From patchwork Wed Jan 22 12:17:00 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11345651 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 EC7C7139A for ; Wed, 22 Jan 2020 12:15:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id C0BEE2467F for ; Wed, 22 Jan 2020 12:15:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728912AbgAVMPl (ORCPT ); Wed, 22 Jan 2020 07:15:41 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:30028 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726204AbgAVMPl (ORCPT ); Wed, 22 Jan 2020 07:15:41 -0500 Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00MCF6qR012257; Wed, 22 Jan 2020 07:15:17 -0500 Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com with ESMTP id 2xkvrbjpxm-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 22 Jan 2020 07:15:17 -0500 Received: from ASHBMBX8.ad.analog.com (ashbmbx8.ad.analog.com [10.64.17.5]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 00MCFGZW041101 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Wed, 22 Jan 2020 07:15:16 -0500 Received: from SCSQMBX11.ad.analog.com (10.77.17.10) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Wed, 22 Jan 2020 07:15:14 -0500 Received: from zeus.spd.analog.com (10.64.82.11) by SCSQMBX11.ad.analog.com (10.77.17.10) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Wed, 22 Jan 2020 04:15:14 -0800 Received: from ben-Latitude-E6540.ad.analog.com ([10.48.65.231]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 00MCF511031122; Wed, 22 Jan 2020 07:15:05 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , Michael Hennerich , Alexandru Ardelean , Beniamin Bia Subject: [PATCH v2 1/3] iio: amplifiers: hmc425a: Add support for HMC425A step attenuator with gpio interface Date: Wed, 22 Jan 2020 14:17:00 +0200 Message-ID: <20200122121702.30494-1-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-17_05:2020-01-16,2020-01-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 suspectscore=0 mlxscore=0 malwarescore=0 impostorscore=0 adultscore=0 phishscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001220112 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Michael Hennerich This patch adds support for the HMC425A 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz. Datasheet: https://www.analog.com/media/en/technical-documentation/data-sheets/hmc425A.pdf Signed-off-by: Michael Hennerich Signed-off-by: Alexandru Ardelean Signed-off-by: Beniamin Bia --- drivers/iio/amplifiers/Kconfig | 10 ++ drivers/iio/amplifiers/Makefile | 1 + drivers/iio/amplifiers/hmc425a.c | 251 +++++++++++++++++++++++++++++++ 3 files changed, 262 insertions(+) create mode 100644 drivers/iio/amplifiers/hmc425a.c diff --git a/drivers/iio/amplifiers/Kconfig b/drivers/iio/amplifiers/Kconfig index da7f126d197b..9b02c9a2bc8a 100644 --- a/drivers/iio/amplifiers/Kconfig +++ b/drivers/iio/amplifiers/Kconfig @@ -22,4 +22,14 @@ config AD8366 To compile this driver as a module, choose M here: the module will be called ad8366. +config HMC425 + tristate "Analog Devices HMC425A and similar GPIO Gain Amplifiers" + depends on GPIOLIB + help + Say yes here to build support for Analog Devices HMC425A and similar + gain amplifiers or step attenuators. + + To compile this driver as a module, choose M here: the + module will be called hmc425a. + endmenu diff --git a/drivers/iio/amplifiers/Makefile b/drivers/iio/amplifiers/Makefile index 9abef2ebe9bc..19a89db1d9b1 100644 --- a/drivers/iio/amplifiers/Makefile +++ b/drivers/iio/amplifiers/Makefile @@ -5,3 +5,4 @@ # When adding new entries keep the list in alphabetical order obj-$(CONFIG_AD8366) += ad8366.o +obj-$(CONFIG_HMC425) += hmc425a.o \ No newline at end of file diff --git a/drivers/iio/amplifiers/hmc425a.c b/drivers/iio/amplifiers/hmc425a.c new file mode 100644 index 000000000000..0a412d56eb8f --- /dev/null +++ b/drivers/iio/amplifiers/hmc425a.c @@ -0,0 +1,251 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * HMC425A