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iio:pressure:ms5637: limit available sample frequencies

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Avoid exposing all the sampling frequencies for chip that only support a
subset.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Link: https://lore.kernel.org/r/20210109231148.1168104-4-alexandre.belloni@bootlin.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Alexandre Belloni 2021-01-10 00:11:45 +01:00 committed by Jonathan Cameron
parent 8c125f5f32
commit 07498719be
1 changed files with 15 additions and 4 deletions
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19
drivers/iio/pressure/ms5637.c
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@ -36,8 +36,19 @@ struct ms_tp_data {
};
static const int ms5637_samp_freq[6] = { 960, 480, 240, 120, 60, 30 };
/* String copy of the above const for readability purpose */
static const char ms5637_show_samp_freq[] = "960 480 240 120 60 30";
static ssize_t ms5637_show_samp_freq(struct device *dev, struct device_attribute *attr, char *buf)
{
struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct ms_tp_dev *dev_data = iio_priv(indio_dev);
int i, len = 0;
for (i = 0; i <= dev_data->hw->max_res_index; i++)
len += sysfs_emit_at(buf, len, "%u ", ms5637_samp_freq[i]);
sysfs_emit_at(buf, len - 1, "\n");
return len;
}
static int ms5637_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *channel, int *val,
@ -114,10 +125,10 @@ static const struct iio_chan_spec ms5637_channels[] = {
}
};
static IIO_CONST_ATTR_SAMP_FREQ_AVAIL(ms5637_show_samp_freq);
static IIO_DEV_ATTR_SAMP_FREQ_AVAIL(ms5637_show_samp_freq);
static struct attribute *ms5637_attributes[] = {
&iio_const_attr_sampling_frequency_available.dev_attr.attr,
&iio_dev_attr_sampling_frequency_available.dev_attr.attr,
NULL,
};