() - Read a 32-bit integer from a property
@@ -498,6 +561,7 @@ static inline int ofnode_read_s32(ofnode node, const char *propname,
 	return ofnode_read_u32(node, propname, (u32 *)outp);
 }
 
+#if CONFIG_IS_ENABLED(OF_REAL)
 /**
  * ofnode_read_u32_default() - Read a 32-bit integer from a property
  *
@@ -620,8 +684,72 @@ ofnode ofnode_find_subnode(ofnode node, const char *subnode_name);
  * subnode)
  */
 ofnode ofnode_find_subnode_unit(ofnode node, const char *subnode_name);
+#else
+static inline u32 ofnode_read_u32_default(ofnode node, const char *propname,
+					  u32 def)
+{
+	return def;
+}
 
-#if CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
+static inline u32 ofnode_read_u32_index_default(ofnode node,
+						const char *propname,
+						int index, u32 def)
+{
+	return def;
+}
+
+static inline int ofnode_read_s32_default(ofnode node, const char *propname,
+					  s32 def)
+{
+	return def;
+}
+
+static inline int ofnode_read_u64(ofnode node, const char *propname, u64 *outp)
+{
+	return -EINVAL;
+}
+
+static inline u64 ofnode_read_u64_default(ofnode node, const char *propname,
+					  u64 def)
+{
+	return def;
+}
+
+static inline const void *ofnode_read_prop(ofnode node, const char *propname,
+					   int *sizep)
+{
+	return NULL;
+}
+
+static inline const char *ofnode_read_string(ofnode node, const char *propname)
+{
+	return NULL;
+}
+
+static inline int ofnode_read_u32_array(ofnode node, const char *propname,
+					u32 *out_values, size_t sz)
+{
+	return -EINVAL;
+}
+
+static inline bool ofnode_read_bool(ofnode node, const char *propname)
+{
+	return false;
+}
+
+static inline ofnode ofnode_find_subnode(ofnode node, const char *subnode_name)
+{
+	return ofnode_null();
+}
+
+static inline ofnode ofnode_find_subnode_unit(ofnode node,
+					      const char *subnode_name)
+{
+	return ofnode_null();
+}
+#endif
+
+#if CONFIG_IS_ENABLED(OF_REAL) && CONFIG_IS_ENABLED(DM_INLINE_OFNODE)
 #include <asm/global_data.h>
 
 static inline bool ofnode_is_enabled(ofnode node)
@@ -653,7 +781,7 @@ static inline ofnode ofnode_next_subnode(ofnode node)
 	return offset_to_ofnode(
 		fdt_next_subnode(gd->fdt_blob, ofnode_to_offset(node)));
 }
-#else
+#elif CONFIG_IS_ENABLED(OF_REAL)
 /**
  * ofnode_is_enabled() - Checks whether a node is enabled.
  * This looks for a 'status' property. If this exists, then returns true if
@@ -683,8 +811,47 @@ ofnode ofnode_first_subnode(ofnode node);
  * has no more siblings)
  */
 ofnode ofnode_next_subnode(ofnode node);
-#endif /* DM_INLINE_OFNODE */
+#else
+static inline bool ofnode_is_enabled(ofnode node)
+{
+	return false;
+}
 
+static inline ofnode ofnode_first_subnode(ofnode node)
+{
+	return ofnode_null();
+}
+
+static inline ofnode ofnode_next_subnode(ofnode node)
+{
+	return ofnode_null();
+}
+#endif
+
+/**
+ * ofnode_for_each_subnode() - iterate over all subnodes of a parent
+ *
+ * @node:       child node (ofnode, lvalue)
+ * @parent:     parent node (ofnode)
+ *
+ * This is a wrapper around a for loop and is used like so::
+ *
+ *   ofnode node;
+ *   ofnode_for_each_subnode(node, parent) {
+ *       Use node
+ *       ...
+ *   }
+ *
+ * Note that this is implemented as a macro and @node is used as
+ * iterator in the loop. The parent variable can be a constant or even a
+ * literal.
+ */
+#define ofnode_for_each_subnode(node, parent) \
+	for (node = ofnode_first_subnode(parent); \
+	     ofnode_valid(node); \
+	     node = ofnode_next_subnode(node))
+
+#if CONFIG_IS_ENABLED(OF_REAL)
 /**
  * ofnode_get_parent() - get the ofnode's parent (enclosing ofnode)
  *
@@ -1440,29 +1607,6 @@ ofnode ofnode_by_compatible(ofnode from, const char *compat);
 ofnode ofnode_by_prop_value(ofnode from, const char *propname,
 			    const void *propval, int proplen);
 
