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| author | Andrew Armenia <andrew@asquaredlabs.com> | 2012-07-24 14:13:57 +0200 |
|---|---|---|
| committer | Jean Delvare <khali@endymion.delvare> | 2012-07-24 14:13:57 +0200 |
| commit | 2a2f7404a1946be62290292ca5d6438c4b50567f (patch) | |
| tree | 79c458c163f378de8704bb7ea7529d3957f39c56 /Documentation | |
| parent | e154bf6fbfc167426ee938111a5ffa36bd8541a1 (diff) | |
| download | linux-2a2f7404a1946be62290292ca5d6438c4b50567f.tar.gz | |
i2c-piix4: Support AMD auxiliary SMBus controller
Some AMD chipsets, such as the SP5100, have an auxiliary SMBus controller with a second set of registers. This patch adds support for this auxiliary controller. Tested on ASUS KCMA-D8 motherboard. Signed-off-by: Andrew Armenia <andrew@asquaredlabs.com> Signed-off-by: Jean Delvare <khali@linux-fr.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/i2c/busses/i2c-piix4 | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/i2c/busses/i2c-piix4 b/Documentation/i2c/busses/i2c-piix4 index 475bb4ae0720..1e6634f54c50 100644 --- a/Documentation/i2c/busses/i2c-piix4 +++ b/Documentation/i2c/busses/i2c-piix4 @@ -8,6 +8,11 @@ Supported adapters: Datasheet: Only available via NDA from ServerWorks * ATI IXP200, IXP300, IXP400, SB600, SB700 and SB800 southbridges Datasheet: Not publicly available + SB700 register reference available at: + http://support.amd.com/us/Embedded_TechDocs/43009_sb7xx_rrg_pub_1.00.pdf + * AMD SP5100 (SB700 derivative found on some server mainboards) + Datasheet: Publicly available at the AMD website + http://support.amd.com/us/Embedded_TechDocs/44413.pdf * AMD Hudson-2 Datasheet: Not publicly available * Standard Microsystems (SMSC) SLC90E66 (Victory66) southbridge @@ -68,6 +73,10 @@ this driver on those mainboards. The ServerWorks Southbridges, the Intel 440MX, and the Victory66 are identical to the PIIX4 in I2C/SMBus support. +The AMD SB700 and SP5100 chipsets implement two PIIX4-compatible SMBus +controllers. If your BIOS initializes the secondary controller, it will +be detected by this driver as an "Auxiliary SMBus Host Controller". + If you own Force CPCI735 motherboard or other OSB4 based systems you may need to change the SMBus Interrupt Select register so the SMBus controller uses the SMI mode. |