staging:iio:ad7793: Add support for ad7794/ad7795
The ad7794/ad7795 are similar to the ad7792/ad7793, but have 6 channels instead of 3. 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
Jonathan Cameron
parent
3f7c3306cf
commit
525e643e48
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@ -109,12 +109,12 @@ config AD7780
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module will be called ad7780.
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config AD7793
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tristate "Analog Devices AD7792 AD7793 ADC driver"
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tristate "Analog Devices AD7793 and similar ADCs driver"
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depends on SPI
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select AD_SIGMA_DELTA
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help
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Say yes here to build support for Analog Devices
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AD7792 and AD7793 SPI analog to digital converters (ADC).
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Say yes here to build support for Analog Devices AD7792, AD7793, AD7794
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and AD7795 SPI analog to digital converters (ADC).
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If unsure, say N (but it's safe to say "Y").
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To compile this driver as a module, choose M here: the
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@ -1,5 +1,5 @@
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/*
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* AD7792/AD7793 SPI ADC driver
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* AD7792/AD7793/AD7794/AD7795 SPI ADC driver
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*
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* Copyright 2011-2012 Analog Devices Inc.
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*
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@ -37,7 +37,8 @@
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*/
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struct ad7793_chip_info {
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struct iio_chan_spec channel[7];
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const struct iio_chan_spec *channels;
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unsigned int num_channels;
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};
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struct ad7793_state {
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@ -55,6 +56,8 @@ struct ad7793_state {
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enum ad7793_supported_device_ids {
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ID_AD7792,
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ID_AD7793,
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ID_AD7794,
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ID_AD7795,
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};
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static struct ad7793_state *ad_sigma_delta_to_ad7793(struct ad_sigma_delta *sd)
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@ -127,7 +130,7 @@ static int ad7793_setup(struct iio_dev *indio_dev,
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id &= AD7793_ID_MASK;
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if (!((id == AD7792_ID) || (id == AD7793_ID))) {
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if (!((id == AD7792_ID) || (id == AD7793_ID) || (id == AD7795_ID))) {
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dev_err(&st->sd.spi->dev, "device ID query failed\n");
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goto out;
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}
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@ -155,7 +158,7 @@ static int ad7793_setup(struct iio_dev *indio_dev,
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/* Populate available ADC input ranges */
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for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++) {
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scale_uv = ((u64)st->int_vref_mv * 100000000)
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>> (st->chip_info->channel[0].scan_type.realbits -
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>> (st->chip_info->channels[0].scan_type.realbits -
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(!!(st->conf & AD7793_CONF_UNIPOLAR) ? 0 : 1));
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scale_uv >>= i;
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@ -383,28 +386,52 @@ static const struct iio_info ad7793_info = {
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.driver_module = THIS_MODULE,
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};
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#define DECLARE_AD7793_CHANNELS(_name, _b, _sb) \
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const struct iio_chan_spec _name##_channels[] = { \
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AD_SD_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, (_b), (_sb), 0), \
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AD_SD_DIFF_CHANNEL(1, 1, 1, AD7793_CH_AIN2P_AIN2M, (_b), (_sb), 0), \
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AD_SD_DIFF_CHANNEL(2, 2, 2, AD7793_CH_AIN3P_AIN3M, (_b), (_sb), 0), \
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AD_SD_SHORTED_CHANNEL(3, 0, AD7793_CH_AIN1M_AIN1M, (_b), (_sb), 0), \
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AD_SD_TEMP_CHANNEL(4, AD7793_CH_TEMP, (_b), (_sb), 0), \
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AD_SD_SUPPLY_CHANNEL(5, 3, AD7793_CH_AVDD_MONITOR, (_b), (_sb), 0), \
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IIO_CHAN_SOFT_TIMESTAMP(6), \
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}
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#define DECLARE_AD7795_CHANNELS(_name, _b, _sb) \
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const struct iio_chan_spec _name##_channels[] = { \
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AD_SD_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, (_b), (_sb), 0), \
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AD_SD_DIFF_CHANNEL(1, 1, 1, AD7793_CH_AIN2P_AIN2M, (_b), (_sb), 0), \
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AD_SD_DIFF_CHANNEL(2, 2, 2, AD7793_CH_AIN3P_AIN3M, (_b), (_sb), 0), \
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AD_SD_DIFF_CHANNEL(3, 3, 3, AD7795_CH_AIN4P_AIN4M, (_b), (_sb), 0), \
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AD_SD_DIFF_CHANNEL(4, 4, 4, AD7795_CH_AIN5P_AIN5M, (_b), (_sb), 0), \
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AD_SD_DIFF_CHANNEL(5, 5, 5, AD7795_CH_AIN6P_AIN6M, (_b), (_sb), 0), \
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AD_SD_SHORTED_CHANNEL(6, 0, AD7795_CH_AIN1M_AIN1M, (_b), (_sb), 0), \
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AD_SD_TEMP_CHANNEL(7, AD7793_CH_TEMP, (_b), (_sb), 0), \
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AD_SD_SUPPLY_CHANNEL(8, 3, AD7793_CH_AVDD_MONITOR, (_b), (_sb), 0), \
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IIO_CHAN_SOFT_TIMESTAMP(9), \
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}
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static DECLARE_AD7793_CHANNELS(ad7792, 16, 32);
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static DECLARE_AD7793_CHANNELS(ad7793, 24, 32);
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static DECLARE_AD7795_CHANNELS(ad7794, 16, 32);
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static DECLARE_AD7795_CHANNELS(ad7795, 24, 32);
