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| author |   Alexandre Belloni <alexandre.belloni@bootlin.com> | 2021-01-10 00:11:45 +0100 |
|---|---|---|
| committer |   Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2021-01-22 08:52:06 +0000 |
| commit | 07498719bedecc8be1ecc62ea50315e91a668cac (patch) | |
| tree | 732e82026959f14db44676d7ab5e21625587b497 /drivers/iio/pressure | |
| parent | iio:pressure:ms5637: introduce hardware differentiation (diff) | |
| download | linux-dev-07498719bedecc8be1ecc62ea50315e91a668cac.tar.xz linux-dev-07498719bedecc8be1ecc62ea50315e91a668cac.zip | |
iio:pressure:ms5637: limit available sample frequencies
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>
Diffstat (limited to 'drivers/iio/pressure')
| -rw-r--r-- | drivers/iio/pressure/ms5637.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/drivers/iio/pressure/ms5637.c b/drivers/iio/pressure/ms5637.c index fdd557ac71a3..0a6034342714 100644 --- a/drivers/iio/pressure/ms5637.c +++ b/drivers/iio/pressure/ms5637.c @@ -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, }; |