Re: Lenovo Yoga 13 with SMSC EMC2104 chip

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Hi Guenter, hi Igor,

On Sun, 27 Oct 2013 18:26:20 -0700, Guenter Roeck wrote:
> (...) It should be possible to add support for EMC2104
> to the EMC2103 driver, but someone would have to implement it.
> If you want to hack, you could add the emc2104 device id (0x1d)
> and the emmc2104 I2C address (0x2f) to the driver. That _should_
> give you access to some of the temperature sensors and to one
> of the fan controllers. No guarantee, though.

For that kind of test, you don't even need to change the code. You can
simply instantiate the device from user-space manually using method 4
described in
http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/Documentation/i2c/instantiating-devices

Whether it will work or cause your hardware to crash and burn, I can't
say. I would be very cautious with a fan controller chip.

Igor, could you please provide a register dump (using the i2c-dev
driver + i2cdump from the i2c-tools package) of your EMC2104 chip?

-- 
Jean Delvare

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