drivercore: Add of_match_table to the common device drivers

OF-style matching can be available to any device, on any type of bus.
This patch allows any driver to provide an OF match table when CONFIG_OF
is enabled so that drivers can be bound against devices described in
the device tree.

Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>

4 files changed, 14 insertions, 7 deletions

diff --git a/arch/powerpc/kernel/ibmebus.c b/arch/powerpc/kernel/ibmebus.c
index a9f31631a293..355257bb149d 100644
--- a/arch/powerpc/kernel/ibmebus.c
+++ b/arch/powerpc/kernel/ibmebus.c
@@ -201,8 +201,11 @@ static int ibmebus_create_devices(const struct of_device_id *matches)
 
 int ibmebus_register_driver(struct of_platform_driver *drv)
 {
+        if (!drv->driver.of_match_table)
+                drv->driver.of_match_table = drv->match_table;
+
         /* If the driver uses devices that ibmebus doesn't know, add them */
-        ibmebus_create_devices(drv->match_table);
+        ibmebus_create_devices(drv->driver.of_match_table);
 
         return of_register_driver(drv, &ibmebus_bus_type);
 }
diff --git a/drivers/macintosh/macio_asic.c b/drivers/macintosh/macio_asic.c
index 48a5f0406865..e3ba1d8001a3 100644
--- a/drivers/macintosh/macio_asic.c
+++ b/drivers/macintosh/macio_asic.c
@@ -40,8 +40,7 @@ static struct macio_chip      *macio_on_hold;
 static int macio_bus_match(struct device *dev, struct device_driver *drv) 
 {
         struct macio_dev * macio_dev = to_macio_device(dev);
-        struct macio_driver * macio_drv = to_macio_driver(drv);
-        const struct of_device_id * matches = macio_drv->match_table;
+        const struct of_device_id * matches = drv->of_match_table;
 
         if (!matches) 
                 return 0;
@@ -84,7 +83,7 @@ static int macio_device_probe(struct device *dev)
 
         macio_dev_get(macio_dev);
 
-        match = of_match_device(drv->match_table, &macio_dev->ofdev);
+        match = of_match_device(drv->driver.of_match_table, &macio_dev->ofdev);
         if (match)
                 error = drv->probe(macio_dev, match);
         if (error)
diff --git a/drivers/of/platform.c b/drivers/of/platform.c
index d58ade170c4b..9fd7f7d0a0d1 100644
--- a/drivers/of/platform.c
+++ b/drivers/of/platform.c
@@ -22,8 +22,7 @@ extern struct device_attribute of_platform_device_attrs[];
 static int of_platform_bus_match(struct device *dev, struct device_driver *drv)
 {
         struct of_device *of_dev = to_of_device(dev);
-        struct of_platform_driver *of_drv = to_of_platform_driver(drv);
-        const struct of_device_id *matches = of_drv->match_table;
+        const struct of_device_id *matches = drv->of_match_table;
 
         if (!matches)
                 return 0;
@@ -46,7 +45,7 @@ static int of_platform_device_probe(struct device *dev)
 
         of_dev_get(of_dev);
 
-        match = of_match_device(drv->match_table, of_dev);
+        match = of_match_device(drv->driver.of_match_table, of_dev);
         if (match)
                 error = drv->probe(of_dev, match);
         if (error)
@@ -391,6 +390,8 @@ int of_register_driver(struct of_platform_driver *drv, struct bus_type *bus)
                 drv->driver.name = drv->name;
         if (!drv->driver.owner)
                 drv->driver.owner = drv->owner;
+        if (!drv->driver.of_match_table)
+                drv->driver.of_match_table = drv->match_table;
         drv->driver.bus = bus;
 
         /* register with core */
diff --git a/include/linux/device.h b/include/linux/device.h
index 7a968bdb02e2..cd7534cc42ab 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -129,6 +129,10 @@ struct device_driver {
 
         bool suppress_bind_attrs;       /* disables bind/unbind via sysfs */
 
+#if defined(CONFIG_OF)
+        const struct of_device_id       *of_match_table;
+#endif
+
         int (*probe) (struct device *dev);
         int (*remove) (struct device *dev);
         void (*shutdown) (struct device *dev);