Re: Creating a driver for MAX31827 temperature switch

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On Mon, Apr 03, 2023 at 12:31:21AM +0300, Daniel Matyas wrote:
> Dear Kernel community,
> 
> I am developing an IIO driver for a temperature switch, which communicates through I2C at Analog Devices Inc.
> 
> When implementing the event handling for the comparator mode of the device, I faced a problem: I don't know how to differentiate the underTemp event from the overTemp event. To understand better, I suggest you check out the device's data sheet for Address map (page 12), Configuration Register Definition (page 13) and OT/UT Status Bits and ALARM Pin Behavior (page 15) - https://www.analog.com/media/en/technical-documentation/data-sheets/MAX31827-MAX31829.pdf
> 
> I had the idea to make 2 channels with the exact same attributes, but with different indexes, so that I can store the overTemp related events on channel 0 and underTemp related events on channel 1. Even so, I don't really feel like this is the right solution. Can anyone give me some advice on this?
> 
> Also, I was suggested that I convert my driver from IIO to HWMON. Do you think that this is needed?
> 

This is a typical hardware monitoring chip, and the driver should be a
hardware monitoring driver.

Guenter


> Yours faithfully,
> Daniel Matyas



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