dm: core: Use const device for the dev_read_...() interface

These functions do not modify the device so should use a const pointer to
it. Update the code accordingly.
Signed-off-by: NSimon Glass <sjg@chromium.org>

drivers/core/read.c

@@ -11,27 +11,29 @@
 #include <mapmem.h>
 #include <dm/of_access.h>
 
-int dev_read_u32(struct udevice *dev, const char *propname, u32 *outp)
+int dev_read_u32(const struct udevice *dev, const char *propname, u32 *outp)
 {
 	return ofnode_read_u32(dev_ofnode(dev), propname, outp);
 }
 
-int dev_read_u32_default(struct udevice *dev, const char *propname, int def)
+int dev_read_u32_default(const struct udevice *dev, const char *propname,
+			 int def)
 {
 	return ofnode_read_u32_default(dev_ofnode(dev), propname, def);
 }
 
-int dev_read_s32(struct udevice *dev, const char *propname, s32 *outp)
+int dev_read_s32(const struct udevice *dev, const char *propname, s32 *outp)
 {
 	return ofnode_read_u32(dev_ofnode(dev), propname, (u32 *)outp);
 }
 
-int dev_read_s32_default(struct udevice *dev, const char *propname, int def)
+int dev_read_s32_default(const struct udevice *dev, const char *propname,
+			 int def)
 {
 	return ofnode_read_u32_default(dev_ofnode(dev), propname, def);
 }
 
-int dev_read_u32u(struct udevice *dev, const char *propname, uint *outp)
+int dev_read_u32u(const struct udevice *dev, const char *propname, uint *outp)
 {
 	u32 val;
 	int ret;
@@ -44,32 +46,33 @@ int dev_read_u32u(struct udevice *dev, const char *propname, uint *outp)
 	return 0;
 }
 
-int dev_read_u64(struct udevice *dev, const char *propname, u64 *outp)
+int dev_read_u64(const struct udevice *dev, const char *propname, u64 *outp)
 {
 	return ofnode_read_u64(dev_ofnode(dev), propname, outp);
 }
 
-u64 dev_read_u64_default(struct udevice *dev, const char *propname, u64 def)
+u64 dev_read_u64_default(const struct udevice *dev, const char *propname,
+			 u64 def)
 {
 	return ofnode_read_u64_default(dev_ofnode(dev), propname, def);
 }
 
-const char *dev_read_string(struct udevice *dev, const char *propname)
+const char *dev_read_string(const struct udevice *dev, const char *propname)
 {
 	return ofnode_read_string(dev_ofnode(dev), propname);
 }
 
-bool dev_read_bool(struct udevice *dev, const char *propname)
+bool dev_read_bool(const struct udevice *dev, const char *propname)
 {
 	return ofnode_read_bool(dev_ofnode(dev), propname);
 }
 
-ofnode dev_read_subnode(struct udevice *dev, const char *subnode_name)
+ofnode dev_read_subnode(const struct udevice *dev, const char *subnode_name)
 {
 	return ofnode_find_subnode(dev_ofnode(dev), subnode_name);
 }
 
-ofnode dev_read_first_subnode(struct udevice *dev)
+ofnode dev_read_first_subnode(const struct udevice *dev)
 {
 	return ofnode_first_subnode(dev_ofnode(dev));
 }
@@ -79,12 +82,12 @@ ofnode dev_read_next_subnode(ofnode node)
 	return ofnode_next_subnode(node);
 }
 
-int dev_read_size(struct udevice *dev, const char *propname)
+int dev_read_size(const struct udevice *dev, const char *propname)
 {
 	return ofnode_read_size(dev_ofnode(dev), propname);
 }
 
-fdt_addr_t dev_read_addr_index(struct udevice *dev, int index)
+fdt_addr_t dev_read_addr_index(const struct udevice *dev, int index)
 {
 	if (ofnode_is_np(dev_ofnode(dev)))
 		return ofnode_get_addr_index(dev_ofnode(dev), index);
@@ -92,7 +95,7 @@ fdt_addr_t dev_read_addr_index(struct udevice *dev, int index)
 		return devfdt_get_addr_index(dev, index);
 }
 
-fdt_addr_t dev_read_addr_size_index(struct udevice *dev, int index,
+fdt_addr_t dev_read_addr_size_index(const struct udevice *dev, int index,
 				    fdt_size_t *size)
 {
 	if (ofnode_is_np(dev_ofnode(dev)))
@@ -101,7 +104,7 @@ fdt_addr_t dev_read_addr_size_index(struct udevice *dev, int index,
 		return devfdt_get_addr_size_index(dev, index, size);
 }
 
