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1Device tree configuration for Renesas RSPI/QSPI driver
2
3Required properties:
4- compatible       : For Renesas Serial Peripheral Interface on legacy SH:
5		     "renesas,rspi-<soctype>", "renesas,rspi" as fallback.
6		     For Renesas Serial Peripheral Interface on RZ/A1H:
7		     "renesas,rspi-<soctype>", "renesas,rspi-rz" as fallback.
8		     For Quad Serial Peripheral Interface on R-Car Gen2 and
9		     RZ/G1 devices:
10		     "renesas,qspi-<soctype>", "renesas,qspi" as fallback.
11		     Examples with soctypes are:
12		        - "renesas,rspi-sh7757" (SH)
13			- "renesas,rspi-r7s72100" (RZ/A1H)
14			- "renesas,qspi-r8a7743" (RZ/G1M)
15			- "renesas,qspi-r8a7745" (RZ/G1E)
16			- "renesas,qspi-r8a7790" (R-Car H2)
17			- "renesas,qspi-r8a7791" (R-Car M2-W)
18			- "renesas,qspi-r8a7792" (R-Car V2H)
19			- "renesas,qspi-r8a7793" (R-Car M2-N)
20			- "renesas,qspi-r8a7794" (R-Car E2)
21- reg              : Address start and address range size of the device
22- interrupts       : A list of interrupt-specifiers, one for each entry in
23		     interrupt-names.
24		     If interrupt-names is not present, an interrupt specifier
25		     for a single muxed interrupt.
26- interrupt-names  : A list of interrupt names. Should contain (if present):
27		       - "error" for SPEI,
28		       - "rx" for SPRI,
29		       - "tx" to SPTI,
30		       - "mux" for a single muxed interrupt.
31- num-cs	   : Number of chip selects. Some RSPI cores have more than 1.
32- #address-cells   : Must be <1>
33- #size-cells      : Must be <0>
34
35Optional properties:
36- clocks           : Must contain a reference to the functional clock.
37- dmas             : Must contain a list of two references to DMA specifiers,
38		     one for transmission, and one for reception.
39- dma-names        : Must contain a list of two DMA names, "tx" and "rx".
40
41Pinctrl properties might be needed, too.  See
42Documentation/devicetree/bindings/pinctrl/renesas,*.
43
44Examples:
45
46	spi0: spi@e800c800 {
47		compatible = "renesas,rspi-r7s72100", "renesas,rspi-rz";
48		reg = <0xe800c800 0x24>;
49		interrupts = <0 238 IRQ_TYPE_LEVEL_HIGH>,
50			     <0 239 IRQ_TYPE_LEVEL_HIGH>,
51			     <0 240 IRQ_TYPE_LEVEL_HIGH>;
52		interrupt-names = "error", "rx", "tx";
53		interrupt-parent = <&gic>;
54		num-cs = <1>;
55		#address-cells = <1>;
56		#size-cells = <0>;
57	};
58
59	spi: spi@e6b10000 {
60		compatible = "renesas,qspi-r8a7791", "renesas,qspi";
61		reg = <0 0xe6b10000 0 0x2c>;
62		interrupt-parent = <&gic>;
63		interrupts = <0 184 IRQ_TYPE_LEVEL_HIGH>;
64		clocks = <&mstp9_clks R8A7791_CLK_QSPI_MOD>;
65		num-cs = <1>;
66		#address-cells = <1>;
67		#size-cells = <0>;
68		dmas = <&dmac0 0x17>, <&dmac0 0x18>;
69		dma-names = "tx", "rx";
70	};
71