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>

diff --git a/drivers/i2c/busses/i2c-bfin-twi.c b/drivers/i2c/busses/i2c-bfin-twi.c
index 40136ea..26d8987 100644 (file)
--- 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 = {