[PATCH v2] dt-bindings: trivial-devices: Document spi-cpha and spi-cpol

[Fabio Estevam]

Hi Krzysztof,

On Sat, Aug 31, 2024 at 3:23 AM Krzysztof Kozlowski <krzk at kernel.org> wrote:

> No, this does not look correct. Why suddenly all devices get CPHA/CPOL?
> This is supposed to be only for devices REALLY needing it (as discussed
> with patch moving it out of spi-peripheral-props, did anything change
> here?).

I tried like to apply spi-cpha and spi-cpol only to elgin,jg10309-01:

--- a/Documentation/devicetree/bindings/trivial-devices.yaml
+++ b/Documentation/devicetree/bindings/trivial-devices.yaml
@@ -419,6 +419,17 @@ properties:
           - vicor,pli1209bc
             # Winbond/Nuvoton H/W Monitor
           - winbond,w83793
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - elgin,jg10309-01
+    then:
+      properties:
+        spi-cpha: true
+        spi-cpol: true

 required:
   - compatible

but that did not help:

$ make CHECK_DTBS=y rockchip/rv1108-elgin-r1.dtb -j12

  DTC [C] arch/arm/boot/dts/rockchip/rv1108-elgin-r1.dtb
/home/fabio/linux-next/arch/arm/boot/dts/rockchip/rv1108-elgin-r1.dtb:
display at 0: 'spi-cpha', 'spi-cpol' do not match any of the regexes:
'pinctrl-[0-9]+'
from schema $id: http://devicetree.org/schemas/trivial-devices.yaml#

I would appreciate a suggestion on how to fix the warning.

Thanks