[PATCH v3 0/4] iio: adc: meson-saradc: add support for Meson S4

[Jonathan Cameron]

On Wed, 25 Mar 2026 15:06:14 +0800
Nick Xie <nick at khadas.com> wrote:

> This series adds support for the SARADC IP block found in the Amlogic
> Meson S4 (S905Y4) SoC and enables it for the Khadas VIM1S board to
> support the onboard ADC 'Function' key.
> 
> There are no known hardware differences between the SARADC on the S4
> and the previous G12A generation. The S4 bindings utilize a fallback
> to G12A, but a dedicated driver match entry is included to ensure the
> correct part name is exposed to the userspace ABI.
> 
Applied patches 1 and 2 to the togreg branch of iio.git.

> Changes in v3:
> - Patch 1: Updated the commit message to explicitly explain why the
>   comment regarding the generic fallback was added.
> - Patch 2: Retained the driver patch and updated the commit message to
>   clarify that the dedicated match entry is kept specifically for
>   userspace ABI naming purposes.
> - Link to v2: https://lore.kernel.org/all/20260323013408.429701-1-nick@khadas.com/
> 
> Changes in v2:
> - Addressed feedback from Krzysztof Kozlowski:
>   - Updated dt-bindings commit message to explain the hardware compatibility.
>   - Separated the S4 compatible string in the YAML bindings to ensure it
>     correctly falls back to the specific "amlogic,meson-g12a-saradc" rather
>     than the generic "amlogic,meson-saradc".
>   - Updated the S4 SoC dtsi to use the correct G12A fallback.
> - Added Martin's Reviewed-by tags where appropriate.
> - Link to v1: https://lore.kernel.org/all/20260228065840.702651-1-nick@khadas.com/
> 
> 
> Nick Xie (4):
>   dt-bindings: iio: adc: amlogic,meson-saradc: add S4 compatible
>   iio: adc: meson-saradc: add support for Meson S4
>   arm64: dts: amlogic: meson-s4: add internal SARADC controller
>   arm64: dts: amlogic: meson-s4-s905y4-khadas-vim1s: add Function key
>     support
> 
>  .../iio/adc/amlogic,meson-saradc.yaml         |  4 ++++
>  .../amlogic/meson-s4-s905y4-khadas-vim1s.dts  | 19 +++++++++++++++++++
>  arch/arm64/boot/dts/amlogic/meson-s4.dtsi     | 14 ++++++++++++++
>  drivers/iio/adc/meson_saradc.c                |  8 ++++++++
>  4 files changed, 45 insertions(+)
>