f118301416
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(-)
50 lines
1.4 KiB
Text
50 lines
1.4 KiB
Text
Kernel driver i2c-viapro
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Supported adapters:
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* VIA Technologies, Inc. VT82C596A/B
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Datasheet: Sometimes available at the VIA website
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* VIA Technologies, Inc. VT82C686A/B
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Datasheet: Sometimes available at the VIA website
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* VIA Technologies, Inc. VT8231, VT8233, VT8233A, VT8235, VT8237
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Datasheet: available on request from Via
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Authors:
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Frodo Looijaard <frodol@dds.nl>,
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Philip Edelbrock <phil@netroedge.com>,
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Kyösti Mälkki <kmalkki@cc.hut.fi>,
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Mark D. Studebaker <mdsxyz123@yahoo.com>,
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Jean Delvare <khali@linux-fr.org>
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Module Parameters
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-----------------
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* force: int
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Forcibly enable the SMBus controller. DANGEROUS!
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* force_addr: int
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Forcibly enable the SMBus at the given address. EXTREMELY DANGEROUS!
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Description
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-----------
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i2c-viapro is a true SMBus host driver for motherboards with one of the
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supported VIA southbridges.
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Your lspci -n listing must show one of these :
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device 1106:3050 (VT82C596 function 3)
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device 1106:3051 (VT82C596 function 3)
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device 1106:3057 (VT82C686 function 4)
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device 1106:3074 (VT8233)
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device 1106:3147 (VT8233A)
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device 1106:8235 (VT8231)
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devide 1106:3177 (VT8235)
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devide 1106:3227 (VT8237)
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If none of these show up, you should look in the BIOS for settings like
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enable ACPI / SMBus or even USB.
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Except for the oldest chips (VT82C596A/B, VT82C686A and most probably
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VT8231), this driver supports I2C block transactions. Such transactions
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are mainly useful to read from and write to EEPROMs.
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