From patchwork Thu Aug 9 12:45:58 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: durgadoss.r@intel.com X-Patchwork-Id: 1300401 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 76446DFF7B for ; Thu, 9 Aug 2012 12:46:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932530Ab2HIMqa (ORCPT ); Thu, 9 Aug 2012 08:46:30 -0400 Received: from mga02.intel.com ([134.134.136.20]:14321 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932467Ab2HIMq3 (ORCPT ); Thu, 9 Aug 2012 08:46:29 -0400 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 09 Aug 2012 05:46:28 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.77,739,1336374000"; d="scan'208";a="177969455" Received: from dr3-desktop.iind.intel.com ([10.223.107.36]) by orsmga001.jf.intel.com with ESMTP; 09 Aug 2012 05:46:26 -0700 From: Durgadoss R To: lenb@kernel.org, rui.zhang@intel.com, rjw@sisk.pl, linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org Cc: eduardo.valentin@ti.com, amit.kachhap@linaro.org, wni@nvidia.com, Durgadoss R Subject: [PATCH 06/13] Thermal: Add a policy sysfs attribute Date: Thu, 9 Aug 2012 18:15:58 +0530 Message-Id: <1344516365-7230-7-git-send-email-durgadoss.r@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1344516365-7230-1-git-send-email-durgadoss.r@intel.com> References: <1344516365-7230-1-git-send-email-durgadoss.r@intel.com> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org This patch adds a policy sysfs attribute to a thermal zone. This attribute will give us the throttling policy used for the zone. This is a RO attribute. Signed-off-by: Durgadoss R --- drivers/thermal/thermal_sys.c | 40 ++++++++++++++++++++++++++++++++++++++++ include/linux/thermal.h | 1 + 2 files changed, 41 insertions(+) diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 243a3f0..195e529 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -411,6 +411,27 @@ passive_show(struct device *dev, struct device_attribute *attr, return sprintf(buf, "%d\n", tz->forced_passive); } +static ssize_t show_throttle_policy(struct device *dev, + struct device_attribute *devattr, char *buf) +{ + struct thermal_zone_device *tz = to_thermal_zone(dev); + struct thermal_zone_params *tzp = tz->tzp; + + if (!tzp) + return sprintf(buf, "step_wise(default)\n"); + + switch (tzp->throttle_policy) { + case THERMAL_FAIR_SHARE: + return sprintf(buf, "fair_share\n"); + case THERMAL_STEP_WISE: + return sprintf(buf, "step_wise\n"); + case THERMAL_USER_SPACE: + return sprintf(buf, "user_space\n"); + default: + return sprintf(buf, "unknown\n"); + } +} + static DEVICE_ATTR(type, 0444, type_show, NULL); static DEVICE_ATTR(temp, 0444, temp_show, NULL); static DEVICE_ATTR(mode, 0644, mode_show, mode_store); @@ -1269,6 +1290,15 @@ leave: } EXPORT_SYMBOL(thermal_zone_device_update); +static int create_policy_attr(struct thermal_zone_device *tz) +{ + sysfs_attr_init(&tz->policy_attr.attr); + tz->policy_attr.attr.name = "throttle_policy"; + tz->policy_attr.attr.mode = S_IRUGO | S_IWUSR; + tz->policy_attr.show = show_throttle_policy; + return device_create_file(&tz->device, &tz->policy_attr); +} + /** * create_trip_attrs - create attributes for trip points * @tz: the thermal zone device @@ -1479,6 +1509,14 @@ struct thermal_zone_device *thermal_zone_device_register(const char *type, /* Retrieve platform level parameters for this zone */ retrieve_zone_params(tz); + result = create_policy_attr(tz); + if (result) { + dev_err(&tz->device, + "create_policy_attr for zone %s failed:%d\n", + tz->type, result); + goto unregister; + } + mutex_lock(&thermal_list_lock); list_add_tail(&tz->node, &thermal_tz_list); if (ops->bind) @@ -1539,6 +1577,8 @@ void thermal_zone_device_unregister(struct thermal_zone_device *tz) device_remove_file(&tz->device, &dev_attr_mode); remove_trip_attrs(tz); + device_remove_file(&tz->device, &tz->policy_attr); + thermal_remove_hwmon_sysfs(tz); release_idr(&thermal_tz_idr, &thermal_idr_lock, tz->id); idr_destroy(&tz->idr); diff --git a/include/linux/thermal.h b/include/linux/thermal.h index f9ce1e2..1d49f05 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -173,6 +173,7 @@ struct thermal_zone_device { struct list_head node; struct delayed_work poll_queue; struct thermal_zone_params *tzp; + struct device_attribute policy_attr; }; /*