[PATCH] I2C: Resurrect i2c_smbus_write_i2c_block_data.

Signed-off-by: Jean Delvare <khali@linux-fr.org>

2 files changed, 18 insertions, 0 deletions

diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index 0ce58b506046..1a2c9ab5d9e3 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -946,6 +946,20 @@ s32 i2c_smbus_read_i2c_block_data(struct i2c_client *client, u8 command, u8 *val
         }
 }
 
+s32 i2c_smbus_write_i2c_block_data(struct i2c_client *client, u8 command,
+                                   u8 length, u8 *values)
+{
+        union i2c_smbus_data data;
+
+        if (length > I2C_SMBUS_BLOCK_MAX)
+                length = I2C_SMBUS_BLOCK_MAX;
+        data.block[0] = length;
+        memcpy(data.block + 1, values, length);
+        return i2c_smbus_xfer(client->adapter, client->addr, client->flags,
+                              I2C_SMBUS_WRITE, command,
+                              I2C_SMBUS_I2C_BLOCK_DATA, &data);
+}
+
 /* Simulate a SMBus command using the i2c protocol 
    No checking of parameters is done!  */
 static s32 i2c_smbus_xfer_emulated(struct i2c_adapter * adapter, u16 addr, 
@@ -1150,6 +1164,7 @@ EXPORT_SYMBOL(i2c_smbus_read_word_data);
 EXPORT_SYMBOL(i2c_smbus_write_word_data);
 EXPORT_SYMBOL(i2c_smbus_write_block_data);
 EXPORT_SYMBOL(i2c_smbus_read_i2c_block_data);
+EXPORT_SYMBOL(i2c_smbus_write_i2c_block_data);
 
 MODULE_AUTHOR("Simon G. Vogl <simon@tk.uni-linz.ac.at>");
 MODULE_DESCRIPTION("I2C-Bus main module");
diff --git a/include/linux/i2c.h b/include/linux/i2c.h
index 7863a59bd598..63f1d63cc1d8 100644
--- a/include/linux/i2c.h
+++ b/include/linux/i2c.h
@@ -100,6 +100,9 @@ extern s32 i2c_smbus_write_block_data(struct i2c_client * client,
 /* Returns the number of read bytes */
 extern s32 i2c_smbus_read_i2c_block_data(struct i2c_client * client,
                                          u8 command, u8 *values);
+extern s32 i2c_smbus_write_i2c_block_data(struct i2c_client * client,
+                                          u8 command, u8 length,
+                                          u8 *values);
 
 /*
  * A driver is capable of handling one or more physical devices present on