i2c: Blackfin TWI: implement I2C_FUNC_SMBUS_I2C_BLOCK functionality

Some drivers need i2c_smbus_read_i2c_block_data() functionality, so add
support for it to the Blackfin I2C bus driver.

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
[ben-linux@fluff.org: shortened subject]
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 11 insertions, 1 deletions

diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index 40136ea7a46f..26d8987e69bf 100644
--- a/drivers/i2c/busses/i2c-bfin-twi.c
+++ b/drivers/i2c/busses/i2c-bfin-twi.c
@@ -449,6 +449,16 @@ int bfin_twi_smbus_xfer(struct i2c_adapter *adap, u16 addr,
                 }
                 iface->transPtr = data->block;
                 break;
+        case I2C_SMBUS_I2C_BLOCK_DATA:
+                if (read_write == I2C_SMBUS_READ) {
+                        iface->readNum = data->block[0];
+                        iface->cur_mode = TWI_I2C_MODE_COMBINED;
+                } else {
+                        iface->writeNum = data->block[0];
+                        iface->cur_mode = TWI_I2C_MODE_STANDARDSUB;
+                }
+                iface->transPtr = (u8 *)&data->block[1];
+                break;
         default:
                 return -1;
         }
@@ -572,7 +582,7 @@ static u32 bfin_twi_functionality(struct i2c_adapter *adap)
         return I2C_FUNC_SMBUS_QUICK | I2C_FUNC_SMBUS_BYTE |
                I2C_FUNC_SMBUS_BYTE_DATA | I2C_FUNC_SMBUS_WORD_DATA |
                I2C_FUNC_SMBUS_BLOCK_DATA | I2C_FUNC_SMBUS_PROC_CALL |
-               I2C_FUNC_I2C;
+               I2C_FUNC_I2C | I2C_FUNC_SMBUS_I2C_BLOCK;
 }
 
 static struct i2c_algorithm bfin_twi_algorithm = {