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staging:iio:ad7192: Add support for the AD7193

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The AD7193 is mostly register map compatible to the AD7192. The main
difference is that it has 8 instead of 4 inputs, so the way the input
channels are selected is slightly different.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Jonathan Cameron <jic23@kernel.org>
This commit is contained in:
Lars-Peter Clausen 2016-02-08 11:45:04 +01:00 committed by Jonathan Cameron
parent 9d452184fc
commit d69051b401
2 changed files with 63 additions and 17 deletions
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4
drivers/staging/iio/adc/Kconfig
View File

@ -58,12 +58,12 @@ config AD7816
temperature sensors and ADC.
config AD7192
tristate "Analog Devices AD7190 AD7192 AD7195 ADC driver"
tristate "Analog Devices AD7190 AD7192 AD7193 AD7195 ADC driver"
depends on SPI
select AD_SIGMA_DELTA
help
Say yes here to build support for Analog Devices AD7190,
AD7192 or AD7195 SPI analog to digital converters (ADC).
AD7192, AD7193 or AD7195 SPI analog to digital converters (ADC).
If unsure, say N (but it's safe to say "Y").
To compile this driver as a module, choose M here: the

76
drivers/staging/iio/adc/ad7192.c
View File

@ -1,7 +1,7 @@
/*
* AD7190 AD7192 AD7195 SPI ADC driver
* AD7190 AD7192 AD7193 AD7195 SPI ADC driver
*
* Copyright 2011-2012 Analog Devices Inc.
* Copyright 2011-2015 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
@ -92,26 +92,43 @@
#define AD7192_CONF_CHOP BIT(23) /* CHOP enable */
#define AD7192_CONF_REFSEL BIT(20) /* REFIN1/REFIN2 Reference Select */
#define AD7192_CONF_CHAN(x) (((1 << (x)) & 0xFF) << 8) /* Channel select */
#define AD7192_CONF_CHAN_MASK (0xFF << 8) /* Channel select mask */
#define AD7192_CONF_CHAN(x) ((x) << 8) /* Channel select */
#define AD7192_CONF_CHAN_MASK (0x7FF << 8) /* Channel select mask */
#define AD7192_CONF_BURN BIT(7) /* Burnout current enable */
#define AD7192_CONF_REFDET BIT(6) /* Reference detect enable */
#define AD7192_CONF_BUF BIT(4) /* Buffered Mode Enable */
#define AD7192_CONF_UNIPOLAR BIT(3) /* Unipolar/Bipolar Enable */
#define AD7192_CONF_GAIN(x) ((x) & 0x7) /* Gain Select */
#define AD7192_CH_AIN1P_AIN2M 0 /* AIN1(+) - AIN2(-) */
#define AD7192_CH_AIN3P_AIN4M 1 /* AIN3(+) - AIN4(-) */
#define AD7192_CH_TEMP 2 /* Temp Sensor */
#define AD7192_CH_AIN2P_AIN2M 3 /* AIN2(+) - AIN2(-) */
#define AD7192_CH_AIN1 4 /* AIN1 - AINCOM */
#define AD7192_CH_AIN2 5 /* AIN2 - AINCOM */
#define AD7192_CH_AIN3 6 /* AIN3 - AINCOM */
#define AD7192_CH_AIN4 7 /* AIN4 - AINCOM */
#define AD7192_CH_AIN1P_AIN2M BIT(0) /* AIN1(+) - AIN2(-) */
#define AD7192_CH_AIN3P_AIN4M BIT(1) /* AIN3(+) - AIN4(-) */
#define AD7192_CH_TEMP BIT(2) /* Temp Sensor */
#define AD7192_CH_AIN2P_AIN2M BIT(3) /* AIN2(+) - AIN2(-) */
#define AD7192_CH_AIN1 BIT(4) /* AIN1 - AINCOM */
#define AD7192_CH_AIN2 BIT(5) /* AIN2 - AINCOM */
#define AD7192_CH_AIN3 BIT(6) /* AIN3 - AINCOM */
#define AD7192_CH_AIN4 BIT(7) /* AIN4 - AINCOM */
#define AD7193_CH_AIN1P_AIN2M 0x000 /* AIN1(+) - AIN2(-) */
