From mboxrd@z Thu Jan  1 00:00:00 1970
From: Felix Rubinstein <felixru-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: Intel ICHx bus driver
Date: Wed, 27 Jan 2010 19:56:02 +0200
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Running i2cdetect on ICH9 says:
"I2C Block Write =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0 =A0yes"

But having a closer look at how the whole thing is implemented proves
that no i2c block write is supported.

The proof:
1. i801_probe turns i801_features to FEATURE_I2C_BLOCK_READ
2. as a sequence in i801_block_transaction
i801_block_transaction_byte_by_byte is called
3. on the other hand i801_block_transaction_byte_by_byte does
=A0 =A0if (read_write =3D=3D I2C_SMBUS_WRITE)
=A0 =A0 =A0 =A0 =A0 =A0 =A0 outb_p(len, SMBHSTDAT0);
meaning SMBus length.

But what if I want to write I2C's multi-block (without length or even
command before)?
I cannot understand why i801_func turns on I2C_FUNC_SMBUS_WRITE_I2C_BLO=
CK?

Thanks,
=46elix R.