On the K1 SoC, there is a full-duplex I2S controller.
The I2S is programmable, with the sample width configurable
to 8, 16, 18, or 32 bits.
A dedicated FIFO is provided for transmit (TXFIFO) and another
for receive (RXFIFO). In non-packed mode, both FIFOs are 32
entries deep and 32 bits wide, giving a total of 32 samples each.
The register definitions can be found here[1]
Link:
https://developer.spacemit.com/documentation?token=Rn9Kw3iFHirAMgkIpTAcV2Arnkf#18.2-spi%2Fi2s [1]
Signed-off-by: Troy Mitchell <troy.mitchell@linux.spacemit.com>
---
Changes in v4:
- Patch 1/2:
- nothing
- Patch 2/2:
- add some comments
- adjust supported PCM rates and formats.
- change macros from SSCR_DW_(8|16|18|32)BYTE to SSCR_DW_(8|16|18|32)BIT
- use constraints API in hw_params
- Link to v3: https://lore.kernel.org/r/20250911-k1-i2s-v3-0-57f173732f9c@linux.spacemit.com
Changes in v3:
- Patch 1/2:
- simplify dma-names definition
- Patch 2/2
- remove empty spacemit_i2s_remove()
- move FSRT setup for DSP_A into switch-case in spacemit_i2s_set_fmt()
- Link to v2: https://lore.kernel.org/r/20250828-k1-i2s-v2-0-09e7b40f002c@linux.spacemit.com
Changes in v2:
- Patch 1/2:
- modify commit message
- remove unused third cell from pdma dmas property
- update SPDX license in spacemit,k1-i2s.yaml to (GPL-2.0-only OR BSD-2-Clause)
- Patch 2/2:
- modify commit message
- reset_assert in dai_ops::remove
- select CMA and DMA_CMA in Kconfig
- use devm_reset_control_get_exclusive
- Link to v1: https://lore.kernel.org/r/20250814-k1-i2s-v1-0-c31149b29041@linux.spacemit.com
---
Troy Mitchell (2):
ASoC: dt-bindings: Add bindings for SpacemiT K1
ASoC: spacemit: add i2s support for K1 SoC
.../devicetree/bindings/sound/spacemit,k1-i2s.yaml | 87 ++++
sound/soc/Kconfig | 1 +
sound/soc/Makefile | 1 +
sound/soc/spacemit/Kconfig | 16 +
sound/soc/spacemit/Makefile | 5 +
sound/soc/spacemit/k1_i2s.c | 463 +++++++++++++++++++++
6 files changed, 573 insertions(+)
---
base-commit: 4f010aced22532eea2ef0d9a2f5db7c64a196fec
change-id: 20250813-k1-i2s-115bf65eaac8
Best regards,
--
Troy Mitchell <troy.mitchell@linux.spacemit.com>