diff options
| author |   Alexandru Ardelean <alexandru.ardelean@analog.com> | 2019-05-30 16:18:12 +0300 |
|---|---|---|
| committer |   Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-06-17 21:06:48 +0100 |
| commit | 075da9cd6aa503e05c86f2bbd29b539d1b145644 (patch) | |
| tree | 2a93d71f81b2d2d8dff2f196eacd0e956fe2d929 /drivers/iio | |
| parent | iio: amplifiers: ad8366: Add support for the ADA4961 DGA (diff) | |
| download | linux-dev-075da9cd6aa503e05c86f2bbd29b539d1b145644.tar.xz linux-dev-075da9cd6aa503e05c86f2bbd29b539d1b145644.zip | |
iio: amplifiers: ad8366: Add support for ADL5240 VGA
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@analog.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/amplifiers/Kconfig | 1 | ||||
| -rw-r--r-- | drivers/iio/amplifiers/ad8366.c | 17 |
2 files changed, 18 insertions, 0 deletions
diff --git a/drivers/iio/amplifiers/Kconfig b/drivers/iio/amplifiers/Kconfig index f39c05677d52..da7f126d197b 100644 --- a/drivers/iio/amplifiers/Kconfig +++ b/drivers/iio/amplifiers/Kconfig @@ -17,6 +17,7 @@ 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); |