linux.git/drivers/iio/amplifiers, branch master

iio: amplifiers: ad8366: add support for adrf5702/3

2026-03-26T20:10:26+00:00

Add chip info structs and device table entries for ADRF5702 and ADRF5703
Digital Step Attenuators.

Reviewed-by: Nuno Sá 
Signed-off-by: Rodrigo Alencar 
Signed-off-by: Jonathan Cameron

iio: amplifiers: fix typo from Curren to Current

2026-03-21T19:30:24+00:00

Fix incorrect spelling from Curren to Current.

Signed-off-by: Shi Hao 
Signed-off-by: Jonathan Cameron

iio: amplifiers: ad8366: update device support

2026-02-23T21:00:58+00:00

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 
Signed-off-by: Alexandru Ardelean 
Co-developed-by: Michael Hennerich 
Signed-off-by: Michael Hennerich 
Reviewed-by: Andy Shevchenko 
Signed-off-by: Rodrigo Alencar 
Signed-off-by: Jonathan Cameron

iio: amplifiers: ad8366: consume enable gpio

2026-02-23T21:00:58+00:00

Some parts may consume enable GPIO to enable serial mode
(HMC1119's and HMC792A P/S pin) or powerup the device
(e.g. ADA4961's PWUP pin).

Signed-off-by: Rodrigo Alencar 
Signed-off-by: Jonathan Cameron

iio: amplifiers: ad8366: add device tree support

2026-02-23T21:00:58+00:00

Drop the enum ID, split chip info table into per-device structs and add
of_match_table. Additionally, add 'name' field into the chip info struct,
dropping the usage of spi_get_device_id().

Signed-off-by: Rodrigo Alencar 
Signed-off-by: Jonathan Cameron

iio: amplifiers: ad8366: prepare for device-tree support

2026-02-23T21:00:58+00:00

Drop switch case on the enum ID in favor of extended chip info table,
containing:
- gain_step, indicating with sign the start of the code range;
- num_channels, to indicate the number IIO channels;
- pack_code() function to describe how SPI buffer is populated;

Which allowed for a simplified read_raw() and write_raw() callbacks. The
probe() function was adjusted accordingly. The linux/array_size.h include
is removed as number of channels is provided by chip info table.

Signed-off-by: Rodrigo Alencar 
Signed-off-by: Jonathan Cameron

iio: amplifiers: ad8366: replace reset-gpio with reset controller

2026-02-23T21:00:58+00:00

Remove reset_gpio from the device state struct and use the reset_control
interface instead, using a local variable, as it is not being used
anywhere else. The reset controller init is moved out from the switch case
and optionally initialized for every device variant. Although not all
devices have a reset pin the code does not need to change if it is not
wired.

Signed-off-by: Rodrigo Alencar 
Signed-off-by: Jonathan Cameron

iio: amplifiers: ad8366: refactor device resource management

2026-02-23T21:00:57+00:00

Adhere modern device resource management with the following:
- Voltage regulator managed and enabled internally;
- IIO device registration handled with devm_iio_device_register();
- removal of goto's from the probe function;
- ad8366_remove() removed as it is not needed anymore;

With the drop of goto's dev_err_probe() is used to report probe errors.

Signed-off-by: Rodrigo Alencar 
Signed-off-by: Jonathan Cameron

iio: amplifiers: ad8366: use devm_mutex_init() and drop mutex_init()

2026-02-23T21:00:57+00:00

Adopt proper mutex lifecycle with devm_mutex_init(), replacing
mutex_init(). Mutex init is moved up (before regulator init),
so that goto statement in the error path is avoided (which will
be cleaned up later).

Signed-off-by: Rodrigo Alencar 
Signed-off-by: Jonathan Cameron

iio: amplifiers: ad8366: add local dev pointer to the probe function

2026-02-23T21:00:57+00:00

Create local device pointer in the probe function to shorten lines, making
the code easier to read. The local device pointer replaces &spi->dev and
will be reused across other probe function places in later patches.

Signed-off-by: Rodrigo Alencar 
Signed-off-by: Jonathan Cameron