mmc: add SDIO driver handling

Add basic driver handling to the SDIO device model.
Signed-off-by: Pierre Ossman <drzeus@drzeus.cx>

drivers/mmc/core/sdio_bus.c

@@ -67,6 +67,29 @@ void sdio_unregister_bus(void)
 	bus_unregister(&sdio_bus_type);
 }
 
+/**
+ *	sdio_register_driver - register a function driver
+ *	@drv: SDIO function driver
+ */
+int sdio_register_driver(struct sdio_driver *drv)
+{
+	drv->drv.name = drv->name;
+	drv->drv.bus = &sdio_bus_type;
+	return driver_register(&drv->drv);
+}
+EXPORT_SYMBOL_GPL(sdio_register_driver);
+
+/**
+ *	sdio_unregister_driver - unregister a function driver
+ *	@drv: SDIO function driver
+ */
+void sdio_unregister_driver(struct sdio_driver *drv)
+{
+	drv->drv.bus = &sdio_bus_type;
+	driver_unregister(&drv->drv);
+}
+EXPORT_SYMBOL_GPL(sdio_unregister_driver);
+
 static void sdio_release_func(struct device *dev)
 {
 	struct sdio_func *func = dev_to_sdio_func(dev);

include/linux/mmc/sdio_func.h

@@ -31,5 +31,23 @@ struct sdio_func {
 
 #define sdio_func_id(f)		((f)->dev.bus_id)
 
+#define sdio_get_drvdata(f)	dev_get_drvdata(&(f)->dev)
+#define sdio_set_drvdata(f,d)	dev_set_drvdata(&(f)->dev, d)
+
+/*
+ * SDIO function device driver
+ */
+struct sdio_driver {
+	char *name;
+
+	int (*probe)(struct sdio_func *);
+	void (*remove)(struct sdio_func *);
+
+	struct device_driver drv;
+};
+
+extern int sdio_register_driver(struct sdio_driver *);
+extern void sdio_unregister_driver(struct sdio_driver *);
+
 #endif