# SPDX-License-Identifier: GPL-2.0
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/spi/spi-rockchip.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: Rockchip SPI Controller
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description:
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The Rockchip SPI controller is used to interface with various devices such
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as flash and display controllers using the SPI communication interface.
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allOf:
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- $ref: "spi-controller.yaml#"
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maintainers:
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- Heiko Stuebner <heiko@sntech.de>
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# Everything else is described in the common file
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properties:
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compatible:
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oneOf:
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- const: rockchip,rk3036-spi
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- const: rockchip,rk3066-spi
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- const: rockchip,rk3228-spi
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- const: rockchip,rv1108-spi
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- items:
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- enum:
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- rockchip,px30-spi
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- rockchip,rk3188-spi
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- rockchip,rk3288-spi
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- rockchip,rk3308-spi
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- rockchip,rk3328-spi
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- rockchip,rk3368-spi
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- rockchip,rk3399-spi
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- rockchip,rv1126-spi
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- const: rockchip,rk3066-spi
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reg:
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maxItems: 1
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interrupts:
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maxItems: 1
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clocks:
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items:
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- description: transfer-clock
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- description: peripheral clock
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clock-names:
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items:
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- const: spiclk
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- const: apb_pclk
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dmas:
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items:
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- description: TX DMA Channel
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- description: RX DMA Channel
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dma-names:
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items:
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- const: tx
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- const: rx
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rx-sample-delay-ns:
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default: 0
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description:
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Nano seconds to delay after the SCLK edge before sampling Rx data
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(may need to be fine tuned for high capacitance lines).
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If not specified 0 will be used.
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csm:
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default: 0
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description:
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ss_n be high for half or one sclk_out cycle after every frame data
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is transferred.
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If not specified 0 will be used.
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enum:
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- 0 # keep low
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- 1 # half sclk_out
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- 2 # one sclk_out
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pinctrl-names:
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minItems: 1
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items:
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- const: default
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- const: sleep
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description:
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Names for the pin configuration(s); may be "default" or "sleep",
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where the "sleep" configuration may describe the state
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the pins should be in during system suspend.
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rockchip,poll-only:
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description: Add this property to set the transmission method as CPU polling.
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type: boolean
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required:
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- compatible
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- reg
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- interrupts
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- clocks
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- clock-names
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unevaluatedProperties: false
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examples:
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- |
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#include <dt-bindings/clock/rk3188-cru-common.h>
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#include <dt-bindings/interrupt-controller/arm-gic.h>
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#include <dt-bindings/interrupt-controller/irq.h>
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spi0: spi@ff110000 {
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compatible = "rockchip,rk3066-spi";
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reg = <0xff110000 0x1000>;
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interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
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clocks = <&cru SCLK_SPI0>, <&cru PCLK_SPI0>;
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clock-names = "spiclk", "apb_pclk";
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dmas = <&pdma1 11>, <&pdma1 12>;
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dma-names = "tx", "rx";
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pinctrl-0 = <&spi1_pins>;
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pinctrl-1 = <&spi1_sleep>;
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pinctrl-names = "default", "sleep";
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rx-sample-delay-ns = <10>;
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#address-cells = <1>;
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#size-cells = <0>;
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};
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