-/**
- * ofnode_for_each_subnode() - iterate over all subnodes of a parent
- *
- * @node:       child node (ofnode, lvalue)
- * @parent:     parent node (ofnode)
- *
- * This is a wrapper around a for loop and is used like so::
- *
- *   ofnode node;
- *   ofnode_for_each_subnode(node, parent) {
- *       Use node
- *       ...
- *   }
- *
- * Note that this is implemented as a macro and @node is used as
- * iterator in the loop. The parent variable can be a constant or even a
- * literal.
- */
-#define ofnode_for_each_subnode(node, parent) \
-	for (node = ofnode_first_subnode(parent); \
-	     ofnode_valid(node); \
-	     node = ofnode_next_subnode(node))
-
 /**
  * ofnode_for_each_compatible_node() - iterate over all nodes with a given
  *				       compatible string
@@ -1663,8 +1807,376 @@ ofnode ofnode_get_phy_node(ofnode eth_node);
  *	   error
  */
 phy_interface_t ofnode_read_phy_mode(ofnode mac_node);
+#else
+static inline ofnode ofnode_get_parent(ofnode node)
+{
+	return ofnode_null();
+}
 
-#if CONFIG_IS_ENABLED(DM)
+static inline const char *ofnode_get_name(ofnode node)
+{
+	return NULL;
+}
+
+static inline int ofnode_get_path(ofnode node, char *buf, int buflen)
+{
+	return -EINVAL;
+}
+
+static inline ofnode ofnode_get_by_phandle(uint phandle)
+{
+	return ofnode_null();
+}
+
+static inline ofnode oftree_get_by_phandle(oftree tree, uint phandle)
+{
+	return ofnode_null();
+}
+
+static inline int ofnode_read_size(ofnode node, const char *propname)
+{
+	return -EINVAL;
+}
+
+static inline fdt_addr_t ofnode_get_addr_size_index(ofnode node, int index,
+						    fdt_size_t *size)
+{
+	return FDT_ADDR_T_NONE;
+}
+
+static inline fdt_addr_t ofnode_get_addr_size_index_notrans(ofnode node,
+							    int index,
+							    fdt_size_t *size)
+{
+	return FDT_ADDR_T_NONE;
+}
+
+static inline fdt_addr_t ofnode_get_addr_index(ofnode node, int index)
+{
+	return FDT_ADDR_T_NONE;
+}
+
+static inline fdt_addr_t ofnode_get_addr(ofnode node)
+{
+	return FDT_ADDR_T_NONE;
+}
+
+static inline fdt_size_t ofnode_get_size(ofnode node)
+{
+	return FDT_SIZE_T_NONE;
+}
+
+static inline int ofnode_stringlist_search(ofnode node, const char *propname,
+					   const char *string)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_string_index(ofnode node, const char *propname,
+					   int index, const char **outp)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_string_count(ofnode node, const char *property)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_string_list(ofnode node, const char *property,
+					  const char ***listp)
+{
+	return -EINVAL;
+}
+
+static inline ofnode ofnode_parse_phandle(ofnode node, const char *phandle_name,
+					  int index)
+{
+	return ofnode_null();
+}
+
+static inline int ofnode_parse_phandle_with_args(ofnode node,
+						 const char *list_name,
+						 const char *cells_name,
+						 int cell_count, int index,
+						 struct ofnode_phandle_args *out_args)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_count_phandle_with_args(ofnode node,
+						 const char *list_name,
+						 const char *cells_name,
+						 int cell_count)
+{
+	return -EINVAL;
+}
+
+static inline ofnode oftree_parse_phandle(oftree tree, ofnode node,
+					  const char *phandle_name, int index)
+{
+	return ofnode_null();
+}
+
+static inline int oftree_parse_phandle_with_args(oftree tree, ofnode node,
+						 const char *list_name,
+						 const char *cells_name,
+						 int cell_count, int index,
+						 struct ofnode_phandle_args *out_args)
+{
+	return -EINVAL;
+}
+
+static inline int oftree_count_phandle_with_args(oftree tree, ofnode node,
+						 const char *list_name,
+						 const char *cells_name,
+						 int cell_count)
+{
+	return -EINVAL;
+}
+
+static inline ofnode ofnode_path(const char *path)
+{
+	return ofnode_null();
+}
+
+static inline ofnode oftree_path(oftree tree, const char *path)
+{
+	return ofnode_null();
+}
+
+static inline ofnode oftree_root(oftree tree)
+{
+	return ofnode_null();
+}
+
+static inline const void *ofnode_read_chosen_prop(const char *propname,
+						  int *sizep)
+{
+	return NULL;
+}
+
+static inline const char *ofnode_read_chosen_string(const char *propname)
+{
+	return NULL;
+}
+
+static inline ofnode ofnode_get_chosen_node(const char *propname)
+{
+	return ofnode_null();
+}
+
+static inline int ofnode_read_baud(void)
+{
+	return -EINVAL;
+}
+
+static inline const void *ofnode_read_aliases_prop(const char *propname,
+						   int *sizep)
+{
+	return NULL;
+}
+
+static inline ofnode ofnode_get_aliases_node(const char *propname)
+{
+	return ofnode_null();
+}
