[SCSI] fix netlink kernel-doc

[linux-2.6-omap-h63xx.git] / drivers / i2c / i2c-core.c

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 550853f79ae81dbba8399747423d87eb40bdd59d..42e852d79ffaa5b001dda2c44219cad064a537e7 100644 (file)
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -108,6 +108,9 @@ static int i2c_device_probe(struct device *dev)
        if (!driver->probe || !driver->id_table)
                return -ENODEV;
        client->driver = driver;
+       if (!device_can_wakeup(&client->dev))
+               device_init_wakeup(&client->dev,
+                                       client->flags & I2C_CLIENT_WAKE);
        dev_dbg(dev, "probe\n");
 
        status = driver->probe(client, i2c_match_id(driver->id_table, client));
@@ -262,9 +265,8 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
        client->adapter = adap;
 
        client->dev.platform_data = info->platform_data;
-       device_init_wakeup(&client->dev, info->flags & I2C_CLIENT_WAKE);
 
-       client->flags = info->flags & ~I2C_CLIENT_WAKE;
+       client->flags = info->flags;
        client->addr = info->addr;
        client->irq = info->irq;
 
@@ -435,6 +437,10 @@ 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);
@@ -694,6 +700,10 @@ 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
@@ -976,7 +986,10 @@ 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);
 
 /* ----------------------------------------------------
@@ -1188,8 +1201,8 @@ int i2c_probe(struct i2c_adapter *adapter,
                 && address_data->normal_i2c[0] == I2C_CLIENT_END)
                        return 0;
 
-               dev_warn(&adapter->dev, "SMBus Quick command not supported, "
-                        "can't probe for chips\n");
+               dev_dbg(&adapter->dev, "SMBus Quick command not supported, "
+                       "can't probe for chips\n");
                return -EOPNOTSUPP;
        }
 
@@ -1350,6 +1363,10 @@ static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver)
                }
        }
 
+       /* Stop here if the classes do not match */
+       if (!(adapter->class & driver->class))
+               goto exit_free;
+
        /* Stop here if we can't use SMBUS_QUICK */
        if (!i2c_check_functionality(adapter, I2C_FUNC_SMBUS_QUICK)) {
                if (address_data->probe[0] == I2C_CLIENT_END
@@ -1362,10 +1379,6 @@ static int i2c_detect(struct i2c_adapter *adapter, struct i2c_driver *driver)
                goto exit_free;
        }
 
-       /* Stop here if the classes do not match */
-       if (!(adapter->class & driver->class))
-               goto exit_free;
-
        /* Probe entries are done second, and are not affected by ignore
           entries either */
        for (i = 0; address_data->probe[i] != I2C_CLIENT_END; i += 2) {
@@ -1674,6 +1687,28 @@ 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