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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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iio:ad7793: Add support for the ad7796 and ad7797
The ad7796 and ad7797 are similar to the ad7792 and ad7793 but only have a single differential input instead of two. Also some other features are missing like the programmable gain amplifier and also not all sampling frequencies supported by the ad7792/ad7793 are supported by the ad7796/ad7797. This patch adds new feature flags for the features not present in the ad7796/ad7797. The patch also adds a struct iio_info field to the chip_info struct, this becomes necessary since the ad7796/ad7797 needs a special set of sysfs attributes. 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
2edb769d24
commit
fd1a8b9128
@ -106,6 +106,8 @@
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#define AD7793_ID 0xB
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#define AD7794_ID 0xF
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#define AD7795_ID 0xF
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#define AD7796_ID 0xA
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#define AD7797_ID 0xB
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#define AD7798_ID 0x8
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#define AD7799_ID 0x9
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#define AD7793_ID_MASK 0xF
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@ -136,12 +138,17 @@
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#define AD7793_FLAG_HAS_REFSEL BIT(1)
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#define AD7793_FLAG_HAS_VBIAS BIT(2)
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#define AD7793_HAS_EXITATION_CURRENT BIT(3)
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#define AD7793_FLAG_HAS_GAIN BIT(4)
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#define AD7793_FLAG_HAS_BUFFER BIT(5)
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struct ad7793_chip_info {
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unsigned int id;
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const struct iio_chan_spec *channels;
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unsigned int num_channels;
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unsigned int flags;
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const struct iio_info *iio_info;
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const u16 *sample_freq_avail;
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};
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struct ad7793_state {
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@ -162,6 +169,8 @@ enum ad7793_supported_device_ids {
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ID_AD7793,
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ID_AD7794,
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ID_AD7795,
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ID_AD7796,
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ID_AD7797,
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ID_AD7798,
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ID_AD7799,
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};
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@ -283,7 +292,7 @@ static int ad7793_setup(struct iio_dev *indio_dev,
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st->conf |= AD7793_CONF_REFSEL(pdata->refsel);
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if (st->chip_info->flags & AD7793_FLAG_HAS_VBIAS)
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st->conf |= AD7793_CONF_VBIAS(pdata->bias_voltage);
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if (pdata->buffered)
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if (pdata->buffered || !(st->chip_info->flags & AD7793_FLAG_HAS_BUFFER))
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st->conf |= AD7793_CONF_BUF;
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if (pdata->boost_enable &&
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(st->chip_info->flags & AD7793_FLAG_HAS_VBIAS))
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@ -293,6 +302,9 @@ static int ad7793_setup(struct iio_dev *indio_dev,
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if (pdata->unipolar)
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st->conf |= AD7793_CONF_UNIPOLAR;
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if (!(st->chip_info->flags & AD7793_FLAG_HAS_GAIN))
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st->conf |= AD7793_CONF_GAIN(7);
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ret = ad7793_set_mode(&st->sd, AD_SD_MODE_IDLE);
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if (ret)
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goto out;
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@ -330,8 +342,11 @@ static int ad7793_setup(struct iio_dev *indio_dev,
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return ret;
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}
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static const u16 sample_freq_avail[16] = {0, 470, 242, 123, 62, 50, 39, 33, 19,
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17, 16, 12, 10, 8, 6, 4};
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static const u16 ad7793_sample_freq_avail[16] = {0, 470, 242, 123, 62, 50, 39,
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33, 19, 17, 16, 12, 10, 8, 6, 4};
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static const u16 ad7797_sample_freq_avail[16] = {0, 0, 0, 123, 62, 50, 0,
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33, 0, 17, 16, 12, 10, 8, 6, 4};
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static ssize_t ad7793_read_frequency(struct device *dev,
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struct device_attribute *attr,
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@ -341,7 +356,7 @@ static ssize_t ad7793_read_frequency(struct device *dev,
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struct ad7793_state *st = iio_priv(indio_dev);
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return sprintf(buf, "%d\n",
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sample_freq_avail[AD7793_MODE_RATE(st->mode)]);
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st->chip_info->sample_freq_avail[AD7793_MODE_RATE(st->mode)]);
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}
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static ssize_t ad7793_write_frequency(struct device *dev,
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@ -365,10 +380,13 @@ static ssize_t ad7793_write_frequency(struct device *dev,
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if (ret)
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return ret;
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if (lval == 0)
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return -EINVAL;
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ret = -EINVAL;
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for (i = 0; i < ARRAY_SIZE(sample_freq_avail); i++)
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if (lval == sample_freq_avail[i]) {
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for (i = 0; i < 16; i++)
