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ASoC: stm32: dfsdm: add actual resolution trace

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Add a trace to report actual resolution of audio samples.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Link: https://lore.kernel.org/r/20201007153459.22155-3-olivier.moysan@st.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Olivier Moysan 2020-10-07 17:34:59 +02:00 committed by Mark Brown
parent 6101bf7119
commit 41bceb1272
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GPG Key ID: 24D68B725D5487D0
2 changed files with 6 additions and 0 deletions
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4
drivers/iio/adc/stm32-dfsdm-adc.c
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@ -293,6 +293,7 @@ static int stm32_dfsdm_compute_osrs(struct stm32_dfsdm_filter *fl,
max >>= flo->rshift;
}
flo->max = (s32)max;
flo->bits = bits;
pr_debug("%s: fast %d, fosr %d, iosr %d, res 0x%llx/%d bits, rshift %d, lshift %d\n",
__func__, fast, flo->fosr, flo->iosr,
@ -476,6 +477,9 @@ static int stm32_dfsdm_channels_configure(struct iio_dev *indio_dev,
if (!flo->res)
return -EINVAL;
dev_dbg(&indio_dev->dev, "Samples actual resolution: %d bits",
min(flo->bits, (u32)DFSDM_DATA_RES - 1));
for_each_set_bit(bit, &adc->smask,
sizeof(adc->smask) * BITS_PER_BYTE) {
chan = indio_dev->channels + bit;

2
drivers/iio/adc/stm32-dfsdm.h
View File

@ -249,6 +249,7 @@ enum stm32_dfsdm_sinc_order {
* @rshift: output sample right shift (hardware shift)
* @lshift: output sample left shift (software shift)
* @res: output sample resolution
* @bits: output sample resolution in bits
* @max: output sample maximum positive value
*/
struct stm32_dfsdm_filter_osr {
@ -257,6 +258,7 @@ struct stm32_dfsdm_filter_osr {
unsigned int rshift;
unsigned int lshift;
u64 res;
u32 bits;
s32 max;
};