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authorJean Delvare <khali@linux-fr.org>2007-05-01 17:26:34 -0400
committerJean Delvare <khali@hyperion.delvare>2007-05-01 17:26:34 -0400
commitb86a1bc8e39641d0c4676943b77a3486ee296db8 (patch)
tree19041f82e3322c4779845152ff00732fff60e7ff /drivers/i2c/i2c-core.c
parent7d054817b780e664bed6701b2aa637718e1905b7 (diff)
i2c: Restore i2c_smbus_read_block_data
Add back the i2c_smbus_read_block_data helper function, it is needed by the upcoming lm93 hardware monitoring driver and possibly others. Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'drivers/i2c/i2c-core.c')
-rw-r--r--drivers/i2c/i2c-core.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/drivers/i2c/i2c-core.c b/drivers/i2c/i2c-core.c
index a58f89a6418..64f8e56d300 100644
--- a/drivers/i2c/i2c-core.c
+++ b/drivers/i2c/i2c-core.c
@@ -1298,6 +1298,22 @@ s32 i2c_smbus_write_word_data(struct i2c_client *client, u8 command, u16 value)
1298} 1298}
1299EXPORT_SYMBOL(i2c_smbus_write_word_data); 1299EXPORT_SYMBOL(i2c_smbus_write_word_data);
1300 1300
1301/* Returns the number of read bytes */
1302s32 i2c_smbus_read_block_data(struct i2c_client *client, u8 command,
1303 u8 *values)
1304{
1305 union i2c_smbus_data data;
1306
1307 if (i2c_smbus_xfer(client->adapter, client->addr, client->flags,
1308 I2C_SMBUS_READ, command,
1309 I2C_SMBUS_BLOCK_DATA, &data))
1310 return -1;
1311
1312 memcpy(values, &data.block[1], data.block[0]);
1313 return data.block[0];
1314}
1315EXPORT_SYMBOL(i2c_smbus_read_block_data);
1316
1301s32 i2c_smbus_write_block_data(struct i2c_client *client, u8 command, 1317s32 i2c_smbus_write_block_data(struct i2c_client *client, u8 command,
1302 u8 length, const u8 *values) 1318 u8 length, const u8 *values)
1303{ 1319{