On Sat, Jun 8, 2019 at 5:05 PM Jonathan Cameron <jic23@xxxxxxxxxxxxxxxxxxxxx> wrote: > > On Thu, 30 May 2019 16:18:11 +0300 > Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> wrote: > > > From: Paul Cercueil <paul.cercueil@xxxxxxxxxx> > > > > This change adds support for the ADA4961 BiCMOS RF Digital Gain Amplifier, > > (DGA), which is optimized for driving heavy loads out 2.0 GHz and beyond. > > The device typically achieves -90 dBc IMD3 performance at 500 MHz and > > -85 dBc at 1.5 GHz. > > > > Datasheet link: > > http://www.analog.com/media/en/technical-documentation/data-sheets/ADA4961.pdf > > > > This change re-uses the existing ad8366 driver, as most logic is similar. > > Also, this chip has a reset pin which is initialized during probe. > > > > Signed-off-by: Paul Cercueil <paul.cercueil@xxxxxxxxxx> > > Signed-off-by: Michael Hennerich <michael.hennerich@xxxxxxxxxx> > > Signed-off-by: Alexandru Ardelean <alexandru.ardelean@xxxxxxxxxx> > > I'm fairly sure you want a GPIOLIB kconfig dependency. > I've added it rather than going for a v2 for just that. > Give me a shout if it's not actually required! > > Applied to the togreg branch of iio.git and pushed out as testing > for the autobuilders to play with it. > oops thanks for catching this Alex > Thanks, > > Jonathan > > > --- > > drivers/iio/amplifiers/Kconfig | 9 ++++++--- > > drivers/iio/amplifiers/ad8366.c | 34 +++++++++++++++++++++++++++++++-- > > 2 files changed, 38 insertions(+), 5 deletions(-) > > > > diff --git a/drivers/iio/amplifiers/Kconfig b/drivers/iio/amplifiers/Kconfig > > index da5830da9bcf..259058da8811 100644 > > --- a/drivers/iio/amplifiers/Kconfig > > +++ b/drivers/iio/amplifiers/Kconfig > > @@ -7,12 +7,15 @@ > > menu "Amplifiers" > > > > config AD8366 > > - tristate "Analog Devices AD8366 VGA" > > + tristate "Analog Devices AD8366 and similar Gain Amplifiers" > > depends on SPI > > select BITREVERSE > > help > > - Say yes here to build support for Analog Devices AD8366 > > - SPI Dual-Digital Variable Gain Amplifier (VGA). > > + Say yes here to build support for Analog Devices AD8366 and similar > > + gain amplifiers. This driver supports the following gain amplifiers > > + from Analog Devices: > > + AD8366 Dual-Digital Variable Gain Amplifier (VGA) > > + ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) > > > > 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 1beda6409301..0a9883e8eb2e 100644 > > --- a/drivers/iio/amplifiers/ad8366.c > > +++ b/drivers/iio/amplifiers/ad8366.c > > @@ -1,6 +1,9 @@ > > // SPDX-License-Identifier: GPL-2.0 > > /* > > - * AD8366 SPI Dual-Digital Variable Gain Amplifier (VGA) > > + * AD8366 and similar Gain Amplifiers > > + * This driver supports the following gain amplifiers: > > + * AD8366 Dual-Digital Variable Gain Amplifier (VGA) > > + * ADA4961 BiCMOS RF Digital Gain Amplifier (DGA) > > * > > * Copyright 2012-2019 Analog Devices Inc. > > */ > > @@ -11,6 +14,7 @@ > > #include <linux/sysfs.h> > > #include <linux/spi/spi.h> > > #include <linux/regulator/consumer.h> > > +#include <linux/gpio/consumer.h> > I'd be highly surprised if this didn't need a KCONFIG dependency > change... > > > #include <linux/err.h> > > #include <linux/module.h> > > #include <linux/bitrev.h> > > @@ -20,6 +24,7 @@ > > > > enum ad8366_type { > > ID_AD8366, > > + ID_ADA4961, > > }; > > > > struct ad8366_info { > > @@ -31,6 +36,7 @@ struct ad8366_state { > > struct spi_device *spi; > > struct regulator *reg; > > struct mutex lock; /* protect sensor state */ > > + struct gpio_desc *reset_gpio; > > unsigned char ch[2]; > > enum ad8366_type type; > > struct ad8366_info *info; > > @@ -46,6 +52,10 @@ static struct ad8366_info ad8366_infos[] = { > > .gain_min = 4500, > > .gain_max = 20500, > > }, > > + [ID_ADA4961] = { > > + .gain_min = -6000, > > + .gain_max = 15000, > > + }, > > }; > > > > static int ad8366_write(struct iio_dev *indio_dev, > > @@ -62,6 +72,9 @@ static int ad8366_write(struct iio_dev *indio_dev, > > st->data[0] = ch_b >> 4; > > st->data[1] = (ch_b << 4) | (ch_a >> 2); > > break; > > + case ID_ADA4961: > > + st->data[0] = ch_a & 0x1F; > > + break; > > } > > > > ret = spi_write(st->spi, st->data, indio_dev->num_channels); > > @@ -90,6 +103,9 @@ static int ad8366_read_raw(struct iio_dev *indio_dev, > > case ID_AD8366: > > gain = code * 253 + 4500; > > break; > > + case ID_ADA4961: > > + gain = 15000 - code * 1000; > > + break; > > } > > > > /* Values in dB */ > > @@ -130,6 +146,9 @@ static int ad8366_write_raw(struct iio_dev *indio_dev, > > case ID_AD8366: > > code = (gain - 4500) / 253; > > break; > > + case ID_ADA4961: > > + code = (15000 - gain) / 1000; > > + break; > > } > > > > mutex_lock(&st->lock); > > @@ -164,6 +183,10 @@ static const struct iio_chan_spec ad8366_channels[] = { > > AD8366_CHAN(1), > > }; > > > > +static const struct iio_chan_spec ada4961_channels[] = { > > + AD8366_CHAN(0), > > +}; > > + > > static int ad8366_probe(struct spi_device *spi) > > { > > struct iio_dev *indio_dev; > > @@ -193,6 +216,12 @@ static int ad8366_probe(struct spi_device *spi) > > indio_dev->channels = ad8366_channels; > > indio_dev->num_channels = ARRAY_SIZE(ad8366_channels); > > break; > > + case ID_ADA4961: > > + st->reset_gpio = devm_gpiod_get(&spi->dev, "reset", > > + GPIOD_OUT_HIGH); > > + indio_dev->channels = ada4961_channels; > > + indio_dev->num_channels = ARRAY_SIZE(ada4961_channels); > > + break; > > default: > > dev_err(&spi->dev, "Invalid device ID\n"); > > ret = -EINVAL; > > @@ -238,6 +267,7 @@ static int ad8366_remove(struct spi_device *spi) > > > > static const struct spi_device_id ad8366_id[] = { > > {"ad8366", ID_AD8366}, > > + {"ada4961", ID_ADA4961}, > > {} > > }; > > MODULE_DEVICE_TABLE(spi, ad8366_id); > > @@ -254,5 +284,5 @@ static struct spi_driver ad8366_driver = { > > module_spi_driver(ad8366_driver); > > > > MODULE_AUTHOR("Michael Hennerich <michael.hennerich@xxxxxxxxxx>"); > > -MODULE_DESCRIPTION("Analog Devices AD8366 VGA"); > > +MODULE_DESCRIPTION("Analog Devices AD8366 and similar Gain Amplifiers"); > > MODULE_LICENSE("GPL v2"); >
