[PATCH] I2C: add i2c module alias for i2c drivers to use

This is the start of adding hotplug-like support for i2c devices.

Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

3 files changed, 16 insertions, 0 deletions

diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 32977fb1d99a..f88577ca3b3a 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -29,6 +29,7 @@
 #include <linux/module.h>
 #include <linux/types.h>
 #include <linux/i2c-id.h>
+#include <linux/mod_devicetable.h>
 #include <linux/device.h>       /* for struct device */
 #include <asm/semaphore.h>
 
diff --git a/include/linux/mod_devicetable.h b/include/linux/mod_devicetable.h
index 2f0299a448f6..7b08c11ec4cc 100644
--- a/include/linux/mod_devicetable.h
+++ b/include/linux/mod_devicetable.h
@@ -244,4 +244,9 @@ struct pcmcia_device_id {
 #define PCMCIA_DEV_ID_MATCH_FAKE_CIS    0x0200
 #define PCMCIA_DEV_ID_MATCH_ANONYMOUS   0x0400
 
+/* I2C */
+struct i2c_device_id {
+        __u16 id;
+};
+
 #endif /* LINUX_MOD_DEVICETABLE_H */
diff --git a/scripts/mod/file2alias.c b/scripts/mod/file2alias.c
index f2ee673329a7..e3d144a3f10b 100644
--- a/scripts/mod/file2alias.c
+++ b/scripts/mod/file2alias.c
@@ -359,6 +359,13 @@ static int do_vio_entry(const char *filename, struct vio_device_id *vio,
         return 1;
 }
 
+static int do_i2c_entry(const char *filename, struct i2c_device_id *i2c, char *alias)
+{
+        strcpy(alias, "i2c:");
+        ADD(alias, "id", 1, i2c->id);
+        return 1;
+}
+
 /* Ignore any prefix, eg. v850 prepends _ */
 static inline int sym_is(const char *symbol, const char *name)
 {
@@ -443,6 +450,9 @@ void handle_moddevtable(struct module *mod, struct elf_info *info,
         else if (sym_is(symname, "__mod_vio_device_table"))
                 do_table(symval, sym->st_size, sizeof(struct vio_device_id),
                          do_vio_entry, mod);
+        else if (sym_is(symname, "__mod_i2c_device_table"))
+                do_table(symval, sym->st_size, sizeof(struct i2c_device_id),
+                         do_i2c_entry, mod);
 
 }