On Wed, 11 Oct 2017 09:35:32 +0300 Eugen Hristev <eugen.hris...@microchip.com> wrote:
> Change driver settings to use maximum sample rate clock. > This is useful to achieve best possible sampling rate > if we use DMA. > > Signed-off-by: Eugen Hristev <eugen.hris...@microchip.com> I would normally expect this to have some bearing on the noise levels on the measured signals. All I can find is a reference to the track time being 15*a single clock cycle. We could change this so that it is appropriate for the currently samping frequency rather than leaving it as a fixed value. Jonathan > --- > drivers/iio/adc/at91-sama5d2_adc.c | 2 +- > 1 file changed, 1 insertion(+), 1 deletion(-) > > diff --git a/drivers/iio/adc/at91-sama5d2_adc.c > b/drivers/iio/adc/at91-sama5d2_adc.c > index 7e51ecb..b76f88f 100644 > --- a/drivers/iio/adc/at91-sama5d2_adc.c > +++ b/drivers/iio/adc/at91-sama5d2_adc.c > @@ -934,7 +934,7 @@ static void at91_adc_hw_init(struct at91_adc_state *st) > at91_adc_writel(st, AT91_SAMA5D2_MR, > AT91_SAMA5D2_MR_TRANSFER(2) | AT91_SAMA5D2_MR_ANACH); > > - at91_adc_setup_samp_freq(st, st->soc_info.min_sample_rate); > + at91_adc_setup_samp_freq(st, st->soc_info.max_sample_rate); > } > > static ssize_t at91_adc_get_fifo_state(struct device *dev,
