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iio: accel: adxl372: Fix/remove limitation for FIFO samples 

Currently, the driver sets the FIFO_SAMPLES register with the number of
sample sets (maximum of 170 for 3 axis data, 256 for 2-axis and 512 for
single axis). However, the FIFO_SAMPLES register should store the number
of samples, regardless of how the FIFO format is configured.

Signed-off-by: Stefan Popa <stefan.popa@analog.com>
Fixes: f4f55ce38e ("iio:adxl372: Add FIFO and interrupts support")
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
alistair/sunxi64-5.4-dsi
Stefan Popa 2019-09-10 17:43:32 +03:00 committed by Jonathan Cameron
parent 4043ecfb5f
commit d202ce4787
1 changed files with 8 additions and 3 deletions
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11
drivers/iio/accel/adxl372.c
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@ -474,12 +474,17 @@ static int adxl372_configure_fifo(struct adxl372_state *st)
if (ret < 0)
return ret;
fifo_samples = st->watermark & 0xFF;
/*
* watermark stores the number of sets; we need to write the FIFO
* registers with the number of samples
*/
fifo_samples = (st->watermark * st->fifo_set_size);
fifo_ctl = ADXL372_FIFO_CTL_FORMAT_MODE(st->fifo_format) |
ADXL372_FIFO_CTL_MODE_MODE(st->fifo_mode) |
ADXL372_FIFO_CTL_SAMPLES_MODE(st->watermark);
ADXL372_FIFO_CTL_SAMPLES_MODE(fifo_samples);
ret = regmap_write(st->regmap, ADXL372_FIFO_SAMPLES, fifo_samples);
ret = regmap_write(st->regmap,
ADXL372_FIFO_SAMPLES, fifo_samples & 0xFF);
if (ret < 0)
return ret;