From patchwork Tue Dec 18 09:29:37 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: 1891071 X-Patchwork-Delegate: rui.zhang@intel.com 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 403373FCD4 for ; Tue, 18 Dec 2012 09:34:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754498Ab2LRJeY (ORCPT ); Tue, 18 Dec 2012 04:34:24 -0500 Received: from mga03.intel.com ([143.182.124.21]:52766 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751233Ab2LRJeW (ORCPT ); Tue, 18 Dec 2012 04:34:22 -0500 Received: from azsmga001.ch.intel.com ([10.2.17.19]) by azsmga101.ch.intel.com with ESMTP; 18 Dec 2012 01:34:14 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.84,308,1355126400"; d="scan'208";a="233077928" Received: from dr3-desktop.iind.intel.com ([10.223.107.127]) by azsmga001.ch.intel.com with ESMTP; 18 Dec 2012 01:34:10 -0800 From: Durgadoss R To: rui.zhang@intel.com, linux-pm@vger.kernel.org Cc: linux-kernel@vger.kernel.org, hongbo.zhang@linaro.org, wni@nvidia.com, Durgadoss R Subject: [PATCH 8/8] Thermal: Dummy driver used for testing Date: Tue, 18 Dec 2012 14:59:37 +0530 Message-Id: <1355822977-4804-9-git-send-email-durgadoss.r@intel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1355822977-4804-1-git-send-email-durgadoss.r@intel.com> References: <1355822977-4804-1-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 has a dummy driver that can be used for testing purposes. This patch is not for merge. Signed-off-by: Durgadoss R --- drivers/thermal/Kconfig | 5 + drivers/thermal/Makefile | 3 + drivers/thermal/thermal_test.c | 315 ++++++++++++++++++++++++++++++++++++++++ 3 files changed, 323 insertions(+) create mode 100644 drivers/thermal/thermal_test.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index c5ba3340..3b92a76 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -136,4 +136,9 @@ config DB8500_CPUFREQ_COOLING bound cpufreq cooling device turns active to set CPU frequency low to cool down the CPU. +config THERMAL_TEST + tristate "test driver" + help + Enable this to test the thermal framework. + endif diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index d8da683..02c3edb 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -18,3 +18,6 @@ obj-$(CONFIG_RCAR_THERMAL) += rcar_thermal.o obj-$(CONFIG_EXYNOS_THERMAL) += exynos_thermal.o obj-$(CONFIG_DB8500_THERMAL) += db8500_thermal.o obj-$(CONFIG_DB8500_CPUFREQ_COOLING) += db8500_cpufreq_cooling.o + +# dummy driver for testing +obj-$(CONFIG_THERMAL_TEST) += thermal_test.o diff --git a/drivers/thermal/thermal_test.c b/drivers/thermal/thermal_test.c new file mode 100644 index 0000000..5a11e34 --- /dev/null +++ b/drivers/thermal/thermal_test.c @@ -0,0 +1,315 @@ +/* + * thermal_test.c - This driver can be used to test Thermal + * Framework changes. Not specific to any + * platform. Fills the log buffer generously ;) + * + * Copyright (C) 2012 Intel Corporation + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; version 2 of the License. + * + * This program is distributed in the hope that it will be useful, but + * WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + * General Public License for more details. + * + * You should have received a copy of the GNU General Public License along + * with this program; if not, write to the Free Software Foundation, Inc., + * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. + * + * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ + * Author: Durgadoss R + */ + +#define pr_fmt(fmt) "thermal_test: " fmt + +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define MAX_THERMAL_ZONES 2 +#define MAX_THERMAL_SENSORS 2 +#define MAX_COOLING_DEVS 4 +#define NUM_THRESHOLDS 3 + +static struct ts_data { + int curr_temp; + int flag; +} ts_data; + +int active_trips[10] = {100, 90, 80, 70, 60, 50, 40, 30, 20, 10}; +int passive_trips[5] = {100, 90, 60, 50, 40}; + +static struct platform_device *pdev; +static unsigned long cur_cdev_state = 2; +static struct thermal_sensor *ts, *ts1; +static struct thermal_zone *tz; +static struct thermal_cooling_device *cdev; + +static long thermal_thresholds[NUM_THRESHOLDS] = {30000, 40000, 50000}; + +static struct thermal_trip_point trip = { + .hot = 90, + .crit = 100, + .num_passive_trips = 5, + .passive_trips = passive_trips, + .num_active_trips = 10, + .active_trips = active_trips, + .active_trip_mask = 0xCFF, +}; + +static struct thermal_trip_point trip1 = { + .hot = 95, + .crit = 125, + .num_passive_trips = 0, + .passive_trips = passive_trips, + .num_active_trips = 6, + .active_trips = active_trips, + .active_trip_mask = 0xFF, +}; + +static int read_cur_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + *state = cur_cdev_state; + return 0; +} + +static int write_cur_state(struct thermal_cooling_device *cdev, + unsigned long state) +{ + cur_cdev_state = state; + return 0; +} + +static int read_max_state(struct thermal_cooling_device *cdev, + unsigned long *state) +{ + *state = 5; + return 0; +} + +static int read_curr_temp(struct thermal_sensor *ts, long *temp) +{ + *temp = ts_data.curr_temp; + return 