i2c-algo-bit: Add i2c_bit_add_numbered_bus

Add i2c_bit_add_numbered_bus(), which is equivalent to i2c_bit_add_bus
except that it calls i2c_add_numbered_adapter() at the end instead of
i2c_add_adapter().
Signed-off-by: Jean Delvare <khali@linux-fr.org>

drivers/i2c/algos/i2c-algo-bit.c

@@ -540,7 +540,7 @@ static const struct i2c_algorithm i2c_bit_algo = {
 /* 
  * registering functions to load algorithms at runtime 
  */
-int i2c_bit_add_bus(struct i2c_adapter *adap)
+static int i2c_bit_prepare_bus(struct i2c_adapter *adap)
 {
 	struct i2c_algo_bit_data *bit_adap = adap->algo_data;
 
@@ -558,10 +558,33 @@ int i2c_bit_add_bus(struct i2c_adapter *adap)
 	adap->timeout = 100;	/* default values, should	*/
 	adap->retries = 3;	/* be replaced by defines	*/
 
+	return 0;
+}
+
+int i2c_bit_add_bus(struct i2c_adapter *adap)
+{
+	int err;
+
+	err = i2c_bit_prepare_bus(adap);
+	if (err)
+		return err;
+
 	return i2c_add_adapter(adap);
 }
 EXPORT_SYMBOL(i2c_bit_add_bus);
 
+int i2c_bit_add_numbered_bus(struct i2c_adapter *adap)
+{
+	int err;
+
+	err = i2c_bit_prepare_bus(adap);
+	if (err)
+		return err;
+
+	return i2c_add_numbered_adapter(adap);
+}
+EXPORT_SYMBOL(i2c_bit_add_numbered_bus);
+
 MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>");
 MODULE_DESCRIPTION("I2C-Bus bit-banging algorithm");
 MODULE_LICENSE("GPL");

include/linux/i2c-algo-bit.h

@@ -44,5 +44,6 @@ struct i2c_algo_bit_data {
 };
 
 int i2c_bit_add_bus(struct i2c_adapter *);
+int i2c_bit_add_numbered_bus(struct i2c_adapter *);
 
 #endif /* _LINUX_I2C_ALGO_BIT_H */