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charset="utf-8" Add support for adl8113 10MHz to 12GHz Low Noise Amplifier with 10MHz to 14GHz bypass switches. Signed-off-by: Antoniu Miclaus --- Changes in v2: - Add linux/array_size.h include for ARRAY_SIZE macro usage - Remove linux/kernel.h and linux/mutex.h includes (no longer needed) - Remove mutex lock from struct adl8113_state (simplify concurrency model) - Add trailing comma to ADL8113_EXTERNAL_BYPASS_B enum value for consistency - Simplify adl8113_set_mode_enum() by removing mutex locking and direct ret= urn - Reorder case statements in adl8113_read_raw() for external bypass modes - Remove mutex locking from hardware gain reading operation - Remove adi,initial-mode device property support and related logic - Simplify probe function by removing initial_mode variable and property re= ading - Always initialize device to ADL8113_INTERNAL_AMPLIFIER mode - Remove device registration success message and simplify return logic - Fix of_device_id array formatting (spacing) drivers/iio/amplifiers/Kconfig | 12 ++ drivers/iio/amplifiers/Makefile | 1 + drivers/iio/amplifiers/adl8113.c | 213 +++++++++++++++++++++++++++++++ 3 files changed, 226 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. =20 +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/Makef= ile 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-$(CONFIG_AD8366) +=3D ad8366.o obj-$(CONFIG_ADA4250) +=3D ada4250.o +obj-$(CONFIG_ADL8113) +=3D adl8113.o obj-$(CONFIG_HMC425) +=3D hmc425a.o diff --git a/drivers/iio/amplifiers/adl8113.c b/drivers/iio/amplifiers/adl8= 113.c new file mode 100644 index 000000000000..8c234f0a1b6a --- /dev/null +++ b/drivers/iio/amplifiers/adl8113.c @@ -0,0 +1,213 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * ADL8113 Low Noise Amplifier with integrated bypass switches + * + * Copyright 2025 Analog Devices Inc. + */ + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +enum adl8113_mode { + ADL8113_INTERNAL_AMPLIFIER, + ADL8113_INTERNAL_BYPASS, + ADL8113_EXTERNAL_BYPASS_A, + ADL8113_EXTERNAL_BYPASS_B, +}; + +struct adl8113_state { + struct gpio_desc *gpio_va; + struct gpio_desc *gpio_vb; + enum adl8113_mode current_mode; +}; + +static const char * const adl8113_supply_names[] =3D { + "vdd1", + "vdd2", + "vss2" +}; + +static const char * const adl8113_mode_names[] =3D { + [ADL8113_INTERNAL_AMPLIFIER] =3D "internal_amplifier", + [ADL8113_INTERNAL_BYPASS] =3D "internal_bypass", + [ADL8113_EXTERNAL_BYPASS_A] =3D "external_bypass_a", + [ADL8113_EXTERNAL_BYPASS_B] =3D "external_bypass_b", +}; + +static int adl8113_set_mode(struct adl8113_state *st, enum adl8113_mode mo= de) +{ + 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 =3D mode; + return 0; +} + +static int adl8113_get_mode(struct iio_dev *indio_dev, + const struct iio_chan_spec *chan) +{ + struct adl8113_state *st =3D 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 =3D iio_priv(indio_dev); + + if (mode >=3D ARRAY_SIZE(adl8113_mode_names)) + return -EINVAL; + + return adl8113_set_mode(st, mode); +} + +static const struct iio_enum adl8113_mode_enum =3D { + .items =3D adl8113_mode_names, + .num_items =3D ARRAY_SIZE(adl8113_mode_names), + .get =3D adl8113_get_mode, + .set =3D adl8113_set_mode_enum, +}; + +static const struct iio_chan_spec_ext_info adl8113_ext_info[] =3D { + 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[] =3D { + { + .type =3D IIO_VOLTAGE, + .info_mask_shared_by_type =3D BIT(IIO_CHAN_INFO_HARDWAREGAIN), + .indexed =3D 1, + .channel =3D 0, + .ext_info =3D 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 =3D iio_priv(indio_dev); + int ret; + + switch (mask) { + case IIO_CHAN_INFO_HARDWAREGAIN: + switch (st->current_mode) { + case ADL8113_INTERNAL_AMPLIFIER: + *val =3D 14; + *val2 =3D 0; + ret =3D IIO_VAL_INT_PLUS_MICRO_DB; + break; + case ADL8113_INTERNAL_BYPASS: + *val =3D 0; + *val2 =3D 0; + ret =3D IIO_VAL_INT_PLUS_MICRO_DB; + break; + case ADL8113_EXTERNAL_BYPASS_A: + case ADL8113_EXTERNAL_BYPASS_B: + default: + ret =3D -EINVAL; + } + return ret; + default: + return -EINVAL; + } +} + +static const struct iio_info adl8113_info =3D { + .read_raw =3D adl8113_read_raw, +}; + +static int adl8113_probe(struct platform_device *pdev) +{ + struct device *dev =3D &pdev->dev; + struct adl8113_state *st; + struct iio_dev *indio_dev; + int ret; + + indio_dev =3D devm_iio_device_alloc(dev, sizeof(*st)); + if (!indio_dev) + return -ENOMEM; + + st =3D iio_priv(indio_dev); + + st->gpio_va =3D 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 =3D 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 =3D devm_regulator_bulk_get_enable(dev, ARRAY_SIZE(adl8113_supply_nam= es), + adl8113_supply_names); + if (ret) + return dev_err_probe(dev, ret, + "failed to get and enable supplies\n"); + + ret =3D adl8113_set_mode(st, ADL8113_INTERNAL_AMPLIFIER); + if (ret) + return ret; + + indio_dev->info =3D &adl8113_info; + indio_dev->name =3D "adl8113"; + indio_dev->channels =3D adl8113_channels; + indio_dev->num_channels =3D ARRAY_SIZE(adl8113_channels); + indio_dev->modes =3D INDIO_DIRECT_MODE; + + return devm_iio_device_register(dev, indio_dev); +} + +static const struct of_device_id adl8113_of_match[] =3D { + { .compatible =3D "adi,adl8113" }, + { } +}; +MODULE_DEVICE_TABLE(of, adl8113_of_match); + +static struct platform_driver adl8113_driver =3D { + .driver =3D { + .name =3D "adl8113", + .of_match_table =3D adl8113_of_match, + }, + .probe =3D adl8113_probe, +}; + +module_platform_driver(adl8113_driver); + +MODULE_AUTHOR("Antoniu Miclaus "); +MODULE_DESCRIPTION("Analog Devices ADL8113 Low Noise Amplifier"); +MODULE_LICENSE("GPL"); --=20 2.43.0