[PATCH] i2c-viapro: Implement I2C Block transactions

Implement the I2C block transactions on VIA chips which support them:
VT82C686B, VT8233, VT8233A, VT8235 and VT8237R. This speeds up EEPROM
accesses by a factor 10 or so.

I would like to thank Antonino A. Daplas, Hinko Kocevar, Salah Coronya
and Andreas Henriksson for their help in testing this new feature.

Signed-off-by: Jean Delvare <khali@linux-fr.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

 Documentation/i2c/busses/i2c-viapro |    7 +++++-
 drivers/i2c/busses/i2c-viapro.c     |   39 +++++++++++++++++++++++++++++++++---
 2 files changed, 42 insertions(+), 4 deletions(-)

1 files changed, 6 insertions, 1 deletions

diff --git a/Documentation/i2c/busses/i2c-viapro b/Documentation/i2c/busses/i2c-viapro
index ef0f1e94e726..387cbd4015fc 100644
--- a/Documentation/i2c/busses/i2c-viapro
+++ b/Documentation/i2c/busses/i2c-viapro
@@ -14,7 +14,8 @@ Authors:
         Frodo Looijaard <frodol@dds.nl>,
         Philip Edelbrock <phil@netroedge.com>,
         Kyösti Mälkki <kmalkki@cc.hut.fi>,
-        Mark D. Studebaker <mdsxyz123@yahoo.com>
+        Mark D. Studebaker <mdsxyz123@yahoo.com>,
+        Jean Delvare <khali@linux-fr.org>
 
 Module Parameters
 -----------------
@@ -43,3 +44,7 @@ Your lspci -n listing must show one of these :
 
 If none of these show up, you should look in the BIOS for settings like
 enable ACPI / SMBus or even USB.
+
+Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
+VT8231), this driver supports I2C block transactions. Such transactions
+are mainly useful to read from and write to EEPROMs.