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Message-Id: <20260119-iio-ad8366-update-v1-4-8044e23e964a@analog.com>
Date: Mon, 19 Jan 2026 14:36:58 +0000
From: Rodrigo Alencar via B4 Relay <devnull+rodrigo.alencar.analog.com@...nel.org>
To: linux-kernel@...r.kernel.org, linux-iio@...r.kernel.org,
devicetree@...r.kernel.org
Cc: Michael Hennerich <Michael.Hennerich@...log.com>,
Lars-Peter Clausen <lars@...afoo.de>, Jonathan Cameron <jic23@...nel.org>,
David Lechner <dlechner@...libre.com>, Andy Shevchenko <andy@...nel.org>,
Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
Conor Dooley <conor+dt@...nel.org>,
Rodrigo Alencar <rodrigo.alencar@...log.com>,
Alexandru Ardelean <alexandru.ardelean@...log.com>
Subject: [PATCH 4/7] iio: amplifiers: ad8366: Update device support
From: Rodrigo Alencar <rodrigo.alencar@...log.com>
This patch adds support for following digital step attenuators:
* HMC271A: 1dB LSB 5-Bit Digital Attenuator SMT, 0.7 - 3.7 GHz
* ADRF5720: 0.5 dB LSB, 6-Bit, Digital Attenuator, 9 kHz to 40 GHz
* ADRF5730: 0.5 dB LSB, 6-Bit, Digital Attenuator, 100 MHz to 40 GHz
* ADRF5731: 2 dB LSB, 4-Bit, Digital Attenuator, 100 MHz to 40 GHz
* HMC1018A: 1.0 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, 0.1 - 30 GHz
* HMC1019A: 0.5 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, 0.1 - 30 GHz
Additionally, copyright notice was updated with current year.
Co-developed-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@...log.com>
Co-developed-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Michael Hennerich <michael.hennerich@...log.com>
Signed-off-by: Rodrigo Alencar <rodrigo.alencar@...log.com>
---
drivers/iio/amplifiers/Kconfig | 6 +++
drivers/iio/amplifiers/ad8366.c | 86 ++++++++++++++++++++++++++++++++++++++++-
2 files changed, 91 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/amplifiers/Kconfig b/drivers/iio/amplifiers/Kconfig
index a8a604863eed..39d280d4d437 100644
--- a/drivers/iio/amplifiers/Kconfig
+++ b/drivers/iio/amplifiers/Kconfig
@@ -18,7 +18,13 @@ config AD8366
AD8366 Dual-Digital Variable Gain Amplifier (VGA)
ADA4961 BiCMOS RF Digital Gain Amplifier (DGA)
ADL5240 Digitally controlled variable gain amplifier (VGA)
+ ADRF5720: 0.5 dB LSB, 6-Bit, Silicon Digital Attenuator
+ ADRF5730: 0.5 dB LSB, 6-Bit, Silicon Digital Attenuator
+ ADRF5731: 2 dB LSB, 4-Bit, Silicon Digital Attenuator
+ HMC271A: 1dB LSB 5-Bit Digital Attenuator SMT
HMC792A 0.25 dB LSB GaAs MMIC 6-Bit Digital Attenuator
+ HMC1018A: 1.0 dB LSB GaAs MMIC 5-BIT Digital Attenuator
+ HMC1019A: 0.5 dB LSB GaAs MMIC 5-BIT Digital Attenuator
HMC1119 0.25 dB LSB, 7-Bit, Silicon Digital Attenuator
To compile this driver as a module, choose M here: the
diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c
index 63bb9f0179eb..160a8ab0c2ee 100644
--- a/drivers/iio/amplifiers/ad8366.c
+++ b/drivers/iio/amplifiers/ad8366.c
@@ -5,10 +5,16 @@
* AD8366 Dual-Digital Variable Gain Amplifier (VGA)
* ADA4961 BiCMOS RF Digital Gain Amplifier (DGA)
* ADL5240 Digitally controlled variable gain amplifier (VGA)
+ * ADRF5720: 0.5 dB LSB, 6-Bit, Silicon Digital Attenuator, 9 kHz to 40 GHz
+ * ADRF5730: 0.5 dB LSB, 6-Bit, Silicon Digital Attenuator, 100 MHz to 40 GHz
+ * ADRF5731: 2 dB LSB, 4-Bit, Silicon Digital Attenuator, 100 MHz to 40 GHz
+ * HMC271A: 1dB LSB 5-Bit Digital Attenuator SMT, 0.7 - 3.7 GHz
* HMC792A 0.25 dB LSB GaAs MMIC 6-Bit Digital Attenuator
+ * HMC1018A: 1.0 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, 0.1 - 30 GHz
+ * HMC1019A: 0.5 dB LSB GaAs MMIC 5-BIT DIGITAL ATTENUATOR, 0.1 - 30 GHz
* HMC1119 0.25 dB LSB, 7-Bit, Silicon Digital Attenuator
*
- * Copyright 2012-2019 Analog Devices Inc.
