From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1764460AbcJaQQt (ORCPT ); Mon, 31 Oct 2016 12:16:49 -0400 Received: from mail1.bemta5.messagelabs.com ([195.245.231.139]:56450 "EHLO mail1.bemta5.messagelabs.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757242AbcJaQPo (ORCPT ); Mon, 31 Oct 2016 12:15:44 -0400 X-Brightmail-Tracker: H4sIAAAAAAAAA+NgFprPKsWRWlGSWpSXmKPExsUSt3Opsa5Wnni Ewc4f5hZTHz5hs5h/5ByrxeFFLxgt5l+5xmpx/+tRRotvVzqYLG5++sZqcXnXHDaLz71HGC1u rNvHbvFk4Rkmi6XXLzJZtO49AuQ+7GOzuDyxk93i1owXrA4CHmvmrWH02DnrLrvHtc1iHov3v GTy2LSqk83jzrU9bB47vzewe3zeJBfAEcWamZeUX5HAmrH10Dnmgr7Yil873rE2MLb7dzFycQ gJrGeU2Dz3GEsXIyeQUyGxfe10dhCbVyBZ4m/vf9YuRg4OTgFHiS9dLhAlDhI7L15hA7HZBAw l5r15zwhiswioStxbcxUsLiwQLbF2eiPYSBGB+YwSh27rg+xiFnjCLLFv3gJGiPmCEidnPgEr YhaQkDj44gUzyC4hAS2J5cciQcISAvYS099fBQtLCOhLNB6LhQgbSnyf9Y0FwjaXaFjUyTiBU XAWkqGzkAxdwMi0ilG9OLWoLLVI10wvqSgzPaMkNzEzR9fQwFQvN7W4ODE9NScxqVgvOT93Ey Mw4hiAYAfj1AbnQ4ySHExKorxfw8QjhPiS8lMqMxKLM+KLSnNSiw8xynBwKEnwWuQC5QSLUtN TK9Iyc4CxD5OW4OBREuHtygFK8xYXJOYWZ6ZDpE4xKkqJ81qB9AmAJDJK8+DaYOnmEqOslDAv I9AhQjwFqUW5mSWo8q8YxTkYlYR52UCm8GTmlcBNfwW0mAlocVqhCMjikkSElFQDY7rciSfMh ben3LzOwaf3YO/yj+w3f/70+Ro+hUPnR7i9ROF9I4UX1SqnZ88JsZac2ux08qGIm6Pg+8u5Uk s9SvIvHFqS/33Zdk/Ot9deVDDc+S48wfHzpU6+hTf+zBd9nszybdOOp+9/LyuOFebzWrL8MO/ bFK8EFsVtU5LvHK+XrLpVYHqnnVuJpTgj0VCLuag4EQAB8ep+MgMAAA== X-Env-Sender: stwiss.opensource@diasemi.com X-Msg-Ref: server-6.tower-179.messagelabs.com!1477930534!63574082!10 X-Originating-IP: [94.185.165.51] X-StarScan-Received: X-StarScan-Version: 9.0.13; banners=-,-,- X-VirusChecked: Checked Message-ID: <52d74c72cc445d2bc911014f38b79c1f10426878.1477929725.git.stwiss.opensource@diasemi.com> In-Reply-To: References: From: Steve Twiss Date: Mon, 31 Oct 2016 16:02:05 +0000 Subject: [PATCH V3 8/9] thermal: da9062/61: Thermal junction temperature monitoring driver To: Eduardo Valentin , LINUX-KERNEL , LINUX-PM , Zhang Rui CC: DEVICETREE , Dmitry Torokhov , Guenter Roeck , LINUX-INPUT , LINUX-WATCHDOG , Lee Jones , Liam Girdwood , Mark Brown , Mark Rutland , Rob Herring , Support Opensource , Wim Van Sebroeck MIME-Version: 1.0 Content-Type: text/plain X-KSE-AttachmentFiltering-Interceptor-Info: protection disabled X-KSE-ServerInfo: sw-ex-cashub01.diasemi.com, 9 X-KSE-Antivirus-Interceptor-Info: scan successful X-KSE-Antivirus-Info: Clean, bases: 31/10/2016 13:14:00 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Steve Twiss Add junction temperature monitoring supervisor device driver, compatible with the DA9062 and DA9061 PMICs. A MODULE_DEVICE_TABLE() macro is added. If the PMIC's internal junction temperature rises above TEMP_WARN (125 degC) an interrupt is issued. This TEMP_WARN level is defined as the THERMAL_TRIP_HOT trip-wire inside the device driver. The thermal triggering mechanism is interrupt based and happens when the temperature rises above a given threshold level. The component cannot return an exact temperature, it only has knowledge if the temperature is above or below a given threshold value. A status bit must be polled to detect when the temperature falls below that threshold level again. A kernel work queue is configured to repeatedly poll and detect when the temperature falls below this trip-wire, between 1 and 10 second intervals (defaulting at 3 seconds). This first level of temperature supervision