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cv1800b_adc_setbclk_div() does four 64-bit divisions in a row, which
is rather inefficient on 32-bit systems, and using the plain division
causes a build failure as a result:
ERROR: modpost: "__aeabi_uldivmod" [sound/soc/sophgo/cv1800b-sound-adc.ko] undefined!
Consolidate those into a single division using the div_u64() macro.
Fixes: 4cf8752a03e6 ("ASoC: sophgo: add CV1800B internal ADC codec driver")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Link: https://patch.msgid.link/20260202095323.1233553-1-arnd@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
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Restore the empty line that was accidentally removed earlier
Signed-off-by: Anton D. Stavinskii <stavinsky@gmail.com>
Link: https://patch.msgid.link/20260127-incremental-for-i2s-dvier-v2-2-5f66b841f63d@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Add comments to cv1800b_dac_mute() and its caller to explain how the
overwrite mechanism works and why we force it off before playback.
Signed-off-by: Anton D. Stavinskii <stavinsky@gmail.com>
Link: https://patch.msgid.link/20260127-incremental-for-i2s-dvier-v2-1-5f66b841f63d@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Codec DAI endpoint for TXDAC. The codec does only a few things
- set up decimation
- enable codec and I2S output
- ensures the driver doesn't have dac overwrite enabled. (unmute the
output)
Signed-off-by: Anton D. Stavinskii <stavinsky@gmail.com>
Link: https://patch.msgid.link/20260120-cv1800b-i2s-driver-v4-5-6ef787dc6426@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Codec DAI endpoint for RXADC + basic controls.
THe codec have basic volume control. Which is
imlemented by lookup table for simplicity.
The codec expects set_sysclk callback to
adjust internal mclk divider.
Signed-off-by: Anton D. Stavinskii <stavinsky@gmail.com>
Link: https://patch.msgid.link/20260120-cv1800b-i2s-driver-v4-4-6ef787dc6426@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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The actual CPU DAI controller. The driver can be used with
simple-audio-card. It respects fixed clock configuration
from simple-audio-card. The card driver can request direction out,
this will be interpreted as mclk out, the clock which can be used
in other CPU or codecs. For example I2S3 generates clock for ADC.
I2S was tested in S24_32 and S16 dual channel formats.
Signed-off-by: Anton D. Stavinskii <stavinsky@gmail.com>
Link: https://patch.msgid.link/20260120-cv1800b-i2s-driver-v4-2-6ef787dc6426@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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