From ed73c4f13d5b63acce2b6f8c5e73c465479c4940 Mon Sep 17 00:00:00 2001 From: Ana-Maria Cusco Date: Mon, 13 Nov 2023 12:25:34 +0200 Subject: iio: amplifiers: hmc425a: add support for ADRF5740 Attenuator This adds support for the Analog Devices ADRF5740 2 dB LSB, 4-Bit, Silicon Digital Attenuator, 10 MHz to 60 GHz. The default (maximum) gain is also set at probe time, with GPIO lines driven high to achieve maximum gain, in contrast to other devices where GPIOs need to be driven low. Signed-off-by: Ana-Maria Cusco Link: https://lore.kernel.org/r/20231113102535.51074-2-anamaria.cuscoo@gmail.com Signed-off-by: Jonathan Cameron --- drivers/iio/amplifiers/hmc425a.c | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'drivers/iio/amplifiers') diff --git a/drivers/iio/amplifiers/hmc425a.c b/drivers/iio/amplifiers/hmc425a.c index e87d35d50a95..ed4d72922696 100644 --- a/drivers/iio/amplifiers/hmc425a.c +++ b/drivers/iio/amplifiers/hmc425a.c @@ -5,6 +5,7 @@ * Copyright 2020 Analog Devices Inc. */ +#include #include #include #include @@ -22,6 +23,7 @@ enum hmc425a_type { ID_HMC425A, ID_HMC540S, + ID_ADRF5740 }; struct hmc425a_chip_info { @@ -74,6 +76,10 @@ static int hmc425a_read_raw(struct iio_dev *indio_dev, case ID_HMC540S: gain = ~code * -1000; break; + case ID_ADRF5740: + code = code & BIT(3) ? code & ~BIT(2) : code; + gain = code * -2000; + break; } *val = gain / 1000; @@ -113,6 +119,10 @@ static int hmc425a_write_raw(struct iio_dev *indio_dev, case ID_HMC540S: code = ~((abs(gain) / 1000) & 0xF); break; + case ID_ADRF5740: + code = (abs(gain) / 2000) & 0xF; + code = code & BIT(3) ? code | BIT(2) : code; + break; } mutex_lock(&st->lock); @@ -165,6 +175,7 @@ static const struct iio_chan_spec hmc425a_channels[] = { static const struct of_device_id hmc425a_of_match[] = { { .compatible = "adi,hmc425a", .data = (void *)ID_HMC425A }, { .compatible = "adi,hmc540s", .data = (void *)ID_HMC540S }, + { .compatible = "adi,adrf5740", .data = (void *)ID_ADRF5740 }, {}, }; MODULE_DEVICE_TABLE(of, hmc425a_of_match); @@ -188,6 +199,15 @@ static struct hmc425a_chip_info hmc425a_chip_info_tbl[] = { .gain_max = 0, .default_gain = -0x10, /* set default gain -15.0db*/ }, + [ID_ADRF5740] = { + .name = "adrf5740", + .channels = hmc425a_channels, + .num_channels = ARRAY_SIZE(hmc425a_channels), + .num_gpios = 4, + .gain_min = -22000, + .gain_max = 0, + .default_gain = 0xF, /* set default gain -22.0db*/ + }, }; static int hmc425a_probe(struct platform_device *pdev) @@ -229,6 +249,9 @@ static int hmc425a_probe(struct platform_device *pdev) indio_dev->info = &hmc425a_info; indio_dev->modes = INDIO_DIRECT_MODE; + /* Set default gain */ + hmc425a_write(indio_dev, st->gain); + return devm_iio_device_register(&pdev->dev, indio_dev); } -- cgit v1.2.3