From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 817C2C4321E for ; Mon, 3 Oct 2022 11:56:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229698AbiJCL4d (ORCPT ); Mon, 3 Oct 2022 07:56:33 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:53396 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229482AbiJCL43 (ORCPT ); Mon, 3 Oct 2022 07:56:29 -0400 Received: from mail-qk1-f175.google.com (mail-qk1-f175.google.com [209.85.222.175]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5C30D4F1A5; Mon, 3 Oct 2022 04:56:28 -0700 (PDT) Received: by mail-qk1-f175.google.com with SMTP id k12so6355263qkj.8; Mon, 03 Oct 2022 04:56:28 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=cc:to:subject:message-id:date:from:in-reply-to:references :mime-version:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=WitNOf6WBeNmu77lsn7kACwTyf0tIcs7nBCxwgdcQsc=; b=JblJdVZJHNu6dAYBd986ggG1XshqKu8jN1X+Qn2hlyLhPN2gS8TNzbZtbaNFNjDzcv EtLliRJuX+F7coOo30/Gz1iuALGngevAgNUuNAdIrSBVGTEGui87K3UYIuA5e2whJoIo YZoRVWjGSJOtVqpV5mRuv9PNPkJLGaTLhvbrib9u1xEtS1bqGI1aDIQiANXk0yHOOQds kdnD2elzyBnFlY4ioj2Li2n4un8Q3j/T0NjgDOoQlllUClVdsZ1AYsjafjrOr9iNftog 1/1tdRWufXIiCzkPJjobiHrgAMieARYDijI6vz4NpU6xzCaN05JgRUMhN4/mBc6JyoWd 7d8w== X-Gm-Message-State: ACrzQf3kTj098frc7SX25UM5LpS63QIKdIflauM+RFYJY8QtL66c+tNx u0suCzAEHebQ8P8SeMhVxBcIf7YV0RuYjoZNdhY= X-Google-Smtp-Source: AMsMyM6gK4Lpk9U29mVa1xe8BWRFfH9VFbqDWp91XeWepB1sC9vs6HtLeg7T4HHwhuWsguU1iWWGBGWooT36YUjNN0U= X-Received: by 2002:a37:a907:0:b0:6cb:be29:ac72 with SMTP id s7-20020a37a907000000b006cbbe29ac72mr13323935qke.505.1664798187356; Mon, 03 Oct 2022 04:56:27 -0700 (PDT) MIME-Version: 1.0 References: <20221003092602.1323944-1-daniel.lezcano@linaro.org> <20221003092602.1323944-4-daniel.lezcano@linaro.org> In-Reply-To: <20221003092602.1323944-4-daniel.lezcano@linaro.org> From: "Rafael J. Wysocki" Date: Mon, 3 Oct 2022 13:56:16 +0200 Message-ID: Subject: Re: [PATCH v8 03/29] thermal/core: Add a generic thermal_zone_set_trip() function To: Daniel Lezcano Cc: rafael@kernel.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, rui.zhang@intel.com, Raju Rangoju , "David S. Miller" , Eric Dumazet , Jakub Kicinski , Paolo Abeni , Peter Kaestle , Hans de Goede , Mark Gross , Miquel Raynal , Amit Kucheria , Nicolas Saenz Julienne , Broadcom Kernel Team , Florian Fainelli , Ray Jui , Scott Branden , Support Opensource , Lukasz Luba , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , NXP Linux Team , Thara Gopinath , Andy Gross , Bjorn Andersson , =?UTF-8?Q?Niklas_S=C3=B6derlund?= , Bartlomiej Zolnierkiewicz , Krzysztof Kozlowski , Alim Akhtar , Thierry Reding , Jonathan Hunter , Eduardo Valentin , Keerthy , Kunihiko Hayashi , Masami Hiramatsu , Antoine Tenart , Srinivas Pandruvada , Dmitry Osipenko , netdev@vger.kernel.org, platform-driver-x86@vger.kernel.org, linux-rpi-kernel@lists.infradead.org, linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, linux-renesas-soc@vger.kernel.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, linux-omap@vger.kernel.org Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-tegra@vger.kernel.org On Mon, Oct 3, 2022 at 11:26 AM Daniel Lezcano wrote: > > The thermal zone ops defines a set_trip callback where we can invoke > the backend driver to set an interrupt for the next trip point > temperature being crossed the way up or down, or setting the low level > with the hysteresis. > > The ops is only called from the thermal sysfs code where the userspace > has the ability to modify a trip point characteristic. > > With the effort of encapsulating the thermal framework core code, > let's create a thermal_zone_set_trip() which is the writable side of > the thermal_zone_get_trip() and put there all the ops encapsulation. > > Signed-off-by: Daniel Lezcano Acked-by: Rafael J. Wysocki > --- > V8: > - pretty one line condition and parenthesis removal (Rafael J. Wysocki) > --- > drivers/thermal/thermal_core.c | 46 +++++++++++++++++++++++++++++ > drivers/thermal/thermal_sysfs.c | 52 +++++++++++---------------------- > include/linux/thermal.h | 3 ++ > 3 files changed, 66 insertions(+), 35 deletions(-) > > diff --git a/drivers/thermal/thermal_core.c b/drivers/thermal/thermal_core.c > index 16ef91dc102f..3a9915824e67 100644 > --- a/drivers/thermal/thermal_core.c > +++ b/drivers/thermal/thermal_core.c > @@ -1211,6 +1211,52 @@ int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, > } > EXPORT_SYMBOL_GPL(thermal_zone_get_trip); > > +int thermal_zone_set_trip(struct thermal_zone_device *tz, int trip_id, > + const struct thermal_trip *trip) > +{ > + struct thermal_trip t; > + int ret = -EINVAL; > + > + mutex_lock(&tz->lock); > + > + if (!tz->ops->set_trip_temp && !tz->ops->set_trip_hyst && !tz->trips) > + goto out; > + > + ret = __thermal_zone_get_trip(tz, trip_id, &t); > + if (ret) > + goto out; > + > + if (t.type != trip->type) { > + ret = -EINVAL; > + goto out; > + } > + > + if (t.temperature != trip->temperature && tz->ops->set_trip_temp) { > + ret = tz->ops->set_trip_temp(tz, trip_id, trip->temperature); > + if (ret) > + goto out; > + } > + > + if (t.hysteresis != trip->hysteresis && tz->ops->set_trip_hyst) { > + ret = tz->ops->set_trip_hyst(tz, trip_id, trip->hysteresis); > + if (ret) > + goto out; > + } > + > + if (tz->trips && (t.temperature != trip->temperature || t.hysteresis != trip->hysteresis)) > + tz->trips[trip_id] = *trip; > +out: > + mutex_unlock(&tz->lock); > + > + if (!ret) { > + thermal_notify_tz_trip_change(tz->id, trip_id, trip->type, > + trip->temperature, trip->hysteresis); > + thermal_zone_device_update(tz, THERMAL_TRIP_CHANGED); > + } > + > + return ret; > +} > + > /** > * thermal_zone_device_register_with_trips() - register a new thermal zone device > * @type: the thermal zone device type > diff --git a/drivers/thermal/thermal_sysfs.c b/drivers/thermal/thermal_sysfs.c > index 6c45194aaabb..8d7b25ab67c2 100644 > --- a/drivers/thermal/thermal_sysfs.c > +++ b/drivers/thermal/thermal_sysfs.c > @@ -115,32 +115,19 @@ trip_point_temp_store(struct device *dev, struct device_attribute *attr, > struct thermal_trip trip; > int trip_id, ret; > > - if (!tz->ops->set_trip_temp && !tz->trips) > - return -EPERM; > - > if (sscanf(attr->attr.name, "trip_point_%d_temp", &trip_id) != 1) > return -EINVAL; > > - if (kstrtoint(buf, 10, &trip.temperature)) > - return -EINVAL; > - > - if (tz->ops->set_trip_temp) { > - ret = tz->ops->set_trip_temp(tz, trip_id, trip.temperature); > - if (ret) > - return ret; > - } > - > - if (tz->trips) > - tz->trips[trip_id].temperature = trip.temperature; > - > ret = thermal_zone_get_trip(tz, trip_id, &trip); > if (ret) > return ret; > > - thermal_notify_tz_trip_change(tz->id, trip_id, trip.type, > - trip.temperature, trip.hysteresis); > + if (kstrtoint(buf, 10, &trip.temperature)) > + return -EINVAL; > > - thermal_zone_device_update(tz, THERMAL_EVENT_UNSPECIFIED); > + ret = thermal_zone_set_trip(tz, trip_id, &trip); > + if (ret) > + return ret; > > return count; > } > @@ -168,29 +155,24 @@ trip_point_hyst_store(struct device *dev, struct device_attribute *attr, > const char *buf, size_t count) > { > struct thermal_zone_device *tz = to_thermal_zone(dev); > - int trip, ret; > - int temperature; > - > - if (!tz->ops->set_trip_hyst) > - return -EPERM; > + struct thermal_trip trip; > + int trip_id, ret; > > - if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip) != 1) > + if (sscanf(attr->attr.name, "trip_point_%d_hyst", &trip_id) != 1) > return -EINVAL; > > - if (kstrtoint(buf, 10, &temperature)) > - return -EINVAL; > + ret = thermal_zone_get_trip(tz, trip_id, &trip); > + if (ret) > + return ret; > > - /* > - * We are not doing any check on the 'temperature' value > - * here. The driver implementing 'set_trip_hyst' has to > - * take care of this. > - */ > - ret = tz->ops->set_trip_hyst(tz, trip, temperature); > + if (kstrtoint(buf, 10, &trip.hysteresis)) > + return -EINVAL; > > - if (!ret) > - thermal_zone_set_trips(tz); > + ret = thermal_zone_set_trip(tz, trip_id, &trip); > + if (ret) > + return ret; > > - return ret ? ret : count; > + return count; > } > > static ssize_t > diff --git a/include/linux/thermal.h b/include/linux/thermal.h > index feb8b61df746..66373f872237 100644 > --- a/include/linux/thermal.h > +++ b/include/linux/thermal.h > @@ -338,6 +338,9 @@ static inline void devm_thermal_of_zone_unregister(struct device *dev, > int thermal_zone_get_trip(struct thermal_zone_device *tz, int trip_id, > struct thermal_trip *trip); > > +int thermal_zone_set_trip(struct thermal_zone_device *tz, int trip_id, > + const struct thermal_trip *trip); > + > int thermal_zone_get_num_trips(struct thermal_zone_device *tz); > > int thermal_zone_get_crit_temp(struct thermal_zone_device *tz, int *temp); > -- > 2.34.1 >