1 files changed, 37 insertions, 18 deletions

diff --git a/drivers/iio/adc/ad7793.c b/drivers/iio/adc/ad7793.c
index 5592ae573e6b..7005bde50a76 100644
--- a/drivers/iio/adc/ad7793.c
+++ b/drivers/iio/adc/ad7793.c
@@ -354,29 +354,28 @@ static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(
 static IIO_CONST_ATTR_NAMED(sampling_frequency_available_ad7797,
 	sampling_frequency_available, "123 62 50 33 17 16 12 10 8 6 4");
 
-static ssize_t ad7793_show_scale_available(struct device *dev,
-			struct device_attribute *attr, char *buf)
+static int ad7793_read_avail(struct iio_dev *indio_dev,
+			     struct iio_chan_spec const *chan,
+			     const int **vals, int *type, int *length,
+			     long mask)
 {
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
 	struct ad7793_state *st = iio_priv(indio_dev);
-	int i, len = 0;
 
-	for (i = 0; i < ARRAY_SIZE(st->scale_avail); i++)
-		len += sprintf(buf + len, "%d.%09u ", st->scale_avail[i][0],
-			       st->scale_avail[i][1]);
-
-	len += sprintf(buf + len, "\n");
+	switch (mask) {
+	case IIO_CHAN_INFO_SCALE:
+		*vals = (int *)st->scale_avail;
+		*type = IIO_VAL_INT_PLUS_NANO;
+		/* Values are stored in a 2D matrix  */
+		*length = ARRAY_SIZE(st->scale_avail) * 2;
 
-	return len;
+		return IIO_AVAIL_LIST;
+	default:
+		return -EINVAL;
+	}
 }
 
-static IIO_DEVICE_ATTR_NAMED(in_m_in_scale_available,
-		in_voltage-voltage_scale_available, S_IRUGO,
-		ad7793_show_scale_available, NULL, 0);
-
 static struct attribute *ad7793_attributes[] = {
 	&iio_const_attr_sampling_frequency_available.dev_attr.attr,
-	&iio_dev_attr_in_m_in_scale_available.dev_attr.attr,
 	NULL
 };
 
@@ -534,6 +533,7 @@ static const struct iio_info ad7793_info = {
 	.read_raw = &ad7793_read_raw,
 	.write_raw = &ad7793_write_raw,
 	.write_raw_get_fmt = &ad7793_write_raw_get_fmt,
+	.read_avail = ad7793_read_avail,
 	.attrs = &ad7793_attribute_group,
 	.validate_trigger = ad_sd_validate_trigger,
 };
@@ -547,7 +547,7 @@ static const struct iio_info ad7797_info = {
 };
 
 #define __AD7793_CHANNEL(_si, _channel1, _channel2, _address, _bits, \
-	_storagebits, _shift, _extend_name, _type, _mask_all) \
+	_storagebits, _shift, _extend_name, _type, _mask_type_av, _mask_all) \
 	{ \
 		.type = (_type), \
 		.differential = (_channel2 == -1 ? 0 : 1), \
@@ -559,6 +559,7 @@ static const struct iio_info ad7797_info = {
 		.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | \
 			BIT(IIO_CHAN_INFO_OFFSET), \
 		.info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \
+		.info_mask_shared_by_type_available = (_mask_type_av), \
 		.info_mask_shared_by_all = _mask_all, \
 		.scan_index = (_si), \
 		.scan_type = { \
@@ -574,23 +575,41 @@ static const struct iio_info ad7797_info = {
 	_storagebits, _shift) \
 	__AD7793_CHANNEL(_si, _channel1, _channel2, _address, _bits, \
 		_storagebits, _shift, NULL, IIO_VOLTAGE, \
+		BIT(IIO_CHAN_INFO_SCALE), \
 		BIT(IIO_CHAN_INFO_SAMP_FREQ))
 
 #define AD7793_SHORTED_CHANNEL(_si, _channel, _address, _bits, \
 	_storagebits, _shift) \
 	__AD7793_CHANNEL(_si, _channel, _channel, _address, _bits, \
 		_storagebits, _shift, "shorted", IIO_VOLTAGE, \
+		BIT(IIO_CHAN_INFO_SCALE), \
 		BIT(IIO_CHAN_INFO_SAMP_FREQ))
 
 #define AD7793_TEMP_CHANNEL(_si, _address, _bits, _storagebits, _shift) \
 	__AD7793_CHANNEL(_si, 0, -1, _address, _bits, \
 		_storagebits, _shift, NULL, IIO_TEMP, \
+		0, \
 		BIT(IIO_CHAN_INFO_SAMP_FREQ))
 
 #define AD7793_SUPPLY_CHANNEL(_si, _channel, _address, _bits, _storagebits, \
 	_shift) \
 	__AD7793_CHANNEL(_si, _channel, -1, _address, _bits, \
 		_storagebits, _shift, "supply", IIO_VOLTAGE, \
+		0, \
+		BIT(IIO_CHAN_INFO_SAMP_FREQ))
+
+#define AD7797_DIFF_CHANNEL(_si, _channel1, _channel2, _address, _bits, \
+	_storagebits, _shift) \
+	__AD7793_CHANNEL(_si, _channel1, _channel2, _address, _bits, \
+		_storagebits, _shift, NULL, IIO_VOLTAGE, \
+		0, \
+		BIT(IIO_CHAN_INFO_SAMP_FREQ))
+
+#define AD7797_SHORTED_CHANNEL(_si, _channel, _address, _bits, \
+	_storagebits, _shift) \
+	__AD7793_CHANNEL(_si, _channel, _channel, _address, _bits, \
+		_storagebits, _shift, "shorted", IIO_VOLTAGE, \
+		0, \
 		BIT(IIO_CHAN_INFO_SAMP_FREQ))
 
 #define DECLARE_AD7793_CHANNELS(_name, _b, _sb, _s) \
@@ -620,8 +639,8 @@ const struct iio_chan_spec _name##_channels[] = { \
 
 #define DECLARE_AD7797_CHANNELS(_name, _b, _sb) \
 const struct iio_chan_spec _name##_channels[] = { \
-	AD7793_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, (_b), (_sb), 0), \
-	AD7793_SHORTED_CHANNEL(1, 0, AD7793_CH_AIN1M_AIN1M, (_b), (_sb), 0), \
+	AD7797_DIFF_CHANNEL(0, 0, 0, AD7793_CH_AIN1P_AIN1M, (_b), (_sb), 0), \
+	AD7797_SHORTED_CHANNEL(1, 0, AD7793_CH_AIN1M_AIN1M, (_b), (_sb), 0), \
 	AD7793_TEMP_CHANNEL(2, AD7793_CH_TEMP, (_b), (_sb), 0), \
 	AD7793_SUPPLY_CHANNEL(3, 3, AD7793_CH_AVDD_MONITOR, (_b), (_sb), 0), \
 	IIO_CHAN_SOFT_TIMESTAMP(4), \