[PATCH] openfirmware: generate device table for userspace

This converts the usage of struct of_match to struct of_device_id,
similar to pci_device_id.  This allows a device table to be generated,
which can be parsed by depmod(8) to generate a map file for module
loading.

In order for hotplug to work with macio devices, patches to
module-init-tools and hotplug must be applied.  Those patches are
available at:

 ftp://ftp.suse.com/pub/people/jeffm/linux/macio-hotplug/

Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

1 files changed, 22 insertions, 0 deletions

diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index 908bff6d1eef..5180405c1a84 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -25,6 +25,8 @@ typedef Elf64_Addr	kernel_ulong_t;
 #include <stdint.h>
 #endif
 
+#include <ctype.h>
+
 typedef uint32_t        __u32;
 typedef uint16_t        __u16;
 typedef unsigned char   __u8;
@@ -323,6 +325,22 @@ static int do_pcmcia_entry(const char *filename,
 
 
 
+static int do_of_entry (const char *filename, struct of_device_id *of, char *alias)
+{
+    char *tmp;
+    sprintf (alias, "of:N%sT%sC%s",
+                    of->name[0] ? of->name : "*",
+                    of->type[0] ? of->type : "*",
+                    of->compatible[0] ? of->compatible : "*");
+
+    /* Replace all whitespace with underscores */
+    for (tmp = alias; tmp && *tmp; tmp++)
+        if (isspace (*tmp))
+            *tmp = '_';
+
+    return 1;
+}
+
 /* Ignore any prefix, eg. v850 prepends _ */
 static inline int sym_is(const char *symbol, const char *name)
 {
@@ -401,6 +419,10 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
         else if (sym_is(symname, "__mod_pcmcia_device_table"))
                 do_table(symval, sym->st_size, sizeof(struct pcmcia_device_id),
                          do_pcmcia_entry, mod);
+        else if (sym_is(symname, "__mod_of_device_table"))
+                do_table(symval, sym->st_size, sizeof(struct of_device_id),
+                         do_of_entry, mod);
+
 }
 
 /* Now add out buffered information to the generated C source */