From patchwork Mon Oct 21 04:11:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Jeff LaBundy X-Patchwork-Id: 11201279 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id EE02E1920 for ; Mon, 21 Oct 2019 04:19:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id D67742053B for ; Mon, 21 Oct 2019 04:19:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726994AbfJUETS (ORCPT ); Mon, 21 Oct 2019 00:19:18 -0400 Received: from p3plsmtpa06-04.prod.phx3.secureserver.net ([173.201.192.105]:33777 "EHLO p3plsmtpa06-04.prod.phx3.secureserver.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727034AbfJUETR (ORCPT ); Mon, 21 Oct 2019 00:19:17 -0400 Received: from localhost.localdomain ([136.49.227.119]) by :SMTPAUTH: with ESMTPSA id MP2oifB4Hr3FgMP2xiDyZ4; Sun, 20 Oct 2019 21:11:59 -0700 From: Jeff LaBundy To: lee.jones@linaro.org, dmitry.torokhov@gmail.com, jdelvare@suse.com, linux@roeck-us.net, thierry.reding@gmail.com, jic23@kernel.org, devicetree@vger.kernel.org Cc: linux-input@vger.kernel.org, linux-hwmon@vger.kernel.org, u.kleine-koenig@pengutronix.de, linux-pwm@vger.kernel.org, knaack.h@gmx.de, lars@metafoo.de, pmeerw@pmeerw.net, linux-iio@vger.kernel.org, robh+dt@kernel.org, mark.rutland@arm.com, Jeff LaBundy Subject: [PATCH 4/8] hwmon: Add support for Azoteq IQS620AT temperature sensor Date: Sun, 20 Oct 2019 23:11:19 -0500 Message-Id: <1571631083-4962-5-git-send-email-jeff@labundy.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1571631083-4962-1-git-send-email-jeff@labundy.com> References: <1571631083-4962-1-git-send-email-jeff@labundy.com> X-CMAE-Envelope: MS4wfCTkk/bvHPNeSN2+Q+jpjtr2J/0Ob93zwQWi+DTPZgwKCpLlK69iByoBdRDSs5xHJnke3tH9pqvEGLI687VXIo7aSQUfMvNm/Xod0m0GRk2sndpDSbuJ cmnM8rLkjgczHq3LIsYZ92SBmpXxiOfPML+jfsHBqp+JYgjS01hJGpi8dus/a0T7UOupRPLaExTouw3YORAzu55EMbsfARZ61xDrai9LgbDSHPpvPMBNPDK1 wMtjXSHOMVz+Xhq+HNMHtvjJ1O2v2oeLm9u6DxMCf5+sc8nWzLF5X/nsi9/GplypmlLWOcQPwPg4g9QuNNYLxHXPU8b2PzilQXpNOtzozS5uGh3gAychES72 HYVMfe4TOnkhhWYFY0ciupauqA5ueoeJEBJ4C1ZlvvvCMadtCtJHVv0i9551dJc81m8CVudIk4M1DoBd/6eS6mTwkMTADV+FxxPwDQn9+NZo4kW1ZsrzF25Z wEocQGo+9cYQ5bJXWLXUlT5emrs1+Ox17/XC9az77LTUwlJdHNzDEFFkon065RTzQ7qJAIZTEnipXOntQ0Y047F2IjMo10RFJiqSkqHqDMv9IwKXLjfWtjVS L4hrzXQ0KqCF3CIj3f/j2Ur4vFdBDbShAqxB3IKSBnwyxL6ci5ATSCqisXCStaB7eLxX/ccaakrvuoJG0lL0GWROKBtrmseLMK1wXn6LgHupMf7JdB/EVJT8 AaN7pvwfD0TH3Sgp2pwFavCoXh3X74t2NiJlfmPA5NSx8P8pKLYRfQ== Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This patch adds support for the Azoteq IQS620AT temperature sensor, capable of reporting its absolute die temperature. Signed-off-by: Jeff LaBundy --- drivers/hwmon/Kconfig | 12 +++++- drivers/hwmon/Makefile | 1 + drivers/hwmon/iqs620at-temp.c | 96 +++++++++++++++++++++++++++++++++++++++++++ 3 files changed, 108 insertions(+), 1 deletion(-) create mode 100644 drivers/hwmon/iqs620at-temp.c diff --git a/drivers/hwmon/Kconfig b/drivers/hwmon/Kconfig index 13a6b4a..3e56be6 100644 --- a/drivers/hwmon/Kconfig +++ b/drivers/hwmon/Kconfig @@ -385,6 +385,16 @@ config SENSORS_ATXP1 This driver can also be built as a module. If so, the module will be called atxp1. +config SENSORS_IQS620AT + tristate "Azoteq IQS620AT temperature sensor" + depends on MFD_IQS62X + help + Say Y here if you want to build support for the Azoteq IQS620AT + temperature sensor. + + To compile this driver as a module, choose M here: the module + will be called iqs620at-temp. + config SENSORS_DS620 tristate "Dallas Semiconductor DS620" depends on I2C @@ -1593,7 +1603,7 @@ config SENSORS_ADS7871 config SENSORS_AMC6821 tristate "Texas Instruments AMC6821" - depends on I2C + depends on I2C help If you say yes here you get support for the Texas Instruments AMC6821 hardware monitoring chips. diff --git a/drivers/hwmon/Makefile b/drivers/hwmon/Makefile index 40c036e..2360add 100644 --- a/drivers/hwmon/Makefile +++ b/drivers/hwmon/Makefile @@ -83,6 +83,7 @@ obj-$(CONFIG_SENSORS_IIO_HWMON) += iio_hwmon.o obj-$(CONFIG_SENSORS_INA209) += ina209.o obj-$(CONFIG_SENSORS_INA2XX) += ina2xx.o obj-$(CONFIG_SENSORS_INA3221) += ina3221.o +obj-$(CONFIG_SENSORS_IQS620AT) += iqs620at-temp.o obj-$(CONFIG_SENSORS_IT87) += it87.o obj-$(CONFIG_SENSORS_JC42) += jc42.o obj-$(CONFIG_SENSORS_K8TEMP) += k8temp.o diff --git a/drivers/hwmon/iqs620at-temp.c b/drivers/hwmon/iqs620at-temp.c new file mode 100644 index 0000000..0af49b6 --- /dev/null +++ b/drivers/hwmon/iqs620at-temp.c @@ -0,0 +1,96 @@ +// SPDX-License-Identifier: GPL-2.0+ +/* + * Azoteq IQS620AT Temperature Sensor + * + * Copyright (C) 2019 + * Author: Jeff LaBundy + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#define IQS620_TEMP_UI_OUT 0x1A + +static umode_t iqs620_temp_is_visible(const void *drvdata, + enum hwmon_sensor_types type, + u32 attr, int channel) +{ + if (type != hwmon_temp || attr != hwmon_temp_input) + return 0; + + return 0444; +} + +static int iqs620_temp_read(struct device *dev, enum hwmon_sensor_types type, + u32 attr, int channel, long *val) +{ + struct iqs62x_core *iqs62x = dev_get_drvdata(dev); + int error; + __le16 val_buf; + + if (type != hwmon_temp || attr != hwmon_temp_input) + return -EINVAL; + + error = regmap_raw_read(iqs62x->map, IQS620_TEMP_UI_OUT, &val_buf, + sizeof(val_buf)); + if (error) + return error; + + *val = (le16_to_cpu(val_buf) - 100) * 1000; + + return 0; +} + +static const struct hwmon_ops iqs620_temp_ops = { + .is_visible = iqs620_temp_is_visible, + .read = iqs620_temp_read, +}; + +static const struct hwmon_channel_info *iqs620_temp_channel_info[] = { + HWMON_CHANNEL_INFO(chip, HWMON_C_REGISTER_TZ), + HWMON_CHANNEL_INFO(temp, HWMON_T_INPUT), + NULL +}; + +static const struct hwmon_chip_info iqs620_temp_chip_info = { + .ops = &iqs620_temp_ops, + .info = iqs620_temp_channel_info, +}; + +static int iqs620_temp_probe(struct platform_device *pdev) +{ + struct iqs62x_core *iqs62x = dev_get_drvdata(pdev->dev.parent); + struct device *hdev; + int error = 0; + + hdev = devm_hwmon_device_register_with_info(&pdev->dev, + iqs62x->dev_desc->dev_name, + iqs62x, + &iqs620_temp_chip_info, + NULL); + if (IS_ERR(hdev)) { + error = PTR_ERR(hdev); + dev_err(&pdev->dev, "Failed to register device: %d\n", error); + } + + return error; +} + +static struct platform_driver iqs620_temp_platform_driver = { + .driver = { + .name = IQS620_DRV_NAME_TEMP, + }, + .probe = iqs620_temp_probe, +}; +module_platform_driver(iqs620_temp_platform_driver); + +MODULE_AUTHOR("Jeff LaBundy "); +MODULE_DESCRIPTION("Azoteq IQS620AT Temperature Sensor"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:" IQS620_DRV_NAME_TEMP);