#define AD7193_CH_AIN3P_AIN4M 0x001 /* AIN3(+) - AIN4(-) */
#define AD7193_CH_AIN5P_AIN6M 0x002 /* AIN5(+) - AIN6(-) */
#define AD7193_CH_AIN7P_AIN8M 0x004 /* AIN7(+) - AIN8(-) */
#define AD7193_CH_TEMP 0x100 /* Temp senseor */
#define AD7193_CH_AIN2P_AIN2M 0x200 /* AIN2(+) - AIN2(-) */
#define AD7193_CH_AIN1 0x401 /* AIN1 - AINCOM */
#define AD7193_CH_AIN2 0x402 /* AIN2 - AINCOM */
#define AD7193_CH_AIN3 0x404 /* AIN3 - AINCOM */
#define AD7193_CH_AIN4 0x408 /* AIN4 - AINCOM */
#define AD7193_CH_AIN5 0x410 /* AIN5 - AINCOM */
#define AD7193_CH_AIN6 0x420 /* AIN6 - AINCOM */
#define AD7193_CH_AIN7 0x440 /* AIN7 - AINCOM */
#define AD7193_CH_AIN8 0x480 /* AIN7 - AINCOM */
#define AD7193_CH_AINCOM 0x600 /* AINCOM - AINCOM */
/* ID Register Bit Designations (AD7192_REG_ID) */
#define ID_AD7190 0x4
#define ID_AD7192 0x0
#define ID_AD7193 0x2
#define ID_AD7195 0x6
#define AD7192_ID_MASK 0x0F
@ -607,6 +624,24 @@ static const struct iio_chan_spec ad7192_channels[] = {
IIO_CHAN_SOFT_TIMESTAMP(8),
};
static const struct iio_chan_spec ad7193_channels[] = {
AD_SD_DIFF_CHANNEL(0, 1, 2, AD7193_CH_AIN1P_AIN2M, 24, 32, 0),
AD_SD_DIFF_CHANNEL(1, 3, 4, AD7193_CH_AIN3P_AIN4M, 24, 32, 0),
AD_SD_DIFF_CHANNEL(2, 5, 6, AD7193_CH_AIN5P_AIN6M, 24, 32, 0),
AD_SD_DIFF_CHANNEL(3, 7, 8, AD7193_CH_AIN7P_AIN8M, 24, 32, 0),
AD_SD_TEMP_CHANNEL(4, AD7193_CH_TEMP, 24, 32, 0),
AD_SD_SHORTED_CHANNEL(5, 2, AD7193_CH_AIN2P_AIN2M, 24, 32, 0),
AD_SD_CHANNEL(6, 1, AD7193_CH_AIN1, 24, 32, 0),
AD_SD_CHANNEL(7, 2, AD7193_CH_AIN2, 24, 32, 0),
AD_SD_CHANNEL(8, 3, AD7193_CH_AIN3, 24, 32, 0),
AD_SD_CHANNEL(9, 4, AD7193_CH_AIN4, 24, 32, 0),
AD_SD_CHANNEL(10, 5, AD7193_CH_AIN5, 24, 32, 0),
AD_SD_CHANNEL(11, 6, AD7193_CH_AIN6, 24, 32, 0),
AD_SD_CHANNEL(12, 7, AD7193_CH_AIN7, 24, 32, 0),
AD_SD_CHANNEL(13, 8, AD7193_CH_AIN8, 24, 32, 0),
IIO_CHAN_SOFT_TIMESTAMP(14),
};
static int ad7192_probe(struct spi_device *spi)
{
const struct ad7192_platform_data *pdata = dev_get_platdata(&spi->dev);
@ -651,8 +686,18 @@ static int ad7192_probe(struct spi_device *spi)
indio_dev->dev.parent = &spi->dev;
indio_dev->name = spi_get_device_id(spi)->name;
indio_dev->modes = INDIO_DIRECT_MODE;
indio_dev->channels = ad7192_channels;
indio_dev->num_channels = ARRAY_SIZE(ad7192_channels);
switch (st->devid) {
case ID_AD7193:
indio_dev->channels = ad7193_channels;
indio_dev->num_channels = ARRAY_SIZE(ad7193_channels);
break;
default:
indio_dev->channels = ad7192_channels;
indio_dev->num_channels = ARRAY_SIZE(ad7192_channels);
break;
}
if (st->devid == ID_AD7195)
indio_dev->info = &ad7195_info;
else
@ -699,6 +744,7 @@ static int ad7192_remove(struct spi_device *spi)
static const struct spi_device_id ad7192_id[] = {
{"ad7190", ID_AD7190},
{"ad7192", ID_AD7192},
{"ad7193", ID_AD7193},
{"ad7195", ID_AD7195},
{}
};
@ -715,5 +761,5 @@ static struct spi_driver ad7192_driver = {
module_spi_driver(ad7192_driver);
MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
MODULE_DESCRIPTION("Analog Devices AD7190, AD7192, AD7195 ADC");
MODULE_DESCRIPTION("Analog Devices AD7190, AD7192, AD7193, AD7195 ADC");
MODULE_LICENSE("GPL v2");