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 v5:
- Patch 1/2:
  - nothing
- Patch 2/2:
  - dont't read sspsp value in spacemit_i2s_init()
  - set SSPSP_FSRT bit for DSP_A mode (was missing in previous version)
- Link to v4: https://lore.kernel.org/all/20250921-k1-i2s-v4-0-4f819f50e468@linux.spacemit.com/

Changes in v4:
- Patch 1/2:
  - nothing
- Patch 2/2:
  - Only 8k, 16k and 48k rates are supported
  - Only 16-bit and 32-bit are supported
  - Use the runtime constraint API instead of modifying dai->driver
- 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                        | 458 +++++++++++++++++++++
 6 files changed, 568 insertions(+)
---
base-commit: 4f010aced22532eea2ef0d9a2f5db7c64a196fec
change-id: 20250813-k1-i2s-115bf65eaac8

Best regards,
-- 
Troy Mitchell <troy.mitchell@linux.spacemit.com>

On Fri, 17 Oct 2025 11:16:16 +0800, Troy Mitchell wrote:
> 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.
> 
> [...]

Applied to

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next

Thanks!

[1/2] ASoC: dt-bindings: Add bindings for SpacemiT K1
      commit: 73978d274eba0d9081bc9b5aedebb0bc6abb832c
[2/2] ASoC: spacemit: add i2s support for K1 SoC
      commit: fce217449075d59b29052b8cdac567f0f3e22641

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

On Fri, Oct 17, 2025 at 11:16:16AM +0800, Troy Mitchell wrote:
> 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 v5:
> - Patch 1/2:
>   - nothing
> - Patch 2/2:
>   - dont't read sspsp value in spacemit_i2s_init()
>   - set SSPSP_FSRT bit for DSP_A mode (was missing in previous version)
The changelog here is wrong..
Correct version:
    - do not set SSPSP_FSRT for DSP_B

Best regards,
Troy
> - Link to v4: https://lore.kernel.org/all/20250921-k1-i2s-v4-0-4f819f50e468@linux.spacemit.com/
>