of/flattree: merge early_init_dt_scan_chosen()

Merge common code between PowerPC and Microblaze.  This patch
splits the arch-specific stuff out into a new function,
early_init_dt_scan_chosen_arch().

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Tested-by: Wolfram Sang <w.sang@pengutronix.de>
Acked-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

1 files changed, 38 insertions, 0 deletions

diff --git a/drivers/of/fdt.c b/drivers/of/fdt.c
index ebce509b0886..616a4767a950 100644
--- a/drivers/of/fdt.c
+++ b/drivers/of/fdt.c
@@ -15,6 +15,10 @@
 #include <linux/of.h>
 #include <linux/of_fdt.h>
 
+#ifdef CONFIG_PPC
+#include <asm/machdep.h>
+#endif /* CONFIG_PPC */
+
 int __initdata dt_root_addr_cells;
 int __initdata dt_root_size_cells;
 
@@ -440,6 +444,40 @@ u64 __init dt_mem_next_cell(int s, u32 **cellp)
         return of_read_number(p, s);
 }
 
+int __init early_init_dt_scan_chosen(unsigned long node, const char *uname,
+                                     int depth, void *data)
+{
+        unsigned long l;
+        char *p;
+
+        pr_debug("search \"chosen\", depth: %d, uname: %s\n", depth, uname);
+
+        if (depth != 1 ||
+            (strcmp(uname, "chosen") != 0 && strcmp(uname, "chosen@0") != 0))
+                return 0;
+
+        early_init_dt_check_for_initrd(node);
+
+        /* Retreive command line */
+        p = of_get_flat_dt_prop(node, "bootargs", &l);
+        if (p != NULL && l > 0)
+                strlcpy(cmd_line, p, min((int)l, COMMAND_LINE_SIZE));
+
+#ifdef CONFIG_CMDLINE
+#ifndef CONFIG_CMDLINE_FORCE
+        if (p == NULL || l == 0 || (l == 1 && (*p) == 0))
+#endif
+                strlcpy(cmd_line, CONFIG_CMDLINE, COMMAND_LINE_SIZE);
+#endif /* CONFIG_CMDLINE */
+
+        early_init_dt_scan_chosen_arch(node);
+
+        pr_debug("Command line is: %s\n", cmd_line);
+
+        /* break now */
+        return 1;
+}
+
 /**
  * unflatten_device_tree - create tree of device_nodes from flat blob
  *