This change adds support for the HMC792A Digital Attenuator. The HMC792A is a broadband 6-bit GaAs MMIC Digital Attenuator operating from DC to 6.0 GHz with 15.75 dB attenuation control range in 0.25 dB steps. Datasheet link: https://www.analog.com/media/en/technical-documentation/data-sheets/hmc792a.pdf Signed-off-by: Kim Seer Paller <kimseer.paller@xxxxxxxxxx> --- drivers/iio/amplifiers/Kconfig | 1 + drivers/iio/amplifiers/ad8366.c | 15 +++++++++++++++ 2 files changed, 16 insertions(+) diff --git a/drivers/iio/amplifiers/Kconfig b/drivers/iio/amplifiers/Kconfig index f217a2a1e..b54fe0173 100644 --- a/drivers/iio/amplifiers/Kconfig +++ b/drivers/iio/amplifiers/Kconfig @@ -18,6 +18,7 @@ config AD8366 AD8366 Dual-Digital Variable Gain Amplifier (VGA) ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) ADL5240 Digitally controlled variable gain amplifier (VGA) + HMC792A 0.25 dB LSB GaAs MMIC 6-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 8d8c8ea94..31564afb1 100644 --- a/drivers/iio/amplifiers/ad8366.c +++ b/drivers/iio/amplifiers/ad8366.c @@ -5,6 +5,7 @@ * AD8366 Dual-Digital Variable Gain Amplifier (VGA) * ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) * ADL5240 Digitally controlled variable gain amplifier (VGA) + * HMC792A 0.25 dB LSB GaAs MMIC 6-Bit Digital Attenuator * HMC1119 0.25 dB LSB, 7-Bit, Silicon Digital Attenuator * * Copyright 2012-2019 Analog Devices Inc. @@ -28,6 +29,7 @@ enum ad8366_type { ID_AD8366, ID_ADA4961, ID_ADL5240, + ID_HMC792, ID_HMC1119, }; @@ -64,6 +66,10 @@ static struct ad8366_info ad8366_infos[] = { .gain_min = -11500, .gain_max = 20000, }, + [ID_HMC792] = { + .gain_min = -15750, + .gain_max = 0, + }, [ID_HMC1119] = { .gain_min = -31750, .gain_max = 0, @@ -90,6 +96,7 @@ static int ad8366_write(struct iio_dev *indio_dev, case ID_ADL5240: st->data[0] = (ch_a & 0x3F); break; + case ID_HMC792: case ID_HMC1119: st->data[0] = ch_a; break; @@ -127,6 +134,9 @@ static int ad8366_read_raw(struct iio_dev *indio_dev, case ID_ADL5240: gain = 20000 - 31500 + code * 500; break; + case ID_HMC792: + gain = -1 * code * 500; + break; case ID_HMC1119: gain = -1 * code * 250; break; @@ -176,6 +186,9 @@ static int ad8366_write_raw(struct iio_dev *indio_dev, case ID_ADL5240: code = ((gain - 500 - 20000) / 500) & 0x3F; break; + case ID_HMC792: + code = (abs(gain) / 500) & 0x3F; + break; case ID_HMC1119: code = (abs(gain) / 250) & 0x7F; break; @@ -261,6 +274,7 @@ static int ad8366_probe(struct spi_device *spi) break; case ID_ADA4961: case ID_ADL5240: + case ID_HMC792: case ID_HMC1119: st->reset_gpio = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_HIGH); if (IS_ERR(st->reset_gpio)) { @@ -314,6 +328,7 @@ static const struct spi_device_id ad8366_id[] = { {"ad8366", ID_AD8366}, {"ada4961", ID_ADA4961}, {"adl5240", ID_ADL5240}, + {"hmc792a", ID_HMC792}, {"hmc1119", ID_HMC1119}, {} }; base-commit: f7e3a1bafdea735050dfde00523cf505dc7fd309 -- 2.34.1
