On 7/4/20 12:50 PM, Barnabás Pőcze wrote: > Hello all, > > I am completely new to Linux kernel development. I have written a kernel module for my laptop that integrates the fan speeds available in the embedded controller memory into the hwmon subsystem. > > My first question would be: can such a driver be merged into the mainline? I ask this because it is a device specific driver, and I am not sure if such drivers are wanted in the mainline. > There are several device/platform specific drivers in drivers/hwmon; that is not a problem. Question is more how the EC is accessed, and who is going to maintain the driver after the initial submission. This might be easier to evaluate if we had a patch or a pointer to, for example, an out-of-tree driver at a public repository site such as github. > Depending on the answer to my first question, my second question is: where should such a driver reside in the source tree? Initially, I thought of drivers/hwmon, but that seems to be occupied by drivers for external(?) devices (I am not sure, but that is the idea I get). So I am now thinking of drivers/platform/x86. However, I have failed to find any fan hwmon drivers there, so I am not sure about that one, either. hwmon drivers should in general reside in drivers/hwmon, unless hardware monitoring functionality is part of other functionality and would be difficult to extract from the main driver (example: various Ethernet or graphics controllers). Guenter
