On Thu, 30 May 2019 16:18:12 +0300 Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> wrote: > The ADL5240 is a high performance, digitally controlled variable gain > amplifier (VGA) operating from 100 MHz to 4000 MHz. The VGA integrates a > high performance, 20 dB gain, internally matched amplifier (AMP) with a > 6-bit digital step attenuator (DSA) that has a gain control range of > 31.5 dB in 0.5 dB steps with ±0.25 dB step accuracy. > > Datasheet link: > https://www.analog.com/media/en/technical-documentation/data-sheets/adl5240.pdf > > Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> Applied to the togreg branch of iio.git and pushed out as testing for the autobuilders to play with it. Thanks, Jonathan > --- > drivers/iio/amplifiers/Kconfig | 1 + > drivers/iio/amplifiers/ad8366.c | 17 +++++++++++++++++ > 2 files changed, 18 insertions(+) > > diff --git a/drivers/iio/amplifiers/Kconfig b/drivers/iio/amplifiers/Kconfig > index 259058da8811..871e8060d996 100644 > --- a/drivers/iio/amplifiers/Kconfig > +++ b/drivers/iio/amplifiers/Kconfig > @@ -16,6 +16,7 @@ config AD8366 > from Analog Devices: > AD8366 Dual-Digital Variable Gain Amplifier (VGA) > ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) > + ADL5240 Digitally controlled variable gain amplifier (VGA) > > To compile this driver as a module, choose M here: the > module will be called ad8366. > diff --git a/drivers/iio/amplifiers/ad8366.c b/drivers/iio/amplifiers/ad8366.c > index 0a9883e8eb2e..0176d3d8cc9c 100644 > --- a/drivers/iio/amplifiers/ad8366.c > +++ b/drivers/iio/amplifiers/ad8366.c > @@ -4,6 +4,7 @@ > * This driver supports the following gain amplifiers: > * AD8366 Dual-Digital Variable Gain Amplifier (VGA) > * ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) > + * ADL5240 Digitally controlled variable gain amplifier (VGA) > * > * Copyright 2012-2019 Analog Devices Inc. > */ > @@ -25,6 +26,7 @@ > enum ad8366_type { > ID_AD8366, > ID_ADA4961, > + ID_ADL5240, > }; > > struct ad8366_info { > @@ -56,6 +58,10 @@ static struct ad8366_info ad8366_infos[] = { > .gain_min = -6000, > .gain_max = 15000, > }, > + [ID_ADL5240] = { > + .gain_min = -11500, > + .gain_max = 20000, > + }, > }; > > static int ad8366_write(struct iio_dev *indio_dev, > @@ -75,6 +81,9 @@ static int ad8366_write(struct iio_dev *indio_dev, > case ID_ADA4961: > st->data[0] = ch_a & 0x1F; > break; > + case ID_ADL5240: > + st->data[0] = (ch_a & 0x3F); > + break; > } > > ret = spi_write(st->spi, st->data, indio_dev->num_channels); > @@ -106,6 +115,9 @@ static int ad8366_read_raw(struct iio_dev *indio_dev, > case ID_ADA4961: > gain = 15000 - code * 1000; > break; > + case ID_ADL5240: > + gain = 20000 - 31500 + code * 500; > + break; > } > > /* Values in dB */ > @@ -149,6 +161,9 @@ static int ad8366_write_raw(struct iio_dev *indio_dev, > case ID_ADA4961: > code = (15000 - gain) / 1000; > break; > + case ID_ADL5240: > + code = ((gain - 500 - 20000) / 500) & 0x3F; > + break; > } > > mutex_lock(&st->lock); > @@ -217,6 +232,7 @@ static int ad8366_probe(struct spi_device *spi) > indio_dev->num_channels = ARRAY_SIZE(ad8366_channels); > break; > case ID_ADA4961: > + case ID_ADL5240: > st->reset_gpio = devm_gpiod_get(&spi->dev, "reset", > GPIOD_OUT_HIGH); > indio_dev->channels = ada4961_channels; > @@ -268,6 +284,7 @@ static int ad8366_remove(struct spi_device *spi) > static const struct spi_device_id ad8366_id[] = { > {"ad8366", ID_AD8366}, > {"ada4961", ID_ADA4961}, > + {"adl5240", ID_ADL5240}, > {} > }; > MODULE_DEVICE_TABLE(spi, ad8366_id);
