dm: replace dm_dbg() with pr_debug()

As we discussed before in ML, dm_dbg() causes undefined reference
error if #define DEBUG is added to users, but not drivers/core/util.c

We do not need this macro because we can use pr_debug() instead, and
it is pretty easy to enable it for the DM core by using ccflags-y.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>

drivers/core/Kconfig

@@ -45,6 +45,12 @@ config DM_WARN
 	  This will cause dm_warn() to be compiled out - it will do nothing
 	  when called.
 
+config DM_DEBUG
+	bool "Enable debug messages in driver model core"
+	depends on DM
+	help
+	  Say Y here if you want to compile in debug messages in DM core.
+
 config DM_DEVICE_REMOVE
 	bool "Support device removal"
 	depends on DM

drivers/core/Makefile

@@ -16,3 +16,5 @@ ifndef CONFIG_DM_DEV_READ_INLINE
 obj-$(CONFIG_OF_CONTROL) += read.o
 endif
 obj-$(CONFIG_OF_CONTROL) += of_extra.o ofnode.o read_extra.o
+
+ccflags-$(CONFIG_DM_DEBUG) += -DDEBUG

drivers/core/device.c

@@ -161,7 +161,7 @@ static int device_bind_common(struct udevice *parent, const struct driver *drv,
 	}
 
 	if (parent)
-		dm_dbg("Bound device %s to %s\n", dev->name, parent->name);
+		pr_debug("Bound device %s to %s\n", dev->name, parent->name);
 	if (devp)
 		*devp = dev;
 

drivers/core/lists.c

@@ -139,12 +139,13 @@ int lists_bind_fdt(struct udevice *parent, ofnode node, struct udevice **devp)
 	if (devp)
 		*devp = NULL;
 	name = ofnode_get_name(node);
-	dm_dbg("bind node %s\n", name);
+	pr_debug("bind node %s\n", name);
 
 	compat_list = ofnode_get_property(node, "compatible", &compat_length);
 	if (!compat_list) {
 		if (compat_length == -FDT_ERR_NOTFOUND) {
-			dm_dbg("Device '%s' has no compatible string\n", name);
+			pr_debug("Device '%s' has no compatible string\n",
+				 name);
 			return 0;
 		}
 
@@ -159,8 +160,8 @@ int lists_bind_fdt(struct udevice *parent, ofnode node, struct udevice **devp)
 	 */
 	for (i = 0; i < compat_length; i += strlen(compat) + 1) {
 		compat = compat_list + i;
-		dm_dbg("   - attempt to match compatible string '%s'\n",
-		       compat);
+		pr_debug("   - attempt to match compatible string '%s'\n",
+			 compat);
 
 		for (entry = driver; entry != driver + n_ents; entry++) {
 			ret = driver_check_compatible(entry->of_match, &id,
@@ -171,11 +172,11 @@ int lists_bind_fdt(struct udevice *parent, ofnode node, struct udevice **devp)
 		if (entry == driver + n_ents)
 			continue;
 
-		dm_dbg("   - found match at '%s'\n", entry->name);
+		pr_debug("   - found match at '%s'\n", entry->name);
 		ret = device_bind_with_driver_data(parent, entry, name,
 						   id->data, node, &dev);
 		if (ret == -ENODEV) {
-			dm_dbg("Driver '%s' refuses to bind\n", entry->name);
+			pr_debug("Driver '%s' refuses to bind\n", entry->name);
 			continue;
 		}
 		if (ret) {
@@ -191,7 +192,7 @@ int lists_bind_fdt(struct udevice *parent, ofnode node, struct udevice **devp)
 	}
 
 	if (!found && !result && ret != -ENODEV)
-		dm_dbg("No match for node '%s'\n", name);
+		pr_debug("No match for node '%s'\n", name);
 
 	return result;
 }

drivers/core/root.c

@@ -227,7 +227,7 @@ static int dm_scan_fdt_live(struct udevice *parent,
 		    !of_find_property(np, "u-boot,dm-pre-reloc", NULL))
 			continue;
 		if (!of_device_is_available(np)) {
-			dm_dbg("   - ignoring disabled device\n");
+			pr_debug("   - ignoring disabled device\n");
 			continue;
 		}
 		err = lists_bind_fdt(parent, np_to_ofnode(np), NULL);
@@ -270,7 +270,7 @@ static int dm_scan_fdt_node(struct udevice *parent, const void *blob,
 		    !dm_fdt_pre_reloc(blob, offset))
 			continue;
 		if (!fdtdec_get_is_enabled(blob, offset)) {
-			dm_dbg("   - ignoring disabled device\n");
+			pr_debug("   - ignoring disabled device\n");
 			continue;
 		}
 		err = lists_bind_fdt(parent, offset_to_ofnode(offset), NULL);

drivers/core/util.c

@@ -20,17 +20,6 @@ void dm_warn(const char *fmt, ...)
 }
 #endif
 
-#ifdef DEBUG
-void dm_dbg(const char *fmt, ...)
-{
-	va_list args;
-
-	va_start(args, fmt);
-	vprintf(fmt, args);
-	va_end(args);
-}
-#endif
-
 int list_count_items(struct list_head *head)
 {
 	struct list_head *node;

include/dm/util.h

@@ -15,14 +15,6 @@ static inline void dm_warn(const char *fmt, ...)
 }
 #endif
 
-#ifdef DEBUG
-void dm_dbg(const char *fmt, ...);
-#else
-static inline void dm_dbg(const char *fmt, ...)
-{
-}
-#endif
-
 struct list_head;
 
 /**