[PATCH v2 0/9] ASoC: ux500: Migrate HREF and Samsung audio to audio-graph-card2

The Ux500 HREF500 and HREF520 audio support still relies on a
MOP500-specific machine driver and ad-hoc text bindings.

Convert the MSP binding to DT schema and make the MSP and AB8500 codec
nodes proper sound DAI providers with audio graph ports. Document the
sparse TDM slot masks already parsed from audio graph endpoints.

Describe the fixed DSP_A or DSP_B format, codec clock-provider role,
TDM frame and active slots through endpoint graphs. Add two-link
audio-graph-card2 cards for HREF500, HREF520 and the seven supported
Samsung U8500 phones.

Keep the codec-provided bit and frame clocks running continuously on the
HREF and Samsung links. This matches the legacy machine driver for HREF
and the product kernels for Samsung, and was verified on Skomer.

Remove the MOP500 machine driver after moving its fixed clock and link
policy into the device trees.

This intentionally breaks the device tree ABI with older Ux500 HREF
device trees. The old binding and driver have been broken for years and
need a clean restart.

The series has been tested on HREF500, HREF520 and Samsung phones.

MERGING STRATEGY:

- Get DT bindings ACKed
- Lee merges the MFD binding patch
- Mark merges the ASoC bits including the MOP500 binding removal
- I merge the top commits with DTS changes and defconfig

Assisted-by: LLM
Signed-off-by: Linus Walleij <linusw@kernel.org>
---
Changes in v2:
- Keep the HREF and Samsung codec clocks running continuously.
- Rework the HREF and Samsung cards around audio-graph-card2.
- Describe the DAI links through provider endpoint graphs.
- Document sparse TDM slot masks on audio graph endpoints.
- Link to v1: https://lore.kernel.org/r/20260911-ux500-simple-sound-v1-0-6771ac714e82@kernel.org (local)

---
Linus Walleij (9):
      ASoC: dt-bindings: sound: Prepare Ux500 audio graph links
      mfd: dt-bindings: ab8500: Describe codec graph and microphone wiring
      ASoC: dt-bindings: ux500: Remove MOP500 sound card binding
      ASoC: ab8500: Skip digital microphone support on AB8505
      ASoC: ux500: Remove the MOP500 machine driver
      ARM: dts: ux500: Add sound DAI provider cells
      ARM: dts: ux500: Convert HREF audio to audio-graph-card2
      ARM: dts: ux500: Add Samsung phone audio graphs
      ARM: config: u8500: Enable audio graph card2

 .../devicetree/bindings/mfd/stericsson,ab8500.yaml |  28 ++
 .../bindings/sound/audio-graph-port.yaml           |  10 +-
 .../bindings/sound/stericsson,ux500-msp-i2s.yaml   |  96 +++++
 .../devicetree/bindings/sound/ux500-mop500.txt     |  39 --
 .../devicetree/bindings/sound/ux500-msp.txt        |  42 --
 arch/arm/boot/dts/st/ste-ab8500.dtsi               |   7 +-
 arch/arm/boot/dts/st/ste-ab8505.dtsi               |   7 +-
 arch/arm/boot/dts/st/ste-dbx5x0.dtsi               |   9 +-
 arch/arm/boot/dts/st/ste-href-ab8500.dtsi          | 104 +++++
 arch/arm/boot/dts/st/ste-href-ab8505.dtsi          | 118 ++++--
 .../boot/dts/st/ste-ux500-samsung-codina-tmo.dts   |   1 +
 arch/arm/boot/dts/st/ste-ux500-samsung-codina.dts  |  21 +
 arch/arm/boot/dts/st/ste-ux500-samsung-gavini.dts  |   5 +
 arch/arm/boot/dts/st/ste-ux500-samsung-golden.dts  |   1 +
 arch/arm/boot/dts/st/ste-ux500-samsung-janice.dts  |   1 +
 arch/arm/boot/dts/st/ste-ux500-samsung-kyle.dts    |   1 +
 arch/arm/boot/dts/st/ste-ux500-samsung-skomer.dts  |   1 +
 arch/arm/boot/dts/st/ste-ux500-samsung.dtsi        |  77 ++++
 arch/arm/configs/u8500_defconfig                   |   2 +-
 sound/soc/codecs/ab8500-codec.c                    | 144 ++++---
 sound/soc/ux500/Kconfig                            |  23 +-
 sound/soc/ux500/Makefile                           |   3 -
 sound/soc/ux500/mop500.c                           | 167 --------
 sound/soc/ux500/mop500_ab8500.c                    | 437 ---------------------
 sound/soc/ux500/mop500_ab8500.h                    |  17 -
 25 files changed, 528 insertions(+), 833 deletions(-)
---
base-commit: f41d0fbffacda2322a25d2918191a462fe79667e
change-id: 20260903-ux500-simple-sound-d077d5486a72

Best regards,
-- 
Linus Walleij [off-list ref]