+
+static inline int ofnode_decode_display_timing(ofnode node, int index,
+					       struct display_timing *config)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_decode_panel_timing(ofnode node,
+					     struct display_timing *config)
+{
+	return -EINVAL;
+}
+
+static inline const void *ofnode_get_property(ofnode node, const char *propname,
+					      int *lenp)
+{
+	return NULL;
+}
+
+static inline bool ofnode_has_property(ofnode node, const char *propname)
+{
+	return false;
+}
+
+static inline int ofnode_first_property(ofnode node, struct ofprop *prop)
+{
+	return -FDT_ERR_NOTFOUND;
+}
+
+static inline int ofnode_next_property(struct ofprop *prop)
+{
+	return -FDT_ERR_NOTFOUND;
+}
+
+static inline const void *ofprop_get_property(const struct ofprop *prop,
+					      const char **propname, int *lenp)
+{
+	return NULL;
+}
+
+static inline fdt_addr_t ofnode_get_addr_size(ofnode node, const char *propname,
+					      fdt_size_t *sizep)
+{
+	return FDT_ADDR_T_NONE;
+}
+
+static inline const uint8_t *ofnode_read_u8_array_ptr(ofnode node,
+						      const char *propname,
+						      size_t sz)
+{
+	return NULL;
+}
+
+static inline int ofnode_read_pci_addr(ofnode node, enum fdt_pci_space type,
+				       const char *propname,
+				       struct fdt_pci_addr *addr,
+				       fdt_size_t *size)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_pci_vendev(ofnode node, u16 *vendor, u16 *device)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_eth_phy_id(ofnode node, u16 *vendor, u16 *device)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_addr_cells(ofnode node)
+{
+	return 0;
+}
+
+static inline int ofnode_read_size_cells(ofnode node)
+{
+	return 0;
+}
+
+static inline int ofnode_read_simple_addr_cells(ofnode node)
+{
+	return 0;
+}
+
+static inline int ofnode_read_simple_size_cells(ofnode node)
+{
+	return 0;
+}
+
+static inline bool ofnode_pre_reloc(ofnode node)
+{
+	return false;
+}
+
+static inline int ofnode_read_resource(ofnode node, uint index,
+				       struct resource *res)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_resource_byname(ofnode node, const char *name,
+					      struct resource *res)
+{
+	return -EINVAL;
+}
+
+static inline ofnode ofnode_by_compatible(ofnode from, const char *compat)
+{
+	return ofnode_null();
+}
+
+static inline ofnode ofnode_by_prop_value(ofnode from, const char *propname,
+					  const void *propval, int proplen)
+{
+	return ofnode_null();
+}
+
+static inline int ofnode_get_child_count(ofnode parent)
+{
+	return 0;
+}
+
+static inline u64 ofnode_translate_address(ofnode node, const fdt32_t *in_addr)
+{
+	return OF_BAD_ADDR;
+}
+
+static inline u64 ofnode_translate_dma_address(ofnode node,
+					       const fdt32_t *in_addr)
+{
+	return OF_BAD_ADDR;
+}
+
+static inline int ofnode_get_dma_range(ofnode node, phys_addr_t *cpu,
+				       dma_addr_t *bus, u64 *size)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_device_is_compatible(ofnode node, const char *compat)
+{
+	return 0;
+}
+
+static inline int ofnode_write_prop(ofnode node, const char *propname,
+				    const void *value, int len, bool copy)
+{
+	return -ENOSYS;
+}
+
+static inline int ofnode_write_string(ofnode node, const char *propname,
+				      const char *value)
+{
+	return -ENOSYS;
+}
+
+static inline int ofnode_write_u32(ofnode node, const char *propname, u32 value)
+{
+	return -ENOSYS;
+}
+
+static inline int ofnode_write_u64(ofnode node, const char *propname, u64 value)
+{
+	return -ENOSYS;
+}
+
+static inline int ofnode_write_bool(ofnode node, const char *propname,
+				    bool value)
+{
+	return -ENOSYS;
+}
+
+static inline int ofnode_delete_prop(ofnode node, const char *propname)
+{
+	return -ENOSYS;
+}
+
+static inline int ofnode_set_enabled(ofnode node, bool value)
+{
+	return -ENOSYS;
+}
+
+static inline ofnode ofnode_get_phy_node(ofnode eth_node)
+{
+	return ofnode_null();
+}
+
+static inline phy_interface_t ofnode_read_phy_mode(ofnode mac_node)
+{
+	return PHY_INTERFACE_MODE_NA;
+}
+#endif /* OF_REAL */
+
+#if CONFIG_IS_ENABLED(OF_REAL)
 /**
  * ofnode_conf_read_bool() - Read a boolean value from the U-Boot config
  *
@@ -1802,8 +2314,7 @@ int ofnode_read_bootscript_address(u64 *bootscr_address, u64 *bootscr_offset);
  */
 int ofnode_read_bootscript_flash(u64 *bootscr_flash_offset,
 				 u64 *bootscr_flash_size);
-
-#else /* CONFIG_DM */
+#else
 static inline bool ofnode_conf_read_bool(const char *prop_name)
 {
 	return false;
@@ -1819,7 +2330,29 @@ static inline const char *ofnode_conf_read_str(const char *prop_name)
 	return NULL;
 }
 
