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[2620:137:e000::1:20]) by mx.google.com with ESMTP id k1-20020a056402048100b004ad6fc891ddsi15952061edv.505.2023.02.21.02.50.49; Tue, 21 Feb 2023 02:51:11 -0800 (PST) Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) client-ip=2620:137:e000::1:20; Authentication-Results: mx.google.com; spf=pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 2620:137:e000::1:20 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=fail (p=NONE sp=NONE dis=NONE) header.from=analog.com Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S233739AbjBUKmJ (ORCPT + 99 others); Tue, 21 Feb 2023 05:42:09 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:42358 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S233780AbjBUKmF (ORCPT ); Tue, 21 Feb 2023 05:42:05 -0500 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 642DB23C51; Tue, 21 Feb 2023 02:41:51 -0800 (PST) Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.17.1.19/8.17.1.19) with ESMTP id 31L8fZrx018026; Tue, 21 Feb 2023 05:41:30 -0500 Received: from pps.reinject (localhost [127.0.0.1]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3nvdcm4mvf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Feb 2023 05:41:29 -0500 Received: from m0167088.ppops.net (m0167088.ppops.net [127.0.0.1]) by pps.reinject (8.17.1.5/8.17.1.5) with ESMTP id 31LAd0Cc028350; Tue, 21 Feb 2023 05:41:29 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3nvdcm4mv8-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 21 Feb 2023 05:41:29 -0500 Received: from ASHBMBX8.ad.analog.com (ASHBMBX8.ad.analog.com [10.64.17.5]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 31LAfRia023096 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Tue, 21 Feb 2023 05:41:27 -0500 Received: from ASHBCASHYB5.ad.analog.com (10.64.17.133) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Tue, 21 Feb 2023 05:41:27 -0500 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBCASHYB5.ad.analog.com (10.64.17.133) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Tue, 21 Feb 2023 05:41:26 -0500 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Tue, 21 Feb 2023 05:41:26 -0500 Received: from okan.localdomain (IST-LT-43126.ad.analog.com [10.25.36.24]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 31LAdbGx012847; Tue, 21 Feb 2023 05:41:14 -0500 From: Okan Sahin To: CC: Jonathan Cameron , Lee Jones , Rob Herring , Krzysztof Kozlowski , Liam Girdwood , Mark Brown , Jonathan Cameron , Lars-Peter Clausen , Andy Shevchenko , Caleb Connolly , William Breathitt Gray , Geert Uytterhoeven , ChiYuan Huang , Lad Prabhakar , Ramona Bolboaca , , , Subject: [PATCH v5 3/5] iio: adc: max77541: Add ADI MAX77541 ADC Support Date: Tue, 21 Feb 2023 13:39:11 +0300 Message-ID: <20230221103926.49597-4-okan.sahin@analog.com> X-Mailer: git-send-email 2.30.2 In-Reply-To: <20230221103926.49597-1-okan.sahin@analog.com> References: <20230221103926.49597-1-okan.sahin@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: 66YZjPVRV2ob86y0Soi81mhF-j_BFprZ X-Proofpoint-ORIG-GUID: MRk0J4PSP1w_3uTxfXAhZpFC8Yi-Jq4G X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.219,Aquarius:18.0.930,Hydra:6.0.562,FMLib:17.11.170.22 definitions=2023-02-21_06,2023-02-20_02,2023-02-09_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 priorityscore=1501 suspectscore=0 adultscore=0 bulkscore=0 mlxlogscore=999 spamscore=0 phishscore=0 impostorscore=0 mlxscore=0 malwarescore=0 clxscore=1011 lowpriorityscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2212070000 definitions=main-2302210092 X-Spam-Status: No, score=-2.6 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_LOW, RCVD_IN_MSPIKE_H2,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on lindbergh.monkeyblade.net Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org X-getmail-retrieved-from-mailbox: =?utf-8?q?INBOX?= X-GMAIL-THRID: =?utf-8?q?1758437490608156591?= X-GMAIL-MSGID: =?utf-8?q?1758437490608156591?= The MAX77541 has an 8-bit Successive Approximation Register (SAR) ADC with four multiplexers for supporting the telemetry feature. Signed-off-by: Okan Sahin Reviewed-by: Jonathan Cameron --- drivers/iio/adc/Kconfig | 11 ++ drivers/iio/adc/Makefile | 1 + drivers/iio/adc/max77541-adc.c | 195 +++++++++++++++++++++++++++++++++ 3 files changed, 207 insertions(+) create mode 100644 drivers/iio/adc/max77541-adc.c diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 791612ca6012..9716225b50da 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -696,6 +696,17 @@ config MAX1363 To compile this driver as a module, choose M here: the module will be called max1363. +config MAX77541_ADC + tristate "Analog Devices MAX77541 ADC driver" + depends on MFD_MAX77541 + help + This driver controls a Analog Devices MAX77541 ADC + via I2C bus. This device has one adc. Say yes here to build + support for Analog Devices MAX77541 ADC interface. + + To compile this driver as a module, choose M here: + the module will be called max77541-adc. + config MAX9611 