From mboxrd@z Thu Jan 1 00:00:00 1970 From: Durgadoss R Subject: [PATCH 03/13] Thermal: Add get trend, get instance API's to thermal_sys Date: Thu, 9 Aug 2012 18:15:55 +0530 Message-ID: <1344516365-7230-4-git-send-email-durgadoss.r@intel.com> References: <1344516365-7230-1-git-send-email-durgadoss.r@intel.com> Return-path: 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 S932467Ab2HIMqU (ORCPT ); Thu, 9 Aug 2012 08:46:20 -0400 In-Reply-To: <1344516365-7230-1-git-send-email-durgadoss.r@intel.com> Sender: linux-acpi-owner@vger.kernel.org List-Id: linux-acpi@vger.kernel.org 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 This patch adds the following API's to thermal_sys.c, that can be used by other Thermal drivers. * get_tz_trend: obtain the trend of the given thermal zone * get_cdev_by_name: obtain cdev pointer given its name * get_thermal_instance: obtain the instance corresponding to the given tz, cdev and the trip point. Signed-off-by: Durgadoss R --- drivers/thermal/thermal_sys.c | 59 +++++++++++++++++++++++++++++++++++++++++ include/linux/thermal.h | 5 ++++ 2 files changed, 64 insertions(+) diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index a0e20f9..998c16e 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -80,6 +80,65 @@ static void release_idr(struct idr *idr, struct mutex *lock, int id) mutex_unlock(lock); } +int get_tz_trend(struct thermal_zone_device *tz, int trip) +{ + enum thermal_trend trend; + + if (!tz->ops->get_trend || tz->ops->get_trend(tz, trip, &trend)) { + if (tz->temperature > tz->last_temperature) + trend = THERMAL_TREND_RAISING; + else if (tz->temperature < tz->last_temperature) + trend = THERMAL_TREND_DROPPING; + else + trend = THERMAL_TREND_STABLE; + } + + return trend; +} +EXPORT_SYMBOL(get_tz_trend); + +struct thermal_cooling_device *get_cdev_by_name(const char *name) +{ + struct thermal_cooling_device *pos; + struct thermal_cooling_device *target_cdev = NULL; + + mutex_lock(&thermal_list_lock); + + list_for_each_entry(pos, &thermal_cdev_list, node) { + if (!strcmp(pos->type, name)) { + target_cdev = pos; + break; + } + } + mutex_unlock(&thermal_list_lock); + + return target_cdev; +} +EXPORT_SYMBOL(get_cdev_by_name); + +struct thermal_instance *get_thermal_instance(struct thermal_zone_device *tz, + struct thermal_cooling_device *cdev, int trip) +{ + struct thermal_instance *pos = NULL; + struct thermal_instance *target_instance = NULL; + + mutex_lock(&tz->lock); + mutex_lock(&cdev->lock); + + list_for_each_entry(pos, &tz->thermal_instances, tz_node) { + if (pos->tz == tz && pos->trip == trip && pos->cdev == cdev) { + target_instance = pos; + break; + } + } + + mutex_unlock(&cdev->lock); + mutex_unlock(&tz->lock); + + return target_instance; +} +EXPORT_SYMBOL(get_thermal_instance); + /* sys I/F for thermal zone */ #define to_thermal_zone(_dev) \ diff --git a/include/linux/thermal.h b/include/linux/thermal.h index f25df23..757a007 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -208,6 +208,11 @@ struct thermal_cooling_device *thermal_cooling_device_register(char *, void *, const struct thermal_cooling_device_ops *); void thermal_cooling_device_unregister(struct thermal_cooling_device *); +int get_tz_trend(struct thermal_zone_device *, int); +struct thermal_cooling_device *get_cdev_by_name(const char *); +struct thermal_instance *get_thermal_instance(struct thermal_zone_device *, + struct thermal_cooling_device *, int); + #ifdef CONFIG_NET extern int thermal_generate_netlink_event(u32 orig, enum events event); #else -- 1.7.9.5