Hi Jean, 2013/10/29 Jean Delvare <khali@xxxxxxxxxxxx>: > Hi Igor, > > On Tue, 29 Oct 2013 19:14:14 +0100, Igor Popik wrote: >> I added new adresses to emc2103 driver with no effect. I checked if >> the module works with trying to load i2c-stub module with 0x2e & >> other addresses - it triggers the device detection in the module.= but >> of course without success as it is a dummy i2c device. >> >> After that I think I'm beginning to understand how it all works so I >> ran i2cdetect >> >> # i2cdetect -l >> i2c-0 i2c i915 gmbus ssc I2C adapter >> i2c-1 i2c i915 gmbus vga I2C adapter >> i2c-2 i2c i915 gmbus panel I2C adapter >> i2c-3 i2c i915 gmbus dpc I2C adapter >> i2c-4 i2c i915 gmbus dpb I2C adapter >> i2c-5 i2c i915 gmbus dpd I2C adapter >> i2c-6 i2c DPDDC-D I2C adapter >> i2c-7 smbus SMBus stub driver SMBus adapter (dummy >> driver I played with) >> >> Should I see emc adapter there or not? I think I should. > > No, the EMC2104 chip is an I2C/SMBus client, not an I2C/SMBus master, so > it's expected you don't see it in the list above. The EMC2104 chip is > connected to one of the adapters. What is surprising is that I'd expect > your motherboard's SMBus to show up in the adapter list but it's not > there. Please check in lspci if you can see it. Then tell us which > kernel you're running. My lspci output (Intel SMBus is visible): 00:00.0 Host bridge: Intel Corporation 3rd Gen Core processor DRAM Controller (rev 09) 00:02.0 VGA compatible controller: Intel Corporation 3rd Gen Core processor Graphics Controller (rev 09) 00:04.0 Signal processing controller: Intel Corporation 3rd Gen Core Processor Thermal Subsystem (rev 09) 00:14.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB xHCI Host Controller (rev 04) 00:16.0 Communication controller: Intel Corporation 7 Series/C210 Series Chipset Family MEI Controller #1 (rev 04) 00:1a.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #2 (rev 04) 00:1b.0 Audio device: Intel Corporation 7 Series/C210 Series Chipset Family High Definition Audio Controller (rev 04) 00:1d.0 USB controller: Intel Corporation 7 Series/C210 Series Chipset Family USB Enhanced Host Controller #1 (rev 04) 00:1f.0 ISA bridge: Intel Corporation QS77 Express Chipset LPC Controller (rev 04) 00:1f.2 SATA controller: Intel Corporation 7 Series Chipset Family 6-port SATA Controller [AHCI mode] (rev 04) 00:1f.3 SMBus: Intel Corporation 7 Series/C210 Series Chipset Family SMBus Controller (rev 04) 00:1f.6 Signal processing controller: Intel Corporation 7 Series/C210 Series Chipset Family Thermal Management Controller (rev 04) uname -a Linux yoga-alien-13 3.11.0-12-generic #19-Ubuntu SMP Wed Oct 9 16:20:46 UTC 2013 x86_64 x86_64 x86_64 GNU/Linux >> From what I understand to instantiate a device from user space proper >> entry in /sys/bus/i2c/devices/i2c-... has to exist. > > Yes, you need the /sys/bus/i2c/devices/i2c-<N> which corresponds to > your SMBus. > >> Is it possible that EMC2104 in my laptop is somehow invisible to >> OS/i2c bus? I'm sure it is there - I can send You a picture ;-) > > Yes, we've seen it before. The SMBus controller can be hidden, or made > inaccessible to the OS due to ACPI resource conflicts, or the EMC2104 > could be behind and I2C switch/gate, or it could be connected using an > arbitrary pair of GPIO pins and we'll never guess what they are... After some googling& investigation in documentation of i2c-i801 driver I found out that it should work for that chipset but in some cases can be conflicted with ACPI (as You wrote above), and in my case it is (messages after loading i2c-i801 driver): ACPI Warning: 0x0000000000002040-0x000000000000205f SystemIO conflicts with Region \_SB_.PCI0.SBUS.SMBI 1 (20130517/utaddress-251) ACPI: If an ACPI driver is available for this device, you should use it instead of the native driver So I guess nothing can be done? Thanks, Igor _______________________________________________ lm-sensors mailing list lm-sensors@xxxxxxxxxxxxxx http://lists.lm-sensors.org/mailman/listinfo/lm-sensors
