iio: temperature: mlx90632 Read sampling frequency
Allow users to read sensor sampling frequency to better plan the application measurement requests. Signed-off-by: Crt Mori <cmo@melexis.com> Link: https://lore.kernel.org/r/0bd6d6d665b4bd39e4565f6f44cb1bdc03386e23.1663834141.git.cmo@melexis.com Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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2aebc223fc
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eff07b2070
drivers/iio/temperature
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@ -81,6 +81,9 @@
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#define MLX90632_PWR_STATUS_CONTINUOUS MLX90632_PWR_STATUS(3) /* continuous */
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#define MLX90632_EE_RR GENMASK(10, 8) /* Only Refresh Rate bits */
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#define MLX90632_REFRESH_RATE(ee_val) FIELD_GET(MLX90632_EE_RR, ee_val)
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/* Extract Refresh Rate from ee register */
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#define MLX90632_REFRESH_RATE_STATUS(refresh_rate) (refresh_rate << 8)
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/* Measurement types */
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#define MLX90632_MTYP_MEDICAL 0
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@ -914,6 +917,32 @@ static int mlx90632_calc_ambient_dsp105(struct mlx90632_data *data, int *val)
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return ret;
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}
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static int mlx90632_get_refresh_rate(struct mlx90632_data *data,
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int *refresh_rate)
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{
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unsigned int meas1;
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int ret;
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ret = regmap_read(data->regmap, MLX90632_EE_MEDICAL_MEAS1, &meas1);
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if (ret < 0)
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return ret;
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*refresh_rate = MLX90632_REFRESH_RATE(meas1);
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return ret;
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}
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static const int mlx90632_freqs[][2] = {
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{0, 500000},
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{1, 0},
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{2, 0},
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{4, 0},
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{8, 0},
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{16, 0},
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{32, 0},
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{64, 0}
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};
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/**
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* mlx90632_pm_interraction_wakeup() - Measure time between user interactions to change powermode
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* @data: pointer to mlx90632_data object containing interaction_ts information
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@ -992,6 +1021,15 @@ static int mlx90632_read_raw(struct iio_dev *indio_dev,
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*val = data->object_ambient_temperature;
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ret = IIO_VAL_INT;
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break;
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case IIO_CHAN_INFO_SAMP_FREQ:
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ret = mlx90632_get_refresh_rate(data, &cr);
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if (ret < 0)
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goto mlx90632_read_raw_pm;
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*val = mlx90632_freqs[cr][0];
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*val2 = mlx90632_freqs[cr][1];
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ret = IIO_VAL_INT_PLUS_MICRO;
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break;
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default:
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ret = -EINVAL;
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break;
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@ -1025,12 +1063,30 @@ static int mlx90632_write_raw(struct iio_dev *indio_dev,
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}
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}
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static int mlx90632_read_avail(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan,
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const int **vals, int *type, int *length,
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long mask)
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{
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switch (mask) {
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case IIO_CHAN_INFO_SAMP_FREQ:
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*vals = (int *)mlx90632_freqs;
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*type = IIO_VAL_INT_PLUS_MICRO;
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*length = 2 * ARRAY_SIZE(mlx90632_freqs);
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return IIO_AVAIL_LIST;
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default:
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return -EINVAL;
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}
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}
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static const struct iio_chan_spec mlx90632_channels[] = {
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{
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.type = IIO_TEMP,
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.modified = 1,
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.channel2 = IIO_MOD_TEMP_AMBIENT,
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.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
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.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
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.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
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},
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{
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.type = IIO_TEMP,
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@ -1038,12 +1094,15 @@ static const struct iio_chan_spec mlx90632_channels[] = {
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.channel2 = IIO_MOD_TEMP_OBJECT,
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.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
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BIT(IIO_CHAN_INFO_CALIBEMISSIVITY) | BIT(IIO_CHAN_INFO_CALIBAMBIENT),
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.info_mask_shared_by_all = BIT(IIO_CHAN_INFO_SAMP_FREQ),
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.info_mask_shared_by_all_available = BIT(IIO_CHAN_INFO_SAMP_FREQ),
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},
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};
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static const struct iio_info mlx90632_info = {
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.read_raw = mlx90632_read_raw,
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.write_raw = mlx90632_write_raw,
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.read_avail = mlx90632_read_avail,
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};
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static void mlx90632_sleep(void *_data)
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