From patchwork Tue Apr 6 18:28:52 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Puranjay Mohan X-Patchwork-Id: 12185705 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id AE393C43462 for ; Tue, 6 Apr 2021 18:29:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 8D86B613E1 for ; Tue, 6 Apr 2021 18:29:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S238411AbhDFS3W (ORCPT ); Tue, 6 Apr 2021 14:29:22 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39792 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S238333AbhDFS3U (ORCPT ); Tue, 6 Apr 2021 14:29:20 -0400 Received: from mail-pf1-x42f.google.com (mail-pf1-x42f.google.com [IPv6:2607:f8b0:4864:20::42f]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B9F15C06174A; Tue, 6 Apr 2021 11:29:12 -0700 (PDT) Received: by mail-pf1-x42f.google.com with SMTP id a12so11048043pfc.7; Tue, 06 Apr 2021 11:29:12 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=GIL7rCODKF/xXDJXa/SMy996Dbick98n/f2XKrRaD7U=; b=Caaj1zABlixtHGW+cg9/Fzfai9mIWGQel39ECmacW7GjFbsqXuH+4ZXxojnEwieaDL zYZy29t+GcOjD4OvzCzLEefEyjmrnAbOCp5p/tNzuBN0vejf81ho1pywPcsZGbwciGsj WWCstTxS3YlsIWWplANMqsaxzFq/exROdpLRkGrinf0ex5v4IseGOyIucWjy30FiX4N7 VjbbKZI5nibx+R3gN1YKZijlfJRLWl+6x547+ZOMSY+NgUlGrYgEBw9N5JNTsHmqXuAk zbEdOPZ0/VjZGa8x9/i6fg/2IyAeASXBaRFV6HQXD+KXhFuZiscuc5eaGafU5Uyxgxjm TNvg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=GIL7rCODKF/xXDJXa/SMy996Dbick98n/f2XKrRaD7U=; b=ZDrakz9OEUmPc69Oa70xc1PunpgFnKgC/YlnlNnWXGzbg2YJYrcoZsuwQ7lFeMWhp3 Ojad/tJeBpzyN/sGarcSdzfqOlUz7+aNYUsyxr2Qu4K32DeceJgxkCww8SY/TdQpQDCl TRo9+3LMlXxq8YBnTBa96BnFkVKEC7vpcwi3tLgbTSpZ2E1p3/agWngzSPTCde5UtcFm wtiAsAYPhq3yKZHYzRLy+TeWynnzXNX5o1COWnuqCo2sSh4bgo68w2m7pg1AOtz5P0su mXDhgm8nsTpBrJCoDq2kMVr1NTy3bDcyezyQdutaKWmplePnYKzpRjvnzs/0IS8hEN6F nyAw== X-Gm-Message-State: AOAM531vHj6+eWbRsTiDZ5tuKFvPAcUjjQ+o3/feuF0WOHy1eDlHk+LV 4pWLF+Gzip1b1nGkTl1XM6E= X-Google-Smtp-Source: ABdhPJzIuqvHcT3T4EW7OlWXJNKpGpbCCF9v+9JkoBV47e1xBym3cG4T6ZvqRuPUKtfmUqBoQR6qkg== X-Received: by 2002:a05:6a00:b89:b029:22f:dce:9fd5 with SMTP id g9-20020a056a000b89b029022f0dce9fd5mr28275846pfj.78.1617733752291; Tue, 06 Apr 2021 11:29:12 -0700 (PDT) Received: from localhost.localdomain ([124.253.94.185]) by smtp.googlemail.com with ESMTPSA id x25sm19652383pfn.81.2021.04.06.11.29.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 06 Apr 2021 11:29:11 -0700 (PDT) From: Puranjay Mohan To: alexandru.ardelean@analog.com, jic23@kernel.org, devicetree@vger.kernel.org, knaack.h@gmx.de, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, lars@metafoo.de, andy.shevchenko@gmail.com Cc: Puranjay Mohan Subject: [PATCH v3 2/2] iio: temperature: add driver support for ti tmp117 Date: Tue, 6 Apr 2021 23:58:52 +0530 Message-Id: <20210406182852.263605-3-puranjay12@gmail.com> X-Mailer: git-send-email 2.30.1 In-Reply-To: <20210406182852.263605-1-puranjay12@gmail.com> References: <20210406182852.263605-1-puranjay12@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org TMP117 is a Digital temperature sensor with integrated NV memory. Add support for tmp117 driver in iio subsystem. Datasheet: https://www.ti.com/lit/gpn/tmp117 Signed-off-by: Puranjay Mohan --- MAINTAINERS | 7 ++ drivers/iio/temperature/Kconfig | 10 ++ drivers/iio/temperature/Makefile | 1 + drivers/iio/temperature/tmp117.c | 182 +++++++++++++++++++++++++++++++ 4 files changed, 200 insertions(+) create mode 100644 drivers/iio/temperature/tmp117.c diff --git a/MAINTAINERS b/MAINTAINERS index 60ed2963e..c9b806b63 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -16666,6 +16666,13 @@ F: include/dt-bindings/soc/ti,sci_pm_domain.h F: include/linux/soc/ti/ti_sci_inta_msi.h F: include/linux/soc/ti/ti_sci_protocol.h +TEXAS INSTRUMENTS' TMP117 TEMPERATURE SENSOR DRIVER +M: Puranjay Mohan +L: linux-iio@vger.kernel.org +S: Supported +F: Documentation/devicetree/bindings/iio/temperature/ti,tmp117.yaml +F: drivers/iio/temperature/tmp117.c + THANKO'S RAREMONO AM/FM/SW RADIO RECEIVER USB DRIVER M: Hans Verkuil L: linux-media@vger.kernel.org diff --git a/drivers/iio/temperature/Kconfig b/drivers/iio/temperature/Kconfig index f1f2a1499..c5482983f 100644 --- a/drivers/iio/temperature/Kconfig +++ b/drivers/iio/temperature/Kconfig @@ -97,6 +97,16 @@ config TMP007 This driver can also be built as a module. If so, the module will be called tmp007. +config TMP117 + tristate "TMP117 Digital temperature sensor with integrated NV memory" + depends on I2C + help + If you say yes here you get support for the Texas Instruments + TMP117 Digital temperature sensor with integrated NV memory. + + This driver can also be built as a module. If so, the module will + be called tmp117. + config TSYS01 tristate "Measurement Specialties TSYS01 temperature sensor using I2C bus connection" depends on I2C diff --git a/drivers/iio/temperature/Makefile b/drivers/iio/temperature/Makefile index 90c113115..e3392c4b2 100644 --- a/drivers/iio/temperature/Makefile +++ b/drivers/iio/temperature/Makefile @@ -12,5 +12,6 @@ obj-$(CONFIG_MLX90614) += mlx90614.o obj-$(CONFIG_MLX90632) += mlx90632.o obj-$(CONFIG_TMP006) += tmp006.o obj-$(CONFIG_TMP007) += tmp007.o +obj-$(CONFIG_TMP117) += tmp117.o obj-$(CONFIG_TSYS01) += tsys01.o obj-$(CONFIG_TSYS02D) += tsys02d.o diff --git a/drivers/iio/temperature/tmp117.c b/drivers/iio/temperature/tmp117.c new file mode 100644 index 000000000..c3ff2913b --- /dev/null +++ b/drivers/iio/temperature/tmp117.c @@ -0,0 +1,182 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Digital temperature sensor with integrated NV memory + * Copyright (c) 2021 Puranjay Mohan + * + * Driver for the Texas Instruments TMP117 Temperature Sensor + * (7-bit I2C slave address (0x48 - 0x4B), changeable via ADD pins) + * + * Note: This driver assumes that the sensor has been calibrated beforehand. + */ + +#include +#include +#include +#include +#include +#include + +#include + +#define TMP117_REG_TEMP 0x0 +#define TMP117_REG_CFGR 0x1 +#define TMP117_REG_HIGH_LIM 0x2 +#define TMP117_REG_LOW_LIM 0x3 +#define TMP117_REG_EEPROM_UL 0x4 +#define TMP117_REG_EEPROM1 0x5 +#define TMP117_REG_EEPROM2 0x6 +#define TMP117_REG_TEMP_OFFSET 0x7 +#define TMP117_REG_EEPROM3 0x8 +#define TMP117_REG_DEVICE_ID 0xF + +#define TMP117_RESOLUTION_10UC 78125 +#define TMP117_DEVICE_ID 0x0117 +#define MICRODEGREE_PER_10MILLIDEGREE 10000 + +struct tmp117_data { + struct i2c_client *client; + s16 calibbias; +}; + +static int tmp117_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, int *val, + int *val2, long mask) +{ + struct tmp117_data *data = iio_priv(indio_dev); + s32 ret; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + ret = i2c_smbus_read_word_swapped(data->client, + TMP117_REG_TEMP); + if (ret < 0) + return ret; + *val = sign_extend32(ret, 15); + return IIO_VAL_INT; + + case IIO_CHAN_INFO_CALIBBIAS: + ret = i2c_smbus_read_word_swapped(data->client, + TMP117_REG_TEMP_OFFSET); + if (ret < 0) + return ret; + *val = sign_extend32(ret, 15); + return IIO_VAL_INT; + + case IIO_CHAN_INFO_SCALE: + /* Conversion from 10s of uC to mC + * as IIO reports temperature in mC + */ + *val = TMP117_RESOLUTION_10UC / MICRODEGREE_PER_10MILLIDEGREE; + *val2 = (TMP117_RESOLUTION_10UC % + MICRODEGREE_PER_10MILLIDEGREE) * 100; + + return IIO_VAL_INT_PLUS_MICRO; + + default: + return -EINVAL; + } +} + +static int tmp117_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *channel, int val, + int val2, long mask) +{ + struct tmp117_data *data = iio_priv(indio_dev); + s16 off; + + switch (mask) { + case IIO_CHAN_INFO_CALIBBIAS: + off = clamp(val, -32768, 32767); + if (off == data->calibbias) + return 0; + return i2c_smbus_write_word_swapped(data->client, + TMP117_REG_TEMP_OFFSET, off); + + default: + return -EINVAL; + } +} + +static const struct iio_chan_spec tmp117_channels[] = { + { + .type = IIO_TEMP, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_CALIBBIAS) | BIT(IIO_CHAN_INFO_SCALE), + }, +}; + +static const struct iio_info tmp117_info = { + .read_raw = tmp117_read_raw, + .write_raw = tmp117_write_raw, +}; + +static int tmp117_identify(struct i2c_client *client) +{ + int dev_id; + + dev_id = i2c_smbus_read_word_swapped(client, TMP117_REG_DEVICE_ID); + if (dev_id < 0) + return dev_id; + if (dev_id != TMP117_DEVICE_ID) { + dev_err(&client->dev, "TMP117 not found\n"); + return -ENODEV; + } + return 0; +} + +static int tmp117_probe(struct i2c_client *client) +{ + struct tmp117_data *data; + struct iio_dev *indio_dev; + int ret; + + if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_WORD_DATA)) + return -EOPNOTSUPP; + + ret = tmp117_identify(client); + if (ret < 0) + return ret; + + indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data)); + if (!indio_dev) + return -ENOMEM; + + data = iio_priv(indio_dev); + data->client = client; + data->calibbias = 0; + + indio_dev->name = "tmp117"; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->info = &tmp117_info; + + indio_dev->channels = tmp117_channels; + indio_dev->num_channels = ARRAY_SIZE(tmp117_channels); + + return devm_iio_device_register(&client->dev, indio_dev); +} + +static const struct of_device_id tmp117_of_match[] = { + { .compatible = "ti,tmp117", }, + { } +}; +MODULE_DEVICE_TABLE(of, tmp117_of_match); + +static const struct i2c_device_id tmp117_id[] = { + { "tmp117", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, tmp117_id); + +static struct i2c_driver tmp117_driver = { + .driver = { + .name = "tmp117", + .of_match_table = tmp117_of_match, + }, + .probe_new = tmp117_probe, + .id_table = tmp117_id, +}; +module_i2c_driver(tmp117_driver); + +MODULE_AUTHOR("Puranjay Mohan "); +MODULE_DESCRIPTION("TI TMP117 Temperature sensor driver"); +MODULE_LICENSE("GPL");