From patchwork Thu Dec 18 10:13:08 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Lukasz Majewski X-Patchwork-Id: 5512461 X-Patchwork-Delegate: eduardo.valentin@ti.com Return-Path: X-Original-To: patchwork-linux-pm@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 DEB7CBEEA8 for ; Thu, 18 Dec 2014 10:16:08 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 7A9AF20A24 for ; Thu, 18 Dec 2014 10:16:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 339F920A26 for ; Thu, 18 Dec 2014 10:16:06 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752025AbaLRKOq (ORCPT ); Thu, 18 Dec 2014 05:14:46 -0500 Received: from mailout2.samsung.com ([203.254.224.25]:21634 "EHLO mailout2.samsung.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751983AbaLRKOo (ORCPT ); Thu, 18 Dec 2014 05:14:44 -0500 Received: from epcpsbgm1.samsung.com (epcpsbgm1 [203.254.230.26]) by mailout2.samsung.com (Oracle Communications Messaging Server 7u4-24.01(7.0.4.24.0) 64bit (built Nov 17 2011)) with ESMTP id <0NGR006UDWGILP50@mailout2.samsung.com>; Thu, 18 Dec 2014 19:14:42 +0900 (KST) X-AuditID: cbfee61a-f79c06d000004e71-e8-5492a912f82f Received: from epmmp2 ( [203.254.227.17]) by epcpsbgm1.samsung.com (EPCPMTA) with SMTP id C9.63.20081.219A2945; Thu, 18 Dec 2014 19:14:42 +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 19:14:42 +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 6/9] hwmon: thermal: Read PWM FAN configuration from device tree Date: Thu, 18 Dec 2014 11:13:08 +0100 Message-id: <1418897591-18332-7-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+NgFtrDLMWRmVeSWpSXmKPExsVy+t9jQV2hlZNCDFr6DS3mHznHajH/yjVW i6V3P7FZ/Hh9gc2id8FVNos3j7gt3jzczGhxedccNovPvUcYLWac38dk8WThGSaLO9P2slkc ftPO6sDrsXPWXXaPBxN3s3msm/aW2WPn9wZ2j74tqxg9Np+u9vi8SS6APYrLJiU1J7MstUjf LoErY9GDdWwFp4Qq+vfOYWtgbOHvYuTkkBAwkeie9Z8dwhaTuHBvPVsXIxeHkMB0Ron2718Y IZwuJokFty+xglSxCehJfL77lAkkISIwg1Fif9M3dhCHWeA7k0TT1qUsIFXCAgES7xafYwSx WQRUJb6c7WAGsXkF3CTuL7zHArFPUaL72QQ2EJtTwF1iznMIWwiopunvJeYJjLwLGBlWMYqm FiQXFCel5xrqFSfmFpfmpesl5+duYgSH6TOpHYwrGywOMQpwMCrx8EroTQoRYk0sK67MPcQo wcGsJMIbnQMU4k1JrKxKLcqPLyrNSS0+xCjNwaIkzqtk3xYiJJCeWJKanZpakFoEk2Xi4JRq YMzr00v8JzbdS8/y3SeZDxp/nUQNftp9Mg9NeqClYv5dJt1s4bTAqiWnuK726dSpPLjNH+9w X2WW1DyX3d9dWx+9fq8zQ6ODLfPOTfYpbhGG/GfS11t72c5e7uOQNOEcD09Z0j1/2T/zS37u 2xDyfOP9/zOsr4mpC2XMefD035z8WbNn9nf+CVJiKc5INNRiLipOBACC//25TwIAAA== Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@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 Code for reading PWM FAN configuration data via device tree has been added. Signed-off-by: Lukasz Majewski --- drivers/hwmon/pwm-fan.c | 51 ++++++++++++++++++++++++++++++++++++++++++++++++- 1 file changed, 50 insertions(+), 1 deletion(-) diff --git a/drivers/hwmon/pwm-fan.c b/drivers/hwmon/pwm-fan.c index 870e100..5854bb3 100644 --- a/drivers/hwmon/pwm-fan.c +++ b/drivers/hwmon/pwm-fan.c @@ -30,7 +30,10 @@ struct pwm_fan_ctx { struct mutex lock; struct pwm_device *pwm; - unsigned char pwm_value; + unsigned int pwm_value; + unsigned int pwm_fan_state; + unsigned int pwm_fan_max_state; + unsigned int *pwm_fan_cooling_states; }; static int __set_pwm(struct pwm_fan_ctx *ctx, unsigned long pwm) @@ -100,6 +103,49 @@ static struct attribute *pwm_fan_attrs[] = { ATTRIBUTE_GROUPS(pwm_fan); +int pwm_fan_of_get_cooling_data(struct device *dev, struct pwm_fan_ctx *ctx) +{ + struct device_node *np = dev->of_node; + struct property *pp; + int len, num, i; + + pp = of_find_property(np, "cooling-pwm-values", &len); + if (!pp) { + dev_err(dev, "Property: 'cooling-pwm-values' not found\n"); + return -EINVAL; + } + + if (len == 0) { + dev_err(dev, "Length wrong value!\n"); + return -EINVAL; + } + + ctx->pwm_fan_cooling_states = devm_kzalloc(dev, len, GFP_KERNEL); + if (!ctx->pwm_fan_cooling_states) { + dev_err(dev, "Allocation failed for pwm dan cooling states\n"); + return -ENOMEM; + } + + num = len / sizeof(u32); + if (of_property_read_u32_array(np, pp->name, + ctx->pwm_fan_cooling_states, num)) { + dev_err(dev, "Property: %s cannot be read!\n", pp->name); + return -EINVAL; + } + + for (i = 0; i < num; i++) { + if (ctx->pwm_fan_cooling_states[i] > MAX_PWM) { + dev_err(dev, "PWM fan state[%d]:%d > %d\n", i, + ctx->pwm_fan_cooling_states[i], MAX_PWM); + return -EINVAL; + } + } + + ctx->pwm_fan_max_state = num - 1; + + return 0; +} + static int pwm_fan_probe(struct platform_device *pdev) { struct device *hwmon; @@ -120,6 +166,9 @@ static int pwm_fan_probe(struct platform_device *pdev) } platform_set_drvdata(pdev, ctx); + ret = pwm_fan_of_get_cooling_data(&pdev->dev, ctx); + if (ret) + return ret; /* Set duty cycle to maximum allowed */ duty_cycle = ctx->pwm->period - 1;