-void *dev_remap_addr_index(struct udevice *dev, int index)
+void *dev_remap_addr_index(const struct udevice *dev, int index)
 {
 	fdt_addr_t addr = dev_read_addr_index(dev, index);
 
@@ -111,7 +114,7 @@ void *dev_remap_addr_index(struct udevice *dev, int index)
 	return map_physmem(addr, 0, MAP_NOCACHE);
 }
 
-fdt_addr_t dev_read_addr_name(struct udevice *dev, const char *name)
+fdt_addr_t dev_read_addr_name(const struct udevice *dev, const char *name)
 {
 	int index = dev_read_stringlist_search(dev, "reg-names", name);
 
@@ -121,7 +124,7 @@ fdt_addr_t dev_read_addr_name(struct udevice *dev, const char *name)
 		return dev_read_addr_index(dev, index);
 }
 
-fdt_addr_t dev_read_addr_size_name(struct udevice *dev, const char *name,
+fdt_addr_t dev_read_addr_size_name(const struct udevice *dev, const char *name,
 				   fdt_size_t *size)
 {
 	int index = dev_read_stringlist_search(dev, "reg-names", name);
@@ -132,7 +135,7 @@ fdt_addr_t dev_read_addr_size_name(struct udevice *dev, const char *name,
 		return dev_read_addr_size_index(dev, index, size);
 }
 
-void *dev_remap_addr_name(struct udevice *dev, const char *name)
+void *dev_remap_addr_name(const struct udevice *dev, const char *name)
 {
 	fdt_addr_t addr = dev_read_addr_name(dev, name);
 
@@ -142,52 +145,52 @@ void *dev_remap_addr_name(struct udevice *dev, const char *name)
 	return map_physmem(addr, 0, MAP_NOCACHE);
 }
 
-fdt_addr_t dev_read_addr(struct udevice *dev)
+fdt_addr_t dev_read_addr(const struct udevice *dev)
 {
 	return dev_read_addr_index(dev, 0);
 }
 
-void *dev_read_addr_ptr(struct udevice *dev)
+void *dev_read_addr_ptr(const struct udevice *dev)
 {
 	fdt_addr_t addr = dev_read_addr(dev);
 
 	return (addr == FDT_ADDR_T_NONE) ? NULL : map_sysmem(addr, 0);
 }
 
-void *dev_remap_addr(struct udevice *dev)
+void *dev_remap_addr(const struct udevice *dev)
 {
 	return dev_remap_addr_index(dev, 0);
 }
 
-fdt_addr_t dev_read_addr_size(struct udevice *dev, const char *property,
+fdt_addr_t dev_read_addr_size(const struct udevice *dev, const char *property,
 			      fdt_size_t *sizep)
 {
 	return ofnode_get_addr_size(dev_ofnode(dev), property, sizep);
 }
 
-const char *dev_read_name(struct udevice *dev)
+const char *dev_read_name(const struct udevice *dev)
 {
 	return ofnode_get_name(dev_ofnode(dev));
 }
 
-int dev_read_stringlist_search(struct udevice *dev, const char *property,
+int dev_read_stringlist_search(const struct udevice *dev, const char *property,
 			       const char *string)
 {
 	return ofnode_stringlist_search(dev_ofnode(dev), property, string);
 }
 
-int dev_read_string_index(struct udevice *dev, const char *propname, int index,
-			  const char **outp)
+int dev_read_string_index(const struct udevice *dev, const char *propname,
+			  int index, const char **outp)
 {
 	return ofnode_read_string_index(dev_ofnode(dev), propname, index, outp);
 }
 
-int dev_read_string_count(struct udevice *dev, const char *propname)
+int dev_read_string_count(const struct udevice *dev, const char *propname)
 {
 	return ofnode_read_string_count(dev_ofnode(dev), propname);
 }
 
-int dev_read_phandle_with_args(struct udevice *dev, const char *list_name,
+int dev_read_phandle_with_args(const struct udevice *dev, const char *list_name,
 			       const char *cells_name, int cell_count,
 			       int index, struct ofnode_phandle_args *out_args)
 {
@@ -196,34 +199,34 @@ int dev_read_phandle_with_args(struct udevice *dev, const char *list_name,
 					      out_args);
 }
 
-int dev_count_phandle_with_args(struct udevice *dev, const char *list_name,
-				const char *cells_name)
+int dev_count_phandle_with_args(const struct udevice *dev,
+				const char *list_name, const char *cells_name)
 {
 	return ofnode_count_phandle_with_args(dev_ofnode(dev), list_name,
 					      cells_name);
 }
 
