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ASoC: atmel: mchp-pdmc: add PDMC driver

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The Pulse Density Microphone Controller (PDMC) interfaces up to 4 digital
microphones having Pulse Density Modulated (PDM) outputs. It generates a
single clock line and samples 1 or 2 data lines. The signal path includes
an audio grade programmable decimation filter and outputs 24-bit audio
words on the APB bus.

Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
Link: https://lore.kernel.org/r/20220307122202.2251639-4-codrin.ciubotariu@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Codrin Ciubotariu 2022-03-07 14:21:59 +02:00 committed by Mark Brown
parent 015044e961
commit 50291652af
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
3 changed files with 1102 additions and 0 deletions
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16
sound/soc/atmel/Kconfig
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@ -160,4 +160,20 @@ config SND_MCHP_SOC_SPDIFRX
This S/PDIF RX driver is compliant with IEC-60958 standard and
includes programmable User Data and Channel Status fields.
config SND_MCHP_SOC_PDMC
tristate "Microchip ASoC driver for boards using PDMC"
depends on OF && (ARCH_AT91 || COMPILE_TEST)
select SND_SOC_GENERIC_DMAENGINE_PCM
select REGMAP_MMIO
help
Say Y or M if you want to add support for Microchip ASoC PDMC driver on the
following Microchip platforms:
- sama7g5
The Pulse Density Microphone Controller (PDMC) interfaces up to 4 digital
microphones PDM outputs. It generates a single clock line and samples 1 or
2 data lines. The signal path includes an audio grade programmable
decimation filter and outputs 24-bit audio words.
endif

2
sound/soc/atmel/Makefile
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@ -7,6 +7,7 @@ snd-soc-atmel-i2s-objs := atmel-i2s.o
snd-soc-mchp-i2s-mcc-objs := mchp-i2s-mcc.o
snd-soc-mchp-spdiftx-objs := mchp-spdiftx.o
snd-soc-mchp-spdifrx-objs := mchp-spdifrx.o
snd-soc-mchp-pdmc-objs := mchp-pdmc.o
# pdc and dma need to both be built-in if any user of
# ssc is built-in.
@ -21,6 +22,7 @@ obj-$(CONFIG_SND_ATMEL_SOC_I2S) += snd-soc-atmel-i2s.o
obj-$(CONFIG_SND_MCHP_SOC_I2S_MCC) += snd-soc-mchp-i2s-mcc.o
obj-$(CONFIG_SND_MCHP_SOC_SPDIFTX) += snd-soc-mchp-spdiftx.o
obj-$(CONFIG_SND_MCHP_SOC_SPDIFRX) += snd-soc-mchp-spdifrx.o
obj-$(CONFIG_SND_MCHP_SOC_PDMC) += snd-soc-mchp-pdmc.o
# AT91 Machine Support
snd-soc-sam9g20-wm8731-objs := sam9g20_wm8731.o

1084
sound/soc/atmel/mchp-pdmc.c Normal file
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