[PATCH v3 0/4] iMC SMBUS, TSOD hwmon devices, and eeprom modalias

From: Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>
To: lm-sensors-GZX6beZjE8VD60Wz+7aTrA@public.gmane.org,
	linux-i2c-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	Jean Delvare <khali-PUYAD+kWke1g9hUCZPvPmw@public.gmane.org>,
	Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org>
Cc: James Ralston
	<james.d.ralston-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org>,
	Andy Lutomirski <luto-kltTT9wpgjJwATOyAt5JVQ@public.gmane.org>
Subject: [PATCH v3 0/4] iMC SMBUS, TSOD hwmon devices, and eeprom modalias
Date: Wed, 17 Jul 2013 13:53:04 -0700	[thread overview]
Message-ID: <cover.1374093761.git.luto@amacapital.net> (raw)

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