Re: [PATCH 2/2] dt-bindings: iio: dac: ltc2632: add LTC2654 compatible strings

[Krzysztof Kozlowski]

On Tue, Mar 10, 2026 at 04:32:05PM +0100, David Marinović wrote:
> Add DT compatible strings for the LTC2654 DAC family variants
> supported by the ltc2632 driver.

Describe hardware, not driver.

> 
> Signed-off-by: David Marinovic <david.marinovic@xxxxxxxx>
> ---
>  .../devicetree/bindings/iio/dac/lltc,ltc2632.yaml        | 9 +++++++--
>  1 file changed, 7 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/iio/dac/lltc,ltc2632.yaml
> b/Documentation/devicetree/bindings/iio/dac/lltc,ltc2632.yaml
> index 733edc7d6d17..7ec663beec1a 100644
> --- a/Documentation/devicetree/bindings/iio/dac/lltc,ltc2632.yaml
> +++ b/Documentation/devicetree/bindings/iio/dac/lltc,ltc2632.yaml
> @@ -4,14 +4,15 @@
>  $id: http://devicetree.org/schemas/iio/dac/lltc,ltc2632.yaml#
>  $schema: http://devicetree.org/meta-schemas/core.yaml#
> 
> -title: Linear Technology LTC263x 12-/10-/8-Bit Rail-to-Rail DAC
> +title: Linear Technology LTC263x 12-/10-/8-Bit, LTC2654 16-/12-Bit,
> Rail-to-Rail DAC

There are multiple patch errors here. This is unmergeable.

> 
>  maintainers:
>    - Michael Hennerich <michael.hennerich@xxxxxxxxxx>
> 
>  description: |
> -  Bindings for the Linear Technology LTC2632/2634/2636 DAC
> +  Bindings for the Linear Technology LTC2632/2634/2636/2654 DAC
>    Datasheet can be found here: https://www.analog.com/media/en/technical-documentation/data-sheets/LTC263[246].pdf
> +  Datasheet can be found here:
> https://www.analog.com/media/en/technical-documentation/data-sheets/2654f.pdf
> 
>  properties:
>    compatible:
> @@ -34,6 +35,10 @@ properties:
>        - lltc,ltc2636-h12
>        - lltc,ltc2636-h10
>        - lltc,ltc2636-h8
> +      - lltc,ltc2654-l16
> +      - lltc,ltc2654-l12
> +      - lltc,ltc2654-h16
> +      - lltc,ltc2654-h12

Several look compatible to me, so express it with fallback and drop
unneeded entries in the driver.

> 
>    reg:
>      maxItems: 1
> --
> 2.50.1
> 
> 
> 
> 
> -------- Original Message --------
> Subject: [PATCH 0/2] iio: dac: ltc2632: add support for LTC2654 DAC family
> Date: 10.03.2026 16:27
> From: David Marinović <david.marinovic@xxxxxxxx>
> To: jic23@xxxxxxxxxx
> 
> This patch series adds support for the Linear Technology LTC2654
> quad DAC family to the existing ltc2632 driver.
> 
> The LTC2654 shares the same 24-bit SPI protocol as the existing
> LTC2632/2634/2636 devices, requiring minimal additions to the
> driver.
> 
> The LTC2654L-16 variant has been tested on a Phytec phyCORE-STM32MP1
> board with the DAC connected via SPI1. The driver probes successfully
> and all 4 channels are accessible via the IIO sysfs interface.
> 
> Patch 1 adds the driver support.
> Patch 2 updates the DT bindings documentation.
> 
> David Marinovic (2):
>   iio: dac: ltc2632: add support for LTC2654 DAC family
>   dt-bindings: iio: dac: ltc2632: add LTC2654 compatible strings
> 
> Signed-off-by: David Marinovic <david.marinovic@xxxxxxxx>

What is this?