diff options
| author | Olivier Moysan <olivier.moysan@st.com> | 2019-06-19 16:03:50 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2019-06-22 12:29:19 +0300 |
| commit | d716204fd5472631970aa927c773c3302ac70fbe (patch) | |
| tree | 0b07c90fb8c8379810bf8e3e9333a1afba79cd4f /drivers/iio/adc/stm32-dfsdm.h | |
| parent | 102afde62937de32758a023655ed90545c292245 (diff) | |
| download | linux-d716204fd5472631970aa927c773c3302ac70fbe.tar.xz | |
iio: adc: stm32-dfsdm: add fast mode support
The use of fast mode allows to get a larger set of solution
for filter parameters. This can be useful to reach a better
output sample resolution, when fast mode can be used.
Fast mode is selected at startup if it is relevant.
The startup is performed in postenable callback context,
where there are too tight time constraints for filter parameters
computation. For this reason both fast and non fast filter parameters
are pre-computed previously.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Diffstat (limited to 'drivers/iio/adc/stm32-dfsdm.h')
| -rw-r--r-- | drivers/iio/adc/stm32-dfsdm.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/adc/stm32-dfsdm.h b/drivers/iio/adc/stm32-dfsdm.h index 18b06ee6ed7b..5dbdae4ed881 100644 --- a/drivers/iio/adc/stm32-dfsdm.h +++ b/drivers/iio/adc/stm32-dfsdm.h @@ -263,13 +263,13 @@ struct stm32_dfsdm_filter_osr { /** * struct stm32_dfsdm_filter - structure relative to stm32 FDSDM filter * @ford: filter order - * @flo: filter oversampling structure + * @flo: filter oversampling data table indexed by fast mode flag * @sync_mode: filter synchronized with filter 0 * @fast: filter fast mode */ struct stm32_dfsdm_filter { enum stm32_dfsdm_sinc_order ford; - struct stm32_dfsdm_filter_osr flo; + struct stm32_dfsdm_filter_osr flo[2]; unsigned int sync_mode; unsigned int fast; }; |