On Tue, Sep 6, 2022 at 12:04 PM <cmo@xxxxxxxxxxx> wrote:
>
> From: Crt Mori <cmo@xxxxxxxxxxx>
>
> Allow users to read sensor sampling frequency to better plan the
> application measurement requests.
>
> Signed-off-by: Crt Mori <cmo@xxxxxxxxxxx>
> ---
> drivers/iio/temperature/mlx90632.c | 51 ++++++++++++++++++++++++++++++
> 1 file changed, 51 insertions(+)
>
> diff --git a/drivers/iio/temperature/mlx90632.c b/drivers/iio/temperature/mlx90632.c
> index e41a18edbc65..6b33284eb0b6 100644
> --- a/drivers/iio/temperature/mlx90632.c
> +++ b/drivers/iio/temperature/mlx90632.c
> @@ -81,6 +81,9 @@
> #define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous */
>
> #define MLX90632_EE_RR GENMASK(10, 8) /* Only Refresh Rate bits */
> +#define MLX90632_REFRESH_RATE(ee_val) FIELD_GET(MLX90632_EE_RR, ee_val)
> + /* Extract Refresh Rate from ee register */
> +#define MLX90632_REFRESH_RATE_STATUS(refresh_rate) (refresh_rate << 8)
>
> /* Measurement types */
> #define MLX90632_MTYP_MEDICAL 0
> @@ -915,6 +918,24 @@ static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val)
> return ret;
> }
>
> +static int mlx90632_get_refresh_rate(struct mlx90632_data *data,
> + int *refresh_rate)
> +{
> + unsigned int meas1;
> + int ret;
> +
> + ret = regmap_read(data->regmap, MLX90632_EE_MEDICAL_MEAS1, &meas1);
> + if (ret < 0)
> + return ret;
> +
> + *refresh_rate = MLX90632_REFRESH_RATE(meas1);
> +
> + return ret;
> +}
> +
> +static const int mlx90632_freqs[][2] = { {0, 500000}, {1, 0}, {2, 0}, {4, 0},
> + {8, 0}, {16, 0}, {32, 0}, {64, 0} };
I would indent this as
_freqs ... = {
...pairs...
};
Either way,
Reviewed-by: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
> +
> /**
> * mlx90632_pm_interraction_wakeup() - Measure time between user interactions to change powermode
> * @data: pointer to mlx90632_data object containing interaction_ts information
> @@ -993,6 +1014,15 @@ static int mlx90632_read_raw(struct iio_dev *indio_dev,
> *val = data->object_ambient_temperature;
> ret = IIO_VAL_INT;
> break;
> + case IIO_CHAN_INFO_SAMP_FREQ:
> + ret = mlx90632_get_refresh_rate(data, &cr);
> + if (ret < 0)
> + goto mlx90632_read_raw_pm;
> +
> + *val = mlx90632_freqs[cr][0];
> + *val2 = mlx90632_freqs[cr][1];
> + ret = IIO_VAL_INT_PLUS_MICRO;
> + break;
> default:
> ret = -EINVAL;
> break;
> @@ -1026,12 +1056,30 @@ static int mlx90632_write_raw(struct iio_dev *indio_dev,
> }
> }
>
> +static int mlx90632_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_SAMP_FREQ:
> + *vals = (int *)mlx90632_freqs;
> + *type = IIO_VAL_INT_PLUS_MICRO;
> + *length = 2 * ARRAY_SIZE(mlx90632_freqs);
> + return IIO_AVAIL_LIST;
> + default:
> + return -EINVAL;
> + }
> +}
> +
> static const struct iio_chan_spec mlx90632_channels[] = {
> {
> .type = IIO_TEMP,
> .modified = 1,
> .channel2 = IIO_MOD_TEMP_AMBIENT,
> .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
> + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
> },
> {
> .type = IIO_TEMP,
> @@ -1039,12 +1087,15 @@ static const struct iio_chan_spec mlx90632_channels[] = {
> .channel2 = IIO_MOD_TEMP_OBJECT,
> .info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | BIT(IIO_CHAN_INFO_CALIBAMBIENT),
> + .info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
> + .info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
> },
> };
>
> static const struct iio_info mlx90632_info = {
> .read_raw = mlx90632_read_raw,
> .write_raw = mlx90632_write_raw,
> + .read_avail = mlx90632_read_avail,
> };
>
> static int mlx90632_sleep(struct mlx90632_data *data)
> --
> 2.34.1
>
--
With Best Regards,
Andy Shevchenko
