From patchwork Wed Aug 24 12:52:02 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramona Bolboaca X-Patchwork-Id: 12953498 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id A31C8C00140 for ; Wed, 24 Aug 2022 12:55:09 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237452AbiHXMzE (ORCPT ); Wed, 24 Aug 2022 08:55:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56194 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237404AbiHXMzE (ORCPT ); Wed, 24 Aug 2022 08:55:04 -0400 Received: from mx0a-00128a01.pphosted.com (mx0a-00128a01.pphosted.com [148.163.135.77]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BA8616DF96; Wed, 24 Aug 2022 05:55:02 -0700 (PDT) Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.17.1.5/8.17.1.5) with ESMTP id 27OCiL9m012738; Wed, 24 Aug 2022 08:54:54 -0400 Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com (PPS) with ESMTPS id 3j5ad43vxx-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 24 Aug 2022 08:54:54 -0400 Received: from ASHBMBX9.ad.analog.com (ASHBMBX9.ad.analog.com [10.64.17.10]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 27OCsrNj040110 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=FAIL); Wed, 24 Aug 2022 08:54:53 -0400 Received: from ASHBCASHYB5.ad.analog.com (10.64.17.133) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Wed, 24 Aug 2022 08:54:52 -0400 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; Wed, 24 Aug 2022 08:54:52 -0400 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; Wed, 24 Aug 2022 08:54:52 -0400 Received: from rbolboac.ad.analog.com ([10.48.65.109]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 27OCseSU004251; Wed, 24 Aug 2022 08:54:46 -0400 From: Ramona Bolboaca To: , , , , , CC: Ramona Bolboaca Subject: [PATCH 1/2] bindings: iio: adc: Add max11205 documentation file Date: Wed, 24 Aug 2022 15:52:02 +0300 Message-ID: <20220824125203.685287-2-ramona.bolboaca@analog.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220824125203.685287-1-ramona.bolboaca@analog.com> References: <20220824125203.685287-1-ramona.bolboaca@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: tKnM75TFC_3XaUtwuX_csVXNPbs2PN51 X-Proofpoint-ORIG-GUID: tKnM75TFC_3XaUtwuX_csVXNPbs2PN51 X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-24_07,2022-08-22_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 phishscore=0 priorityscore=1501 malwarescore=0 lowpriorityscore=0 suspectscore=0 mlxlogscore=999 spamscore=0 clxscore=1011 mlxscore=0 adultscore=0 bulkscore=0 impostorscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208240049 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add bindings documentation file and MAINTAINERS entry for MAX11205. Signed-off-by: Ramona Bolboaca --- .../bindings/iio/adc/maxim,max11205.yaml | 65 +++++++++++++++++++ MAINTAINERS | 8 +++ 2 files changed, 73 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml diff --git a/Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml b/Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml new file mode 100644 index 000000000000..bddd18a44969 --- /dev/null +++ b/Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml @@ -0,0 +1,65 @@ +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/adc/maxim,max11205.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: Maxim MAX11205 ADC + +maintainers: + - Ramona Bolboaca + +description: | + The MAX11205 is an ultra-low-power (< 300FA max + active current), high-resolution, serial-output ADC. + + https://datasheets.maximintegrated.com/en/ds/MAX11205.pdf + +properties: + compatible: + enum: + - maxim,max11205a + - maxim,max11205b + + reg: + maxItems: 1 + + interrupts: + maxItems: 1 + + spi-max-frequency: + maximum: 5000000 + + spi-cpha: true + + vref-supply: + description: + The regulator supply for the ADC reference voltage. + +required: + - compatible + - reg + - spi-max-frequency + - spi-cpha + - interrupts + - vref-supply + +additionalProperties: false + +examples: + - | + #include + spi { + #address-cells = <1>; + #size-cells = <0>; + max11205@0 { + compatible = "maxim,max11205a"; + reg = <0>; + spi-max-frequency = <5000000>; + spi-cpha; + interrupt-parent = <&gpio>; + interrupts = <19 IRQ_TYPE_EDGE_FALLING>; + vref-supply = <&max11205_vref>; + }; + }; +... diff --git a/MAINTAINERS b/MAINTAINERS index 96f47a7865d6..db1b5dc03988 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12341,6 +12341,14 @@ S: Maintained F: Documentation/devicetree/bindings/iio/proximity/maxbotix,mb1232.yaml F: drivers/iio/proximity/mb1232.c +MAXIM MAX11205 DRIVER +M: Ramona Bolboaca +L: linux-iio@vger.kernel.org +S: Supported +W: https://ez.analog.com/linux-software-drivers +F: Documentation/devicetree/bindings/iio/adc/maxim,max11205.yaml +F: drivers/iio/adc/max11205.c + MAXIM MAX17040 FAMILY FUEL GAUGE DRIVERS R: Iskren Chernev R: Krzysztof Kozlowski From patchwork Wed Aug 24 12:52:03 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ramona Bolboaca X-Patchwork-Id: 12953499 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id CA7C1C32796 for ; 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Wed, 24 Aug 2022 08:54:54 -0400 Received: from ASHBCASHYB4.ad.analog.com (10.64.17.132) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Wed, 24 Aug 2022 08:54:53 -0400 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by ASHBCASHYB4.ad.analog.com (10.64.17.132) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.986.14; Wed, 24 Aug 2022 08:54:53 -0400 Received: from zeus.spd.analog.com (10.66.68.11) by ashbmbx9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.2.986.14 via Frontend Transport; Wed, 24 Aug 2022 08:54:53 -0400 Received: from rbolboac.ad.analog.com ([10.48.65.109]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 27OCseSV004251; Wed, 24 Aug 2022 08:54:47 -0400 From: Ramona Bolboaca To: , , , , , CC: Ramona Bolboaca Subject: [PATCH 2/2] iio: adc: add max11205 adc driver Date: Wed, 24 Aug 2022 15:52:03 +0300 Message-ID: <20220824125203.685287-3-ramona.bolboaca@analog.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20220824125203.685287-1-ramona.bolboaca@analog.com> References: <20220824125203.685287-1-ramona.bolboaca@analog.com> MIME-Version: 1.0 X-ADIRuleOP-NewSCL: Rule Triggered X-Proofpoint-GUID: C3l9h8RBO-pn4MbT93mBp2DVw5Y46o0d X-Proofpoint-ORIG-GUID: C3l9h8RBO-pn4MbT93mBp2DVw5Y46o0d X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.205,Aquarius:18.0.895,Hydra:6.0.517,FMLib:17.11.122.1 definitions=2022-08-24_07,2022-08-22_02,2022-06-22_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 suspectscore=0 adultscore=0 lowpriorityscore=0 mlxscore=0 phishscore=0 spamscore=0 impostorscore=0 priorityscore=1501 bulkscore=0 mlxlogscore=999 malwarescore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2207270000 definitions=main-2208240049 Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Adding support for max11205 16-bit single-channel ultra-low power delta-sigma adc. The MAX11205 is compatible with the 2-wire interface and uses SCLK and RDY/DOUT for serial communica- tions. In this mode, all controls are implemented by tim- ing the high or low phase of the SCLK. The 2-wire serial interface only allows for data to be read out through the RDY/DOUT output. Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX11205.pdf Signed-off-by: Ramona Bolboaca --- drivers/iio/adc/Kconfig | 14 +++ drivers/iio/adc/Makefile | 1 + drivers/iio/adc/max11205.c | 192 +++++++++++++++++++++++++++++++++++++ 3 files changed, 207 insertions(+) create mode 100644 drivers/iio/adc/max11205.c diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index 7fe5930891e0..f0de4516a302 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -653,6 +653,20 @@ config MAX1118 To compile this driver as a module, choose M here: the module will be called max1118. +config MAX11205 + tristate "Maxim max11205 ADC driver" + depends on SPI + select AD_SIGMA_DELTA + select IIO_BUFFER + select IIO_TRIGGERED_BUFFER + + help + Say yes here to build support for Maxim max11205 + 16-bit, single-channel ultra-low power delta-sigma ADC. + + To compile this driver as a module, choose M here: the module will be + called max11205. + config MAX1241 tristate "Maxim max1241 ADC driver" depends on SPI_MASTER diff --git a/drivers/iio/adc/Makefile b/drivers/iio/adc/Makefile index 1772a549a3c8..bb681844e497 100644 --- a/drivers/iio/adc/Makefile +++ b/drivers/iio/adc/Makefile @@ -61,6 +61,7 @@ obj-$(CONFIG_LTC2497) += ltc2497.o ltc2497-core.o obj-$(CONFIG_MAX1027) += max1027.o obj-$(CONFIG_MAX11100) += max11100.o obj-$(CONFIG_MAX1118) += max1118.o +obj-$(CONFIG_MAX11205) += max11205.o obj-$(CONFIG_MAX1241) += max1241.o obj-$(CONFIG_MAX1363) += max1363.o obj-$(CONFIG_MAX9611) += max9611.o diff --git a/drivers/iio/adc/max11205.c b/drivers/iio/adc/max11205.c new file mode 100644 index 000000000000..b2d9f9085fde --- /dev/null +++ b/drivers/iio/adc/max11205.c @@ -0,0 +1,192 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * max11205 16-Bit Delta-Sigma ADC + * + * Datasheet: https://datasheets.maximintegrated.com/en/ds/MAX1240-max11205.pdf + * Copyright (C) 2022 Analog Devices, Inc. + * Author: Ramona Bolboaca + */ + +#include +#include +#include +#include + +#include +#include + +#define MAX11205_BIT_SCALE 15 +#define MAX11205A_OUT_DATA_RATE 116 +#define MAX11205B_OUT_DATA_RATE 13 + +enum chip_type { + TYPE_MAX11205A, + TYPE_MAX11205B, +}; + +struct chip_info { + unsigned int out_data_rate; + const char *name; +}; + +struct max11205_state { + const struct chip_info *chip_info; + struct regulator *vref; + struct ad_sigma_delta sd; +}; + +static const struct ad_sigma_delta_info max11205_sigma_delta_info = { + .has_registers = false, + .irq_flags = IRQF_TRIGGER_FALLING, +}; + +static int max11205_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + int *val, int *val2, long mask) +{ + struct max11205_state *st = iio_priv(indio_dev); + int reg_mv; + + switch (mask) { + case IIO_CHAN_INFO_RAW: + return ad_sigma_delta_single_conversion(indio_dev, chan, val); + case IIO_CHAN_INFO_SCALE: + reg_mv = regulator_get_voltage(st->vref); + if (reg_mv < 0) + return reg_mv; + reg_mv /= 1000; + *val = reg_mv; + *val2 = MAX11205_BIT_SCALE; + return IIO_VAL_FRACTIONAL_LOG2; + case IIO_CHAN_INFO_SAMP_FREQ: + *val = st->chip_info->out_data_rate; + return IIO_VAL_INT; + default: + return -EINVAL; + } +} + +static const struct iio_info max11205_iio_info = { + .read_raw = max11205_read_raw, + .validate_trigger = ad_sd_validate_trigger, +}; + +static const struct iio_chan_spec max11205_channels[] = { + { + .type = IIO_VOLTAGE, + .indexed = 1, + .scan_type = { + .sign = 's', + .realbits = 16, + .storagebits = 16, + .endianness = IIO_BE + }, + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | + BIT(IIO_CHAN_INFO_SAMP_FREQ) | + BIT(IIO_CHAN_INFO_SCALE), + }, +}; + +static void max11205_reg_disable(void *reg) +{ + regulator_disable(reg); +} + +static int max11205_probe(struct spi_device *spi) +{ + struct max11205_state *st; + struct iio_dev *indio_dev; + int ret; + + indio_dev = devm_iio_device_alloc(&spi->dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st = iio_priv(indio_dev); + + ad_sd_init(&st->sd, indio_dev, spi, &max11205_sigma_delta_info); + + st->chip_info = device_get_match_data(&spi->dev); + + indio_dev->name = st->chip_info->name; + indio_dev->modes = INDIO_DIRECT_MODE; + indio_dev->channels = max11205_channels; + indio_dev->num_channels = 1; + indio_dev->info = &max11205_iio_info; + + st->vref = devm_regulator_get(&spi->dev, "vref"); + if (IS_ERR(st->vref)) + return dev_err_probe(&spi->dev, PTR_ERR(st->vref), + "Failed to get vref regulator\n"); + + ret = regulator_enable(st->vref); + if (ret) + return ret; + + ret = devm_add_action_or_reset(&spi->dev, max11205_reg_disable, st->vref); + if (ret) + return ret; + + ret = devm_ad_sd_setup_buffer_and_trigger(&spi->dev, indio_dev); + if (ret) + return ret; + + return devm_iio_device_register(&spi->dev, indio_dev); +} + +static void max11205_remove(struct spi_device *spi) +{ + struct iio_dev *indio_dev = spi_get_drvdata(spi); + struct max11205_state *st = iio_priv(indio_dev); + + iio_device_unregister(indio_dev); + regulator_disable(st->vref); +} + +static const struct spi_device_id max11205_spi_ids[] = { + {"max11205a", TYPE_MAX11205A}, + {"max11205b", TYPE_MAX11205B}, + {} +}; +MODULE_DEVICE_TABLE(spi, max11205_spi_ids); + +static const struct chip_info max11205_chip_info[] = { + [TYPE_MAX11205A] = { + .out_data_rate = MAX11205A_OUT_DATA_RATE, + .name = "max11205a" + }, + [TYPE_MAX11205B] = { + .out_data_rate = MAX11205B_OUT_DATA_RATE, + .name = "max11205b" + } +}; + +static const struct of_device_id max11205_dt_ids[] = { + { + .compatible = "maxim,max11205a", + .data = &max11205_chip_info[TYPE_MAX11205A], + }, + { + .compatible = "maxim,max11205b", + .data = &max11205_chip_info[TYPE_MAX11205B], + }, + {} +}; +MODULE_DEVICE_TABLE(of, max11205_dt_ids); + +static struct spi_driver max11205_spi_driver = { + .driver = { + .name = "max11205", + .of_match_table = max11205_dt_ids, + }, + .probe = max11205_probe, + .remove = max11205_remove, + .id_table = max11205_spi_ids, +}; + +module_spi_driver(max11205_spi_driver); + +MODULE_AUTHOR("Ramona Bolboaca "); +MODULE_DESCRIPTION("MAX11205 ADC driver"); +MODULE_LICENSE("GPL v2"); +MODULE_IMPORT_NS(IIO_AD_SIGMA_DELTA);