iio: adc: ad7380: move internal reference voltage to chip_info

Move the internal reference voltage value to the chip_info structure.

Before this change, only ADAQ chips could be internal_ref_only and only
non-ADAQ chips could be external_ref_only. Now, this restriction is
removed.

Signed-off-by: David Lechner <dlechner@baylibre.com>
Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Link: https://patch.msgid.link/20250401-iio-ad7380-add-ad7389-4-v1-3-23d2568aa24f@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ad7380.c b/drivers/iio/adc/ad7380.c
index 18ed072..e5cd11f 100644 (file)
--- a/drivers/iio/adc/ad7380.c
+++ b/drivers/iio/adc/ad7380.c
@@ -120,6 +120,7 @@ struct ad7380_chip_info {
        unsigned int num_supplies;
        bool external_ref_only;
        bool internal_ref_only;
+       unsigned int internal_ref_mv;
        const char * const *vcm_supplies;
        unsigned int num_vcm_supplies;
        const unsigned long *available_scan_masks;
@@ -609,6 +610,7 @@ static const struct ad7380_chip_info ad7380_chip_info = {
        .num_simult_channels = 2,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .available_scan_masks = ad7380_2_channel_scan_masks,
        .timing_specs = &ad7380_timing,
        .max_conversion_rate_hz = 4 * MEGA,
@@ -622,6 +624,7 @@ static const struct ad7380_chip_info ad7381_chip_info = {
        .num_simult_channels = 2,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .available_scan_masks = ad7380_2_channel_scan_masks,
        .timing_specs = &ad7380_timing,
        .max_conversion_rate_hz = 4 * MEGA,
@@ -637,6 +640,7 @@ static const struct ad7380_chip_info ad7383_chip_info = {
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
        .vcm_supplies = ad7380_2_channel_vcm_supplies,
        .num_vcm_supplies = ARRAY_SIZE(ad7380_2_channel_vcm_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .available_scan_masks = ad7380_2_channel_scan_masks,
        .timing_specs = &ad7380_timing,
        .max_conversion_rate_hz = 4 * MEGA,
@@ -652,6 +656,7 @@ static const struct ad7380_chip_info ad7384_chip_info = {
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
        .vcm_supplies = ad7380_2_channel_vcm_supplies,
        .num_vcm_supplies = ARRAY_SIZE(ad7380_2_channel_vcm_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .available_scan_masks = ad7380_2_channel_scan_masks,
        .timing_specs = &ad7380_timing,
        .max_conversion_rate_hz = 4 * MEGA,
@@ -665,6 +670,7 @@ static const struct ad7380_chip_info ad7386_chip_info = {
        .num_simult_channels = 2,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .has_mux = true,
        .available_scan_masks = ad7380_2x2_channel_scan_masks,
        .timing_specs = &ad7380_timing,
@@ -679,6 +685,7 @@ static const struct ad7380_chip_info ad7387_chip_info = {
        .num_simult_channels = 2,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .has_mux = true,
        .available_scan_masks = ad7380_2x2_channel_scan_masks,
        .timing_specs = &ad7380_timing,
@@ -693,6 +700,7 @@ static const struct ad7380_chip_info ad7388_chip_info = {
        .num_simult_channels = 2,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .has_mux = true,
        .available_scan_masks = ad7380_2x2_channel_scan_masks,
        .timing_specs = &ad7380_timing,
@@ -721,6 +729,7 @@ static const struct ad7380_chip_info ad7381_4_chip_info = {
        .num_simult_channels = 4,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .available_scan_masks = ad7380_4_channel_scan_masks,
        .timing_specs = &ad7380_4_timing,
        .max_conversion_rate_hz = 4 * MEGA,
@@ -734,6 +743,7 @@ static const struct ad7380_chip_info ad7383_4_chip_info = {
