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iio: adc: ad7476: Add support for TI ADS786X ADCs 

Add support for Texas Instruments ADS7866, ADS7867 and ADS7868
8/10/12 bit Single channel ADC.

Datasheet: http://www.ti.com/lit/ds/symlink/ads7868.pdf

Signed-off-by: Ricardo Ribalda Delgado <ricardo@ribalda.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Ricardo Ribalda Delgado 2019-02-04 13:44:41 +01:00 committed by Jonathan Cameron
parent e9517dffd1
commit 77c5a7f5c1
2 changed files with 27 additions and 4 deletions
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11
drivers/iio/adc/Kconfig
View File

@ -57,14 +57,17 @@ config AD7298
module will be called ad7298.
config AD7476
tristate "Analog Devices AD7476 and similar 1-channel ADCs driver"
tristate "Analog Devices AD7476 1-channel ADCs driver and other similar devices from AD an TI"
depends on SPI
select IIO_BUFFER
select IIO_TRIGGERED_BUFFER
help
Say yes here to build support for Analog Devices AD7273, AD7274, AD7276,
AD7277, AD7278, AD7475, AD7476, AD7477, AD7478, AD7466, AD7467, AD7468,
AD7495, AD7910, AD7920, AD7920 SPI analog to digital converters (ADC).
Say yes here to build support for the following SPI analog to
digital converters (ADCs):
Analog Devices: AD7273, AD7274, AD7276, AD7277, AD7278, AD7475,
AD7476, AD7477, AD7478, AD7466, AD7467, AD7468, AD7495, AD7910,
AD7920.
Texas Instruments: ADS7866, ADS7867, ADS7868.
To compile this driver as a module, choose M here: the
module will be called ad7476.

20
drivers/iio/adc/ad7476.c
View File

@ -59,6 +59,9 @@ enum ad7476_supported_device_ids {
ID_ADC081S,
ID_ADC101S,
ID_ADC121S,
ID_ADS7866,
ID_ADS7867,
ID_ADS7868,
};
static irqreturn_t ad7476_trigger_handler(int irq, void *p)
@ -157,6 +160,8 @@ static int ad7476_read_raw(struct iio_dev *indio_dev,
#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits), \
BIT(IIO_CHAN_INFO_RAW))
#define AD7091R_CHAN(bits) _AD7476_CHAN((bits), 16 - (bits), 0)
#define ADS786X_CHAN(bits) _AD7476_CHAN((bits), 12 - (bits), \
BIT(IIO_CHAN_INFO_RAW))
static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
[ID_AD7091R] = {
@ -209,6 +214,18 @@ static const struct ad7476_chip_info ad7476_chip_info_tbl[] = {
.channel[0] = ADC081S_CHAN(12),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_ADS7866] = {
.channel[0] = ADS786X_CHAN(12),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_ADS7867] = {
.channel[0] = ADS786X_CHAN(10),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
[ID_ADS7868] = {
.channel[0] = ADS786X_CHAN(8),
.channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1),
},
};
static const struct iio_info ad7476_info = {
@ -314,6 +331,9 @@ static const struct spi_device_id ad7476_id[] = {
{"adc081s", ID_ADC081S},
{"adc101s", ID_ADC101S},
{"adc121s", ID_ADC121S},
{"ads7866", ID_ADS7866},
{"ads7867", ID_ADS7867},
{"ads7868", ID_ADS7868},
{}
};
MODULE_DEVICE_TABLE(spi, ad7476_id);