From patchwork Thu Jul 26 08:41:12 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Zhang, Rui" X-Patchwork-Id: 1240611 Return-Path: X-Original-To: patchwork-linux-pm@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 AA3323FDFB for ; Thu, 26 Jul 2012 08:41:43 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751480Ab2GZIln (ORCPT ); Thu, 26 Jul 2012 04:41:43 -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 S1751394Ab2GZIll (ORCPT ); Thu, 26 Jul 2012 04:41:41 -0400 Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga101.jf.intel.com with ESMTP; 26 Jul 2012 01:41:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.67,352,1309762800"; d="scan'208";a="171639104" Received: from rui-x220.sh.intel.com ([10.239.193.100]) by orsmga001.jf.intel.com with ESMTP; 26 Jul 2012 01:41:39 -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 02/13] Thermal: Introduce cooling states range support Date: Thu, 26 Jul 2012 16:41:12 +0800 Message-Id: <1343292083-2047-3-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-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org As the active cooling devices can have multiple cooling states, we may want only several cooling states for a certain trip point, and other cooling states for other active trip points. To do this, we should be able to describe the cooling device behavior for a certain trip point, rather than for the entire thermal zone. And when updating thermal zone, we need to check the upper and lower limit to make sure the cooling device is set to the proper cooling state. Note that this patch will not bring any different behavior as upper limit is set to max_state and lower limit is set to 0 in this patch, for now. Next patch will set these to real values. Reviewed-by: Rafael J. Wysocki Signed-off-by: Zhang Rui Reviewed-by: Eduardo Valentin --- drivers/thermal/thermal_sys.c | 25 +++++++++++++++++++++---- 1 file changed, 21 insertions(+), 4 deletions(-) diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 05f42cd..008e2eb 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -41,12 +41,19 @@ MODULE_AUTHOR("Zhang Rui"); MODULE_DESCRIPTION("Generic thermal management sysfs support"); MODULE_LICENSE("GPL"); +/* + * This structure is used to describe the behavior of + * a certain cooling device on a certain trip point + * in a certain thermal zone + */ struct thermal_cooling_device_instance { int id; char name[THERMAL_NAME_LENGTH]; struct thermal_zone_device *tz; struct thermal_cooling_device *cdev; int trip; + unsigned long upper; /* Highest cooling state for this trip point */ + unsigned long lower; /* Lowest cooling state for this trip point */ char attr_name[THERMAL_NAME_LENGTH]; struct device_attribute attr; struct list_head node; @@ -800,6 +807,7 @@ int thermal_zone_bind_cooling_device(struct thermal_zone_device *tz, struct thermal_cooling_device_instance *pos; struct thermal_zone_device *pos1; struct thermal_cooling_device *pos2; + unsigned long max_state; int result; if (trip >= tz->trips || (trip < 0 && trip != THERMAL_TRIPS_NONE)) @@ -824,6 +832,11 @@ 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; + result = get_idr(&tz->idr, &tz->lock, &dev->id); if (result) goto free_mem; @@ -1103,11 +1116,15 @@ void thermal_zone_device_update(struct thermal_zone_device *tz) cdev->ops->get_max_state(cdev, &max_state); if (temp >= trip_temp) - cur_state = cur_state < max_state ? - (cur_state + 1) : max_state; + cur_state = + cur_state < instance->upper ? + (cur_state + 1) : + instance->upper; else - cur_state = cur_state > 0 ? - (cur_state - 1) : 0; + cur_state = + cur_state > instance->lower ? + (cur_state - 1) : + instance->lower; cdev->ops->set_cur_state(cdev, cur_state); }