        .num_simult_channels = 4,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .vcm_supplies = ad7380_4_channel_vcm_supplies,
        .num_vcm_supplies = ARRAY_SIZE(ad7380_4_channel_vcm_supplies),
        .available_scan_masks = ad7380_4_channel_scan_masks,
@@ -749,6 +759,7 @@ static const struct ad7380_chip_info ad7384_4_chip_info = {
        .num_simult_channels = 4,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .vcm_supplies = ad7380_4_channel_vcm_supplies,
        .num_vcm_supplies = ARRAY_SIZE(ad7380_4_channel_vcm_supplies),
        .available_scan_masks = ad7380_4_channel_scan_masks,
@@ -764,6 +775,7 @@ static const struct ad7380_chip_info ad7386_4_chip_info = {
        .num_simult_channels = 4,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .has_mux = true,
        .available_scan_masks = ad7380_2x4_channel_scan_masks,
        .timing_specs = &ad7380_4_timing,
@@ -778,6 +790,7 @@ static const struct ad7380_chip_info ad7387_4_chip_info = {
        .num_simult_channels = 4,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .has_mux = true,
        .available_scan_masks = ad7380_2x4_channel_scan_masks,
        .timing_specs = &ad7380_4_timing,
@@ -792,6 +805,7 @@ static const struct ad7380_chip_info ad7388_4_chip_info = {
        .num_simult_channels = 4,
        .supplies = ad7380_supplies,
        .num_supplies = ARRAY_SIZE(ad7380_supplies),
+       .internal_ref_mv = AD7380_INTERNAL_REF_MV,
        .has_mux = true,
        .available_scan_masks = ad7380_2x4_channel_scan_masks,
        .timing_specs = &ad7380_4_timing,
@@ -807,6 +821,7 @@ static const struct ad7380_chip_info adaq4370_4_chip_info = {
        .supplies = adaq4380_supplies,
        .num_supplies = ARRAY_SIZE(adaq4380_supplies),
        .internal_ref_only = true,
+       .internal_ref_mv = ADAQ4380_INTERNAL_REF_MV,
        .has_hardware_gain = true,
        .available_scan_masks = ad7380_4_channel_scan_masks,
        .timing_specs = &ad7380_4_timing,
@@ -822,6 +837,7 @@ static const struct ad7380_chip_info adaq4380_4_chip_info = {
        .supplies = adaq4380_supplies,
        .num_supplies = ARRAY_SIZE(adaq4380_supplies),
        .internal_ref_only = true,
+       .internal_ref_mv = ADAQ4380_INTERNAL_REF_MV,
        .has_hardware_gain = true,
        .available_scan_masks = ad7380_4_channel_scan_masks,
        .timing_specs = &ad7380_4_timing,
@@ -837,6 +853,7 @@ static const struct ad7380_chip_info adaq4381_4_chip_info = {
        .supplies = adaq4380_supplies,
        .num_supplies = ARRAY_SIZE(adaq4380_supplies),
        .internal_ref_only = true,
+       .internal_ref_mv = ADAQ4380_INTERNAL_REF_MV,
        .has_hardware_gain = true,
        .available_scan_masks = ad7380_4_channel_scan_masks,
        .timing_specs = &ad7380_4_timing,
@@ -1855,7 +1872,7 @@ static int ad7380_probe(struct spi_device *spi)
                 * in bulk_get_enable().
                 */
 
-               st->vref_mv = ADAQ4380_INTERNAL_REF_MV;
+               st->vref_mv = st->chip_info->internal_ref_mv;
 
                /* these chips don't have a register bit for this */
                external_ref_en = false;
@@ -1880,7 +1897,8 @@ static int ad7380_probe(struct spi_device *spi)
                                             "Failed to get refio regulator\n");
 
                external_ref_en = ret != -ENODEV;
-               st->vref_mv = external_ref_en ? ret / 1000 : AD7380_INTERNAL_REF_MV;
+               st->vref_mv = external_ref_en ? ret / 1000
+                                             : st->chip_info->internal_ref_mv;
        }
 
        if (st->chip_info->num_vcm_supplies > ARRAY_SIZE(st->vcm_mv))