From patchwork Thu Dec 18 10:13:04 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Majewski X-Patchwork-Id: 5512531 Return-Path: X-Original-To: patchwork-linux-samsung-soc@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 0B54EBEEA8 for ; Thu, 18 Dec 2014 10:16:47 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DB04420A26 for ; Thu, 18 Dec 2014 10:16:44 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 0A15E209EA for ; Thu, 18 Dec 2014 10:16:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751808AbaLRKNz (ORCPT ); Thu, 18 Dec 2014 05:13:55 -0500 Received: from mailout4.samsung.com ([203.254.224.34]:36396 "EHLO mailout4.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751698AbaLRKNx (ORCPT ); Thu, 18 Dec 2014 05:13:53 -0500 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout4.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NGR00MCIWF26480@mailout4.samsung.com>; Thu, 18 Dec 2014 19:13:51 +0900 (KST) X-AuditID: cbfee61a-f79c06d000004e71-52-5492a8ded71c Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id 0B.43.20081.ED8A2945; Thu, 18 Dec 2014 19:13:50 +0900 (KST) Received: from mcdsrvbld02.digital.local ([106.116.37.23]) by mmp2.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0NGR00884WE20080@mmp2.samsung.com>; Thu, 18 Dec 2014 19:13:50 +0900 (KST) From: Lukasz Majewski To: Eduardo Valentin , Kamil Debski , Jean Delvare , Guenter Roeck Cc: lm-sensors@lm-sensors.org, Linux PM list , "linux-samsung-soc@vger.kernel.org" , devicetree@vger.kernel.org, Lukasz Majewski , Kukjin Kim , linux-kernel@vger.kernel.org, Sylwester Nawrocki , Lukasz Majewski Subject: [PATCH 2/9] hwmon: dts: Doc: Add DTS doc to explain how to use PWM FAN as a cooling device Date: Thu, 18 Dec 2014 11:13:04 +0100 Message-id: <1418897591-18332-3-git-send-email-l.majewski@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-reply-to: <1418897591-18332-1-git-send-email-l.majewski@samsung.com> References: <1418897591-18332-1-git-send-email-l.majewski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFtrJLMWRmVeSWpSXmKPExsVy+t9jQd17KyaFGMxbZWox/8g5Vov5V66x Wiy9+4nN4sfrC2wWvQuuslm8ecRt8ebhZkaLy7vmsFl87j3CaDHj/D4miycLzzBZ3Jm2l83i 8Jt2Vgdej52z7rJ7PJi4m81j3bS3zB47vzewe/RtWcXosfl0tcfnTXIB7FFcNimpOZllqUX6 dglcGZPbVzIVPOOtWLd+NVMD4wuuLkYODgkBE4lpty27GDmBTDGJC/fWs3UxcnEICUxnlNj8 ZSYjSEJIoItJ4uYhNxCbTUBP4vPdp0wgRSICMxgl9jd9YwdxmAW+M0k0bV3KAlIlLJAq8e3b eWaQDSwCqhJzfpuBhHkF3CR+3r/EDrFNUaL72QQ2EJtTwF1iznMIWwiopunvJeYJjLwLGBlW MYqmFiQXFCel5xrqFSfmFpfmpesl5+duYgQH6DOpHYwrGywOMQpwMCrx8EroTQoRYk0sK67M PcQowcGsJMIbnQMU4k1JrKxKLcqPLyrNSS0+xCjNwaIkzqtk3xYiJJCeWJKanZpakFoEk2Xi 4JRqYPQ5nmMqk3Rq6kS/+C1nbkoHVc2vm5hRuDhP2vLn21dPNC5m+e4XbX0sd7HddsPu8JVP Vzi/jHxb3pqk+7/vYS7PgocrViy7mX7/hNu8eUpGp45v+nlyA5vnjsMPv697Plv0ldqyC+o2 wRYpkhk+cQaRZ/k9NtaZeTya/TRf4ELxWY5tpz91MzkpsRRnJBpqMRcVJwIAcN+70EwCAAA= Sender: linux-samsung-soc-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Several new properties to allow PWM fan working as a cooling device have been combined into this single commit. Signed-off-by: Lukasz Majewski --- .../devicetree/bindings/hwmon/pwm-fan.txt | 28 ++++++++++++++++++++++ 1 file changed, 28 insertions(+) diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt index 610757c..3877810 100644 --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt @@ -3,10 +3,38 @@ Bindings for a fan connected to the PWM lines Required properties: - compatible : "pwm-fan" - pwms : the PWM that is used to control the PWM fan +- cooling-pwm-values : PWM duty cycle values relative to + cooling-max-pwm-value correspondig to + proper cooling states +- default-pulse-width : Property specifying default pulse width for FAN + at system boot (zero to disable FAN on boot). + Allowed range is 0 to 255 + +Thorough description of the following bindings: + cooling-min-state = <0>; + cooling-max-state = <3>; + #cooling-cells = <2>; + thermal-zone { + cpu_thermal: cpu-thermal { + cooling-maps { + map0 { + trip = <&cpu_alert1>; + cooling-device = <&fan0 0 1>; + }; + }; + }; + +for PWM FAN used as cooling device can be found at: +./Documentation/devicetree/bindings/thermal/thermal.txt Example: pwm-fan { compatible = "pwm-fan"; status = "okay"; pwms = <&pwm 0 10000 0>; + cooling-min-state = <0>; + cooling-max-state = <3>; + #cooling-cells = <2>; + cooling-pwm-values = <0 102 170 255>; + default-pulse-width = <0>; };