and similar Gain Amplifiers + * + * Copyright 2020 Analog Devices Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +enum hmc425a_type { + ID_HMC425A, +}; + +struct hmc425a_chip_info { + const char *name; + const struct iio_chan_spec *channels; + unsigned int num_channels; + unsigned int num_gpios; + int gain_min; + int gain_max; + int default_gain; +}; + +struct hmc425a_state { + struct regulator *reg; + struct mutex lock; /* protect sensor state */ + struct hmc425a_chip_info *chip_info; + struct gpio_descs *gpios; + enum hmc425a_type type; + u32 gain; +}; + +static int hmc425a_write(struct iio_dev *indio_dev, u32 value) +{ + struct hmc425a_state *st = iio_priv(indio_dev); + int i, *values; + + values = kmalloc_array(st->chip_info->num_gpios, sizeof(int), + GFP_KERNEL); + if (!values) + return -ENOMEM; + + for (i = 0; i < st->chip_info->num_gpios; i++) + values[i] = (value >> i) & 1; + + gpiod_set_array_value_cansleep(st->gpios->ndescs, st->gpios->desc, + values); + kfree(values); + return 0; +} + +static int hmc425a_read_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int *val, + int *val2, long m) +{ + struct hmc425a_state *st = iio_priv(indio_dev); + int code, gain = 0; + int ret; + + mutex_lock(&st->lock); + switch (m) { + case IIO_CHAN_INFO_HARDWAREGAIN: + code = st->gain; + + switch (st->type) { + case ID_HMC425A: + gain = ~code * -500; + break; + } + + *val = gain / 1000; + *val2 = (gain % 1000) * 1000; + + ret = IIO_VAL_INT_PLUS_MICRO_DB; + break; + default: + ret = -EINVAL; + } + mutex_unlock(&st->lock); + + return ret; +}; + +static int hmc425a_write_raw(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, int val, + int val2, long mask) +{ + struct hmc425a_state *st = iio_priv(indio_dev); + struct hmc425a_chip_info *inf = st->chip_info; + int code = 0, gain; + int ret; + + if (val < 0) + gain = (val * 1000) - (val2 / 1000); + else + gain = (val * 1000) + (val2 / 1000); + + if (gain > inf->gain_max || gain < inf->gain_min) + return -EINVAL; + + switch (st->type) { + case ID_HMC425A: + code = ~((abs(gain) / 500) & 0x3F); + break; + } + + mutex_lock(&st->lock); + switch (mask) { + case IIO_CHAN_INFO_HARDWAREGAIN: + st->gain = code; + + ret = hmc425a_write(indio_dev, st->gain); + break; + default: + ret = -EINVAL; + } + mutex_unlock(&st->lock); + + return ret; +} + +static const struct iio_info hmc425a_info = { + .read_raw = &hmc425a_read_raw, + .write_raw = &hmc425a_write_raw, +}; + +#define HMC425A_CHAN(_channel) \ +{ \ + .type = IIO_VOLTAGE, .output = 1, .indexed = 1, \ + .channel = _channel, \ + .info_mask_separate = BIT(IIO_CHAN_INFO_HARDWAREGAIN), \ +} + +static const struct iio_chan_spec hmc425a_channels[] = { + HMC425A_CHAN(0), +}; + +/* Match table for of_platform binding */ +static const struct of_device_id hmc425a_of_match[] = { + { .compatible = "adi,hmc425a", .data = (void *)ID_HMC425A }, + {}, +}; +MODULE_DEVICE_TABLE(of, hmc425a_of_match); + +static void hmc425a_reg_disable(void *data) +{ + struct hmc425a_state *st = data; + + regulator_disable(st->reg); +} + +static struct hmc425a_chip_info hmc425a_chip_info_tbl[] = { + [ID_HMC425A] = { + .name = "hmc425a", + .channels = hmc425a_channels, + .num_channels = ARRAY_SIZE(hmc425a_channels), + .num_gpios = 6, + .gain_min = -31500, + .gain_max = 0, + .default_gain = -0x40, /* set default gain -31.5db*/ + }, +}; + +static int hmc425a_probe(struct platform_device *pdev) +{ + const struct of_device_id *id; + struct iio_dev *indio_dev; + struct hmc425a_state *st; + int ret; + + indio_dev = devm_iio_device_alloc(&pdev->dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st = iio_priv(indio_dev); + id = of_match_device(hmc425a_of_match, &pdev->dev); + if (!id) + ret = -ENODEV; + + st->type = (enum hmc425a_type)id->data; + + st->chip_info = &hmc425a_chip_info_tbl[st->type]; + indio_dev->num_channels = st->chip_info->num_channels; + indio_dev->channels = st->chip_info->channels; + indio_dev->name = st->chip_info->name; + st->gain = st->chip_info->default_gain; + + st->gpios = devm_gpiod_get_array(&pdev->dev, "ctrl", GPIOD_OUT_LOW); + if (IS_ERR(st->gpios)) { + ret = PTR_ERR(st->gpios); + if (ret != -EPROBE_DEFER) + dev_err(&pdev->dev, "failed to get gpios\n"); + return ret; + } + + if (st->gpios->ndescs != st->chip_info->num_gpios) { + dev_err(&pdev->dev, "%d GPIOs needed to operate\n", + st->chip_info->num_gpios); + return -ENODEV; + } + + st->reg = devm_regulator_get_optional(&pdev->dev, "vcc-supply"); + if (IS_ERR(st->reg)) { + if (PTR_ERR(st->reg) == -EPROBE_DEFER) + return -EPROBE_DEFER; + + st->reg = NULL; + } else { + ret = regulator_enable(st->reg); + if (ret) + return ret; + ret = devm_add_action_or_reset(&pdev->dev, hmc425a_reg_disable, + st); + if (ret) + return ret; + } + + platform_set_drvdata(pdev, indio_dev); + mutex_init(&st->lock); + + indio_dev->dev.parent = &pdev->dev; + indio_dev->info = &hmc425a_info; + indio_dev->modes = INDIO_DIRECT_MODE; + + return devm_iio_device_register(&pdev->dev, indio_dev); +} + +static struct platform_driver hmc425a_driver = { + .driver = { + .name = KBUILD_MODNAME, + .of_match_table = hmc425a_of_match, + }, + .probe = hmc425a_probe, +}; +module_platform_driver(hmc425a_driver); + +MODULE_AUTHOR("Michael Hennerich "); +MODULE_DESCRIPTION("Analog Devices HMC425A and similar GPIO control Gain Amplifiers"); +MODULE_LICENSE("GPL v2"); From patchwork Wed Jan 22 12:17:01 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11345653 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 D351B921 for ; Wed, 22 Jan 2020 12:15:59 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BB3E924689 for ; Wed, 22 Jan 2020 12:15:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729239AbgAVMPv (ORCPT ); Wed, 22 Jan 2020 07:15:51 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:39556 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729188AbgAVMPv (ORCPT ); Wed, 22 Jan 2020 07:15:51 -0500 Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00MCFUSE012424; 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Wed, 22 Jan 2020 07:15:19 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , Michael Hennerich , Beniamin Bia Subject: [PATCH v2 2/3] dt-bindings: iio: amplifiers: Add docs for HMC425A Step Attenuator Date: Wed, 22 Jan 2020 14:17:01 +0200 Message-ID: <20200122121702.30494-2-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200122121702.30494-1-beniamin.bia@analog.com> References: <20200122121702.30494-1-beniamin.bia@analog.com> MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-17_05:2020-01-16,2020-01-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 suspectscore=0 mlxscore=0 malwarescore=0 impostorscore=0 adultscore=0 phishscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001220112 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Michael Hennerich Document support for Analog Devices MC425A Step Attenuator. Signed-off-by: Michael Hennerich Signed-off-by: Beniamin Bia --- .../bindings/iio/amplifiers/adi,hmc425a.yaml | 56 +++++++++++++++++++ 1 file changed, 56 insertions(+) create mode 100644 Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml diff --git a/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml b/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml new file mode 100644 index 000000000000..a0afa661f4ac --- /dev/null +++ b/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml @@ -0,0 +1,56 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/iio/amplifiers/adi,hmc425a.