iio: temperature: mlx90614 Refactoring available filter attributes

Change/refactor to the new way of defining available attribute values.

Signed-off-by: Crt Mori <cmo@melexis.com>
Link: https://lore.kernel.org/r/20220906112632.244453-1-cmo@melexis.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

diff --git a/drivers/iio/temperature/mlx90614.c b/drivers/iio/temperature/mlx90614.c
index c253a53159881aa8a7ba720c7ec1382a5d82ec96..3157416be912f82602f9bdeec3134b762c8b71f0 100644 (file)
--- a/drivers/iio/temperature/mlx90614.c
+++ b/drivers/iio/temperature/mlx90614.c
@@ -79,16 +79,15 @@ struct mlx90614_data {
 
 /* Bandwidth values for IIR filtering */
 static const int mlx90614_iir_values[] = {77, 31, 20, 15, 723, 153, 110, 86};
-static IIO_CONST_ATTR(in_temp_object_filter_low_pass_3db_frequency_available,
-                     "0.15 0.20 0.31 0.77 0.86 1.10 1.53 7.23");
-
-static struct attribute *mlx90614_attributes[] = {
-       &iio_const_attr_in_temp_object_filter_low_pass_3db_frequency_available.dev_attr.attr,
-       NULL,
-};
-
-static const struct attribute_group mlx90614_attr_group = {
-       .attrs = mlx90614_attributes,
+static const int mlx90614_freqs[][2] = {
+       {0, 150000},
+       {0, 200000},
+       {0, 310000},
+       {0, 770000},
+       {0, 860000},
+       {1, 100000},
+       {1, 530000},
+       {7, 230000}
 };
 
 /*
@@ -373,6 +372,22 @@ static int mlx90614_write_raw_get_fmt(struct iio_dev *indio_dev,
        }
 }
 
+static int mlx90614_read_avail(struct iio_dev *indio_dev,
+                              struct iio_chan_spec const *chan,
+                              const int **vals, int *type, int *length,
+                              long mask)
+{
+       switch (mask) {
+       case IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY:
+               *vals = (int *)mlx90614_freqs;
+               *type = IIO_VAL_INT_PLUS_MICRO;
+               *length = 2 * ARRAY_SIZE(mlx90614_freqs);
+               return IIO_AVAIL_LIST;
+       default:
+               return -EINVAL;
+       }
+}
+
 static const struct iio_chan_spec mlx90614_channels[] = {
        {
                .type = IIO_TEMP,
@@ -389,6 +404,8 @@ static const struct iio_chan_spec mlx90614_channels[] = {
                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
                    BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) |
                        BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
+               .info_mask_separate_available =
+                       BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
                .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
                    BIT(IIO_CHAN_INFO_SCALE),
        },
@@ -401,6 +418,8 @@ static const struct iio_chan_spec mlx90614_channels[] = {
                .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
                    BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) |
                        BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
+               .info_mask_separate_available =
+                       BIT(IIO_CHAN_INFO_LOW_PASS_FILTER_3DB_FREQUENCY),
                .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_OFFSET) |
                    BIT(IIO_CHAN_INFO_SCALE),
        },
@@ -410,7 +429,7 @@ static const struct iio_info mlx90614_info = {
        .read_raw = mlx90614_read_raw,
        .write_raw = mlx90614_write_raw,
        .write_raw_get_fmt = mlx90614_write_raw_get_fmt,
-       .attrs = &mlx90614_attr_group,
+       .read_avail = mlx90614_read_avail,
 };
 
 #ifdef CONFIG_PM