From patchwork Thu Feb 6 15:11:45 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11368655 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 6689692A for ; Thu, 6 Feb 2020 15:10:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 4EA3321741 for ; Thu, 6 Feb 2020 15:10:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727516AbgBFPKC (ORCPT ); Thu, 6 Feb 2020 10:10:02 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:16950 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727389AbgBFPKC (ORCPT ); Thu, 6 Feb 2020 10:10:02 -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 016F0MvJ011983; Thu, 6 Feb 2020 10:09:38 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com with ESMTP id 2xyhm94w10-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 06 Feb 2020 10:09:38 -0500 Received: from ASHBMBX9.ad.analog.com (ashbmbx9.ad.analog.com [10.64.17.10]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 016F9btD017972 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Thu, 6 Feb 2020 10:09:37 -0500 Received: from ASHBMBX8.ad.analog.com (10.64.17.5) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Thu, 6 Feb 2020 10:09:36 -0500 Received: from zeus.spd.analog.com (10.64.82.11) by ASHBMBX8.ad.analog.com (10.64.17.5) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Thu, 6 Feb 2020 10:09:35 -0500 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 016F9VRW021605; Thu, 6 Feb 2020 10:09:31 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , Beniamin Bia Subject: [PATCH v5 1/5] iio: core: Handle 'dB' suffix in core Date: Thu, 6 Feb 2020 17:11:45 +0200 Message-ID: <20200206151149.32122-1-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=2020-02-06_01:2020-02-06,2020-02-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1011 lowpriorityscore=0 phishscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 suspectscore=1 bulkscore=0 adultscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002060114 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This patch handles the db suffix used for writing micro db values. Signed-off-by: Beniamin Bia --- Changes in v5: -handle both 'db' and ' db' cases drivers/iio/industrialio-core.c | 39 ++++++++++++++++++++++++++++++--- 1 file changed, 36 insertions(+), 3 deletions(-) diff --git a/drivers/iio/industrialio-core.c b/drivers/iio/industrialio-core.c index 65ff0d067018..684c3b151b29 100644 --- a/drivers/iio/industrialio-core.c +++ b/drivers/iio/industrialio-core.c @@ -769,17 +769,18 @@ static ssize_t iio_read_channel_info_avail(struct device *dev, } /** - * iio_str_to_fixpoint() - Parse a fixed-point number from a string + * __iio_str_to_fixpoint() - Parse a fixed-point number from a string * @str: The string to parse * @fract_mult: Multiplier for the first decimal place, should be a power of 10 * @integer: The integer part of the number * @fract: The fractional part of the number + * @scale_db: True if this should parse as dB * * Returns 0 on success, or a negative error code if the string could not be * parsed. */ -int iio_str_to_fixpoint(const char *str, int fract_mult, - int *integer, int *fract) +int __iio_str_to_fixpoint(const char *str, int fract_mult, + int *integer, int *fract, bool scale_db) { int i = 0, f = 0; bool integer_part = true, negative = false; @@ -810,6 +811,14 @@ int iio_str_to_fixpoint(const char *str, int fract_mult, break; else return -EINVAL; + } else if (!strncmp(str, " dB", sizeof(" dB") - 1) && scale_db) { + /* Ignore the dB suffix */ + str += sizeof(" dB") - 1; + continue; + } else if (!strncmp(str, "dB", sizeof("dB") - 1) && scale_db) { + /* Ignore the dB suffix */ + str += sizeof("dB") - 1; + continue; } else if (*str == '.' && integer_part) { integer_part = false; } else { @@ -832,6 +841,22 @@ int iio_str_to_fixpoint(const char *str, int fract_mult, } EXPORT_SYMBOL_GPL(iio_str_to_fixpoint); +/** + * iio_str_to_fixpoint() - Parse a fixed-point number from a string + * @str: The string to parse + * @fract_mult: Multiplier for the first decimal place, should be a power of 10 + * @integer: The integer part of the number + * @fract: The fractional part of the number + * + * Returns 0 on success, or a negative error code if the string could not be + * parsed. + */ +int iio_str_to_fixpoint(const char *str, int fract_mult, + int *integer, int *fract) +{ + return __iio_str_to_fixpoint(str, fract_mult, integer, fract, false); +} + static ssize_t iio_write_channel_info(struct device *dev, struct device_attribute *attr, const char *buf, @@ -842,6 +867,7 @@ static ssize_t iio_write_channel_info(struct device *dev, int ret, fract_mult = 100000; int integer, fract = 0; bool is_char = false; + bool scale_db = false; /* Assumes decimal - precision based on number of digits */ if (!indio_dev->info->write_raw) @@ -853,6 +879,9 @@ static ssize_t iio_write_channel_info(struct device *dev, case IIO_VAL_INT: fract_mult = 0; break; + case IIO_VAL_INT_PLUS_MICRO_DB: + scale_db = true; + /* fall through */ case IIO_VAL_INT_PLUS_MICRO: fract_mult = 100000; break; @@ -877,6 +906,10 @@ static ssize_t iio_write_channel_info(struct device *dev, if (ret) return ret; } + ret = __iio_str_to_fixpoint(buf, fract_mult, &integer, &fract, + scale_db); + if (ret) + return ret; ret = indio_dev->info->write_raw(indio_dev, this_attr->c, integer, fract, this_attr->address); From patchwork Thu Feb 6 15:11:46 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11368657 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 C55F292A for ; Thu, 6 Feb 2020 15:10:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id AE46021741 for ; Thu, 6 Feb 2020 15:10:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727581AbgBFPKG (ORCPT ); Thu, 6 Feb 2020 10:10:06 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:21762 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727579AbgBFPKE (ORCPT ); Thu, 6 Feb 2020 10:10:04 -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 016F0MvK011983; Thu, 6 Feb 2020 10:09:43 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com with ESMTP id 2xyhm94w18-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 06 Feb 2020 10:09:43 -0500 Received: from SCSQMBX11.ad.analog.com (scsqmbx11.ad.analog.com [10.77.17.10]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 016F9f25017984 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Thu, 6 Feb 2020 10:09:42 -0500 Received: from ASHBMBX9.ad.analog.com (10.64.17.10) by SCSQMBX11.ad.analog.com (10.77.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Thu, 6 Feb 2020 07:09:40 -0800 Received: from zeus.spd.analog.com (10.64.82.11) by ASHBMBX9.ad.analog.com (10.64.17.10) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Thu, 6 Feb 2020 10:09:40 -0500 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 016F9VRX021605; Thu, 6 Feb 2020 10:09:36 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , Beniamin Bia Subject: [PATCH v5 2/5] iio: amplifiers: ad8366: Add write_raw_get_fmt function Date: Thu, 6 Feb 2020 17:11:46 +0200 Message-ID: <20200206151149.32122-2-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200206151149.32122-1-beniamin.bia@analog.com> References: <20200206151149.32122-1-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=2020-02-06_01:2020-02-06,2020-02-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 phishscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 suspectscore=1 bulkscore=0 adultscore=0 spamscore=0 mlxscore=0 mlxlogscore=892 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002060114 Sender: linux-iio-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org This patch add write_raw_get_fmt function to specify conversion for hardware gain. Signed-off-by: Beniamin Bia --- Changes in v5: -nothing changed drivers/iio/amplifiers/ad8366.c | 13 +++++++++++++ 1 file changed, 13 insertions(+) diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c index 0176d3d8cc9c..95972ab60f42 100644 --- a/drivers/iio/amplifiers/ad8366.c +++ b/drivers/iio/amplifiers/ad8366.c @@ -180,9 +180,22 @@ static int ad8366_write_raw(struct iio_dev *indio_dev, return ret; } +static int ad8366_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_HARDWAREGAIN: + return IIO_VAL_INT_PLUS_MICRO_DB; + default: + return -EINVAL; + } +} + static const struct iio_info ad8366_info = { .read_raw = &ad8366_read_raw, .write_raw = &ad8366_write_raw, + .write_raw_get_fmt = &ad8366_write_raw_get_fmt, }; #define AD8366_CHAN(_channel) { \ From patchwork Thu Feb 6 15:11:47 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11368663 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 BEE2E924 for ; Thu, 6 Feb 2020 15:10:23 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 9464F2253D for ; Thu, 6 Feb 2020 