Intel LGA2011 machines have dedicated SMBUS controllers for DIMM sockets. Because they're dedicated, they can be safely and accurately probed, since all devices on them are known to be attached to DIMMs. The devices found are: - SPD EEPROMs - TSODs (Temperature Sensor on DIMMs), a JEDEC standard device - Other interesting things, with drivers hopefully to follow... This patch series adds a simple generic layer for probing for DIMMs over SMBUS, an i2c bus driver for the iMC controller found on Intel LGA2011 chips, and a modalias for the eeprom driver so it can be automatically loaded. I've tested this on a Core i7 Extreme and on a Xeon E5 server. With this series applied, sensors shows (on the Xeon E5): TSOD-i2c-1-18 Adapter: iMC socket 0 channel 0 DIMM Temperature: +35.2°C TSOD-i2c-1-1c Adapter: iMC socket 0 channel 0 DIMM Temperature: +33.0°C TSOD-i2c-3-18 Adapter: iMC socket 1 channel 0 DIMM Temperature: +34.0°C TSOD-i2c-3-1c Adapter: iMC socket 1 channel 0 DIMM Temperature: +27.2°C with no need for any userspace probing or manual module loading. decode-dimms works on both machines, again without any manual module loading. The whole series is available on git here (against v3.9.7): https://git.kernel.org/cgit/linux/kernel/git/luto/linux.git/log/?h=i2c_imc/patch_v3 Changes from earlier versions: - Dropped changes to core I2C_CLASS_SPD probing - Cleanup up i2c_imc driver - Added dimm-bus, tsod driver, and eeprom modalias Andy Lutomirski (4): i2c: Add DIMM bus code i2c_imc: New driver for Intel's iMC, found on LGA2011 chips tsod: New hwmon driver for Temperature Sensors on DIMM eeprom: Add a MODULE_DEVICE_TABLE drivers/hwmon/Kconfig | 10 + drivers/hwmon/Makefile | 1 + drivers/hwmon/tsod.c | 195 +++++++++++++++ drivers/i2c/busses/Kconfig | 19 ++ drivers/i2c/busses/Makefile | 5 + drivers/i2c/busses/dimm-bus.c | 84 +++++++ drivers/i2c/busses/i2c-imc.c | 548 ++++++++++++++++++++++++++++++++++++++++++ drivers/misc/eeprom/eeprom.c | 1 + include/linux/i2c/dimm-bus.h | 24 ++ 9 files changed, 887 insertions(+) create mode 100644 drivers/hwmon/tsod.c create mode 100644 drivers/i2c/busses/dimm-bus.c create mode 100644 drivers/i2c/busses/i2c-imc.c create mode 100644 include/linux/i2c/dimm-bus.h -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-i2c" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
