From: Olivier Moysan Date: Wed, 7 Oct 2020 15:34:59 +0000 (+0200) Subject: ASoC: stm32: dfsdm: add actual resolution trace X-Git-Tag: v5.15~2323^2~3^2~27^2 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=41bceb1272164ee2a6fd1ac3bed97043c94b6636;p=platform%2Fkernel%2Flinux-starfive.git ASoC: stm32: dfsdm: add actual resolution trace Add a trace to report actual resolution of audio samples. Signed-off-by: Olivier Moysan Link: https://lore.kernel.org/r/20201007153459.22155-3-olivier.moysan@st.com Signed-off-by: Mark Brown --- diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c index 5e10fb4..b7e9ef1 100644 --- a/drivers/iio/adc/stm32-dfsdm-adc.c +++ b/drivers/iio/adc/stm32-dfsdm-adc.c @@ -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; diff --git a/drivers/iio/adc/stm32-dfsdm.h b/drivers/iio/adc/stm32-dfsdm.h index 5dbdae4..4afc1f5 100644 --- a/drivers/iio/adc/stm32-dfsdm.h +++ b/drivers/iio/adc/stm32-dfsdm.h @@ -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; };