0; +} + +static ssize_t +flag_show(struct device *dev, struct device_attribute *devattr, char *buf) +{ + return sprintf(buf, "%d\n", ts_data.flag); +} + +static ssize_t +flag_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + long flag; + + if (kstrtol(buf, 10, &flag)) + return -EINVAL; + + ts_data.flag = flag; + + if (flag == 0) { + thermal_sensor_unregister(ts); + ts = NULL; + pr_err("thermal_sensor_unregister (ts) done\n"); + } else if (flag == 1) { + thermal_sensor_unregister(ts1); + ts1 = NULL; + pr_err("thermal_sensor_unregister (ts1) done\n"); + } else if (flag == 2) { + thermal_cooling_device_unregister(cdev); + cdev = NULL; + pr_err("cdev unregister (cdev) done\n"); + } else if (flag == 3) { + if (tz) + remove_thermal_zone(tz); + tz = NULL; + pr_err("removed thermal zone\n"); + } + + return count; +} + +static ssize_t +temp_show(struct device *dev, struct device_attribute *devattr, char *buf) +{ + return sprintf(buf, "%d\n", ts_data.curr_temp); +} + +static int read_threshold(struct thermal_sensor *ts, int indx, long *val) +{ + if (indx < 0 || indx >= NUM_THRESHOLDS) + return -EINVAL; + + *val = thermal_thresholds[indx]; + return 0; +} + +static int write_threshold(struct thermal_sensor *ts, int indx, long val) +{ + if (indx < 0 || indx >= NUM_THRESHOLDS) + return -EINVAL; + + thermal_thresholds[indx] = val; + return 0; +} + +static ssize_t +temp_store(struct device *dev, struct device_attribute *attr, + const char *buf, size_t count) +{ + long temp; + + if (kstrtol(buf, 10, &temp)) + return -EINVAL; + + ts_data.curr_temp = temp; + return count; +} + +static struct thermal_sensor_ops ts_ops = { + .get_temp = read_curr_temp, + .get_threshold = read_threshold, + .set_threshold = write_threshold, +}; + +static struct thermal_sensor_ops ts1_ops = { + .get_temp = read_curr_temp, + .get_threshold = read_threshold, + .set_threshold = write_threshold, +}; + +static struct thermal_cooling_device_ops cdev_ops = { + .get_cur_state = read_cur_state, + .set_cur_state = write_cur_state, + .get_max_state = read_max_state, +}; + +static DEVICE_ATTR(test_temp, S_IRUGO | S_IWUSR, temp_show, temp_store); +static DEVICE_ATTR(sensor_enable, S_IRUGO | S_IWUSR, flag_show, flag_store); + +static int thermal_test_probe(struct platform_device *pdev) +{ + int ret; + + ts_data.curr_temp = 30000; + ts_data.flag = 1; + + ts = thermal_sensor_register("ts", NUM_THRESHOLDS, &ts_ops, &ts_data); + if (!ts) { + pr_err("thermal_sensor_register failed:\n"); + return -EINVAL; + } + + ts1 = thermal_sensor_register("ts1", NUM_THRESHOLDS, &ts1_ops, NULL); + + cdev = thermal_cooling_device_register("cdev", NULL, &cdev_ops); + if (!cdev) { + pr_err("cdev_register failed:\n"); + return -EINVAL; + } + + device_create_file(&pdev->dev, &dev_attr_test_temp); + device_create_file(&pdev->dev, &dev_attr_sensor_enable); + + /* Create a zone */ + tz = create_thermal_zone("myZone", NULL); + if (!tz) { + pr_err("create_thermal_zone failed:\n"); + return -EINVAL; + } + + pr_err("Zone created successfully..\n"); + + ret = add_sensor_to_zone(tz, ts); + if (ret) { + pr_err("add_sensor_to_zone failed:%d\n", ret); + return ret; + } + + ret = add_sensor_to_zone(tz, ts1); + pr_err("add_sensor (ts1) ret_val: %d\n", ret); + + ret = add_cdev_to_zone(tz, cdev); + pr_err("add_cdev_to_zone (cdev) ret_val: %d\n", ret); + + ret = add_sensor_trip_info(tz, ts, &trip); + ret = add_sensor_trip_info(tz, ts1, &trip1); + pr_err("add_sensor_trip_info (ts) ret_val: %d\n", ret); + return 0; +} + +static int thermal_test_remove(struct platform_device *pdev) +{ + device_remove_file(&pdev->dev, &dev_attr_test_temp); + device_remove_file(&pdev->dev, &dev_attr_sensor_enable); + + return 0; +} + +/********************************************************************* + * Driver initialization and finalization + *********************************************************************/ + +#define DRIVER_NAME "thermal_test" + +static const struct platform_device_id therm_id_table[] = { + { DRIVER_NAME, 1 }, +}; + +static struct platform_driver thermal_test_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + }, + .probe = thermal_test_probe, + .remove = __devexit_p(thermal_test_remove), + .id_table = therm_id_table, +}; + +static int __init thermal_test_init(void) +{ + int ret; + + ret = platform_driver_register(&thermal_test_driver); + if (ret) { + pr_err("platform driver register failed:%d\n", ret); + return ret; + } + + pdev = platform_device_register_simple(DRIVER_NAME, -1, NULL, 0); + if (IS_ERR(pdev)) { + ret = PTR_ERR(pdev); + pr_err("platform device register failed:%d\n", ret); + platform_driver_unregister(&thermal_test_driver); + } + + return ret; +} + +static void __exit thermal_test_exit(void) +{ + pr_err("in thermal_test_exit\n"); + platform_device_unregister(pdev); + platform_driver_unregister(&thermal_test_driver); +} + +module_init(thermal_test_init); +module_exit(thermal_test_exit); + +MODULE_AUTHOR("Durgadoss R "); +MODULE_DESCRIPTION("A dummy driver to test Thermal Framework"); +MODULE_LICENSE("GPL");