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if (lval == st->chip_info->sample_freq_avail[i]) {
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mutex_lock(&indio_dev->mlock);
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st->mode &= ~AD7793_MODE_RATE(-1);
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st->mode |= AD7793_MODE_RATE(i);
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@ -388,6 +406,9 @@ static IIO_DEV_ATTR_SAMP_FREQ(S_IWUSR | S_IRUGO,
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static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
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"470 242 123 62 50 39 33 19 17 16 12 10 8 6 4");
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static IIO_CONST_ATTR_NAMED(sampling_frequency_available_ad7797,
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sampling_frequency_available, "123 62 50 33 17 16 12 10 8 6 4");
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static ssize_t ad7793_show_scale_available(struct device *dev,
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struct device_attribute *attr, char *buf)
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{
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@ -419,6 +440,16 @@ static const struct attribute_group ad7793_attribute_group = {
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.attrs = ad7793_attributes,
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};
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static struct attribute *ad7797_attributes[] = {
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&iio_dev_attr_sampling_frequency.dev_attr.attr,
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&iio_const_attr_sampling_frequency_available_ad7797.dev_attr.attr,
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NULL
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};
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static const struct attribute_group ad7797_attribute_group = {
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.attrs = ad7797_attributes,
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};
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static int ad7793_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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int *val,
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@ -544,6 +575,15 @@ static const struct iio_info ad7793_info = {
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.driver_module = THIS_MODULE,
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};
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static const struct iio_info ad7797_info = {
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.read_raw = &ad7793_read_raw,
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.write_raw = &ad7793_write_raw,
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.write_raw_get_fmt = &ad7793_write_raw_get_fmt,
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.attrs = &ad7793_attribute_group,
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.validate_trigger = ad_sd_validate_trigger,
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.driver_module = THIS_MODULE,
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};
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#define DECLARE_AD7793_CHANNELS(_name, _b, _sb, _s) \
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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), (_s)), \
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@ -569,6 +609,15 @@ const struct iio_chan_spec _name##_channels[] = { \
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IIO_CHAN_SOFT_TIMESTAMP(9), \
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}
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#define DECLARE_AD7797_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_SHORTED_CHANNEL(1, 0, AD7793_CH_AIN1M_AIN1M, (_b), (_sb), 0), \
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AD_SD_TEMP_CHANNEL(2, AD7793_CH_TEMP, (_b), (_sb), 0), \
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AD_SD_SUPPLY_CHANNEL(3, 3, AD7793_CH_AVDD_MONITOR, (_b), (_sb), 0), \
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IIO_CHAN_SOFT_TIMESTAMP(4), \
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}
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#define DECLARE_AD7799_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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@ -584,6 +633,8 @@ static DECLARE_AD7793_CHANNELS(ad7792, 16, 32, 0);
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static DECLARE_AD7793_CHANNELS(ad7793, 24, 32, 0);
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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 DECLARE_AD7797_CHANNELS(ad7796, 16, 16);
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static DECLARE_AD7797_CHANNELS(ad7797, 24, 32);
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static DECLARE_AD7799_CHANNELS(ad7798, 16, 16);
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static DECLARE_AD7799_CHANNELS(ad7799, 24, 32);
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@ -592,56 +643,100 @@ static const struct ad7793_chip_info ad7793_chip_info_tbl[] = {
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.id = AD7785_ID,
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.channels = ad7785_channels,
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.num_channels = ARRAY_SIZE(ad7785_channels),
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.iio_info = &ad7793_info,
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.sample_freq_avail = ad7793_sample_freq_avail,
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.flags = AD7793_FLAG_HAS_CLKSEL |
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AD7793_FLAG_HAS_REFSEL |
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AD7793_FLAG_HAS_VBIAS |
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AD7793_HAS_EXITATION_CURRENT,
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AD7793_HAS_EXITATION_CURRENT |
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AD7793_FLAG_HAS_GAIN |
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AD7793_FLAG_HAS_BUFFER,
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},
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[ID_AD7792] = {
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.id = AD7792_ID,
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.channels = ad7792_channels,
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.num_channels = ARRAY_SIZE(ad7792_channels),
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.iio_info = &ad7793_info,
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.sample_freq_avail = ad7793_sample_freq_avail,
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.flags = AD7793_FLAG_HAS_CLKSEL |
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AD7793_FLAG_HAS_REFSEL |
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AD7793_FLAG_HAS_VBIAS |
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AD7793_HAS_EXITATION_CURRENT,
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AD7793_HAS_EXITATION_CURRENT |
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AD7793_FLAG_HAS_GAIN |
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AD7793_FLAG_HAS_BUFFER,
