| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <20251031160405.13286-3-antoniu.miclaus@analog.com>
Date: Fri, 31 Oct 2025 16:04:04 +0000
From: Antoniu Miclaus <antoniu.miclaus@...log.com>
To: <jic23@...nel.org>, <robh@...nel.org>, <conor+dt@...nel.org>,
<linux-iio@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<devicetree@...r.kernel.org>
CC: Antoniu Miclaus <antoniu.miclaus@...log.com>
Subject: [PATCH 2/3] iio: amplifiers: adl8113: add driver support
Add support for adl8113 10MHz to 12GHz Low Noise Amplifier with
10MHz to 14GHz bypass switches.
Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
---
drivers/iio/amplifiers/Kconfig | 12 ++
drivers/iio/amplifiers/Makefile | 1 +
drivers/iio/amplifiers/adl8113.c | 235 +++++++++++++++++++++++++++++++
3 files changed, 248 insertions(+)
create mode 100644 drivers/iio/amplifiers/adl8113.c
diff --git a/drivers/iio/amplifiers/Kconfig b/drivers/iio/amplifiers/Kconfig
index 55eb16b32f6c..a8a604863eed 100644
--- a/drivers/iio/amplifiers/Kconfig
+++ b/drivers/iio/amplifiers/Kconfig
@@ -36,6 +36,18 @@ config ADA4250
To compile this driver as a module, choose M here: the
module will be called ada4250.
+config ADL8113
+ tristate "Analog Devices ADL8113 Low Noise Amplifier"
+ depends on GPIOLIB
+ help
+ Say yes here to build support for Analog Devices ADL8113 Low Noise
+ Amplifier with integrated bypass switches. The device supports four
+ operation modes controlled by GPIO pins: internal amplifier,
+ internal bypass, and two external bypass modes.
+
+ To compile this driver as a module, choose M here: the
+ module will be called adl8113.
+
config HMC425
tristate "Analog Devices HMC425A and similar GPIO Gain Amplifiers"
depends on GPIOLIB
diff --git a/drivers/iio/amplifiers/Makefile b/drivers/iio/amplifiers/Makefile
index 2126331129cf..0a76443be1aa 100644
--- a/drivers/iio/amplifiers/Makefile
+++ b/drivers/iio/amplifiers/Makefile
@@ -6,4 +6,5 @@
# When adding new entries keep the list in alphabetical order
obj-$(CONFIG_AD8366) += ad8366.o
obj-$(CONFIG_ADA4250) += ada4250.o
+obj-$(CONFIG_ADL8113) += adl8113.o
obj-$(CONFIG_HMC425) += hmc425a.o
diff --git a/drivers/iio/amplifiers/adl8113.c b/drivers/iio/amplifiers/adl8113.c
new file mode 100644
index 000000000000..4a05c1497913
--- /dev/null
+++ b/drivers/iio/amplifiers/adl8113.c
@@ -0,0 +1,235 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * ADL8113 Low Noise Amplifier with integrated bypass switches
+ *
+ * Copyright 2025 Analog Devices Inc.
+ */
+
+#include <linux/device.h>
+#include <linux/err.h>
+#include <linux/gpio/consumer.h>
+#include <linux/iio/iio.h>
+#include <linux/iio/sysfs.h>
+#include <linux/kernel.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/property.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/sysfs.h>
+
+enum adl8113_mode {
+ ADL8113_INTERNAL_AMPLIFIER,
+ ADL8113_INTERNAL_BYPASS,
+ ADL8113_EXTERNAL_BYPASS_A,
+ ADL8113_EXTERNAL_BYPASS_B
+};
+
+struct adl8113_state {
+ struct mutex lock; /* protect sensor state */
+ struct gpio_desc *gpio_va;
+ struct gpio_desc *gpio_vb;
+ enum adl8113_mode current_mode;
+};
+
+static const char * const adl8113_supply_names[] = {
+ "vdd1",
+ "vdd2",
+ "vss2"
+};
+
+static const char * const adl8113_mode_names[] = {
+ [ADL8113_INTERNAL_AMPLIFIER] = "internal_amplifier",
+ [ADL8113_INTERNAL_BYPASS] = "internal_bypass",
+ [ADL8113_EXTERNAL_BYPASS_A] = "external_bypass_a",
+ [ADL8113_EXTERNAL_BYPASS_B] = "external_bypass_b",
+};
+
+static int adl8113_set_mode(struct adl8113_state *st, enum adl8113_mode mode)
+{
+ switch (mode) {
+ case ADL8113_INTERNAL_AMPLIFIER:
+ gpiod_set_value(st->gpio_va, 0);
+ gpiod_set_value(st->gpio_vb, 0);
+ break;
+ case ADL8113_INTERNAL_BYPASS:
+ gpiod_set_value(st->gpio_va, 1);
+ gpiod_set_value(st->gpio_vb, 1);
+ break;
+ case ADL8113_EXTERNAL_BYPASS_A:
+ gpiod_set_value(st->gpio_va, 0);
+ gpiod_set_value(st->gpio_vb, 1);
+ break;
+ case ADL8113_EXTERNAL_BYPASS_B:
+ gpiod_set_value(st->gpio_va, 1);
+ gpiod_set_value(st->gpio_vb, 0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ st->current_mode = mode;
