From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from smtp1.linuxfoundation.org (smtp1.linux-foundation.org [172.17.192.35]) by mail.linuxfoundation.org (Postfix) with ESMTPS id AED4EB3F for ; Tue, 25 Aug 2015 06:12:14 +0000 (UTC) Received: from mail-pa0-f53.google.com (mail-pa0-f53.google.com [209.85.220.53]) by smtp1.linuxfoundation.org (Postfix) with ESMTPS id 3AA621BF for ; Tue, 25 Aug 2015 06:12:14 +0000 (UTC) Received: by pacti10 with SMTP id ti10so42250517pac.0 for ; Mon, 24 Aug 2015 23:12:14 -0700 (PDT) Date: Mon, 24 Aug 2015 23:12:10 -0700 From: Eduardo Valentin To: ksummit-discuss@lists.linuxfoundation.org Message-ID: <20150825061208.GA13186@localhost.localdomain> MIME-Version: 1.0 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="G4iJoqBmSsgzjUCe" Content-Disposition: inline Cc: Zhang Rui , Jean Delvare Subject: [Ksummit-discuss] [TECH TOPIC] [CORE TOPIC] The three ways of temperature sensing in Linux List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , --G4iJoqBmSsgzjUCe Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Content-Transfer-Encoding: quoted-printable Hi all, [Not sure if this is TECH or CORE, as it touches more than one subsystem] Not sure how late it is to post this, but I am trying anyway. During LPC 2015 last week it came out the topic of the interaction between the thermal subsystem with HWMON. On top of it, we also got a proposal [1] of having thermal exposing its registered devices as IIO. I know the three subsystem coexist today for some years. They also have their own design goals. However, the fact that we have three different subsystems for doing very similar task may be confusing, for the driver writer, and for user space too. Another aspect of it is the possible code duplication. For example, it would interesting to get board temperature sensors, typically registered as hwmon devices, to be available in the thermal subsystem while constructing thermal zones out of them. Some user process would expect the opposite though, to read the thermal zone sensors as hwmon devices, or as IIO devices. Therefore, it would be interesting to have a better convergence on how these subsystems talk to each other, and how this is exposed to user space.=20 The involved maintainers are: HWMON: M: Jean Delvare M: Guenter Roeck Thermal: M: Zhang Rui M: Eduardo Valentin IIO: M: Jonathan Cameron BR, Eduardo Valentin [1] - http://comments.gmane.org/gmane.linux.kernel.iio/19627 --G4iJoqBmSsgzjUCe Content-Type: application/pgp-signature; name="signature.asc" Content-Description: Digital signature -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.12 (GNU/Linux) iQEcBAEBAgAGBQJV3AcxAAoJEMLUO4d9pOJWf8AH/RbKjGzMn0SLyqZTc8yMcKYr OQc1OLERmSWBy9T/A7em6RDEEYGWgdOJBB6dxBkR7FrJKusaVEewqF7+bjgqECef BiLZe1/7QeaO+ata86cVNW0dp/rSdoMUo/3RqfUiU64OwcV4RZXVHykl8mo290P9 +ceh+eU56dF90XIOoztr/Xxq/QSpdoiiH7eWCRFq7ZDZVnT0Xm39HcxsfPen+vOU fB1w2POcAS2ZIjPw6Mg1DEnY0zwqXQpxUcSCjoA8KJqpGxzFevaUOKMwO85BHfTc fCAeh4NV+rbNtMOtoRrGH/ZavpFpdaaHWew1OEIhOlzqcDTobFFqhH5xeSf1tC4= =yDnb -----END PGP SIGNATURE----- --G4iJoqBmSsgzjUCe--