From patchwork Wed Sep 16 06:23:15 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Rajendra Nayak X-Patchwork-Id: 7191181 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 61E48BEEC1 for ; Wed, 16 Sep 2015 06:29:40 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 1998420875 for ; Wed, 16 Sep 2015 06:29:39 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id A86BD2086E for ; Wed, 16 Sep 2015 06:29:37 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zc69r-0004do-3U; Wed, 16 Sep 2015 06:25:31 +0000 Received: from smtp.codeaurora.org ([198.145.29.96]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zc69n-0004aX-WB for linux-arm-kernel@lists.infradead.org; Wed, 16 Sep 2015 06:25:29 +0000 Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 26AEF1408E3; Wed, 16 Sep 2015 06:25:10 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 486) id 15D891408EA; Wed, 16 Sep 2015 06:25:09 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from blr-ubuntu-34.ap.qualcomm.com (unknown [202.46.23.61]) (using TLSv1.1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) (Authenticated sender: rnayak@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 9025D1408E3; Wed, 16 Sep 2015 06:25:02 +0000 (UTC) From: Rajendra Nayak To: linux-arm-msm@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org, rui.zhang@intel.com, edubezval@gmail.com Subject: [PATCH v2 1/9] thermal: qcom: tsens: Add a skeletal TSENS drivers Date: Wed, 16 Sep 2015 11:53:15 +0530 Message-Id: <1442384603-26053-2-git-send-email-rnayak@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1442384603-26053-1-git-send-email-rnayak@codeaurora.org> References: <1442384603-26053-1-git-send-email-rnayak@codeaurora.org> X-Virus-Scanned: ClamAV using ClamSMTP X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150915_232528_102240_7FFB2626 X-CRM114-Status: GOOD ( 29.59 ) X-Spam-Score: -2.6 (--) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: srinivas.kandagatla@linaro.org, Rajendra Nayak , sboyd@codeaurora.org, lina.iyer@linaro.org, nrajan@codeaurora.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP TSENS is Qualcomms' thermal temperature sensor device. It supports reading temperatures from multiple thermal sensors present on various QCOM SoCs. Calibration data is generally read from a non-volatile memory (eeprom) device. Add a skeleton driver with all the necessary abstractions so a variety of qcom device families which support TSENS can add driver extensions. Also add the required device tree bindings which can be used to describe the TSENS device in DT. Signed-off-by: Rajendra Nayak Reviewed-by: Lina Iyer --- .../devicetree/bindings/thermal/qcom-tsens.txt | 36 ++++ drivers/thermal/Kconfig | 5 + drivers/thermal/Makefile | 1 + drivers/thermal/qcom/Kconfig | 10 + drivers/thermal/qcom/Makefile | 2 + drivers/thermal/qcom/tsens.c | 208 +++++++++++++++++++++ drivers/thermal/qcom/tsens.h | 58 ++++++ 7 files changed, 320 insertions(+) create mode 100644 Documentation/devicetree/bindings/thermal/qcom-tsens.txt create mode 100644 drivers/thermal/qcom/Kconfig create mode 100644 drivers/thermal/qcom/Makefile create mode 100644 drivers/thermal/qcom/tsens.c create mode 100644 drivers/thermal/qcom/tsens.h diff --git a/Documentation/devicetree/bindings/thermal/qcom-tsens.txt b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt new file mode 100644 index 0000000..3d54d37 --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/qcom-tsens.txt @@ -0,0 +1,36 @@ +* QCOM SoC Temperature Sensor (TSENS) + +Required properties: +- compatible : + - "qcom,msm8916-tsens" : For 8916 Family of SoCs + - "qcom,msm8974-tsens" : For 8974 Family of SoCs + +- reg: Address range of the thermal registers +- qcom,tsens-slopes : Must contain slope value for each of the sensors controlled + by this device +- #thermal-sensor-cells : Should be 1. See ./thermal.txt for a description. +- Refer to Documentation/devicetree/bindings/nvmem/nvmem.txt to know how to specify +nvmem cells + +Optional properties: +- qcom,sensor-id: List of sensor instances used in a given SoC. A TSENS IP can + have a fixed number of sensors (like 11) but a given SoC can + use only 5 of these and they might not always the first 5. They + could be sensors 0, 