Patch for I2C transmit overflow error

[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 6c7fa8d53c0eeaeccfec0366302cdc37717efecb..d0175f4f8fc683941057bf4866e97a8a9abdcfd3 100644 (file)
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -48,6 +48,17 @@ static DEFINE_IDR(i2c_adapter_idr);
 
 /* ------------------------------------------------------------------------- */
 
+static const struct i2c_device_id *i2c_match_id(const struct i2c_device_id *id,
+                                               const struct i2c_client *client)
+{
+       while (id->name[0]) {
+               if (strcmp(client->name, id->name) == 0)
+                       return id;
+               id++;
+       }
+       return NULL;
+}
+
 static int i2c_device_match(struct device *dev, struct device_driver *drv)
 {
        struct i2c_client       *client = to_i2c_client(dev);
@@ -59,10 +70,11 @@ static int i2c_device_match(struct device *dev, struct device_driver *drv)
        if (!is_newstyle_driver(driver))
                return 0;
 
-       /* new style drivers use the same kind of driver matching policy
-        * as platform devices or SPI:  compare device and driver IDs.
-        */
-       return strcmp(client->driver_name, drv->name) == 0;
+       /* match on an id table if there is one */
+       if (driver->id_table)
+               return i2c_match_id(driver->id_table, client) != NULL;
+
+       return 0;
 }
 
 #ifdef CONFIG_HOTPLUG
@@ -73,10 +85,11 @@ static int i2c_device_uevent(struct device *dev, struct kobj_uevent_env *env)
        struct i2c_client       *client = to_i2c_client(dev);
 
        /* by definition, legacy drivers can't hotplug */
-       if (dev->driver || !client->driver_name)
+       if (dev->driver)
                return 0;
 
-       if (add_uevent_var(env, "MODALIAS=%s", client->driver_name))
+       if (add_uevent_var(env, "MODALIAS=%s%s",
+                          I2C_MODULE_PREFIX, client->name))
                return -ENOMEM;
        dev_dbg(dev, "uevent\n");
        return 0;
@@ -90,13 +103,19 @@ static int i2c_device_probe(struct device *dev)
 {
        struct i2c_client       *client = to_i2c_client(dev);
        struct i2c_driver       *driver = to_i2c_driver(dev->driver);
+       const struct i2c_device_id *id;
        int status;
 
        if (!driver->probe)
                return -ENODEV;
        client->driver = driver;
        dev_dbg(dev, "probe\n");
-       status = driver->probe(client);
+
+       if (driver->id_table)
+               id = i2c_match_id(driver->id_table, client);
+       else
+               id = NULL;
+       status = driver->probe(client, id);
        if (status)
                client->driver = NULL;
        return status;
@@ -179,9 +198,7 @@ static ssize_t show_client_name(struct device *dev, struct device_attribute *att
 static ssize_t show_modalias(struct device *dev, struct device_attribute *attr, char *buf)
 {
        struct i2c_client *client = to_i2c_client(dev);
-       return client->driver_name
-               ? sprintf(buf, "%s\n", client->driver_name)
-               : 0;
+       return sprintf(buf, "%s%s\n", I2C_MODULE_PREFIX, client->name);
 }
 
 static struct device_attribute i2c_dev_attrs[] = {
@@ -255,8 +272,6 @@ i2c_new_device(struct i2c_adapter *adap, struct i2c_board_info const *info)
        client->addr = info->addr;
        client->irq = info->irq;
 
-       strlcpy(client->driver_name, info->driver_name,
-               sizeof(client->driver_name));
        strlcpy(client->name, info->type, sizeof(client->name));
 
        /* a new style driver may be bound to this device when we
@@ -300,22 +315,33 @@ void i2c_unregister_device(struct i2c_client *client)
 EXPORT_SYMBOL_GPL(i2c_unregister_device);
 
 
-static int dummy_nop(struct i2c_client *client)
+static const struct i2c_device_id dummy_id[] = {
+       { "dummy", 0 },
+       { },
+};
+
+static int dummy_probe(struct i2c_client *client,
+                      const struct i2c_device_id *id)
+{
+       return 0;
+}
+
+static int dummy_remove(struct i2c_client *client)
 {
        return 0;
 }
 
 static struct i2c_driver dummy_driver = {
        .driver.name    = "dummy",
-       .probe          = dummy_nop,
-       .remove         = dummy_nop,
+       .probe          = dummy_probe,
+       .remove         = dummy_remove,
+       .id_table       = dummy_id,
 };
 
 /**
  * i2c_new_dummy - return a new i2c device bound to a dummy driver
  * @adapter: the adapter managing the device
  * @address: seven bit address to be used
- * @type: optional label used for i2c_client.name
  * Context: can sleep
  *
  * This returns an I2C client bound to the "dummy" driver, intended for use
@@ -331,15 +357,12 @@ static struct i2c_driver dummy_driver = {
  * i2c_unregister_device(); or NULL to indicate an error.
  */
 struct i2c_client *
-i2c_new_dummy(struct i2c_adapter *adapter, u16 address, const char *type)
+i2c_new_dummy(struct i2c_adapter *adapter, u16 address)
 {
        struct i2c_board_info info = {
-               .driver_name    = "dummy",
-               .addr           = address,
+               I2C_BOARD_INFO("dummy", address),
        };
 
-       if (type)
-               strlcpy(info.type, type, sizeof info.type);
        return i2c_new_device(adapter, &info);
 }
 EXPORT_SYMBOL_GPL(i2c_new_dummy);