[PATCH v2 4/6] dt-bindings: snps,dw-apb-ssi: Add sparx5, SPI slave snps,rx-sample-delay-ns and microchip,spi-interface2 properties.

[Lars Povlsen <lars.povlsen@xxxxxxxxxxxxx>]

This has the following changes for the snps,dw-apb-ss DT bindings:

- Add "microchip,sparx5-spi" as the compatible for the Sparx5 SoC
controller,

- Add the property "snps,rx-sample-delay-ns" for SPI slaves

- Add the property "microchip,spi-interface2" for SPI slaves

Signed-off-by: Lars Povlsen <lars.povlsen@xxxxxxxxxxxxx>
---
 .../bindings/spi/snps,dw-apb-ssi.yaml         | 24 +++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
index c62cbe79f00dd..5bca4f0493bdf 100644
--- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
+++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml
@@ -36,6 +36,11 @@ properties:
               - mscc,ocelot-spi
               - mscc,jaguar2-spi
           - const: snps,dw-apb-ssi
+      - description: Microchip Sparx5 SoC SPI Controller
+        items:
+          - enum:
+              - microchip,sparx5-spi
+          - const: snps,dw-apb-ssi
       - description: Amazon Alpine SPI Controller
         const: amazon,alpine-dw-apb-ssi
       - description: Renesas RZ/N1 SPI Controller
@@ -107,6 +112,19 @@ patternProperties:
       spi-tx-bus-width:
         const: 1

+      snps,rx-sample-delay-ns:
+        description: SPI Rx sample delay offset, unit is nanoseconds.
+          The delay from the default sample time before the actual
+          sample of the rxd input signal occurs. The "rx_sample_delay"
+          is an optional feature of the designware controller, and the
+          upper limit is also subject to controller configuration.
+        $ref: /schemas/types.yaml#/definitions/uint32
+
+      microchip,spi-interface2:
+        description: indicates the spi device is placed on a special
+          controller interface of the "microchip,sparx5-spi" controller.
+        type: boolean
+
 unevaluatedProperties: false

 required:
@@ -129,5 +147,11 @@ examples:
       num-cs = <2>;
       cs-gpios = <&gpio0 13 0>,
                  <&gpio0 14 0>;
+        spi-flash@1 {
+          compatible = "spi-nand";
+          reg = <1>;
+          microchip,spi-interface2;
+          snps,rx-sample-delay-ns = <7>;
+        };
     };
 ...
--
2.27.0