1, 4, 8 and 9. This property is used to + describe the subset of the sensors used. If this property is + missing they are assumed to be the first 'n' sensors numbered + sequentially in which case the number of sensors defaults to + the number of slope values. + +Example: +tsens: thermal-sensor@900000 { + compatible = "qcom,msm8916-tsens"; + qcom,tsens-slopes = <1176 1176 1154 1176 1111 + 1132 1132 1199 1132 1199 + 1132>; + nvmem-cells = <&tsens_caldata>, <&tsens_calsel>; + nvmem-cell-names = "caldata", "calsel"; + qcom,tsens-slopes = <3200 3200 3200 3200 3200>; + qcom,sensor-id = <0 1 2 4 5>; + #thermal-sensor-cells = <1>; + }; diff --git a/drivers/thermal/Kconfig b/drivers/thermal/Kconfig index 0390044..59ac3d8 100644 --- a/drivers/thermal/Kconfig +++ b/drivers/thermal/Kconfig @@ -373,4 +373,9 @@ config QCOM_SPMI_TEMP_ALARM real time die temperature if an ADC is present or an estimate of the temperature based upon the over temperature stage value. +menu "Qualcomm thermal drivers" +depends on ARCH_QCOM && OF +source "drivers/thermal/qcom/Kconfig" +endmenu + endif diff --git a/drivers/thermal/Makefile b/drivers/thermal/Makefile index 26f1608..cdaa55f 100644 --- a/drivers/thermal/Makefile +++ b/drivers/thermal/Makefile @@ -43,5 +43,6 @@ obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal/ obj-$(CONFIG_INT340X_THERMAL) += int340x_thermal/ obj-$(CONFIG_INTEL_PCH_THERMAL) += intel_pch_thermal.o obj-$(CONFIG_ST_THERMAL) += st/ +obj-$(CONFIG_QCOM_TSENS) += qcom/ obj-$(CONFIG_TEGRA_SOCTHERM) += tegra_soctherm.o obj-$(CONFIG_HISI_THERMAL) += hisi_thermal.o diff --git a/drivers/thermal/qcom/Kconfig b/drivers/thermal/qcom/Kconfig new file mode 100644 index 0000000..f7e8e40 --- /dev/null +++ b/drivers/thermal/qcom/Kconfig @@ -0,0 +1,10 @@ +config QCOM_TSENS + tristate "Qualcomm TSENS Temperature Alarm" + depends on THERMAL + depends on QCOM_QFPROM + help + This enables the thermal sysfs driver for the TSENS device. It shows + up in Sysfs as a thermal zone with multiple trip points. Disabling the + thermal zone device via the mode file results in disabling the sensor. + Also able to set threshold temperature for both hot and cold and update + when a threshold is reached. diff --git a/drivers/thermal/qcom/Makefile b/drivers/thermal/qcom/Makefile new file mode 100644 index 0000000..401069b --- /dev/null +++ b/drivers/thermal/qcom/Makefile @@ -0,0 +1,2 @@ +obj-$(CONFIG_QCOM_TSENS) += qcom_tsens.o +qcom_tsens-y += tsens.o diff --git a/drivers/thermal/qcom/tsens.c b/drivers/thermal/qcom/tsens.c new file mode 100644 index 0000000..9615845 --- /dev/null +++ b/drivers/thermal/qcom/tsens.c @@ -0,0 +1,208 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 and + * only version 2 as published by the Free Software Foundation. + * + * 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 "tsens.h" + +static int tsens_get_temp(void *data, int *temp) +{ + const struct tsens_sensor *s = data; + struct tsens_device *tmdev = s->tmdev; + + return tmdev->ops->get_temp(tmdev, s->id, temp); +} + +static int tsens_get_trend(void *data, long *temp) +{ + const struct tsens_sensor *s = data; + struct tsens_device *tmdev = s->tmdev; + + if (tmdev->ops->get_trend) + return tmdev->ops->get_trend(tmdev, s->id, temp); + + return -ENOSYS; +} + +#ifdef CONFIG_PM +static int tsens_suspend(struct device *dev) +{ + struct tsens_device *tmdev = dev_get_drvdata(dev); + + if (tmdev->ops && tmdev->ops->suspend) + return tmdev->ops->suspend(tmdev); + + return 0; +} + +static int tsens_resume(struct device *dev) +{ + struct tsens_device *tmdev = dev_get_drvdata(dev); + + if (tmdev->ops && tmdev->ops->resume) + return tmdev->ops->resume(tmdev); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(tsens_pm_ops, tsens_suspend, tsens_resume); +#define TSENS_PM_OPS (&tsens_pm_ops) + +#else /* CONFIG_PM_SLEEP */ +#define TSENS_PM_OPS NULL +#endif /* CONFIG_PM_SLEEP */ + +static const struct of_device_id tsens_table[] = { + { + .compatible = "qcom,msm8916-tsens", + }, { + .compatible = "qcom,msm8974-tsens", + }, + {} +}; +MODULE_DEVICE_TABLE(of, tsens_table); + +static const struct thermal_zone_of_device_ops tsens_of_ops = { + .get_temp = tsens_get_temp, + .get_trend = tsens_get_trend, +}; + +static int tsens_register(struct