tristate "Maxim max9611/max9612 ADC driver" depends on I2C diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 46caba7a010c..03774cccbb4b 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -64,6 +64,7 @@ obj-$(CONFIG_MAX1118) += max1118.o obj-$(CONFIG_MAX11205) += max11205.o obj-$(CONFIG_MAX1241) += max1241.o obj-$(CONFIG_MAX1363) += max1363.o +obj-$(CONFIG_MAX77541_ADC) += max77541-adc.o obj-$(CONFIG_MAX9611) += max9611.o obj-$(CONFIG_MCP320X) += mcp320x.o obj-$(CONFIG_MCP3422) += mcp3422.o diff --git a/drivers/iio/adc/max77541-adc.c b/drivers/iio/adc/max77541-adc.c new file mode 100644 index 000000000000..d7805793f5e3 --- /dev/null +++ b/drivers/iio/adc/max77541-adc.c @@ -0,0 +1,195 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/* + * Copyright (c) 2022 Analog Devices, Inc. + * ADI MAX77541 ADC Driver with IIO interface + */ + +#include +#include +#include +#include +#include +#include +#include + +#include + +enum max77541_adc_range { + LOW_RANGE, + MID_RANGE, + HIGH_RANGE, +}; + +enum max77541_adc_channel { + MAX77541_ADC_VSYS_V, + MAX77541_ADC_VOUT1_V, + MAX77541_ADC_VOUT2_V, + MAX77541_ADC_TEMP, +}; + +static int max77541_adc_offset(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2) +{ + switch (chan->channel) { + case MAX77541_ADC_TEMP: + *val = DIV_ROUND_CLOSEST(ABSOLUTE_ZERO_MILLICELSIUS, 1725); + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static int max77541_adc_scale(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2) +{ + struct regmap **regmap = iio_priv(indio_dev); + unsigned int reg_val; + int ret; + + switch (chan->channel) { + case MAX77541_ADC_VSYS_V: + *val = 25; + return IIO_VAL_INT; + case MAX77541_ADC_VOUT1_V: + case MAX77541_ADC_VOUT2_V: + ret = regmap_read(*regmap, MAX77541_REG_M2_CFG1, ®_val); + if (ret) + return ret; + + reg_val = FIELD_GET(MAX77541_BITS_MX_CFG1_RNG, reg_val); + switch (reg_val) { + case LOW_RANGE: + *val = 6; + *val2 = 250000; + break; + case MID_RANGE: + *val = 12; + *val2 = 500000; + break; + case HIGH_RANGE: + *val = 25; + return IIO_VAL_INT; + default: + return -EINVAL; + } + + return IIO_VAL_INT_PLUS_MICRO; + case MAX77541_ADC_TEMP: + *val = 1725; + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static int max77541_adc_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val) +{ + struct regmap **regmap = iio_priv(indio_dev); + int ret; + + ret = regmap_read(*regmap, chan->address, val); + if (ret) + return ret; + + return IIO_VAL_INT; +} + +#define MAX77541_ADC_CHANNEL_V(_channel, _name, _type, _reg) \ + { \ + .type = _type, \ + .indexed = 1, \ + .channel = _channel, \ + .address = _reg, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE), \ + .datasheet_name = _name, \ + } + +#define MAX77541_ADC_CHANNEL_TEMP(_channel, _name, _type, _reg) \ + { \ + .type = _type, \ + .indexed = 1, \ + .channel = _channel, \ + .address = _reg, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \ + BIT(IIO_CHAN_INFO_SCALE) |\ + BIT(IIO_CHAN_INFO_OFFSET),\ + .datasheet_name = _name, \ + } + +static const struct iio_chan_spec max77541_adc_channels[] = { + MAX77541_ADC_CHANNEL_V(MAX77541_ADC_VSYS_V, "vsys_v", IIO_VOLTAGE, + MAX77541_REG_ADC_DATA_CH1), + MAX77541_ADC_CHANNEL_V(MAX77541_ADC_VOUT1_V, "vout1_v", IIO_VOLTAGE, + MAX77541_REG_ADC_DATA_CH2), + MAX77541_ADC_CHANNEL_V(MAX77541_ADC_VOUT2_V, "vout2_v", IIO_VOLTAGE, + MAX77541_REG_ADC_DATA_CH3), + MAX77541_ADC_CHANNEL_TEMP(MAX77541_ADC_TEMP, "temp", IIO_TEMP, + MAX77541_REG_ADC_DATA_CH6), +}; + +static int max77541_adc_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_OFFSET: + return max77541_adc_offset(indio_dev, chan, val, val2); + case IIO_CHAN_INFO_SCALE: + return max77541_adc_scale(indio_dev, chan, val, val2); + case IIO_CHAN_INFO_RAW: + return max77541_adc_raw(indio_dev, chan, val); + default: + return -EINVAL; + } +} + +static const struct iio_info max77541_adc_info = { + .read_raw = max77541_adc_read_raw, +}; + +static int max77541_adc_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct iio_dev *indio_dev; + struct regmap **regmap; + + indio_dev = devm_iio_device_alloc(dev, sizeof(*regmap)); + if (!indio_dev) + return -ENOMEM; + + regmap = iio_priv(indio_dev); + + *regmap = dev_get_regmap(dev->parent, NULL); + indio_dev->modes = INDIO_DIRECT_MODE; + + indio_dev->name = "max77541"; + indio_dev->info = &max77541_adc_info; + indio_dev->channels = max77541_adc_channels; + indio_dev->num_channels = ARRAY_SIZE(max77541_adc_channels); + + return devm_iio_device_register(dev, indio_dev); +} + +static const struct platform_device_id max77541_adc_platform_id[] = { + { "max77541-adc" }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(platform, max77541_adc_platform_id); + +static struct platform_driver max77541_adc_driver = { + .driver = { + .name = "max77541-adc", + }, + .probe = max77541_adc_probe, + .id_table = max77541_adc_platform_id, +}; +module_platform_driver(max77541_adc_driver); + +MODULE_AUTHOR("Okan Sahin "); +MODULE_DESCRIPTION("MAX77541 ADC driver"); +MODULE_LICENSE("GPL");