iio: adc: ad7606: add missing max sample rates

Add max sample rates for all of the chips. Previously, only one chip had
this field populated. The fallback value for the initial sampling
frequency can be removed now that all chips have a max sample rate
defined.

Reviewed-by: Nuno Sá <nuno.sa@analog.com>
Signed-off-by: David Lechner <dlechner@baylibre.com>
Link: https://patch.msgid.link/20250318-iio-adc-ad7606-improvements-v2-3-4b605427774c@baylibre.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c
index 1a314fddd7eb987b52016ce7242b446677f66427..36cc2b5ea7ad1b4cf1ec8cfbe21a603052f3753b 100644 (file)
--- a/drivers/iio/adc/ad7606.c
+++ b/drivers/iio/adc/ad7606.c
@@ -196,6 +196,7 @@ static int ad7616_sw_mode_setup(struct iio_dev *indio_dev);
 static int ad7606b_sw_mode_setup(struct iio_dev *indio_dev);
 
 const struct ad7606_chip_info ad7605_4_info = {
+       .max_samplerate = 300 * KILO,
        .channels = ad7605_channels,
        .name = "ad7605-4",
        .num_adc_channels = 4,
@@ -205,6 +206,7 @@ const struct ad7606_chip_info ad7605_4_info = {
 EXPORT_SYMBOL_NS_GPL(ad7605_4_info, "IIO_AD7606");
 
 const struct ad7606_chip_info ad7606_8_info = {
+       .max_samplerate = 200 * KILO,
        .channels = ad7606_channels_16bit,
        .name = "ad7606-8",
        .num_adc_channels = 8,
@@ -216,6 +218,7 @@ const struct ad7606_chip_info ad7606_8_info = {
 EXPORT_SYMBOL_NS_GPL(ad7606_8_info, "IIO_AD7606");
 
 const struct ad7606_chip_info ad7606_6_info = {
+       .max_samplerate = 200 * KILO,
        .channels = ad7606_channels_16bit,
        .name = "ad7606-6",
        .num_adc_channels = 6,
@@ -227,6 +230,7 @@ const struct ad7606_chip_info ad7606_6_info = {
 EXPORT_SYMBOL_NS_GPL(ad7606_6_info, "IIO_AD7606");
 
 const struct ad7606_chip_info ad7606_4_info = {
+       .max_samplerate = 200 * KILO,
        .channels = ad7606_channels_16bit,
        .name = "ad7606-4",
        .num_adc_channels = 4,
@@ -251,6 +255,7 @@ const struct ad7606_chip_info ad7606b_info = {
 EXPORT_SYMBOL_NS_GPL(ad7606b_info, "IIO_AD7606");
 
 const struct ad7606_chip_info ad7606c_16_info = {
+       .max_samplerate = 1 * MEGA,
        .channels = ad7606_channels_16bit,
        .name = "ad7606c16",
        .num_adc_channels = 8,
@@ -263,6 +268,7 @@ const struct ad7606_chip_info ad7606c_16_info = {
 EXPORT_SYMBOL_NS_GPL(ad7606c_16_info, "IIO_AD7606");
 
 const struct ad7606_chip_info ad7607_info = {
+       .max_samplerate = 200 * KILO,
        .channels = ad7607_channels,
        .name = "ad7607",
        .num_adc_channels = 8,
@@ -274,6 +280,7 @@ const struct ad7606_chip_info ad7607_info = {
 EXPORT_SYMBOL_NS_GPL(ad7607_info, "IIO_AD7606");
 
 const struct ad7606_chip_info ad7608_info = {
+       .max_samplerate = 200 * KILO,
        .channels = ad7608_channels,
        .name = "ad7608",
        .num_adc_channels = 8,
@@ -285,6 +292,7 @@ const struct ad7606_chip_info ad7608_info = {
 EXPORT_SYMBOL_NS_GPL(ad7608_info, "IIO_AD7606");
 
 const struct ad7606_chip_info ad7609_info = {
+       .max_samplerate = 200 * KILO,
        .channels = ad7608_channels,
        .name = "ad7609",
        .num_adc_channels = 8,
@@ -296,6 +304,7 @@ const struct ad7606_chip_info ad7609_info = {
 EXPORT_SYMBOL_NS_GPL(ad7609_info, "IIO_AD7606");
 
 const struct ad7606_chip_info ad7606c_18_info = {
+       .max_samplerate = 1 * MEGA,
        .channels = ad7606_channels_18bit,
        .name = "ad7606c18",
        .num_adc_channels = 8,
@@ -308,6 +317,7 @@ const struct ad7606_chip_info ad7606c_18_info = {
 EXPORT_SYMBOL_NS_GPL(ad7606c_18_info, "IIO_AD7606");
 
 const struct ad7606_chip_info ad7616_info = {
+       .max_samplerate = 1 * MEGA,
        .channels = ad7616_channels,
        .init_delay_ms = 15,
        .name = "ad7616",
@@ -1396,8 +1406,7 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address,
                 * If there is a backend, the PWM should not overpass the maximum sampling
                 * frequency the chip supports.
                 */
-               ret = ad7606_set_sampling_freq(st,
-                                              chip_info->max_samplerate ? : 2 * KILO);
+               ret = ad7606_set_sampling_freq(st, chip_info->max_samplerate);
                if (ret)
                        return ret;