we need different bus types

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

include/driver.h

@@ -68,6 +68,7 @@
 /*@{*/	/* do not delete, doxygen relevant */
 
 struct filep;
+struct bus_type;
 
 /** @brief Describes a particular device present in the system */
 struct device_d {
@@ -110,6 +111,7 @@ struct device_d {
 	/*! This describes the type (or class) of this device. Have a look at
 	 * include/driver.h to see a list of known device types. Currently this
 	 * includes DEVICE_TYPE_ETHER, DEVICE_TYPE_CONSOLE and others. */
+	struct bus_type *bus;
 	unsigned long type;
 
 	/*! The parameters for this device. This is used to carry information
@@ -151,6 +153,7 @@ struct driver_d {
 	void    (*shortinfo) (struct device_d *);
 
 	unsigned long type;
+	struct bus_type *bus;
 
 	/*! This is somewhat redundant with the type data in struct device.
 	 * Currently the filesystem implementation uses this field while
@@ -273,7 +276,7 @@ static inline int dev_close_default(struct device_d *dev, struct filep *f)
 extern const char *dev_id(const struct device_d *dev);
 
 #define dev_printf(dev, format, arg...)	\
-	printf("%s@%s: " format , dev->name , \
+	printf("%s@%s: " format , (dev)->name , \
 	       dev_id(dev) , ## arg)
 
 #define dev_emerg(dev, format, arg...)		\
@@ -299,5 +302,15 @@ extern const char *dev_id(const struct device_d *dev);
 	({ if (0) dev_printf((dev), format, ##arg); 0; })
 #endif
 
+struct bus_type {
+	char *name;
+	int (*match)(struct device_d *dev, struct driver_d *drv);
+	int (*probe)(struct device_d *dev);
+	void (*remove)(struct device_d *dev);
+
+	struct list_head list;
+};
+
+extern struct bus_type platform_bus;
 #endif /* DRIVER_H */
 

lib/Makefile

@@ -6,6 +6,7 @@ obj-y			+= vsprintf.o
 obj-y			+= div64.o
 obj-y			+= misc.o
 obj-y			+= driver.o
+obj-y			+= bus.o
 obj-y			+= parameter.o
 obj-y			+= xfuncs.o
 obj-y			+= getopt.o

lib/bus.c

@@ -0,0 +1,58 @@
+/*
+ * bus.c - U-Boot driver model
+ *
+ * Copyright (c) 2009 Sascha Hauer <s.hauer@pengutronix.de>, Pengutronix
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+#include <common.h>
+#include <driver.h>
+
+static int platform_match(struct device_d *dev, struct driver_d *drv)
+{
+	return strcmp(dev->name, drv->name) ? -1 : 0;
+}
+
+static int platform_probe(struct device_d *dev)
+{
+	return dev->driver->probe(dev);
+}
+
+static int platform_remove(struct device_d *dev)
+{
+	return dev->driver->remove(dev);
+}
+
+struct bus_type platform_bus = {
+	.name = "platform",
+	.match = platform_match,
+	.probe = platform_probe,
+	.remove = platform_remove,
+};
+
+#if 0
+LIST_HEAD(bus_list);
+EXPORT_SYMBOL(bus_list);
+
+int bus_register(struct bus_type *bus)
+{
+	list_add_tail(&bus->list, &bus_list);
+
+	return 0;
+}
+#endif
+

lib/driver.c

@@ -70,18 +70,21 @@ int get_free_deviceid(char *id, const char *id_template)
 
 static int match(struct driver_d *drv, struct device_d *dev)
 {
-	if (strcmp(dev->name, drv->name))
-		return -1;
-	if (dev->type != drv->type)
-		return -1;
-	if(drv->probe(dev))
-		return -1;
-
 	dev->driver = drv;
 
+	if (dev->bus != drv->bus)
+		goto err_out;
+	if (dev->bus->match(dev, drv))
+		goto err_out;
+	if (dev->bus->probe(dev))
+		goto err_out;
+
 	list_add(&dev->active, &active);
 
 	return 0;
+err_out:
+	dev->driver = NULL;
+	return -1;
 }
 
 int register_device(struct device_d *new_device)
@@ -94,6 +97,11 @@ int register_device(struct device_d *new_device)
 	}
 	debug ("register_device: %s\n",new_device->name);
 
+	if (!new_device->bus) {
+//		dev_err(new_device, "no bus type associated. Needs fixup\n");
+		new_device->bus = &platform_bus;
+	}
+
 	list_add_tail(&new_device->list, &device_list);
 	INIT_LIST_HEAD(&new_device->children);
 
@@ -165,6 +173,11 @@ int register_driver(struct driver_d *drv)
 
 	debug("register_driver: %s\n", drv->name);
 
+	if (!drv->bus) {
+//		pr_err("driver %s has no bus type associated. Needs fixup\n", drv->name);
+		drv->bus = &platform_bus;
+	}
+
 	list_add_tail(&drv->list, &driver_list);
 
 	if (!drv->info)