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Message-Id: <20260126-iio-ad8366-update-v2-6-c9a4d31aeb01@analog.com>
Date: Mon, 26 Jan 2026 13:51:07 +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 v2 6/6] iio: amplifiers: ad8366: Update device support
From: Rodrigo Alencar <rodrigo.alencar@...log.com>
Add support for the 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 | 72 ++++++++++++++++++++++++++++++++++++++++-
2 files changed, 77 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 9ad6a628376c..14de0418a234 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/cleanup.h>
@@ -67,6 +73,18 @@ static size_t simple_pack_code(struct ad8366_state *st)
return 1;
}
+static size_t adrf5731_pack_code(struct ad8366_state *st)
+{
+ st->data[0] = st->ch[0] << 2;
+ return 1;
+}
+
+static size_t hmc271_pack_code(struct ad8366_state *st)
+{
+ st->data[0] = bitrev8(st->ch[0] & 0x1F) >> 3;
+ return 1;
+}
+
static const struct ad8366_info ad8366_chip_info = {
.gain_min = 4500,
.gain_max = 20500,
@@ -91,6 +109,30 @@ static const struct ad8366_info adl5240_chip_info = {
.pack_code = simple_pack_code,
};
+static const struct ad8366_info adrf57x0_chip_info = {
+ .gain_min = -31500,
+ .gain_max = 0,
+ .gain_step = -500,
+ .num_channels = 1,
+ .pack_code = simple_pack_code,
+};
+
+static const struct ad8366_info adrf5731_chip_info = {
+ .gain_min = -30000,
+ .gain_max = 0,
+ .gain_step = -2000,
+ .num_channels = 1,
+ .pack_code = adrf5731_pack_code,
+};
+
+static const struct ad8366_info hmc271_chip_info = {
+ .gain_min = -31000,
+ .gain_max = 0,
+ .gain_step = 1000,
+ .num_channels = 1,
+ .pack_code = hmc271_pack_code,
+};
+
static const struct ad8366_info hmc792_chip_info = {
.gain_min = -15750,
.gain_max = 0,
@@ -99,6 +141,22 @@ static const struct ad8366_info hmc792_chip_info = {
.pack_code = simple_pack_code,
};
+static const struct ad8366_info hmc1018_chip_info = {
+ .gain_min = -31000,
+ .gain_max = 0,
+ .gain_step = 1000,
+ .num_channels = 1,
+ .pack_code = simple_pack_code,
+};
+
+static const struct ad8366_info hmc1019_chip_info = {
+ .gain_min = -15500,
+ .gain_max = 0,
+ .gain_step = 500,
+ .num_channels = 1,
+ .pack_code = simple_pack_code,
+};
+
static const struct ad8366_info hmc1119_chip_info = {
.gain_min = -31750,
.gain_max = 0,
@@ -253,7 +311,13 @@ static const struct spi_device_id ad8366_id[] = {
{"ad8366", (kernel_ulong_t)&ad8366_chip_info},
{"ada4961", (kernel_ulong_t)&ada4961_chip_info},
{"adl5240", (kernel_ulong_t)&adl5240_chip_info},
+ {"adrf5720", (kernel_ulong_t)&adrf57x0_chip_info},
+ {"adrf5730", (kernel_ulong_t)&adrf57x0_chip_info},
+ {"adrf5731", (kernel_ulong_t)&adrf5731_chip_info},
+ {"hmc271a", (kernel_ulong_t)&hmc271_chip_info},
{"hmc792a", (kernel_ulong_t)&hmc792_chip_info},
+ {"hmc1018a", (kernel_ulong_t)&hmc1018_chip_info},
+ {"hmc1019a", (kernel_ulong_t)&hmc1019_chip_info},
{"hmc1119", (kernel_ulong_t)&hmc1119_chip_info},
{ }
};
@@ -263,7 +327,13 @@ static const struct of_device_id ad8366_of_match[] = {
{ .compatible = "adi,ad8366", .data = &ad8366_chip_info },
{ .compatible = "adi,ada4961", .data = &ada4961_chip_info },
{ .compatible = "adi,adl5240", .data = &adl5240_chip_info },
+ { .compatible = "adi,adrf5720", .data = &adrf57x0_chip_info },
+ { .compatible = "adi,adrf5730", .data = &adrf57x0_chip_info },
+ { .compatible = "adi,adrf5731", .data = &adrf5731_chip_info },
+ { .compatible = "adi,hmc271a", .data = &hmc271_chip_info },
{ .compatible = "adi,hmc792a", .data = &hmc792_chip_info },
+ { .compatible = "adi,hmc1018a", .data = &hmc1018_chip_info },
+ { .compatible = "adi,hmc1019a", .data = &hmc1019_chip_info },
{ .compatible = "adi,hmc1119", .data = &hmc1119_chip_info },
{ }
};
--
2.43.0
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