Re: [PATCH v3 2/9] hwmon: (core) New hwmon registration API

From: Guenter Roeck
Date: Fri Aug 12 2016 - 08:40:39 EST


On 08/12/2016 01:16 AM, Keerthy wrote:
On Monday 25 July 2016 09:02 AM, Guenter Roeck wrote:
Up to now, each hwmon driver has to implement its own sysfs attributes.
This requires a lot of template code, and distracts from the driver's core
function to read and write chip registers.

To be able to reduce driver complexity, move sensor attribute handling
and thermal zone registration into hwmon core. By using the new API,
driver code and data size is typically reduced by 20-70%, depending
on driver complexity and the number of sysfs attributes supported.

With this patch, the new API only supports thermal sensors. Support for
other sensor types will be added with subsequent patches.

Hi Guenter,

Seems like this patch introduces a cycling dependency between
thermal_sys and hwmon:

DEPMOD 4.8.0-rc1-next-20160811-00001-g2f84cf7854e7
depmod: ERROR: Found 2 modules in dependency cycles!
depmod: ERROR: Cycle detected: hwmon -> thermal_sys -> hwmon

As reported by R, Vignesh <vigneshr@xxxxxx>.


Hmm ... interesting. Thanks for letting me know. I'll have to think about that.

Guenter