[PATCH v3 0/3] Add PWM-DAC audio support for StarFive JH7110 RISC-V SoC

[Hal Feng]

This patchset adds PWM-DAC audio support for the StarFive JH7110 SoC.
The PWM-DAC module does not require a hardware codec, but a dummy codec is
needed for the driver. The dummy spdif codec driver, which is already
upstream, is compatible with the one which JH7110 PWM-DAC needed. So we
use it as the dummy codec driver for the JH7110 PWM-DAC module.

The third patch depends on tag next-20230809 in linux-next branch.

Changes since v2:
- Rebase on tag v6.5-rc6.
- Drop the component controls.
- Use dev_err_probe() instead of dev_err() in some cases.
- Add a new struct jh7110_pwmdac_cfg to save the configuration.
- Add a new function jh7110_pwmdac_init_params() to initialize the
  parameters.

Changes since v1:
- Rebase on tag v6.5-rc3.
- Drop patch 1 and 2.
- Drop the unneeded space and line in patch 3.
- Use the dummy spdif codec driver instead of adding a new one.
- Change "dai_link->stop_dma_first = 1" to
  "dai_link->trigger_stop = SND_SOC_TRIGGER_ORDER_LDC" in patch 4.
- Drop the unneeded "status = "okay;" in patch 5.
- Change some node names in patch 5.

---
v2: https://lore.kernel.org/all/20230731032829.127864-1-hal.feng@starfivetech.com/
v1: https://lore.kernel.org/all/20230626110909.38718-1-hal.feng@starfivetech.com/

Hal Feng (3):
  ASoC: dt-bindings: Add StarFive JH7110 PWM-DAC controller
  ASoC: starfive: Add JH7110 PWM-DAC driver
  riscv: dts: starfive: Add JH7110 PWM-DAC support

 .../sound/starfive,jh7110-pwmdac.yaml         |  76 +++
 MAINTAINERS                                   |   7 +
 .../jh7110-starfive-visionfive-2.dtsi         | 141 +++++
 arch/riscv/boot/dts/starfive/jh7110.dtsi      | 159 ++++++
 sound/soc/starfive/Kconfig                    |   9 +
 sound/soc/starfive/Makefile                   |   1 +
 sound/soc/starfive/jh7110_pwmdac.c            | 529 ++++++++++++++++++
 7 files changed, 922 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/starfive,jh7110-pwmdac.yaml
 create mode 100644 sound/soc/starfive/jh7110_pwmdac.c


base-commit: 2ccdd1b13c591d306f0401d98dedc4bdcd02b421
-- 
2.38.1