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: HMC425A 6-bit Digital Step Attenuator + +maintainers: +- Michael Hennerich +- Beniamin Bia + +description: | + Digital Step Attenuator IIO device with gpio interface. + HMC425A 0.5 dB LSB GaAs MMIC 6-BIT DIGITAL POSITIVE CONTROL ATTENUATOR, 2.2 - 8.0 GHz + https://www.analog.com/media/en/technical-documentation/data-sheets/hmc425A.pdf + +properties: + compatible: + enum: + - adi,hmc425a + + vcc-supply: + description: + Digital voltage regulator (see regulator/regulator.txt) + maxItems: 1 + + ctrl-gpios: + description: + Must contain an array of 6 GPIO specifiers, referring to the GPIO pins + connected to the control pins V1-V6. + maxItems: 6 + +required: + - compatible + - ctrl-gpios + +examples: + - | + #include + gpio { + #address-cells = <1>; + #size-cells = <0>; + gpio_hmc425a: hmc425a { + compatible = "adi,hmc425a"; + ctrl-gpios = <&gpio 40 GPIO_ACTIVE_HIGH>, + <&gpio 39 GPIO_ACTIVE_HIGH>, + <&gpio 38 GPIO_ACTIVE_HIGH>, + <&gpio 37 GPIO_ACTIVE_HIGH>, + <&gpio 36 GPIO_ACTIVE_HIGH>, + <&gpio 35 GPIO_ACTIVE_HIGH>; + + vcc-supply = <&foo>; + }; + }; +... From patchwork Wed Jan 22 12:17:02 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11345655 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 AA951139A for ; Wed, 22 Jan 2020 12:16:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 92E3B24683 for ; Wed, 22 Jan 2020 12:16:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729163AbgAVMPu (ORCPT ); Wed, 22 Jan 2020 07:15:50 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:38542 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726204AbgAVMPt (ORCPT ); Wed, 22 Jan 2020 07:15:49 -0500 Received: from pps.filterd (m0167088.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 00MCF74Z012293; Wed, 22 Jan 2020 07:15:29 -0500 Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com with ESMTP id 2xkvrbjpyj-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Wed, 22 Jan 2020 07:15:29 -0500 Received: from ASHBMBX8.ad.analog.com (ashbmbx8.ad.analog.com [10.64.17.5]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 00MCFS0R041149 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Wed, 22 Jan 2020 07:15:28 -0500 Received: from SCSQMBX11.ad.analog.com (10.77.17.10) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Wed, 22 Jan 2020 07:15:27 -0500 Received: from zeus.spd.analog.com (10.64.82.11) by SCSQMBX11.ad.analog.com (10.77.17.10) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Wed, 22 Jan 2020 04:15:26 -0800 Received: from ben-Latitude-E6540.ad.analog.com ([10.48.65.231]) by zeus.spd.analog.com (8.15.1/8.15.1) with ESMTP id 00MCF513031122; Wed, 22 Jan 2020 07:15:23 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , Beniamin Bia Subject: [PATCH v2 3/3] MAINTAINERS: add entry for hmc425a driver. Date: Wed, 22 Jan 2020 14:17:02 +0200 Message-ID: <20200122121702.30494-3-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200122121702.30494-1-beniamin.bia@analog.com> References: <20200122121702.30494-1-beniamin.bia@analog.com> MIME-Version: 1.0 X-ADIRoutedOnPrem: True X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.138,18.0.572 definitions=2020-01-17_05:2020-01-16,2020-01-17 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 spamscore=0 lowpriorityscore=0 suspectscore=1 mlxscore=0 malwarescore=0 impostorscore=0 adultscore=0 phishscore=0 bulkscore=0 clxscore=1015 priorityscore=1501 mlxlogscore=853 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-1910280000 definitions=main-2001220112 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org Add Beniamin Bia and Michael Hennerich as maintainers for HMC425A attenuator. Signed-off-by: Beniamin Bia --- MAINTAINERS | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index ec05a06d7ddb..9ae436d67edf 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1057,6 +1057,15 @@ F: drivers/iio/adc/ltc249* X: drivers/iio/*/adjd* F: drivers/staging/iio/*/ad* +ANALOG DEVICES INC HMC425A DRIVER +M: Beniamin Bia +M: Michael Hennerich +L: linux-iio@vger.kernel.org +W: http://ez.analog.com/community/linux-device-drivers +S: Supported +F: drivers/iio/amplifiers/hmc425a.c +F: Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml + ANALOGBITS PLL LIBRARIES M: Paul Walmsley S: Supported