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+# SPDX-License-Identifier: GPL-2.0-only
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spi/snps,dw-apb-ssi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Synopsys DesignWare AMBA 2.0 Synchronous Serial Interface
+
+maintainers:
+ - Mark Brown <broonie@kernel.org>
+
+allOf:
+ - $ref: "spi-controller.yaml#"
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - mscc,ocelot-spi
+ - mscc,jaguar2-spi
+ then:
+ properties:
+ reg:
+ minItems: 2
+ - if:
+ properties:
+ compatible:
+ contains:
+ enum:
+ - baikal,bt1-sys-ssi
+ then:
+ properties:
+ mux-controls:
+ maxItems: 1
+ required:
+ - mux-controls
+ else:
+ required:
+ - interrupts
+
+properties:
+ compatible:
+ oneOf:
+ - description: Generic DW SPI Controller
+ enum:
+ - snps,dw-apb-ssi
+ - snps,dwc-ssi-1.01a
+ - description: Microsemi Ocelot/Jaguar2 SoC SPI Controller
+ items:
+ - enum:
+ - 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
+ items:
+ - const: renesas,rzn1-spi
+ - const: snps,dw-apb-ssi
+ - description: Intel Keem Bay SPI Controller
+ const: intel,keembay-ssi
+ - description: Baikal-T1 SPI Controller
+ const: baikal,bt1-ssi
+ - description: Baikal-T1 System Boot SPI Controller
+ const: baikal,bt1-sys-ssi
+
+ reg:
+ minItems: 1
+ items:
+ - description: DW APB SSI controller memory mapped registers
+ - description: SPI MST region map or directly mapped SPI ROM
+
+ interrupts:
+ maxItems: 1
+
+ clocks:
+ minItems: 1
+ items:
+ - description: SPI Controller reference clock source
+ - description: APB interface clock source
+
+ clock-names:
+ minItems: 1
+ items:
+ - const: ssi_clk
+ - const: pclk
+
+ resets:
+ maxItems: 1
+
+ reset-names:
+ const: spi
+
+ reg-io-width:
+ $ref: /schemas/types.yaml#/definitions/uint32
+ description: I/O register width (in bytes) implemented by this device
+ default: 4
+ enum: [ 2, 4 ]
+
+ num-cs:
+ default: 4
+ minimum: 1
+ maximum: 4
+
+ dmas:
+ items:
+ - description: TX DMA Channel
+ - description: RX DMA Channel
+
+ dma-names:
+ items:
+ - const: tx
+ - const: rx
+
+ rx-sample-delay-ns:
+ default: 0
+ description: Default value of the rx-sample-delay-ns property.
+ This value will be used if the property is not explicitly defined
+ for a SPI slave device. See below.
+
+patternProperties:
+ "^.*@[0-9a-f]+$":
+ type: object
+ properties:
+ reg:
+ minimum: 0
+ maximum: 3
+
+ spi-rx-bus-width:
+ const: 1
+
+ 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:
+ - compatible
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+ - clocks
+
+examples:
+ - |
+ spi@fff00000 {
+ compatible = "snps,dw-apb-ssi";
+ reg = <0xfff00000 0x1000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ interrupts = <0 154 4>;
+ clocks = <&spi_m_clk>;
+ 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>;
+ };
+ };
+ - |
+ spi@1f040100 {
+ compatible = "baikal,bt1-sys-ssi";
+ reg = <0x1f040100 0x900>,
+ <0x1c000000 0x1000000>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+ mux-controls = <&boot_mux>;
+ clocks = <&ccu_sys>;
+ clock-names = "ssi_clk";
+ };
+...