15:10:23 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727681AbgBFPKP (ORCPT ); Thu, 6 Feb 2020 10:10:15 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:41406 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727652AbgBFPKO (ORCPT ); Thu, 6 Feb 2020 10:10:14 -0500 Received: from pps.filterd (m0167089.ppops.net [127.0.0.1]) by mx0a-00128a01.pphosted.com (8.16.0.42/8.16.0.42) with SMTP id 016F86ed020333; Thu, 6 Feb 2020 10:09:53 -0500 Received: from nwd2mta4.analog.com ([137.71.173.58]) by mx0a-00128a01.pphosted.com with ESMTP id 2xyhnkmv1a-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 06 Feb 2020 10:09:52 -0500 Received: from SCSQMBX11.ad.analog.com (scsqmbx11.ad.analog.com [10.77.17.10]) by nwd2mta4.analog.com (8.14.7/8.14.7) with ESMTP id 016F9opo018011 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Thu, 6 Feb 2020 10:09:51 -0500 Received: from SCSQMBX11.ad.analog.com (10.77.17.10) by SCSQMBX11.ad.analog.com (10.77.17.10) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Thu, 6 Feb 2020 07:09:49 -0800 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; Thu, 6 Feb 2020 07:09:49 -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 016F9VRY021605; Thu, 6 Feb 2020 10:09:39 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , Beniamin Bia , Michael Hennerich , Alexandru Ardelean Subject: [PATCH v5 3/5] iio: amplifiers: hmc425a: Add support for HMC425A attenuator Date: Thu, 6 Feb 2020 17:11:47 +0200 Message-ID: <20200206151149.32122-3-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200206151149.32122-1-beniamin.bia@analog.com> References: <20200206151149.32122-1-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=2020-02-06_01:2020-02-06,2020-02-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 priorityscore=1501 mlxscore=0 impostorscore=0 lowpriorityscore=0 spamscore=0 clxscore=1015 suspectscore=0 adultscore=0 bulkscore=0 mlxlogscore=999 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002060115 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 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 --- Changes in v5: -properties in HMC425A_CHAN on separate lines -of_device_get_match instead of of_match_device drivers/iio/amplifiers/Kconfig | 10 ++ drivers/iio/amplifiers/Makefile | 1 + drivers/iio/amplifiers/hmc425a.c | 253 +++++++++++++++++++++++++++++++ 3 files changed, 264 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..b0d624a7ad05 --- /dev/null +++ b/drivers/iio/amplifiers/hmc425a.c @@ -0,0 +1,253 @@ +// 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); + DECLARE_BITMAP(values, BITS_PER_TYPE(value)); + + values[0] = value; + + gpiod_set_array_value_cansleep(st->gpios->ndescs, st->gpios->desc, + NULL, 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 int hmc425a_write_raw_get_fmt(struct iio_dev *indio_dev, + struct iio_chan_spec const *chan, + long mask) +{ + switch (mask) { + case IIO_CHAN_INFO_HARDWAREGAIN: + return IIO_VAL_INT_PLUS_MICRO_DB; + default: + return -EINVAL; + } +} + +static const struct iio_info hmc425a_info = { + .read_raw = &hmc425a_read_raw, + .write_raw = &hmc425a_write_raw, + .write_raw_get_fmt = &hmc425a_write_raw_get_fmt, +}; + +#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) +{ + 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); + st->type = (enum hmc425a_type)of_device_get_match_data(&pdev->dev); + + 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; + } + + 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 Thu Feb 6 15:11:48 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11368661 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 A9BC792A for ; Thu, 6 Feb 2020 15:10:22 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 93EA2217F4 for ; Thu, 6 Feb 2020 15:10:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727563AbgBFPKP (ORCPT ); Thu, 6 Feb 2020 10:10:15 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:41350 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727641AbgBFPKO (ORCPT ); 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Thu, 6 Feb 2020 07:09:52 -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 016F9VRZ021605; Thu, 6 Feb 2020 10:09:42 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , Michael Hennerich , Beniamin Bia Subject: [PATCH v5 4/5] dt-bindings: iio: amplifiers: Add docs for HMC425A Step Attenuator Date: