From 5ce78f4456a9b2cb103f5bad9e62636e8d086152 Mon Sep 17 00:00:00 2001 From: Lars Povlsen Date: Mon, 24 Aug 2020 22:30:08 +0200 Subject: [PATCH] dt-bindings: snps, dw-apb-ssi: Add sparx5 support, plus rx-sample-delay-ns property 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 "rx-sample-delay-ns" Signed-off-by: Lars Povlsen Reviewed-by: Rob Herring Link: https://lore.kernel.org/r/20200824203010.2033-5-lars.povlsen@microchip.com Signed-off-by: Mark Brown --- .../devicetree/bindings/spi/snps,dw-apb-ssi.yaml | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) diff --git a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml index c62cbe7..c79c8a1 100644 --- a/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml +++ b/Documentation/devicetree/bindings/spi/snps,dw-apb-ssi.yaml @@ -36,6 +36,8 @@ properties: - mscc,ocelot-spi - mscc,jaguar2-spi - const: snps,dw-apb-ssi + - description: Microchip Sparx5 SoC SPI Controller + const: microchip,sparx5-spi - description: Amazon Alpine SPI Controller const: amazon,alpine-dw-apb-ssi - description: Renesas RZ/N1 SPI Controller @@ -93,6 +95,12 @@ properties: - const: tx - const: rx + rx-sample-delay-ns: + default: 0 + description: Default value of the rx-sample-delay-ns property. + This value will be used if the property is not explicitly defined + for a SPI slave device. See below. + patternProperties: "^.*@[0-9a-f]+$": type: object @@ -107,6 +115,13 @@ patternProperties: spi-tx-bus-width: const: 1 + 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. + unevaluatedProperties: false required: @@ -129,5 +144,11 @@ examples: num-cs = <2>; cs-gpios = <&gpio0 13 0>, <&gpio0 14 0>; + rx-sample-delay-ns = <3>; + spi-flash@1 { + compatible = "spi-nand"; + reg = <1>; + rx-sample-delay-ns = <7>; + }; }; ... -- 2.7.4