tsens_device *tmdev) +{ + int i, ret; + struct thermal_zone_device *tzd; + u32 *hw_id, n = tmdev->num_sensors; + struct device_node *np = tmdev->dev->of_node; + + hw_id = devm_kcalloc(tmdev->dev, n, sizeof(u32), GFP_KERNEL); + if (!hw_id) + return -ENOMEM; + + ret = of_property_read_u32_array(np, "qcom,sensor-id", hw_id, n); + if (ret) + for (i = 0; i < tmdev->num_sensors; i++) + tmdev->sensor[i].hw_id = i; + else + for (i = 0; i < tmdev->num_sensors; i++) + tmdev->sensor[i].hw_id = hw_id[i]; + + for (i = 0; i < tmdev->num_sensors; i++) { + tmdev->sensor[i].tmdev = tmdev; + tmdev->sensor[i].id = i; + tzd = thermal_zone_of_sensor_register(tmdev->dev, i, + &tmdev->sensor[i], + &tsens_of_ops); + if (IS_ERR(tzd)) + continue; + tmdev->sensor[i].tzd = tzd; + if (tmdev->ops->enable) + tmdev->ops->enable(tmdev, i); + } + return 0; +} + +static int tsens_probe(struct platform_device *pdev) +{ + int ret, i, num; + struct device *dev; + struct device_node *np; + struct tsens_sensor *s; + struct tsens_device *tmdev; + const struct of_device_id *id; + + dev = &pdev->dev; + np = dev->of_node; + + num = of_property_count_u32_elems(np, "qcom,tsens-slopes"); + if (num <= 0) { + dev_err(dev, "invalid tsens slopes\n"); + return -EINVAL; + } + + tmdev = devm_kzalloc(dev, sizeof(*tmdev) + + num * sizeof(*s), GFP_KERNEL); + if (!tmdev) + return -ENOMEM; + + tmdev->dev = dev; + tmdev->num_sensors = num; + + for (i = 0, s = tmdev->sensor; i < tmdev->num_sensors; i++, s++) + of_property_read_u32_index(np, "qcom,tsens-slopes", i, + &s->slope); + + id = of_match_node(tsens_table, np); + if (!id) + return -ENODEV; + + tmdev->ops = id->data; + if (!tmdev->ops || !tmdev->ops->init || !tmdev->ops->calibrate || + !tmdev->ops->get_temp) + return -EINVAL; + + ret = tmdev->ops->init(tmdev); + if (ret < 0) { + dev_err(dev, "tsens init failed\n"); + return ret; + } + + ret = tmdev->ops->calibrate(tmdev); + if (ret < 0) { + dev_err(dev, "tsens calibration failed\n"); + return ret; + } + + ret = tsens_register(tmdev); + + platform_set_drvdata(pdev, tmdev); + + return ret; +} + +static int tsens_remove(struct platform_device *pdev) +{ + int i; + struct tsens_device *tmdev = platform_get_drvdata(pdev); + struct thermal_zone_device *tzd; + + if (tmdev->ops->disable) + tmdev->ops->disable(tmdev); + + for (i = 0; i < tmdev->num_sensors; i++) { + tzd = tmdev->sensor[i].tzd; + thermal_zone_of_sensor_unregister(&pdev->dev, tzd); + } + + return 0; +} + +static struct platform_driver tsens_driver = { + .probe = tsens_probe, + .remove = tsens_remove, + .driver = { + .name = "qcom-tsens", + .pm = TSENS_PM_OPS, + .of_match_table = tsens_table, + }, +}; +module_platform_driver(tsens_driver); + +MODULE_LICENSE("GPL v2"); +MODULE_DESCRIPTION("QCOM Temperature Sensor driver"); +MODULE_ALIAS("platform:qcom-tsens"); diff --git a/drivers/thermal/qcom/tsens.h b/drivers/thermal/qcom/tsens.h new file mode 100644 index 0000000..f0fc353 --- /dev/null +++ b/drivers/thermal/qcom/tsens.h @@ -0,0 +1,58 @@ +/* + * Copyright (c) 2015, The Linux Foundation. All rights reserved. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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. + */ +#ifndef __QCOM_TSENS_H__ +#define __QCOM_TSENS_H__ + +struct tsens_device; + +struct tsens_sensor { + struct tsens_device *tmdev; + struct thermal_zone_device *tzd; + int offset; + int id; + int hw_id; + u32 slope; + u32 status; +}; + +struct tsens_ops { + /* mandatory callbacks */ + int (*init)(struct tsens_device *); + int (*calibrate)(struct tsens_device *); + int (*get_temp)(struct tsens_device *, int, int *); + /* optional callbacks */ + int (*enable)(struct tsens_device *, int); + void (*disable)(struct tsens_device *); + int (*suspend)(struct tsens_device *); + int (*resume)(struct tsens_device *); + int (*get_trend)(struct tsens_device *, int, long *); +}; + +/* Registers to be saved/restored across a context loss */ +struct tsens_context { + int threshold; + int control; +}; + +struct tsens_device { + struct device *dev; + u32 num_sensors; + struct regmap *map; + struct regmap_field *status_field; + struct tsens_context ctx; + bool trdy; + const struct tsens_ops *ops; + struct tsens_sensor sensor[0]; +}; + +#endif /* __QCOM_TSENS_H__ */