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static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
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[ID_AD7793] = {
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.channel = {
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AD_SD_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, 24, 32, 0),
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AD_SD_DIFF_CHANNEL(1, 1, 1, AD7793_CH_AIN2P_AIN2M, 24, 32, 0),
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AD_SD_DIFF_CHANNEL(2, 2, 2, AD7793_CH_AIN3P_AIN3M, 24, 32, 0),
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AD_SD_SHORTED_CHANNEL(3, 0, AD7793_CH_AIN1M_AIN1M, 24, 32, 0),
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AD_SD_TEMP_CHANNEL(4, AD7793_CH_TEMP, 24, 32, 0),
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AD_SD_SUPPLY_CHANNEL(5, 3, AD7793_CH_AVDD_MONITOR, 24, 32, 0),
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IIO_CHAN_SOFT_TIMESTAMP(6),
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},
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},
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[ID_AD7792] = {
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.channel = {
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AD_SD_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, 16, 32, 0),
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AD_SD_DIFF_CHANNEL(1, 1, 1, AD7793_CH_AIN2P_AIN2M, 16, 32, 0),
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AD_SD_DIFF_CHANNEL(2, 2, 2, AD7793_CH_AIN3P_AIN3M, 16, 32, 0),
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AD_SD_SHORTED_CHANNEL(3, 0, AD7793_CH_AIN1M_AIN1M, 16, 32, 0),
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AD_SD_TEMP_CHANNEL(4, AD7793_CH_TEMP, 16, 32, 0),
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AD_SD_SUPPLY_CHANNEL(5, 3, AD7793_CH_AVDD_MONITOR, 16, 32, 0),
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IIO_CHAN_SOFT_TIMESTAMP(6),
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},
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.channels = ad7792_channels,
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.num_channels = ARRAY_SIZE(ad7792_channels),
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},
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[ID_AD7793] = {
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.channels = ad7793_channels,
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.num_channels = ARRAY_SIZE(ad7793_channels),
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},
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[ID_AD7794] = {
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.channels = ad7794_channels,
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.num_channels = ARRAY_SIZE(ad7794_channels),
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},
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[ID_AD7795] = {
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.channels = ad7795_channels,
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.num_channels = ARRAY_SIZE(ad7795_channels),
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},
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};
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@ -457,8 +484,8 @@ static int __devinit ad7793_probe(struct spi_device *spi)
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indio_dev->dev.parent = &spi->dev;
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indio_dev->name = spi_get_device_id(spi)->name;
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indio_dev->modes = INDIO_DIRECT_MODE;
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indio_dev->channels = st->chip_info->channel;
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indio_dev->num_channels = 7;
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indio_dev->channels = st->chip_info->channels;
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indio_dev->num_channels = st->chip_info->num_channels;
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indio_dev->info = &ad7793_info;
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ret = ad_sd_setup_buffer_and_trigger(indio_dev);
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@ -510,6 +537,8 @@ static int ad7793_remove(struct spi_device *spi)
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static const struct spi_device_id ad7793_id[] = {
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{"ad7792", ID_AD7792},
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{"ad7793", ID_AD7793},
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{"ad7794", ID_AD7794},
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{"ad7795", ID_AD7795},
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{}
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};
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MODULE_DEVICE_TABLE(spi, ad7793_id);
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@ -526,5 +555,5 @@ static struct spi_driver ad7793_driver = {
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module_spi_driver(ad7793_driver);
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MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>");
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MODULE_DESCRIPTION("Analog Devices AD7792/3 ADC");
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MODULE_DESCRIPTION("Analog Devices AD7793 and simialr ADCs");
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MODULE_LICENSE("GPL v2");
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@ -70,8 +70,8 @@
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#define AD7793_CONF_GAIN(x) (((x) & 0x7) << 8) /* Gain Select */
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#define AD7793_CONF_REFSEL (1 << 7) /* INT/EXT Reference Select */
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#define AD7793_CONF_BUF (1 << 4) /* Buffered Mode Enable */
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#define AD7793_CONF_CHAN(x) ((x) & 0x7) /* Channel select */
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#define AD7793_CONF_CHAN_MASK 0x7 /* Channel select mask */
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#define AD7793_CONF_CHAN(x) ((x) & 0xf) /* Channel select */
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#define AD7793_CONF_CHAN_MASK 0xf /* Channel select mask */
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#define AD7793_CH_AIN1P_AIN1M 0 /* AIN1(+) - AIN1(-) */
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#define AD7793_CH_AIN2P_AIN2M 1 /* AIN2(+) - AIN2(-) */
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@ -80,9 +80,15 @@
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#define AD7793_CH_TEMP 6 /* Temp Sensor */
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#define AD7793_CH_AVDD_MONITOR 7 /* AVDD Monitor */
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#define AD7795_CH_AIN4P_AIN4M 4 /* AIN4(+) - AIN4(-) */
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#define AD7795_CH_AIN5P_AIN5M 5 /* AIN5(+) - AIN5(-) */
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#define AD7795_CH_AIN6P_AIN6M 6 /* AIN6(+) - AIN6(-) */
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#define AD7795_CH_AIN1M_AIN1M 8 /* AIN1(-) - AIN1(-) */
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/* ID Register Bit Designations (AD7793_REG_ID) */
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#define AD7792_ID 0xA
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#define AD7793_ID 0xB
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#define AD7795_ID 0xF
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#define AD7793_ID_MASK 0xF
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/* IO (Excitation Current Sources) Register Bit Designations (AD7793_REG_IO) */
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