1Synopsys DesignWare AMBA 2.0 Synchronous Serial Interface
2and Synopsys DesignWare High Performance Synchronous Serial Interface
3
4Required properties:
5- compatible : One of
6  "altr,socfpga-spi",
7  "altr,socfpga-arria10-spi",
8  "canaan,kendryte-k210-spi",
9  "canaan,kendryte-k210-ssi",
10  "intel,stratix10-spi",
11  "intel,agilex-spi",
12  "mscc,ocelot-spi",
13  or "mscc,jaguar2-spi";
14  and one of
15  "snps,dw-apb-ssi-3.20a",
16  "snps,dw-apb-ssi-3.22a",
17  "snps,dw-apb-ssi-3.23",
18  "snps,dw-apb-ssi-4.00a",
19  "snps,dw-apb-ssi-4.01",
20  or "snps,dwc-ssi-1.01a".
21  "snps,dw-apb-ssi" may also be used, but is deprecated in favor of specific
22  version strings.
23- reg : The register base for the controller. For "mscc,<soc>-spi", a second
24  register set is required (named ICPU_CFG:SPI_MST)
25- #address-cells : <1>, as required by generic SPI binding.
26- #size-cells : <0>, also as required by generic SPI binding.
27- clocks : phandles for the clocks, see the description of clock-names below.
28   The phandle for the "ssi_clk" is required. The phandle for the "pclk" clock
29   is optional. If a single clock is specified but no clock-name, it is the
30   "ssi_clk" clock. If both clocks are listed, the "ssi_clk" must be first.
31
32Optional properties:
33- clock-names : Contains the names of the clocks:
34    "ssi_clk", for the core clock used to generate the external SPI clock.
35    "pclk", the interface clock, required for register access.
36- cs-gpios : Specifies the gpio pins to be used for chipselects.
37- num-cs : The number of chipselects. If omitted, this will default to 4.
38- reg-io-width : The I/O register width (in bytes) implemented by this
39  device.  Supported values are 2 or 4 (the default).
40
41Child nodes as per the generic SPI binding.
42
43Example:
44
45	spi@fff00000 {
46		compatible = "altr,socfpga-arria10-spi",
47			     "snps,dw-apb-ssi-4.00a", "snps,dw-apb-ssi";
48		reg = <0xfff00000 0x1000>;
49		interrupts = <0 154 4>;
50		#address-cells = <1>;
51		#size-cells = <0>;
52		clocks = <&spi_m_clk>;
53		num-cs = <2>;
54		cs-gpios = <&gpio0 13 0>,
55			   <&gpio0 14 0>;
56	};
57