+ * Copyright 2012-2026 Analog Devices Inc.
*/
#include <linux/device.h>
@@ -29,7 +35,13 @@ enum ad8366_type {
ID_AD8366,
ID_ADA4961,
ID_ADL5240,
+ ID_ADRF5720,
+ ID_ADRF5730,
+ ID_ADRF5731,
+ ID_HMC271,
ID_HMC792,
+ ID_HMC1018,
+ ID_HMC1019,
ID_HMC1119,
};
@@ -67,10 +79,34 @@ static const struct ad8366_info ad8366_infos[] = {
.gain_min = -11500,
.gain_max = 20000,
},
+ [ID_ADRF5720] = {
+ .gain_min = -31500,
+ .gain_max = 0,
+ },
+ [ID_ADRF5730] = {
+ .gain_min = -31500,
+ .gain_max = 0,
+ },
+ [ID_ADRF5731] = {
+ .gain_min = -30000,
+ .gain_max = 0,
+ },
+ [ID_HMC271] = {
+ .gain_min = -31000,
+ .gain_max = 0,
+ },
[ID_HMC792] = {
.gain_min = -15750,
.gain_max = 0,
},
+ [ID_HMC1018] = {
+ .gain_min = -31000,
+ .gain_max = 0,
+ },
+ [ID_HMC1019] = {
+ .gain_min = -15500,
+ .gain_max = 0,
+ },
[ID_HMC1119] = {
.gain_min = -31750,
.gain_max = 0,
@@ -95,9 +131,17 @@ static int ad8366_write(struct iio_dev *indio_dev,
st->data[0] = ch_a & 0x1F;
break;
case ID_ADL5240:
+ case ID_ADRF5720:
+ case ID_ADRF5730:
+ case ID_ADRF5731:
st->data[0] = (ch_a & 0x3F);
break;
+ case ID_HMC271:
+ st->data[0] = bitrev8(ch_a & 0x1F) >> 3;
+ break;
case ID_HMC792:
+ case ID_HMC1018:
+ case ID_HMC1019:
case ID_HMC1119:
st->data[0] = ch_a;
break;
@@ -135,9 +179,23 @@ static int ad8366_read_raw(struct iio_dev *indio_dev,
case ID_ADL5240:
gain = 20000 - 31500 + code * 500;
break;
+ case ID_ADRF5720:
+ case ID_ADRF5730:
+ gain = -1 * code * 500;
+ break;
+ case ID_ADRF5731:
+ gain = -1 * code * 500;
+ break;
case ID_HMC792:
gain = -1 * code * 500;
break;
+ case ID_HMC271:
+ case ID_HMC1018:
+ gain = -31000 + code * 1000;
+ break;
+ case ID_HMC1019:
+ gain = -15500 + code * 500;
+ break;
case ID_HMC1119:
gain = -1 * code * 250;
break;
@@ -187,9 +245,23 @@ static int ad8366_write_raw(struct iio_dev *indio_dev,
case ID_ADL5240:
code = ((gain - 500 - 20000) / 500) & 0x3F;
break;
+ case ID_ADRF5720:
+ case ID_ADRF5730:
+ code = (abs(gain) / 500) & 0x3F;
+ break;
+ case ID_ADRF5731:
+ code = (abs(gain) / 500) & 0x3C;
+ break;
case ID_HMC792:
code = (abs(gain) / 500) & 0x3F;
break;
+ case ID_HMC271:
+ case ID_HMC1018:
+ code = ((gain - 1000) / 1000) & 0x1F;
+ break;
+ case ID_HMC1019:
+ code = ((gain - 500) / 500) & 0x1F;
+ break;
case ID_HMC1119:
code = (abs(gain) / 250) & 0x7F;
break;
@@ -275,8 +347,14 @@ static int ad8366_probe(struct spi_device *spi)
break;
case ID_ADA4961:
case ID_ADL5240:
+ case ID_HMC271:
case ID_HMC792:
case ID_HMC1119:
+ case ID_ADRF5720:
+ case ID_ADRF5730:
+ case ID_ADRF5731:
+ case ID_HMC1018:
+ case ID_HMC1019:
st->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_HIGH);
if (IS_ERR(st->reset_gpio)) {
ret = PTR_ERR(st->reset_gpio);
@@ -335,8 +413,14 @@ static void ad8366_remove(struct spi_device *spi)
static const struct spi_device_id ad8366_id[] = {
{"ad8366", ID_AD8366},
{"ada4961", ID_ADA4961},
+ {"adrf5720", ID_ADRF5720},
+ {"adrf5730", ID_ADRF5730},
+ {"adrf5731", ID_ADRF5731},
{"adl5240", ID_ADL5240},
+ {"hmc271a", ID_HMC271},
{"hmc792a", ID_HMC792},
+ {"hmc1018a", ID_HMC1018},
+ {"hmc1019a", ID_HMC1019},
{"hmc1119", ID_HMC1119},
{ }
};
--
2.43.0
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