From patchwork Mon Dec 22 16:27:43 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Majewski X-Patchwork-Id: 5528141 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 B2B90BEEA8 for ; Mon, 22 Dec 2014 16:30:41 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id E791320108 for ; Mon, 22 Dec 2014 16:30:40 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id A8FF7201B4 for ; Mon, 22 Dec 2014 16:30:37 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932076AbaLVQ2m (ORCPT ); Mon, 22 Dec 2014 11:28:42 -0500 Received: from mailout2.samsung.com ([203.254.224.25]:53627 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932087AbaLVQ2j (ORCPT ); Mon, 22 Dec 2014 11:28:39 -0500 Received: from epcpsbgm2.samsung.com (epcpsbgm2 [203.254.230.27]) by mailout2.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NGZ00500SFPWD60@mailout2.samsung.com>; Tue, 23 Dec 2014 01:28:37 +0900 (KST) X-AuditID: cbfee61b-f79d76d0000024d6-78-549846b5cafb Received: from epmmp1.local.host ( [203.254.227.16]) by epcpsbgm2.samsung.com (EPCPMTA) with SMTP id 25.ED.09430.5B648945; Tue, 23 Dec 2014 01:28:37 +0900 (KST) Received: from mcdsrvbld02.digital.local ([106.116.37.23]) by mmp1.samsung.com (Oracle Communications Messaging Server 7u4-24.01 (7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTPA id <0NGZ00H17SEF7V60@mmp1.samsung.com>; Tue, 23 Dec 2014 01:28:37 +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 , Abhilash Kesavan , Abhilash Kesavan , Lukasz Majewski Subject: [PATCH v2 3/8] hwmon: dts: Doc: Add DTS doc to explain how to use PWM FAN as a cooling device Date: Mon, 22 Dec 2014 17:27:43 +0100 Message-id: <1419265668-32283-4-git-send-email-l.majewski@samsung.com> X-Mailer: git-send-email 1.7.10.4 In-reply-to: <1419265668-32283-1-git-send-email-l.majewski@samsung.com> References: <1418897591-18332-1-git-send-email-l.majewski@samsung.com> <1419265668-32283-1-git-send-email-l.majewski@samsung.com> X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFjrMLMWRmVeSWpSXmKPExsVy+t9jAd2tbjNCDD62GVg8XrOYyWL+kXOs FvOvXGO1WHr3E5vFj9cX2CzW/FWy6F1wlc3izSNuizcPNzNaXN41h83ic+8RRosZ5/cxWTxZ eIbJ4s60vWwWh9+0szrwe+ycdZfd48HE3Wwe66a9ZfbY+b2B3aNvyypGj82nqz0+b5ILYI/i sklJzcksSy3St0vgyvj/pI29YApvxZtr29kbGHdxdTFyckgImEhcWdLEAmGLSVy4t56ti5GL Q0hgEaPEl6fH2EASQgJdTBL/94SC2GwCehKf7z5lAikSEZjBKLG/6Rs7iMMscIVZ4tupRrBR wgIZEpd6H7J2MXJwsAioSjw75A8S5hVwk2jfcoYJYpuiRPezCWwgJZwC7hK/X/FCLG5mlDi1 oJF5AiPvAkaGVYyiqQXJBcVJ6blGesWJucWleel6yfm5mxjBQftMegfjqgaLQ4wCHIxKPLyc adNDhFgTy4orcw8xSnAwK4nwXrWcESLEm5JYWZValB9fVJqTWnyIUZqDRUmcV8m+LURIID2x JDU7NbUgtQgmy8TBKdXAOPnQ349OHfO6lj2e6Vy34nWQnMLmDauO5dnfkwtu2NsVplvkuTvm +IXJ2ysWtH/67vXnkOUvgeCdHjGqzpsnvG25fX5pxNzqI4v4/O71Ot/be93vu3ZJoXerhFdt SfCxeKPNScKJ/XZ3Ihvm3Fn/sZD9K89ruY+vbVVNcvWV7YtzLZ9etXRtVGIpzkg01GIuKk4E AFt32n9WAgAA 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 --- Changes for v2: - Rename cooling-pwm-values to cooling-levels - Remove default-pulse-width property and stick to default hwmon policy --- .../devicetree/bindings/hwmon/pwm-fan.txt | 23 ++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt index 610757c..001446a 100644 --- a/Documentation/devicetree/bindings/hwmon/pwm-fan.txt +++ b/Documentation/devicetree/bindings/hwmon/pwm-fan.txt @@ -3,10 +3,33 @@ 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-levels : PWM duty cycle values in a range from 0 to 255 + which correspond to thermal cooling states + +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-levels = <0 102 170 255>; };