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iio: chemical: atlas-sensor: add helper function atlas_buffer_num_channels()

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Add helper function to detect the number of channels to output
in trigger handler. This is based on IIO_TIMESTAMP channel being the
delimiter between input and output channels.

Signed-off-by: Matt Ranostay <matt.ranostay@konsulko.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Matt Ranostay 2020-01-03 17:29:08 -08:00 committed by Jonathan Cameron
parent f335fa7034
commit 4766897a9d
1 changed files with 12 additions and 1 deletions
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13
drivers/iio/chemical/atlas-sensor.c
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@ -86,6 +86,16 @@ static const struct regmap_config atlas_regmap_config = {
.val_bits = 8,
};
static int atlas_buffer_num_channels(const struct iio_chan_spec *spec)
{
int idx = 0;
for (; spec->type != IIO_TIMESTAMP; spec++)
idx++;
return idx;
};
static const struct iio_chan_spec atlas_ph_channels[] = {
{
.type = IIO_PH,
@ -354,11 +364,12 @@ static irqreturn_t atlas_trigger_handler(int irq, void *private)
struct iio_poll_func *pf = private;
struct iio_dev *indio_dev = pf->indio_dev;
struct atlas_data *data = iio_priv(indio_dev);
int channels = atlas_buffer_num_channels(data->chip->channels);
int ret;
ret = regmap_bulk_read(data->regmap, data->chip->data_reg,
(u8 *) &data->buffer,
sizeof(__be32) * (data->chip->num_channels - 2));
sizeof(__be32) * channels);
if (!ret)
iio_push_to_buffers_with_timestamp(indio_dev, data->buffer,