-int dev_read_addr_cells(struct udevice *dev)
+int dev_read_addr_cells(const struct udevice *dev)
 {
 	return ofnode_read_addr_cells(dev_ofnode(dev));
 }
 
-int dev_read_size_cells(struct udevice *dev)
+int dev_read_size_cells(const struct udevice *dev)
 {
 	return ofnode_read_size_cells(dev_ofnode(dev));
 }
 
-int dev_read_simple_addr_cells(struct udevice *dev)
+int dev_read_simple_addr_cells(const struct udevice *dev)
 {
 	return ofnode_read_simple_addr_cells(dev_ofnode(dev));
 }
 
-int dev_read_simple_size_cells(struct udevice *dev)
+int dev_read_simple_size_cells(const struct udevice *dev)
 {
 	return ofnode_read_simple_size_cells(dev_ofnode(dev));
 }
 
-int dev_read_phandle(struct udevice *dev)
+int dev_read_phandle(const struct udevice *dev)
 {
 	ofnode node = dev_ofnode(dev);
 
@@ -233,12 +236,13 @@ int dev_read_phandle(struct udevice *dev)
 		return fdt_get_phandle(gd->fdt_blob, ofnode_to_offset(node));
 }
 
-const void *dev_read_prop(struct udevice *dev, const char *propname, int *lenp)
+const void *dev_read_prop(const struct udevice *dev, const char *propname,
+			  int *lenp)
 {
 	return ofnode_get_property(dev_ofnode(dev), propname, lenp);
 }
 
-int dev_read_alias_seq(struct udevice *dev, int *devnump)
+int dev_read_alias_seq(const struct udevice *dev, int *devnump)
 {
 	ofnode node = dev_ofnode(dev);
 	const char *uc_name = dev->uclass->uc_drv->name;
@@ -256,19 +260,19 @@ int dev_read_alias_seq(struct udevice *dev, int *devnump)
 	return ret;
 }
 
-int dev_read_u32_array(struct udevice *dev, const char *propname,
+int dev_read_u32_array(const struct udevice *dev, const char *propname,
 		       u32 *out_values, size_t sz)
 {
 	return ofnode_read_u32_array(dev_ofnode(dev), propname, out_values, sz);
 }
 
-const uint8_t *dev_read_u8_array_ptr(struct udevice *dev, const char *propname,
-				     size_t sz)
+const uint8_t *dev_read_u8_array_ptr(const struct udevice *dev,
+				     const char *propname, size_t sz)
 {
 	return ofnode_read_u8_array_ptr(dev_ofnode(dev), propname, sz);
 }
 
-int dev_read_enabled(struct udevice *dev)
+int dev_read_enabled(const struct udevice *dev)
 {
 	ofnode node = dev_ofnode(dev);
 
@@ -279,23 +283,24 @@ int dev_read_enabled(struct udevice *dev)
 					     ofnode_to_offset(node));
 }
 
-int dev_read_resource(struct udevice *dev, uint index, struct resource *res)
+int dev_read_resource(const struct udevice *dev, uint index,
+		      struct resource *res)
 {
 	return ofnode_read_resource(dev_ofnode(dev), index, res);
 }
 
-int dev_read_resource_byname(struct udevice *dev, const char *name,
+int dev_read_resource_byname(const struct udevice *dev, const char *name,
 			     struct resource *res)
 {
 	return ofnode_read_resource_byname(dev_ofnode(dev), name, res);
 }
 
-u64 dev_translate_address(struct udevice *dev, const fdt32_t *in_addr)
+u64 dev_translate_address(const struct udevice *dev, const fdt32_t *in_addr)
 {
 	return ofnode_translate_address(dev_ofnode(dev), in_addr);
 }
 
-u64 dev_translate_dma_address(struct udevice *dev, const fdt32_t *in_addr)
+u64 dev_translate_dma_address(const struct udevice *dev, const fdt32_t *in_addr)
 {
 	return ofnode_translate_dma_address(dev_ofnode(dev), in_addr);
 }
@@ -308,7 +313,7 @@ int dev_read_alias_highest_id(const char *stem)
 	return fdtdec_get_alias_highest_id(gd->fdt_blob, stem);
 }
 
-fdt_addr_t dev_read_addr_pci(struct udevice *dev)
+fdt_addr_t dev_read_addr_pci(const struct udevice *dev)
 {
 	ulong addr;