1* Rockchip SPI Controller
2
3The Rockchip SPI controller is used to interface with various devices such as flash
4and display controllers using the SPI communication interface.
5
6Required Properties:
7
8- compatible: should be one of the following.
9    "rockchip,rv1108-spi" for rv1108 SoCs.
10    "rockchip,px30-spi", "rockchip,rk3066-spi" for px30 SoCs.
11    "rockchip,rk3036-spi" for rk3036 SoCS.
12    "rockchip,rk3066-spi" for rk3066 SoCs.
13    "rockchip,rk3188-spi" for rk3188 SoCs.
14    "rockchip,rk3228-spi" for rk3228 SoCS.
15    "rockchip,rk3288-spi" for rk3288 SoCs.
16    "rockchip,rk3368-spi" for rk3368 SoCs.
17    "rockchip,rk3399-spi" for rk3399 SoCs.
18- reg: physical base address of the controller and length of memory mapped
19       region.
20- interrupts: The interrupt number to the cpu. The interrupt specifier format
21              depends on the interrupt controller.
22- clocks: Must contain an entry for each entry in clock-names.
23- clock-names: Shall be "spiclk" for the transfer-clock, and "apb_pclk" for
24			   the peripheral clock.
25- #address-cells: should be 1.
26- #size-cells: should be 0.
27
28Optional Properties:
29
30- dmas: DMA specifiers for tx and rx dma. See the DMA client binding,
31		Documentation/devicetree/bindings/dma/dma.txt
32- dma-names: DMA request names should include "tx" and "rx" if present.
33- rx-sample-delay-ns: nanoseconds to delay after the SCLK edge before sampling
34		Rx data (may need to be fine tuned for high capacitance lines).
35		No delay (0) by default.
36- pinctrl-names: Names for the pin configuration(s); may be "default" or
37		"sleep", where the "sleep" configuration may describe the state
38		the pins should be in during system suspend. See also
39		pinctrl/pinctrl-bindings.txt.
40
41
42Example:
43
44	spi0: spi@ff110000 {
45		compatible = "rockchip,rk3066-spi";
46		reg = <0xff110000 0x1000>;
47		dmas = <&pdma1 11>, <&pdma1 12>;
48		dma-names = "tx", "rx";
49		rx-sample-delay-ns = <10>;
50		#address-cells = <1>;
51		#size-cells = <0>;
52		interrupts = <GIC_SPI 44 IRQ_TYPE_LEVEL_HIGH>;
53		clocks = <&cru SCLK_SPI0>, <&cru PCLK_SPI0>;
54		clock-names = "spiclk", "apb_pclk";
55		pinctrl-0 = <&spi1_pins>;
56		pinctrl-1 = <&spi1_sleep>;
57		pinctrl-names = "default", "sleep";
58	};
59