From patchwork Mon Aug 27 04:28:16 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: 1376161 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 132423FC71 for ; Mon, 27 Aug 2012 04:29:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751816Ab2H0E3N (ORCPT ); Mon, 27 Aug 2012 00:29:13 -0400 Received: from mga09.intel.com ([134.134.136.24]:4000 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751775Ab2H0E3M (ORCPT ); Mon, 27 Aug 2012 00:29:12 -0400 Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga102.jf.intel.com with ESMTP; 26 Aug 2012 21:29:10 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.80,318,1344236400"; d="scan'208";a="191657066" Received: from dr3-desktop.iind.intel.com ([10.223.107.36]) by orsmga002.jf.intel.com with ESMTP; 26 Aug 2012 21:29:09 -0700 From: Durgadoss R To: lenb@kernel.org, rui.zhang@intel.com Cc: linux-acpi@vger.kernel.org, eduardo.valentin@ti.com, Durgadoss R Subject: [PATCHv2 04/14] Thermal: Add platform level information to thermal.h Date: Mon, 27 Aug 2012 09:58:16 +0530 Message-Id: <1346041706-29642-5-git-send-email-durgadoss.r@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1346041706-29642-1-git-send-email-durgadoss.r@intel.com> References: <1346041706-29642-1-git-send-email-durgadoss.r@intel.com> Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org This patch creates two structures; one to hold bind bind parameters for a thermal zone, and another to store platform layer data for a thermal zone, and defines an extern function to retrieve these parameters from thermal_sys.c. This patch also defines an enum that describes various policies for thermal throttling. Signed-off-by: Durgadoss R --- drivers/thermal/thermal_sys.c | 3 +++ include/linux/thermal.h | 46 +++++++++++++++++++++++++++++++++++++++++ 2 files changed, 49 insertions(+) diff --git a/drivers/thermal/thermal_sys.c b/drivers/thermal/thermal_sys.c index 5e141b5..92a187c 100644 --- a/drivers/thermal/thermal_sys.c +++ b/drivers/thermal/thermal_sys.c @@ -51,6 +51,9 @@ static LIST_HEAD(thermal_tz_list); static LIST_HEAD(thermal_cdev_list); static DEFINE_MUTEX(thermal_list_lock); +int (*get_platform_thermal_params)(struct thermal_zone_device *); +EXPORT_SYMBOL(get_platform_thermal_params); + static int get_idr(struct idr *idr, struct mutex *lock, int *id) { int err; diff --git a/include/linux/thermal.h b/include/linux/thermal.h index 32af124..b644b8e 100644 --- a/include/linux/thermal.h +++ b/include/linux/thermal.h @@ -67,6 +67,12 @@ enum thermal_trend { THERMAL_TREND_DROPPING, /* temperature is dropping */ }; +enum thermal_throttle_policy { + THERMAL_USER_SPACE, + THERMAL_FAIR_SHARE, + THERMAL_STEP_WISE, +}; + /* Events supported by Thermal Netlink */ enum events { THERMAL_AUX0, @@ -162,6 +168,37 @@ struct thermal_zone_device { struct mutex lock; /* protect thermal_instances list */ struct list_head node; struct delayed_work poll_queue; + struct thermal_zone_params *tzp; +}; + +/* Structure that holds binding parameters for a zone */ +struct thermal_bind_params { + struct thermal_cooling_device *cdev; + + /* + * This is a measure of 'how effectively these devices can + * cool 'this' thermal zone. The shall be determined by platform + * characterization. This is on a 'percentage' scale. + * See Documentation/thermal/sysfs-api.txt for more information. + */ + int weight; + + /* + * This is a bit mask that gives the binding relation between this + * thermal zone and cdev, for a particular trip point. + * See Documentation/thermal/sysfs-api.txt for more information. + */ + int trip_mask; + int (*match) (struct thermal_zone_device *tz, + struct thermal_cooling_device *cdev); +}; + +/* Structure to define Thermal Zone parameters */ +struct thermal_zone_params { + const char *zone_name; + enum thermal_throttle_policy throttle_policy; + int num_tbps; /* Number of tbp entries */ + struct thermal_bind_params *tbp; }; struct thermal_genl_event { @@ -188,6 +225,15 @@ void thermal_cooling_device_unregister(struct thermal_cooling_device *); int get_tz_trend(struct thermal_zone_device *, int); struct thermal_instance *get_thermal_instance(struct thermal_zone_device *, struct thermal_cooling_device *, int); +/* + * The platform layer shall define a 'function' that provides the + * parameters for all thermal zones in the platform. This pointer + * should point to that 'function'. + * + * In thermal_zone_device_register() we update the parameters + * for the particular thermal zone. + */ +extern int (*get_platform_thermal_params)(struct thermal_zone_device *); #ifdef CONFIG_NET extern int thermal_generate_netlink_event(u32 orig, enum events event);