From patchwork Thu May 11 03:45:23 2017 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Chris Packham X-Patchwork-Id: 9720887 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id DDFE360387 for ; Thu, 11 May 2017 03:46:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D779C28667 for ; Thu, 11 May 2017 03:46:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CC2C92866A; Thu, 11 May 2017 03:46:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 43BFD28668 for ; Thu, 11 May 2017 03:46:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753869AbdEKDqL (ORCPT ); Wed, 10 May 2017 23:46:11 -0400 Received: from gate2.alliedtelesis.co.nz ([202.36.163.20]:52013 "EHLO gate2.alliedtelesis.co.nz" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752398AbdEKDp6 (ORCPT ); Wed, 10 May 2017 23:45:58 -0400 Received: from mmarshal3.atlnz.lc (mmarshal3.atlnz.lc [10.32.18.43]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client did not present a certificate) by gate2.alliedtelesis.co.nz (Postfix) with ESMTPS id 24C308448C; Thu, 11 May 2017 15:45:55 +1200 (NZST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=alliedtelesis.co.nz; s=mail; t=1494474355; bh=9joKNgXqPyduK+F/MFgWmczRApoJdWG7cm55eLCcYkY=; h=From:To:Cc:Subject:Date:In-Reply-To:References; b=nvThAGDw3wk+PAOAQAUsqyvyfWsDwWiPckz6lLc07EhbagbMunIXcWAU8Ww/fyfyt nH+4E/RHFQAXYZ3/5FYr/7SvdnD57RrGJDaDHs/y/5Lh3A3BFU+7Uk8uqSq0RKf6eE 9JgNWXQb3CC1OAWxtpw0MBuWewoB2hxcgBp+eiTc= Received: from smtp (Not Verified[10.32.16.33]) by mmarshal3.atlnz.lc with Trustwave SEG (v7, 5, 7, 9061) id ; Thu, 11 May 2017 15:45:55 +1200 Received: from chrisp-dl.atlnz.lc (chrisp-dl.ws.atlnz.lc [10.33.22.30]) by smtp (Postfix) with ESMTP id EDE4713F242; Thu, 11 May 2017 15:45:54 +1200 (NZST) Received: by chrisp-dl.atlnz.lc (Postfix, from userid 1030) id D246B1E1E37; Thu, 11 May 2017 15:45:53 +1200 (NZST) From: Chris Packham To: linux-hwmon@vger.kernel.org, linux@roeck-us.net Cc: Tobi Wulff , Chris Packham , Jean Delvare , Jonathan Corbet , linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 3/4] hwmon: (adt7475) temperature smoothing Date: Thu, 11 May 2017 15:45:23 +1200 Message-Id: <20170511034524.22698-4-chris.packham@alliedtelesis.co.nz> X-Mailer: git-send-email 2.11.0.24.ge6920cf In-Reply-To: <20170511034524.22698-1-chris.packham@alliedtelesis.co.nz> References: <20170511034524.22698-1-chris.packham@alliedtelesis.co.nz> Sender: linux-hwmon-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-hwmon@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When enabled temperature smoothing allows ramping the fan speed over a configurable period of time instead of jumping to the new speed instantaneously. Signed-off-by: Chris Packham --- Changes in v2: - use a single tempN_smoothing attribute Changes in v3: - change enh_acou to enh_acoustics - simplify show_temp_st() Documentation/hwmon/adt7475 | 4 ++ drivers/hwmon/adt7475.c | 93 +++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 97 insertions(+) diff --git a/Documentation/hwmon/adt7475 b/Documentation/hwmon/adt7475 index 3990bae60e78..e82b24ec4b07 100644 --- a/Documentation/hwmon/adt7475 +++ b/Documentation/hwmon/adt7475 @@ -114,6 +114,10 @@ minimum (i.e. auto_point1_pwm). This behaviour can be configured using the pwm[1-*]_stall_dis sysfs attribute. A value of 0 means the fans will shut off. A value of 1 means the fans will run at auto_point1_pwm. +The responsiveness of the ADT747x to temperature changes can be configured. +This allows smoothing of the fan speed transition. To set the transition time +set the value in ms in the temp[1-*]_smoothing sysfs attribute. + Notes ----- diff --git a/drivers/hwmon/adt7475.c b/drivers/hwmon/adt7475.c index 4d6c625fec70..f7322330789c 100644 --- a/drivers/hwmon/adt7475.c +++ b/drivers/hwmon/adt7475.c @@ -526,6 +526,90 @@ static ssize_t set_temp(struct device *dev, struct device_attribute *attr, return count; } +/* Assuming CONFIG6[SLOW] is 0 */ +static const int ad7475_st_map[] = { + 37500, 18800, 12500, 7500, 4700, 3100, 1600, 800, +}; + +static ssize_t show_temp_st(struct device *dev, struct device_attribute *attr, + char *buf) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7475_data *data = i2c_get_clientdata(client); + long val; + + switch (sattr->index) { + case 0: + val = data->enh_acoustics[0] & 0xf; + break; + case 1: + val = (data->enh_acoustics[1] >> 4) & 0xf; + break; + case 2: + val = data->enh_acoustics[1] & 0xf; + break; + default: + return -EINVAL; + } + + if (val & 0x8) + return sprintf(buf, "%d\n", ad7475_st_map[val & 0x7]); + else + return sprintf(buf, "0\n"); +} + +static ssize_t set_temp_st(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + struct sensor_device_attribute_2 *sattr = to_sensor_dev_attr_2(attr); + struct i2c_client *client = to_i2c_client(dev); + struct adt7475_data *data = i2c_get_clientdata(client); + unsigned char reg; + int shift, idx; + ulong val; + + if (kstrtoul(buf, 10, &val)) + return -EINVAL; + + switch (sattr->index) { + case 0: + reg = REG_ENHANCE_ACOUSTICS1; + shift = 0; + idx = 0; + break; + case 1: + reg = REG_ENHANCE_ACOUSTICS2; + shift = 4; + idx = 1; + break; + case 2: + reg = REG_ENHANCE_ACOUSTICS2; + shift = 0; + idx = 1; + break; + default: + return -EINVAL; + } + + if (val > 0) { + val = find_closest_descending(val, ad7475_st_map, + ARRAY_SIZE(ad7475_st_map)); + val |= 0x8; + } + + mutex_lock(&data->lock); + + data->enh_acoustics[idx] &= ~(0xf << shift); + data->enh_acoustics[idx] |= (val << shift); + + i2c_smbus_write_byte_data(client, reg, data->enh_acoustics[idx]); + + mutex_unlock(&data->lock); + + return count; +} + /* * Table of autorange values - the user will write the value in millidegrees, * and we'll convert it @@ -1008,6 +1092,8 @@ static SENSOR_DEVICE_ATTR_2(temp1_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, THERM, 0); static SENSOR_DEVICE_ATTR_2(temp1_crit_hyst, S_IRUGO | S_IWUSR, show_temp, set_temp, HYSTERSIS, 0); +static SENSOR_DEVICE_ATTR_2(temp1_smoothing, S_IRUGO | S_IWUSR, show_temp_st, + set_temp_st, 0, 0); static SENSOR_DEVICE_ATTR_2(temp2_input, S_IRUGO, show_temp, NULL, INPUT, 1); static SENSOR_DEVICE_ATTR_2(temp2_alarm, S_IRUGO, show_temp, NULL, ALARM, 1); static SENSOR_DEVICE_ATTR_2(temp2_max, S_IRUGO | S_IWUSR, show_temp, set_temp, @@ -1024,6 +1110,8 @@ static SENSOR_DEVICE_ATTR_2(temp2_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, THERM, 1); static SENSOR_DEVICE_ATTR_2(temp2_crit_hyst, S_IRUGO | S_IWUSR, show_temp, set_temp, HYSTERSIS, 1); +static SENSOR_DEVICE_ATTR_2(temp2_smoothing, S_IRUGO | S_IWUSR, show_temp_st, + set_temp_st, 0, 1); static SENSOR_DEVICE_ATTR_2(temp3_input, S_IRUGO, show_temp, NULL, INPUT, 2); static SENSOR_DEVICE_ATTR_2(temp3_alarm, S_IRUGO, show_temp, NULL, ALARM, 2); static SENSOR_DEVICE_ATTR_2(temp3_fault, S_IRUGO, show_temp, NULL, FAULT, 2); @@ -1041,6 +1129,8 @@ static SENSOR_DEVICE_ATTR_2(temp3_crit, S_IRUGO | S_IWUSR, show_temp, set_temp, THERM, 2); static SENSOR_DEVICE_ATTR_2(temp3_crit_hyst, S_IRUGO | S_IWUSR, show_temp, set_temp, HYSTERSIS, 2); +static SENSOR_DEVICE_ATTR_2(temp3_smoothing, S_IRUGO | S_IWUSR, show_temp_st, + set_temp_st, 0, 2); static SENSOR_DEVICE_ATTR_2(fan1_input, S_IRUGO, show_tach, NULL, INPUT, 0); static SENSOR_DEVICE_ATTR_2(fan1_min, S_IRUGO | S_IWUSR, show_tach, set_tach, MIN, 0); @@ -1125,6 +1215,7 @@ static struct attribute *adt7475_attrs[] = { &sensor_dev_attr_temp1_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_temp1_crit.dev_attr.attr, &sensor_dev_attr_temp1_crit_hyst.dev_attr.attr, + &sensor_dev_attr_temp1_smoothing.dev_attr.attr, &sensor_dev_attr_temp2_input.dev_attr.attr, &sensor_dev_attr_temp2_alarm.dev_attr.attr, &sensor_dev_attr_temp2_max.dev_attr.attr, @@ -1134,6 +1225,7 @@ static struct attribute *adt7475_attrs[] = { &sensor_dev_attr_temp2_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_temp2_crit.dev_attr.attr, &sensor_dev_attr_temp2_crit_hyst.dev_attr.attr, + &sensor_dev_attr_temp2_smoothing.dev_attr.attr, &sensor_dev_attr_temp3_input.dev_attr.attr, &sensor_dev_attr_temp3_fault.dev_attr.attr, &sensor_dev_attr_temp3_alarm.dev_attr.attr, @@ -1144,6 +1236,7 @@ static struct attribute *adt7475_attrs[] = { &sensor_dev_attr_temp3_auto_point2_temp.dev_attr.attr, &sensor_dev_attr_temp3_crit.dev_attr.attr, &sensor_dev_attr_temp3_crit_hyst.dev_attr.attr, + &sensor_dev_attr_temp3_smoothing.dev_attr.attr, &sensor_dev_attr_fan1_input.dev_attr.attr, &sensor_dev_attr_fan1_min.dev_attr.attr, &sensor_dev_attr_fan1_alarm.dev_attr.attr,