diff options
| author | Lars-Peter Clausen <lars@metafoo.de> | 2012-09-10 09:34:00 +0100 |
|---|---|---|
| committer | Jonathan Cameron <jic23@kernel.org> | 2012-09-15 10:02:15 +0100 |
| commit | 4c337de870d9bd1459ab603574256bb0e7644ad6 (patch) | |
| tree | 1247ed98864855a526e78622b6c25b1381542a98 /drivers/iio | |
| parent | ac5332b1475b474a478d9336635849339546e235 (diff) | |
| download | linux-4c337de870d9bd1459ab603574256bb0e7644ad6.tar.gz | |
iio:ad7476: Add ad7940 support
The AD7940 is a single channel 14 bit ADC similar to the ADCs already supported by the ad7476 driver, but it does have a different shift factor. Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/Kconfig | 4 | ||||
| -rw-r--r-- | drivers/iio/adc/ad7476.c | 18 |
2 files changed, 16 insertions, 6 deletions
diff --git a/drivers/iio/adc/Kconfig b/drivers/iio/adc/Kconfig index c71a0009cc79..e2e696395ac8 100644 --- a/drivers/iio/adc/Kconfig +++ b/drivers/iio/adc/Kconfig @@ -37,8 +37,8 @@ config AD7476 select IIO_TRIGGERED_BUFFER help Say yes here to build support for Analog Devices AD7475, AD7476, AD7477, - AD7478, AD7466, AD7467, AD7468, AD7495, AD7910, AD7920 SPI analog to - digital converters (ADC). + AD7478, AD7466, AD7467, AD7468, AD7495, AD7910, AD7920, AD7920 SPI analog + to digital converters (ADC). If unsure, say N (but it's safe to say "Y"). diff --git a/drivers/iio/adc/ad7476.c b/drivers/iio/adc/ad7476.c index 093a4ed900d8..be22757d54e4 100644 --- a/drivers/iio/adc/ad7476.c +++ b/drivers/iio/adc/ad7476.c @@ -48,7 +48,8 @@ enum ad7476_supported_device_ids { ID_AD7466, ID_AD7467, ID_AD7468, - ID_AD7495 + ID_AD7495, + ID_AD7940, }; static irqreturn_t ad7476_trigger_handler(int irq, void *p) @@ -126,7 +127,7 @@ static int ad7476_read_raw(struct iio_dev *indio_dev, return -EINVAL; } -#define AD7476_CHAN(bits) \ +#define _AD7476_CHAN(bits, _shift) \ { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ @@ -134,12 +135,16 @@ static int ad7476_read_raw(struct iio_dev *indio_dev, IIO_CHAN_INFO_SCALE_SHARED_BIT, \ .scan_type = { \ .sign = 'u', \ - .realbits = bits, \ + .realbits = (bits), \ .storagebits = 16, \ - .shift = 13 - bits, \ + .shift = (_shift), \ + .endianness = IIO_BE, \ }, \ } +#define AD7476_CHAN(bits) _AD7476_CHAN((bits), 13 - (bits)) +#define AD7940_CHAN(bits) _AD7476_CHAN((bits), 15 - (bits)) + static const struct ad7476_chip_info ad7476_chip_info_tbl[] = { [ID_AD7466] = { .channel[0] = AD7476_CHAN(12), @@ -158,6 +163,10 @@ static const struct ad7476_chip_info ad7476_chip_info_tbl[] = { .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), .int_vref_uv = 2500000, }, + [ID_AD7940] = { + .channel[0] = AD7940_CHAN(14), + .channel[1] = IIO_CHAN_SOFT_TIMESTAMP(1), + }, }; static const struct iio_info ad7476_info = { @@ -260,6 +269,7 @@ static const struct spi_device_id ad7476_id[] = { {"ad7495", ID_AD7495}, {"ad7910", ID_AD7467}, {"ad7920", ID_AD7466}, + {"ad7940", ID_AD7940}, {} }; MODULE_DEVICE_TABLE(spi, ad7476_id); |