Thu, 6 Feb 2020 17:11:48 +0200 Message-ID: <20200206151149.32122-4-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200206151149.32122-1-beniamin.bia@analog.com> References: <20200206151149.32122-1-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=2020-02-06_01:2020-02-06,2020-02-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 phishscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 suspectscore=0 bulkscore=0 adultscore=0 spamscore=0 mlxscore=0 mlxlogscore=999 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002060114 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 Reviewed-by: Rob Herring --- Changes in v5: -minItems added for ctrl_gpios .../bindings/iio/amplifiers/adi,hmc425a.yaml | 49 +++++++++++++++++++ 1 file changed, 49 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..1c6d49685e9f --- /dev/null +++ b/Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml @@ -0,0 +1,49 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%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: true + + ctrl-gpios: + description: + Must contain an array of 6 GPIO specifiers, referring to the GPIO pins + connected to the control pins V1-V6. + minItems: 6 + maxItems: 6 + +required: + - compatible + - ctrl-gpios + +examples: + - | + #include + 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 Thu Feb 6 15:11:49 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Beniamin Bia X-Patchwork-Id: 11368659 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 E5C58924 for ; Thu, 6 Feb 2020 15:10:13 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CF2A12192A for ; Thu, 6 Feb 2020 15:10:13 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727613AbgBFPKN (ORCPT ); Thu, 6 Feb 2020 10:10:13 -0500 Received: from mx0a-00128a01.pphosted.com ([148.163.135.77]:39270 "EHLO mx0a-00128a01.pphosted.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727578AbgBFPKN (ORCPT ); Thu, 6 Feb 2020 10:10:13 -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 016F0MvL011983; Thu, 6 Feb 2020 10:09:53 -0500 Received: from nwd2mta3.analog.com ([137.71.173.56]) by mx0a-00128a01.pphosted.com with ESMTP id 2xyhm94w1k-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Thu, 06 Feb 2020 10:09:52 -0500 Received: from SCSQMBX10.ad.analog.com (scsqmbx10.ad.analog.com [10.77.17.5]) by nwd2mta3.analog.com (8.14.7/8.14.7) with ESMTP id 016F9pB6017037 (version=TLSv1/SSLv3 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128 verify=FAIL); Thu, 6 Feb 2020 10:09:51 -0500 Received: from SCSQMBX10.ad.analog.com (10.77.17.5) by SCSQMBX10.ad.analog.com (10.77.17.5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256) id 15.1.1779.2; Thu, 6 Feb 2020 07:09:49 -0800 Received: from zeus.spd.analog.com (10.64.82.11) by SCSQMBX10.ad.analog.com (10.77.17.5) with Microsoft SMTP Server id 15.1.1779.2 via Frontend Transport; Thu, 6 Feb 2020 07:09:49 -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 016F9VRa021605; Thu, 6 Feb 2020 10:09:45 -0500 From: Beniamin Bia To: CC: , , , , , , , , , , Beniamin Bia Subject: [PATCH v5 5/5] MAINTAINERS: add entry for hmc425a driver. Date: Thu, 6 Feb 2020 17:11:49 +0200 Message-ID: <20200206151149.32122-5-beniamin.bia@analog.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200206151149.32122-1-beniamin.bia@analog.com> References: <20200206151149.32122-1-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=2020-02-06_01:2020-02-06,2020-02-06 signatures=0 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 clxscore=1015 lowpriorityscore=0 phishscore=0 priorityscore=1501 impostorscore=0 malwarescore=0 suspectscore=1 bulkscore=0 adultscore=0 spamscore=0 mlxscore=0 mlxlogscore=961 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2001150001 definitions=main-2002060114 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 --- Changes in v5: -parse_maintainers runned MAINTAINERS | 9 +++++++++ 1 file changed, 9 insertions(+) diff --git a/MAINTAINERS b/MAINTAINERS index e699fe378e71..12e39dc0dc93 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -1063,6 +1063,15 @@ 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 +S: Supported +W: http://ez.analog.com/community/linux-device-drivers +F: Documentation/devicetree/bindings/iio/amplifiers/adi,hmc425a.yaml +F: drivers/iio/amplifiers/hmc425a.c + ANALOGBITS PLL LIBRARIES M: Paul Walmsley S: Supported