-static inline int ofnode_read_bootscript_address(u64 *bootscr_address, u64 *bootscr_offset)
+static inline bool ofnode_options_read_bool(const char *prop_name)
+{
+	return false;
+}
+
+static inline int ofnode_options_read_int(const char *prop_name, int default_val)
+{
+	return default_val;
+}
+
+static inline const char *ofnode_options_read_str(const char *prop_name)
+{
+	return NULL;
+}
+
+static inline int ofnode_options_get_by_phandle(const char *prop_name,
+						ofnode *nodep)
+{
+	return -EINVAL;
+}
+
+static inline int ofnode_read_bootscript_address(u64 *bootscr_address,
+						 u64 *bootscr_offset)
 {
 	return -EINVAL;
 }
@@ -1829,9 +2362,9 @@ static inline int ofnode_read_bootscript_flash(u64 *bootscr_flash_offset,
 {
 	return -EINVAL;
 }
+#endif /* OF_REAL */
 
-#endif /* CONFIG_DM */
-
+#if CONFIG_IS_ENABLED(OF_REAL)
 /**
  * of_add_subnode() - add a new subnode to a node
  *
@@ -1887,5 +2420,28 @@ int ofnode_copy_node(ofnode dst_parent, const char *name, ofnode src,
  *
  */
 int ofnode_delete(ofnode *nodep);
+#else
+static inline int ofnode_add_subnode(ofnode parent, const char *name,
+				     ofnode *nodep)
+{
+	return -ENOSYS;
+}
+
+static inline int ofnode_copy_props(ofnode dst, ofnode src)
+{
+	return -ENOSYS;
+}
+
+static inline int ofnode_copy_node(ofnode dst_parent, const char *name,
+				   ofnode src, ofnode *nodep)
+{
+	return -ENOSYS;
+}
+
+static inline int ofnode_delete(ofnode *nodep)
+{
+	return -ENOSYS;
+}
+#endif /* OF_REAL */
 
 #endif