Merge branch 'devicetree/next-overlay' into devicetree/next

[cascardo/linux.git] / drivers / of / base.c

diff --git a/drivers/of/base.c b/drivers/of/base.c
index a7ad101..d8574ad 100644 (file)
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -17,6 +17,7 @@
  *      as published by the Free Software Foundation; either version
  *      2 of the License, or (at your option) any later version.
  */
+#include <linux/console.h>
 #include <linux/ctype.h>
 #include <linux/cpu.h>
 #include <linux/module.h>
@@ -35,7 +36,7 @@ struct device_node *of_allnodes;
 EXPORT_SYMBOL(of_allnodes);
 struct device_node *of_chosen;
 struct device_node *of_aliases;
-static struct device_node *of_stdout;
+struct device_node *of_stdout;
 
 struct kset *of_kset;
 
@@ -1851,9 +1852,12 @@ void of_alias_scan(void * (*dt_alloc)(u64 size, u64 align))
                of_chosen = of_find_node_by_path("/chosen@0");
 
        if (of_chosen) {
+               /* linux,stdout-path and /aliases/stdout are for legacy compatibility */
                const char *name = of_get_property(of_chosen, "stdout-path", NULL);
                if (!name)
                        name = of_get_property(of_chosen, "linux,stdout-path", NULL);
+               if (IS_ENABLED(CONFIG_PPC) && !name)
+                       name = of_get_property(of_aliases, "stdout", NULL);
                if (name)
                        of_stdout = of_find_node_by_path(name);
        }
@@ -1969,20 +1973,22 @@ const char *of_prop_next_string(struct property *prop, const char *cur)
 EXPORT_SYMBOL_GPL(of_prop_next_string);
 
 /**
- * of_device_is_stdout_path - check if a device node matches the
- *                            linux,stdout-path property
- *
- * Check if this device node matches the linux,stdout-path property
- * in the chosen node. return true if yes, false otherwise.
+ * of_console_check() - Test and setup console for DT setup
+ * @dn - Pointer to device node
+ * @name - Name to use for preferred console without index. ex. "ttyS"
+ * @index - Index to use for preferred console.
+ *
+ * Check if the given device node matches the stdout-path property in the
+ * /chosen node. If it does then register it as the preferred console and return
+ * TRUE. Otherwise return FALSE.
  */
-int of_device_is_stdout_path(struct device_node *dn)
+bool of_console_check(struct device_node *dn, char *name, int index)
 {
-       if (!of_stdout)
+       if (!dn || dn != of_stdout || console_set_on_cmdline)
                return false;
-
-       return of_stdout == dn;
+       return add_preferred_console(name, index, NULL);
 }
-EXPORT_SYMBOL_GPL(of_device_is_stdout_path);
+EXPORT_SYMBOL_GPL(of_console_check);
 
 /**
  *     of_find_next_cache_node - Find a node's subsidiary cache