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SubjectRe: [PATCH v5 0/4] iMC SMBUS and DIMM bus probing
On Fri, Sep 27, 2013 at 6:02 PM, Andy Lutomirski <luto@amacapital.net> wrote:
> 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)
> - Other interesting things, with drivers hopefully to follow...
>
> This patch series adds a simple generic layer for probing for DIMMs over
> SMBUS and an i2c bus driver for the iMC controller found on Intel
> LGA2011 chips.
>
> It now uses only modern infrastructure -- new-style I2C probing and the
> at24 (instead of eeprom) driver.
>
> I've tested this on a Core i7 Extreme and on a Xeon E5 server.
>
> Patches 1-3 are useful even without patch 4. I'm still hoping for feedback
> on patch 4.
>
> Changes from v4:
> - Added the sb_edac changes -- i2c_imc and sb_edac can now coexist
> - Added some paranoid race detection.
> - The driver now confirms its ability to claim software control of the SMBUS
> master. This prevents unpleasant problems on systems that enable CLTT
> (closed loop thermal throttling).
> - Reordered the patches so that the DIMM bus code is last.
>
> Changes from v3:
> - Dropped redundant "tsod" driver
> - Dropped eeprom modalias
> - Switched to probing for the "eeprom" and "jc42"
>
> Andy Lutomirski (4):
> Move Intel SNB device ids from sb_edac to pci_ids.h
> sb_edac: Claim a different PCI device
> i2c_imc: New driver for Intel's iMC, found on LGA2011 chips
> i2c, i2c_imc: Add DIMM bus code
>
> drivers/edac/sb_edac.c | 32 +--
> drivers/i2c/busses/Kconfig | 19 ++
> drivers/i2c/busses/Makefile | 5 +
> drivers/i2c/busses/dimm-bus.c | 97 ++++++++
> drivers/i2c/busses/i2c-imc.c | 562 ++++++++++++++++++++++++++++++++++++++++++
> include/linux/i2c/dimm-bus.h | 24 ++
> include/linux/pci_ids.h | 15 ++
> 7 files changed, 723 insertions(+), 31 deletions(-)
> 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

Any update on these? It would be nice to get them reviewed and applied.

Thanks,
Andy


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