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nuttx/drivers/audio
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wangjianyu3 5ba0d062b1 audio: add ES7210 4-ch ADC codec driver 
Add ES7210 audio ADC driver for NuttX implementing the audio
lower-half interface. Supports 4-channel recording via I2S with
configurable sample rate, bit depth, and mic gain.

- drivers/audio/es7210.c: Codec driver using LPWORK for async buffer
  management, I2C register access, and NuttX audio buffer management
- drivers/audio/es7210.h: Internal register definitions and macros
- include/nuttx/audio/es7210.h: Public header with platform config
  structure and es7210_initialize() API
- drivers/audio/Kconfig, Make.defs, CMakeLists.txt: Build system
  integration for CONFIG_AUDIO_ES7210

Key implementation details:
- ES7210_SDP_NORMAL (normal I2S) instead of TDM, matching NuttX
  I2S standard Philips mode
- ES7210_ADC_PGA_POWER_ON bit in gain registers REG43-46, required
  for analog front-end amplifier power-on
- 50ms startup delay in es7210_start for codec clock stabilization
- I2S_IOCTL(AUDIOIOC_STOP) in es7210_stop to notify I2S layer,
  preventing DMA from running without buffers after stop

Signed-off-by: wangjianyu3 <wangjianyu3@xiaomi.com>
2026-04-03 13:34:36 +08:00
..
audio_dma.c
audio_fake.c sched/sleep: replace all Signal-based sleep implement to Scheduled sleep 2025-10-17 14:05:02 +08:00
audio_i2s.c
audio_null.c sched/sleep: replace all Signal-based sleep implement to Scheduled sleep 2025-10-17 14:05:02 +08:00
CMakeLists.txt audio: add ES7210 4-ch ADC codec driver 2026-04-03 13:34:36 +08:00
cs43l22.c
cs43l22.h
cs43l22_debug.c
cs4344.c
cs4344.h
es7210.c audio: add ES7210 4-ch ADC codec driver 2026-04-03 13:34:36 +08:00
es7210.h audio: add ES7210 4-ch ADC codec driver 2026-04-03 13:34:36 +08:00
es8311.c
es8311.h
es8311_debug.c
es8388.c
es8388.h
es8388_debug.c
esxxxx_common.h
Kconfig audio: add ES7210 4-ch ADC codec driver 2026-04-03 13:34:36 +08:00
Make.defs audio: add ES7210 4-ch ADC codec driver 2026-04-03 13:34:36 +08:00
tone.c timers/oneshot: Remove all callback and args. 2025-11-18 13:02:29 +01:00
vs1053.c sched/sleep: replace all Signal-based sleep implement to Scheduled sleep 2025-10-17 14:05:02 +08:00
vs1053.h
wm8776.c
wm8776.h
wm8904.c style: Fix "is is" typo across the codebase. 2026-03-24 09:39:26 +08:00
wm8904.h
wm8904_debug.c
wm8994.c
wm8994.h
wm8994_debug.c