X-Git-Url: http://pilppa.org/gitweb/?a=blobdiff_plain;f=drivers%2Fi2c%2Fi2c-core.c;h=c6a63f46bc152796dbea5c5a930c44eed595f476;hb=20cfb41ba82d9dfc7f09451ab26e826a68a4c896;hp=b346a687ab593a89834270e64b91f2b8b1c4c66f;hpb=56f68556d7bbb51dd158c74deb09c783345bfbbd;p=linux-2.6-omap-h63xx.git

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index b346a687ab5..c6a63f46bc1 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -266,6 +266,9 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
 
 	client->dev.platform_data = info->platform_data;
 
+	if (info->archdata)
+		client->dev.archdata = *info->archdata;
+
 	client->flags = info->flags;
 	client->addr = info->addr;
 	client->irq = info->irq;
@@ -437,6 +440,10 @@ static int i2c_register_adapter(struct i2c_adapter *adap)
 {
 	int res = 0, dummy;
 
+	/* Can't register until after driver model init */
+	if (unlikely(WARN_ON(!i2c_bus_type.p)))
+		return -EAGAIN;
+
 	mutex_init(&adap->bus_lock);
 	mutex_init(&adap->clist_lock);
 	INIT_LIST_HEAD(&adap->clients);
@@ -624,7 +631,7 @@ int i2c_del_adapter(struct i2c_adapter *adap)
 
 	/* detach any active clients. This must be done first, because
 	 * it can fail; in which case we give up. */
-	list_for_each_entry_safe(client, _n, &adap->clients, list) {
+	list_for_each_entry_safe_reverse(client, _n, &adap->clients, list) {
 		struct i2c_driver	*driver;
 
 		driver = client->driver;
@@ -696,6 +703,10 @@ int i2c_register_driver(struct module *owner, struct i2c_driver *driver)
 {
 	int res;
 
+	/* Can't register until after driver model init */
+	if (unlikely(WARN_ON(!i2c_bus_type.p)))
+		return -EAGAIN;
+
 	/* new style driver methods can't mix with legacy ones */
 	if (is_newstyle_driver(driver)) {
 		if (driver->attach_adapter || driver->detach_adapter
@@ -978,7 +989,10 @@ static void __exit i2c_exit(void)
 	bus_unregister(&i2c_bus_type);
 }
 
-subsys_initcall(i2c_init);
+/* We must initialize early, because some subsystems register i2c drivers
+ * in subsys_initcall() code, but are linked (and initialized) before i2c.
+ */
+postcore_initcall(i2c_init);
 module_exit(i2c_exit);
 
 /* ----------------------------------------------------
@@ -1676,6 +1690,28 @@ s32 i2c_smbus_write_word_data(struct i2c_client *client, u8 command, u16 value)
 }
 EXPORT_SYMBOL(i2c_smbus_write_word_data);
 
+/**
+ * i2c_smbus_process_call - SMBus "process call" protocol
+ * @client: Handle to slave device
+ * @command: Byte interpreted by slave
+ * @value: 16-bit "word" being written
+ *
+ * This executes the SMBus "process call" protocol, returning negative errno
+ * else a 16-bit unsigned "word" received from the device.
+ */
+s32 i2c_smbus_process_call(struct i2c_client *client, u8 command, u16 value)
+{
+	union i2c_smbus_data data;
+	int status;
+	data.word = value;
+
+	status = i2c_smbus_xfer(client->adapter, client->addr, client->flags,
+				I2C_SMBUS_WRITE, command,
+				I2C_SMBUS_PROC_CALL, &data);
+	return (status < 0) ? status : data.word;
+}
+EXPORT_SYMBOL(i2c_smbus_process_call);
+
 /**
  * i2c_smbus_read_block_data - SMBus "block read" protocol
  * @client: Handle to slave device