+ return 0;
+}
+
+static int adl8113_get_mode(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan)
+{
+ struct adl8113_state *st = iio_priv(indio_dev);
+
+ return st->current_mode;
+}
+
+static int adl8113_set_mode_enum(struct iio_dev *indio_dev,
+ const struct iio_chan_spec *chan,
+ unsigned int mode)
+{
+ struct adl8113_state *st = iio_priv(indio_dev);
+ int ret;
+
+ if (mode >= ARRAY_SIZE(adl8113_mode_names))
+ return -EINVAL;
+
+ mutex_lock(&st->lock);
+ ret = adl8113_set_mode(st, mode);
+ mutex_unlock(&st->lock);
+
+ return ret;
+}
+
+static const struct iio_enum adl8113_mode_enum = {
+ .items = adl8113_mode_names,
+ .num_items = ARRAY_SIZE(adl8113_mode_names),
+ .get = adl8113_get_mode,
+ .set = adl8113_set_mode_enum,
+};
+
+static const struct iio_chan_spec_ext_info adl8113_ext_info[] = {
+ IIO_ENUM("mode", IIO_SHARED_BY_ALL, &adl8113_mode_enum),
+ IIO_ENUM_AVAILABLE("mode", IIO_SHARED_BY_ALL, &adl8113_mode_enum),
+ { },
+};
+
+static const struct iio_chan_spec adl8113_channels[] = {
+ {
+ .type = IIO_VOLTAGE,
+ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_HARDWAREGAIN),
+ .indexed = 1,
+ .channel = 0,
+ .ext_info = adl8113_ext_info,
+ },
+};
+
+static int adl8113_read_raw(struct iio_dev *indio_dev,
+ struct iio_chan_spec const *chan,
+ int *val, int *val2, long mask)
+{
+ struct adl8113_state *st = iio_priv(indio_dev);
+ int ret;
+
+ switch (mask) {
+ case IIO_CHAN_INFO_HARDWAREGAIN:
+ mutex_lock(&st->lock);
+ switch (st->current_mode) {
+ case ADL8113_INTERNAL_AMPLIFIER:
+ *val = 14;
+ *val2 = 0;
+ ret = IIO_VAL_INT_PLUS_MICRO_DB;
+ break;
+ case ADL8113_INTERNAL_BYPASS:
+ case ADL8113_EXTERNAL_BYPASS_A:
+ case ADL8113_EXTERNAL_BYPASS_B:
+ *val = 0;
+ *val2 = 0;
+ ret = IIO_VAL_INT_PLUS_MICRO_DB;
+ break;
+ default:
+ ret = -EINVAL;
+ }
+ mutex_unlock(&st->lock);
+ return ret;
+ default:
+ return -EINVAL;
+ }
+}
+
+static const struct iio_info adl8113_info = {
+ .read_raw = adl8113_read_raw,
+};
+
+static int adl8113_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct adl8113_state *st;
+ struct iio_dev *indio_dev;
+ u32 initial_mode = ADL8113_INTERNAL_AMPLIFIER;
+ int ret;
+
+ indio_dev = devm_iio_device_alloc(dev, sizeof(*st));
+ if (!indio_dev)
+ return -ENOMEM;
+
+ st = iio_priv(indio_dev);
+ mutex_init(&st->lock);
+
+ st->gpio_va = devm_gpiod_get(dev, "va", GPIOD_OUT_LOW);
+ if (IS_ERR(st->gpio_va))
+ return dev_err_probe(dev, PTR_ERR(st->gpio_va),
+ "failed to get VA GPIO\n");
+
+ st->gpio_vb = devm_gpiod_get(dev, "vb", GPIOD_OUT_LOW);
+ if (IS_ERR(st->gpio_vb))
+ return dev_err_probe(dev, PTR_ERR(st->gpio_vb),
+ "failed to get VB GPIO\n");
+
+ ret = devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(adl8113_supply_names),
+ adl8113_supply_names);
+ if (ret)
+ return dev_err_probe(dev, ret,
+ "failed to get and enable supplies\n");
+
+ device_property_read_u32(dev, "adi,initial-mode", &initial_mode);
+ if (initial_mode >= ARRAY_SIZE(adl8113_mode_names))
+ return -EINVAL;
+
+ ret = adl8113_set_mode(st, initial_mode);
+ if (ret)
+ return ret;
+
+ indio_dev->info = &adl8113_info;
+ indio_dev->name = "adl8113";
+ indio_dev->channels = adl8113_channels;
+ indio_dev->num_channels = ARRAY_SIZE(adl8113_channels);
+ indio_dev->modes = INDIO_DIRECT_MODE;
+
+ ret = devm_iio_device_register(dev, indio_dev);
+ if (ret)
+ return ret;
+
+ dev_info(dev, "ADL8113 registered, initial mode: %s\n",
+ adl8113_mode_names[initial_mode]);
+
+ return 0;
+}
+
+static const struct of_device_id adl8113_of_match[] = {
+ { .compatible = "adi,adl8113" },
+ {}
+};
+MODULE_DEVICE_TABLE(of, adl8113_of_match);
+
+static struct platform_driver adl8113_driver = {
+ .driver = {
+ .name = "adl8113",
+ .of_match_table = adl8113_of_match,
+ },
+ .probe = adl8113_probe,
+};
+
+module_platform_driver(adl8113_driver);
+
+MODULE_AUTHOR("Antoniu Miclaus <antoniu.miclaus@...log.com>");
+MODULE_DESCRIPTION("Analog Devices ADL8113 Low Noise Amplifier");
+MODULE_LICENSE("GPL");
--
2.43.0
Powered by blists - more mailing lists