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| author | Olivier Moysan <olivier.moysan@st.com> | 2019-06-19 16:03:48 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-09-19 10:09:40 +0300 |
| commit | 0ae0c43abcbfa957219e4d3c6e808459c0e681b7 (patch) | |
| tree | e2b7769708093251ba9c9f26dbd5226ce0b6afea /drivers | |
| parent | acf77c411b4e26847deea53d60e9af38699d9d49 (diff) | |
| download | linux-0ae0c43abcbfa957219e4d3c6e808459c0e681b7.tar.xz | |
iio: adc: stm32-dfsdm: fix data type
commit c6013bf50e2a2a94ab3d012e191096432aa50c6f upstream.
Fix the data type as DFSDM raw output is complements 2,
24bits left aligned in a 32-bit register.
This change does not affect AUDIO path
- Set data as signed for IIO (as for AUDIO)
- Set 8 bit right shift for IIO.
The 8 LSBs bits of data contains channel info and are masked.
Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Fixes: e2e6771c6462 ("IIO: ADC: add STM32 DFSDM sigma delta ADC support")
Acked-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/iio/adc/stm32-dfsdm-adc.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index 15a115210108..f5586dd6414d 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -981,11 +981,11 @@ static int stm32_dfsdm_adc_chan_init_one(struct iio_dev *indio_dev, ch->info_mask_shared_by_all = BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO); if (adc->dev_data->type == DFSDM_AUDIO) { - ch->scan_type.sign = 's'; ch->ext_info = dfsdm_adc_audio_ext_info; } else { - ch->scan_type.sign = 'u'; + ch->scan_type.shift = 8; } + ch->scan_type.sign = 's'; ch->scan_type.realbits = 24; ch->scan_type.storagebits = 32; |