is intended for non-invasive temperature control, where the necessary measures for cooling the system down are left to the host software. Signed-off-by: Steve Twiss --- This patch applies against linux-next and v4.8 v2 -> v3 - Patch renamed from [PATCH V2 09/10] to [PATCH V3 8/9] - Addition of MODULE_DEVICE_TABLE macro to allow modinfo additions v1 -> v2 - Patch renamed from [PATCH V1 05/10] to [PATCH V2 09/10] -- these changes were made to fix checkpatch warnings caused by the patch set dependency order - List the header files in alphabetical order - Remove "GPL v2" and replace with MODULE_LICENSE("GPL") to match the copyright "GNU Public License v2 or later" option in the header comment for this file. See the allowed identifiers in the file include/linux/module.h +170 - Remove notify function "da9062_thermal_notify" function. - MODULE_AUTHOR() macros removes Company Name and just gives Name in accordance with include/linux/module.h +200 - Remove the compatible "dlg,da9061-thermal" option in the of_device_id struct table. This patch now assumes the use of a DA9062 fallback compatible string in the DTS when using the DA9061 thermal component of the DA9061 device. - Re-ordered some assignments earlier in the probe() for thermal->hw, thermal->polling_period, thermal->mode, thermal->dev - Added further information in the patch description to explain the use of the device driver's built-in work-queue. Regards, Steve Twiss, Dialog Semiconductor Ltd. drivers/thermal/Kconfig | 10 ++ drivers/thermal/Makefile | 1 + drivers/thermal/da9062-thermal.c | 291 +++++++++++++++++++++++++++++++++++++++ 3 files changed, 302 insertions(+) create mode 100644 drivers/thermal/da9062-thermal.c diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 2d702ca..da58e54 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -272,6 +272,16 @@ config DB8500_CPUFREQ_COOLING bound cpufreq cooling device turns active to set CPU frequency low to cool down the CPU. +config DA9062_THERMAL + tristate "DA9062/DA9061 Dialog Semiconductor thermal driver" + depends on MFD_DA9062 + depends on OF + help + Enable this for the Dialog Semiconductor thermal sensor driver. + This will report PMIC junction over-temperature for one thermal trip + zone. + Compatible with the DA9062 and DA9061 PMICs. + config INTEL_POWERCLAMP tristate "Intel PowerClamp idle injection driver" depends on THERMAL diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 10b07c1..0a2b3f2 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -38,6 +38,7 @@ obj-$(CONFIG_ARMADA_THERMAL) += armada_thermal.o obj-$(CONFIG_TANGO_THERMAL) += tango_thermal.o obj-$(CONFIG_IMX_THERMAL) += imx_thermal.o obj-$(CONFIG_DB8500_CPUFREQ_COOLING) += db8500_cpufreq_cooling.o +obj-$(CONFIG_DA9062_THERMAL) += da9062-thermal.o obj-$(CONFIG_INTEL_POWERCLAMP) += intel_powerclamp.o obj-$(CONFIG_X86_PKG_TEMP_THERMAL) += x86_pkg_temp_thermal.o obj-$(CONFIG_INTEL_SOC_DTS_IOSF_CORE) += intel_soc_dts_iosf.o diff --git a/drivers/thermal/da9062-thermal.c b/drivers/thermal/da9062-thermal.c new file mode 100644 index 0000000..1f0af22 --- /dev/null +++ b/drivers/thermal/da9062-thermal.c @@ -0,0 +1,291 @@ +/* + * Thermal device driver for DA9062 and DA9061 + * Copyright (C) 2016 Dialog Semiconductor Ltd. + * + * 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; either version 2 + * of the License, or (at your option) any later version. + * + * 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. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include + +#define DA9062_DEFAULT_POLLING_MS_PERIOD 3000 +#define DA9062_MAX_POLLING_MS_PERIOD 10000 +#define DA9062_MIN_POLLING_MS_PERIOD 1000 + +#define DA9062_MILLI_CELSIUS(t) ((t)*1000) + +struct da9062_thermal_config { + const char *name; +}; + +struct da9062_thermal { + struct da9062 *hw; + struct delayed_work work; + struct thermal_zone_device *zone; + enum thermal_device_mode mode; + unsigned int polling_period; + struct mutex lock; + int temperature; + int irq; + const struct da9062_thermal_config *config; + struct device *dev; +}; + +static void da9062_thermal_poll_on(struct work_struct *work) +{ + struct da9062_thermal *thermal = container_of(work, + struct da9062_thermal, + work.work); + unsigned int val; + int ret; + + /* clear E_TEMP */ + ret = regmap_write(thermal->hw->regmap, + DA9062AA_EVENT_B, + DA9062AA_E_TEMP_MASK); + if (ret < 0) { + dev_err(thermal->dev, + "Cannot clear the TJUNC temperature status\n"); + goto err_enable_irq; + } + + /* Now read E_TEMP again: it is acting like a status bit. + * If over-temperature, then this status will be true. + * If not over-temperature, this status will be false. + */ + ret = regmap_read(thermal->hw->regmap, + DA9062AA_EVENT_B, + &val); + if (ret < 0) { + dev_err(thermal->dev, + "Cannot check the TJUNC temperature status\n"); + goto err_enable_irq; + } else { + if (val & DA9062AA_E_TEMP_MASK) { + mutex_lock(&thermal->lock); + thermal->temperature = DA9062_MILLI_CELSIUS(125); + mutex_unlock(&thermal->lock); + thermal_zone_device_update(thermal->zone); + + schedule_delayed_work(&thermal->work, + msecs_to_jiffies(thermal->polling_period)); + return; + } else { + mutex_lock(&thermal->lock); + thermal->temperature = DA9062_MILLI_CELSIUS(0); + mutex_unlock(&thermal->lock); + thermal_zone_device_update(thermal->zone); + } + } + +err_enable_irq: + enable_irq(thermal->irq); +} + +static irqreturn_t da9062_thermal_irq_handler(int irq, void *data) +{ + struct da9062_thermal *thermal = data; + + disable_irq_nosync(thermal->irq); + schedule_delayed_work(&thermal->work, 0); + + return IRQ_HANDLED; +} + +static int da9062_thermal_get_mode(struct thermal_zone_device *z, + enum thermal_device_mode *mode) +{ + struct da9062_thermal *thermal = z->devdata; + *mode = thermal->mode; + return 0; +} + +static int da9062_thermal_get_trip_type(struct thermal_zone_device *z, + int trip, + enum thermal_trip_type *type) +{ + struct da9062_thermal *thermal = z->devdata; + + switch (trip) { + case 0: + *type = THERMAL_TRIP_HOT; + break; + default: + dev_err(thermal->dev, + "Driver does not support more than 1 trip-wire\n"); + return -EINVAL; + } + + return 0; +} + +static int da9062_thermal_get_trip_temp(struct thermal_zone_device *z, + int trip, + int *temp) +{ + struct da9062_thermal *thermal = z->devdata; + + switch (trip) { + case 0: + *temp = DA9062_MILLI_CELSIUS(125); + break; + default: + dev_err(thermal->dev, + "Driver does not support more than 1 trip-wire\n"); + return -EINVAL; + } + + return 0; +} + +static int da9062_thermal_get_temp(struct thermal_zone_device *z, + int *temp) +{ + struct da9062_thermal *thermal = z->devdata; + + mutex_lock(&thermal->lock); + *temp = thermal->temperature; + mutex_unlock(&thermal->lock); + + return 0; +} + +static struct thermal_zone_device_ops da9062_thermal_ops = { + .get_temp = da9062_thermal_get_temp, + .get_mode = da9062_thermal_get_mode, + .get_trip_type = da9062_thermal_get_trip_type, + .get_trip_temp = da9062_thermal_get_trip_temp, +}; + +static const struct da9062_thermal_config da9062_config = { + .name = "da9062-thermal", +}; + +static const struct of_device_id da9062_compatible_reg_id_table[] = { + { .compatible = "dlg,da9062-thermal", .data = &da9062_config }, + { }, +}; + +MODULE_DEVICE_TABLE(of, da9062_compatible_reg_id_table); + +static int da9062_thermal_probe(struct platform_device *pdev) +{ + struct da9062 *chip = dev_get_drvdata(pdev->dev.parent); + struct da9062_thermal *thermal; + unsigned int pp_tmp = DA9062_DEFAULT_POLLING_MS_PERIOD; + const struct of_device_id *match; + int ret = 0; + + match = of_match_node(da9062_compatible_reg_id_table, + pdev->dev.of_node); + if (!match) + return -ENXIO; + + if (pdev->dev.of_node) { + if (!of_property_read_u32(pdev->dev.of_node, + "dlg,tjunc-temp-polling-period-ms", + &pp_tmp)) { + if (pp_tmp < DA9062_MIN_POLLING_MS_PERIOD || + pp_tmp > DA9062_MAX_POLLING_MS_PERIOD) + pp_tmp = DA9062_DEFAULT_POLLING_MS_PERIOD; + } + + dev_dbg(&pdev->dev, + "TJUNC temp polling period set at %d ms\n", + pp_tmp); + } + + thermal = devm_kzalloc(&pdev->dev, sizeof(struct da9062_thermal), + GFP_KERNEL); + if (!thermal) { + ret = -ENOMEM; + goto err; + } + + thermal->config = match->data; + thermal->hw = chip; + thermal->polling_period = pp_tmp; + thermal->mode = THERMAL_DEVICE_ENABLED; + thermal->dev = &pdev->dev; + + INIT_DELAYED_WORK(&thermal->work, da9062_thermal_poll_on); + mutex_init(&thermal->lock); + + thermal->zone = thermal_zone_device_register(thermal->config->name, + 1, 0, thermal, + &da9062_thermal_ops, NULL, 0, + 0); + if (IS_ERR(thermal->zone)) { + dev_err(&pdev->dev, "Cannot register thermal zone device\n"); + ret = PTR_ERR(thermal->zone); + goto err; + } + + ret = platform_get_irq_byname(pdev, "THERMAL"); + if (ret < 0) { + dev_err(&pdev->dev, "Failed to get platform IRQ.\n"); + goto err_zone; + } + thermal->irq = ret; + + ret = request_threaded_irq(thermal->irq, NULL, + da9062_thermal_irq_handler, + IRQF_TRIGGER_LOW | IRQF_ONESHOT, + "THERMAL", thermal); + if (ret) { + dev_err(&pdev->dev, + "Failed to request thermal device IRQ.\n"); + goto err_zone; + } + + platform_set_drvdata(pdev, thermal); + return 0; + +err_zone: + thermal_zone_device_unregister(thermal->zone); +err: + return ret; +} + +static int da9062_thermal_remove(struct platform_device *pdev) +{ + struct da9062_thermal *thermal = platform_get_drvdata(pdev); + + free_irq(thermal->irq, thermal); + thermal_zone_device_unregister(thermal->zone); + cancel_delayed_work_sync(&thermal->work); + return 0; +} + +static struct platform_driver da9062_thermal_driver = { + .probe = da9062_thermal_probe, + .remove = da9062_thermal_remove, + .driver = { + .name = "da9062-thermal", + .of_match_table = da9062_compatible_reg_id_table, + }, +}; + +module_platform_driver(da9062_thermal_driver); + +MODULE_AUTHOR("Steve Twiss"); +MODULE_DESCRIPTION("Thermal TJUNC device driver for Dialog DA9062 and DA9061"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:da9062-thermal"); -- end-of-patch for PATCH V3