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iio: adc: ina2xx: Clarify size requirement for data buffer 

The timestamp is inserted into the buffer after the sample data by
iio_push_to_buffers_with_timestamp, document the space requirement for
the timestamp.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Stefan Brüns 2017-12-08 18:41:47 +01:00 committed by Greg Kroah-Hartman
parent 17b3453f5c
commit d456d61f53
1 changed files with 2 additions and 1 deletions
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3
drivers/iio/adc/ina2xx-adc.c
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@ -700,7 +700,8 @@ static const struct iio_chan_spec ina219_channels[] = {
static int ina2xx_work_buffer(struct iio_dev *indio_dev) static int ina2xx_work_buffer(struct iio_dev *indio_dev)
{ {
struct ina2xx_chip_info *chip = iio_priv(indio_dev); struct ina2xx_chip_info *chip = iio_priv(indio_dev);
unsigned short data[8]; /* data buffer needs space for channel data and timestap */
unsigned short data[4 + sizeof(s64)/sizeof(short)];
int bit, ret, i = 0; int bit, ret, i = 0;
s64 time_a, time_b; s64 time_a, time_b;
unsigned int alert; unsigned int alert;