Documentation/devicetree/bindings/spi/renesas,rspi.yaml

   1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
   2 %YAML 1.2
   3 ---
   4 $id: http://devicetree.org/schemas/spi/renesas,rspi.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: Renesas (Quad) Serial Peripheral Interface (RSPI/QSPI)
   8
   9 maintainers:
  10   - Geert Uytterhoeven <geert+renesas@glider.be>
  11
  12 properties:
  13   compatible:
  14     oneOf:
  15       - items:
  16           - enum:
  17               - renesas,rspi-sh7757    # SH7757
  18           - const: renesas,rspi        # Legacy SH
  19
  20       - items:
  21           - enum:
  22               - renesas,rspi-r7s72100  # RZ/A1H
  23               - renesas,rspi-r7s9210   # RZ/A2
  24           - const: renesas,rspi-rz     # RZ/A
  25
  26       - items:
  27           - enum:
  28               - renesas,qspi-r8a7743   # RZ/G1M
  29               - renesas,qspi-r8a7744   # RZ/G1N
  30               - renesas,qspi-r8a7745   # RZ/G1E
  31               - renesas,qspi-r8a77470  # RZ/G1C
  32               - renesas,qspi-r8a7790   # R-Car H2
  33               - renesas,qspi-r8a7791   # R-Car M2-W
  34               - renesas,qspi-r8a7792   # R-Car V2H
  35               - renesas,qspi-r8a7793   # R-Car M2-N
  36               - renesas,qspi-r8a7794   # R-Car E2
  37           - const: renesas,qspi        # R-Car Gen2 and RZ/G1
  38
  39   reg:
  40     maxItems: 1
  41
  42   interrupts:
  43     oneOf:
  44       - items:
  45           - description: A combined interrupt
  46       - items:
  47           - description: Error interrupt (SPEI)
  48           - description: Receive Interrupt (SPRI)
  49           - description: Transmit Interrupt (SPTI)
  50
  51   interrupt-names:
  52     oneOf:
  53       - items:
  54           - const: mux
  55       - items:
  56           - const: error
  57           - const: rx
  58           - const: tx
  59
  60   clocks:
  61     maxItems: 1
  62
  63   power-domains:
  64     maxItems: 1
  65
  66   resets:
  67     maxItems: 1
  68
  69   dmas:
  70     description:
  71       Must contain a list of pairs of references to DMA specifiers, one for
  72       transmission, and one for reception.
  73
  74   dma-names:
  75     minItems: 2
  76     maxItems: 4
  77     items:
  78       enum:
  79         - tx
  80         - rx
  81
  82   num-cs:
  83     description: |
  84       Total number of native chip selects.
  85       Hardware limitations related to chip selects:
  86         - When using GPIO chip selects, at least one native chip select must
  87           be left unused, as it will be driven anyway.
  88     minimum: 1
  89     maximum: 2
  90     default: 1
  91
  92 required:
  93   - compatible
  94   - reg
  95   - interrupts
  96   - clocks
  97   - power-domains
  98   - '#address-cells'
  99   - '#size-cells'
 100
 101 allOf:
 102   - $ref: spi-controller.yaml#
 103   - if:
 104       properties:
 105         compatible:
 106           contains:
 107             enum:
 108               - renesas,rspi-rz
 109     then:
 110       properties:
 111         interrupts:
 112           minItems: 3
 113       required:
 114         - interrupt-names
 115
 116   - if:
 117       properties:
 118         compatible:
 119           contains:
 120             enum:
 121               - renesas,qspi
 122     then:
 123       required:
 124         - resets
 125
 126 examples:
 127   - |
 128     #include <dt-bindings/clock/r8a7791-cpg-mssr.h>
 129     #include <dt-bindings/interrupt-controller/arm-gic.h>
 130     #include <dt-bindings/power/r8a7791-sysc.h>
 131
 132     qspi: spi@e6b10000 {
 133             compatible = "renesas,qspi-r8a7791", "renesas,qspi";
 134             reg = <0xe6b10000 0x2c>;
 135             interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
 136             clocks = <&cpg CPG_MOD 917>;
 137             dmas = <&dmac0 0x17>, <&dmac0 0x18>, <&dmac1 0x17>, <&dmac1 0x18>;
 138             dma-names = "tx", "rx", "tx", "rx";
 139             power-domains = <&sysc R8A7791_PD_ALWAYS_ON>;
 140             resets = <&cpg 917>;
 141             num-cs = <1>;
 142             #address-cells = <1>;
 143             #size-cells = <0>;
 144     };