From patchwork Thu Jul 26 08:41:13 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Zhang Rui X-Patchwork-Id: 1240641 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id CA0D13FDFB for ; Thu, 26 Jul 2012 08:41:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751394Ab2GZIlq (ORCPT ); Thu, 26 Jul 2012 04:41:46 -0400 Received: from mga02.intel.com ([134.134.136.20]:5721 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751582Ab2GZIlo (ORCPT ); Thu, 26 Jul 2012 04:41:44 -0400 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 26 Jul 2012 01:41:43 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,352,1309762800"; d="scan'208";a="171639109" Received: from rui-x220.sh.intel.com ([10.239.193.100]) by orsmga001.jf.intel.com with ESMTP; 26 Jul 2012 01:41:41 -0700 From: Zhang Rui To: "Rafael J. Wysocki" , Matthew Garrett , Len Brown , R Durgadoss , Eduardo Valentin , Amit Kachhap , Wei Ni , Zhang Rui Cc: linux-acpi@vger.kernel.org, linux-pm@vger.kernel.org Subject: [PATCH V4 03/13] Thermal: set upper and lower limits Date: Thu, 26 Jul 2012 16:41:13 +0800 Message-Id: <1343292083-2047-4-git-send-email-rui.zhang@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1343292083-2047-1-git-send-email-rui.zhang@intel.com> References: <1343292083-2047-1-git-send-email-rui.zhang@intel.com> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org set upper and lower limits when binding a thermal cooling device to a thermal zone device. Reviewed-by: Rafael J. Wysocki Signed-off-by: Zhang Rui Reviewed-by: Eduardo Valentin --- Documentation/thermal/sysfs-api.txt | 9 +++++- drivers/acpi/thermal.c | 53 +++++++++++++++++++++++------------ drivers/platform/x86/acerhdf.c | 3 +- drivers/thermal/thermal_sys.c | 23 ++++++++++----- include/linux/thermal.h | 5 +++- 5 files changed, 65 insertions(+), 28 deletions(-) diff --git a/Documentation/thermal/sysfs-api.txt b/Documentation/thermal/sysfs-api.txt index c087dbc..ca1a1a3 100644 --- a/Documentation/thermal/sysfs-api.txt +++ b/Documentation/thermal/sysfs-api.txt @@ -84,7 +84,8 @@ temperature) and throttle appropriate devices. 1.3 interface for binding a thermal zone device with a thermal cooling device 1.3.1 int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, - int trip, struct thermal_cooling_device *cdev); + int trip, struct thermal_cooling_device *cdev, + unsigned long upper, unsigned long lower); This interface function bind a thermal cooling device to the certain trip point of a thermal zone device. @@ -93,6 +94,12 @@ temperature) and throttle appropriate devices. cdev: thermal cooling device trip: indicates which trip point the cooling devices is associated with in this thermal zone. + upper:the Maximum cooling state for this trip point. + THERMAL_NO_LIMIT means no upper limit, + and the cooling device can be in max_state. + lower:the Minimum cooling state can be used for this trip point. + THERMAL_NO_LIMIT means no lower limit, + and the cooling device can be in cooling state 0. 1.3.2 int thermal_zone_unbind_cooling_device(struct thermal_zone_device *tz, int trip, struct thermal_cooling_device *cdev); diff --git a/drivers/acpi/thermal.c b/drivers/acpi/thermal.c index 8275e7b..b48ec3e 100644 --- a/drivers/acpi/thermal.c +++ b/drivers/acpi/thermal.c @@ -727,11 +727,9 @@ static int thermal_notify(struct thermal_zone_device *thermal, int trip, return 0; } -typedef int (*cb)(struct thermal_zone_device *, int, - struct thermal_cooling_device *); static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, struct thermal_cooling_device *cdev, - cb action) + bool bind) { struct acpi_device *device = cdev->devdata; struct acpi_thermal *tz = thermal->devdata; @@ -755,11 +753,19 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, i++) { handle = tz->trips.passive.devices.handles[i]; status = acpi_bus_get_device(handle, &dev); - if (ACPI_SUCCESS(status) && (dev == device)) { - result = action(thermal, trip, cdev); - if (result) - goto failed; - } + if (ACPI_FAILURE(status) || dev != device) + continue; + if (bind) + result = + thermal_zone_bind_cooling_device + (thermal, trip, cdev, + THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); + else + result = + thermal_zone_unbind_cooling_device + (thermal, trip, cdev); + if (result) + goto failed; } } @@ -772,11 +778,17 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, j++) { handle = tz->trips.active[i].devices.handles[j]; status = acpi_bus_get_device(handle, &dev); - if (ACPI_SUCCESS(status) && (dev == device)) { - result = action(thermal, trip, cdev); - if (result) - goto failed; - } + if (ACPI_FAILURE(status) || dev != device) + continue; + if (bind) + result = thermal_zone_bind_cooling_device + (thermal, trip, cdev, + THERMAL_NO_LIMIT, THERMAL_NO_LIMIT); + else + result = thermal_zone_unbind_cooling_device + (thermal, trip, cdev); + if (result) + goto failed; } } @@ -784,7 +796,14 @@ static int acpi_thermal_cooling_device_cb(struct thermal_zone_device *thermal, handle = tz->devices.handles[i]; status = acpi_bus_get_device(handle, &dev); if (ACPI_SUCCESS(status) && (dev == device)) { - result = action(thermal, -1, cdev); + if (bind) + result = thermal_zone_bind_cooling_device + (thermal, -1, cdev, + THERMAL_NO_LIMIT, + THERMAL_NO_LIMIT); + else + result = thermal_zone_unbind_cooling_device + (thermal, -1, cdev); if (result) goto failed; } @@ -798,16 +817,14 @@ static int acpi_thermal_bind_cooling_device(struct thermal_zone_device *thermal, struct thermal_cooling_device *cdev) { - return acpi_thermal_cooling_device_cb(thermal, cdev, - thermal_zone_bind_cooling_device); + return acpi_thermal_cooling_device_cb(thermal, cdev, true); } static int acpi_thermal_unbind_cooling_device(struct thermal_zone_device *thermal, struct thermal_cooling_device *cdev) { - return acpi_thermal_cooling_device_cb(thermal, cdev, - thermal_zone_unbind_cooling_device); + return acpi_thermal_cooling_device_cb(thermal, cdev, false); } static const struct thermal_zone_device_ops acpi_thermal_zone_ops = { diff --git a/drivers/platform/x86/acerhdf.c b/drivers/platform/x86/acerhdf.c index 39abb15..a207466 100644 --- a/drivers/platform/x86/acerhdf.c +++ b/drivers/platform/x86/acerhdf.c @@ -329,7 +329,8 @@ static int acerhdf_bind(struct thermal_zone_device *thermal, if (cdev != cl_dev) return 0; - if (thermal_zone_bind_cooling_device(thermal, 0, cdev)) { + if (thermal_zone_bind_cooling_device(thermal, 0, cdev, + THERMAL_NO_LIMIT, THERMAL_NO_LIMIT)) { pr_err("error binding cooling dev\n"); return -EINVAL; } diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 008e2eb..62b4279 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -315,8 +315,9 @@ passive_store(struct device *dev, struct device_attribute *attr, if (!strncmp("Processor", cdev->type, sizeof("Processor"))) thermal_zone_bind_cooling_device(tz, - THERMAL_TRIPS_NONE, - cdev); + THERMAL_TRIPS_NONE, cdev, + THERMAL_NO_LIMIT, + THERMAL_NO_LIMIT); } mutex_unlock(&thermal_list_lock); if (!tz->passive_delay) @@ -801,7 +802,8 @@ static void thermal_zone_device_check(struct work_struct *work) */ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, int trip, - struct thermal_cooling_device *cdev) + struct thermal_cooling_device *cdev, + unsigned long upper, unsigned long lower) { struct thermal_cooling_device_instance *dev; struct thermal_cooling_device_instance *pos; @@ -825,6 +827,15 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, if (tz != pos1 || cdev != pos2) return -EINVAL; + cdev->ops->get_max_state(cdev, &max_state); + + /* lower default 0, upper default max_state */ + lower = lower == THERMAL_NO_LIMIT ? 0 : lower; + upper = upper == THERMAL_NO_LIMIT ? max_state : upper; + + if (lower > upper || upper > max_state) + return -EINVAL; + dev = kzalloc(sizeof(struct thermal_cooling_device_instance), GFP_KERNEL); if (!dev) @@ -832,10 +843,8 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, dev->tz = tz; dev->cdev = cdev; dev->trip = trip; - - cdev->ops->get_max_state(cdev, &max_state); - dev->upper = max_state; - dev->lower = 0; + dev->upper = upper; + dev->lower = lower; result = get_idr(&tz->idr, &tz->lock, &dev->id); if (result) diff --git a/include/linux/thermal.h b/include/linux/thermal.h index cfc8d90..a43b12c 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -75,6 +75,8 @@ struct thermal_cooling_device_ops { int (*set_cur_state) (struct thermal_cooling_device *, unsigned long); }; +#define THERMAL_NO_LIMIT -1UL /* no upper/lower limit requirement */ + #define THERMAL_TRIPS_NONE -1 #define THERMAL_MAX_TRIPS 12 #define THERMAL_NAME_LENGTH 20 @@ -157,7 +159,8 @@ struct thermal_zone_device *thermal_zone_device_register(char *, int, int, void thermal_zone_device_unregister(struct thermal_zone_device *); int thermal_zone_bind_cooling_device(struct thermal_zone_device *, int, - struct thermal_cooling_device *); + struct thermal_cooling_device *, + unsigned long, unsigned long); int thermal_zone_unbind_cooling_device(struct thermal_zone_device *, int, struct thermal_cooling_device *); void thermal_zone_device_update(struct thermal_zone_device *);