[PATCH] <SMBus block read I2C emulation>, <i2c-2.8.1>

[Liu Tao]

Hello!

Here is the patch to support SMBus Block Read and SMBus Block Process Call
protocols under I2C emulation. It adds the I2C_M_RECV_LEN flag. 

To support the two protocols, an algorithm driver should handle the 
I2C_M_RECV_LEN flag in its master_xfer routin, and return
I2C_FUNC_SMBUS_EMUL | I2C_FUNC_SMBUS_READ_BLOCK_DATA or
I2C_FUNC_SMBUS_EMUL | I2C_FUNC_SMBUS_BLOCK_PROC_CALL
in its functionality routin.

Existing algorithm drivers won't be affected by this patch.

-- 
Regards,
Liu Tao
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