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},
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[ID_AD7793] = {
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.id = AD7793_ID,
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.channels = ad7793_channels,
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.num_channels = ARRAY_SIZE(ad7793_channels),
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.iio_info = &ad7793_info,
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.sample_freq_avail = ad7793_sample_freq_avail,
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.flags = AD7793_FLAG_HAS_CLKSEL |
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AD7793_FLAG_HAS_REFSEL |
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AD7793_FLAG_HAS_VBIAS |
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AD7793_HAS_EXITATION_CURRENT,
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AD7793_HAS_EXITATION_CURRENT |
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AD7793_FLAG_HAS_GAIN |
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AD7793_FLAG_HAS_BUFFER,
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},
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[ID_AD7794] = {
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.id = AD7794_ID,
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.channels = ad7794_channels,
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.num_channels = ARRAY_SIZE(ad7794_channels),
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.iio_info = &ad7793_info,
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.sample_freq_avail = ad7793_sample_freq_avail,
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.flags = AD7793_FLAG_HAS_CLKSEL |
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AD7793_FLAG_HAS_REFSEL |
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AD7793_FLAG_HAS_VBIAS |
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AD7793_HAS_EXITATION_CURRENT,
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AD7793_HAS_EXITATION_CURRENT |
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AD7793_FLAG_HAS_GAIN |
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AD7793_FLAG_HAS_BUFFER,
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},
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[ID_AD7795] = {
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.id = AD7795_ID,
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.channels = ad7795_channels,
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.num_channels = ARRAY_SIZE(ad7795_channels),
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.iio_info = &ad7793_info,
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.sample_freq_avail = ad7793_sample_freq_avail,
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.flags = AD7793_FLAG_HAS_CLKSEL |
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AD7793_FLAG_HAS_REFSEL |
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AD7793_FLAG_HAS_VBIAS |
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AD7793_HAS_EXITATION_CURRENT,
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AD7793_HAS_EXITATION_CURRENT |
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AD7793_FLAG_HAS_GAIN |
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AD7793_FLAG_HAS_BUFFER,
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},
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[ID_AD7796] = {
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.id = AD7796_ID,
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.channels = ad7796_channels,
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.num_channels = ARRAY_SIZE(ad7796_channels),
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.iio_info = &ad7797_info,
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.sample_freq_avail = ad7797_sample_freq_avail,
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.flags = AD7793_FLAG_HAS_CLKSEL,
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},
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[ID_AD7797] = {
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.id = AD7797_ID,
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.channels = ad7797_channels,
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.num_channels = ARRAY_SIZE(ad7797_channels),
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.iio_info = &ad7797_info,
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.sample_freq_avail = ad7797_sample_freq_avail,
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.flags = AD7793_FLAG_HAS_CLKSEL,
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},
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[ID_AD7798] = {
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.id = AD7798_ID,
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.channels = ad7798_channels,
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.num_channels = ARRAY_SIZE(ad7798_channels),
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.iio_info = &ad7793_info,
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.sample_freq_avail = ad7793_sample_freq_avail,
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.flags = AD7793_FLAG_HAS_GAIN |
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AD7793_FLAG_HAS_BUFFER,
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},
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[ID_AD7799] = {
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.id = AD7799_ID,
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.channels = ad7799_channels,
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.num_channels = ARRAY_SIZE(ad7799_channels),
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.iio_info = &ad7793_info,
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.sample_freq_avail = ad7793_sample_freq_avail,
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.flags = AD7793_FLAG_HAS_GAIN |
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AD7793_FLAG_HAS_BUFFER,
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},
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};
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@ -702,7 +797,7 @@ static int ad7793_probe(struct spi_device *spi)
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indio_dev->modes = INDIO_DIRECT_MODE;
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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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indio_dev->info = st->chip_info->iio_info;
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ret = ad_sd_setup_buffer_and_trigger(indio_dev);
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if (ret)
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@ -757,6 +852,8 @@ static const struct spi_device_id ad7793_id[] = {
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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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{"ad7796", ID_AD7796},
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{"ad7797", ID_AD7797},
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{"ad7798", ID_AD7798},
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{"ad7799", ID_AD7799},
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{}
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