Bindings/spi/omap-spi.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/omap-spi.yaml#
   5 $schema: http://devicetree.org/meta-schemas/core.yaml#
   6
   7 title: SPI Controller on OMAP and K3 SoCs
   8
   9 maintainers:
  10   - Aswath Govindraju <a-govindraju@ti.com>
  11
  12 allOf:
  13   - $ref: spi-controller.yaml#
  14
  15 properties:
  16   compatible:
  17     oneOf:
  18       - items:
  19           - enum:
  20               - ti,am654-mcspi
  21               - ti,am4372-mcspi
  22           - const: ti,omap4-mcspi
  23       - items:
  24           - enum:
  25               - ti,omap2-mcspi
  26               - ti,omap4-mcspi
  27
  28   reg:
  29     maxItems: 1
  30
  31   interrupts:
  32     maxItems: 1
  33
  34   clocks:
  35     maxItems: 1
  36
  37   power-domains:
  38     maxItems: 1
  39
  40   ti,spi-num-cs:
  41     $ref: /schemas/types.yaml#/definitions/uint32
  42     description: Number of chipselect supported  by the instance.
  43     minimum: 1
  44     maximum: 4
  45
  46   ti,hwmods:
  47     $ref: /schemas/types.yaml#/definitions/string
  48     description:
  49       Must be "mcspi<n>", n being the instance number (1-based).
  50       This property is applicable only on legacy platforms mainly omap2/3
  51       and ti81xx and should not be used on other platforms.
  52     deprecated: true
  53
  54   ti,pindir-d0-out-d1-in:
  55     description:
  56       Select the D0 pin as output and D1 as input. The default is D0
  57       as input and D1 as output.
  58     type: boolean
  59
  60   dmas:
  61     description:
  62       List of DMA specifiers with the controller specific format as
  63       described in the generic DMA client binding. A tx and rx
  64       specifier is required for each chip select.
  65     minItems: 1
  66     maxItems: 8
  67
  68   dma-names:
  69     description:
  70       List of DMA request names. These strings correspond 1:1 with
  71       the DMA specifiers listed in dmas. The string names is to be
  72       "rxN" and "txN" for RX and TX requests, respectively. Where N
  73       is the chip select number.
  74     minItems: 1
  75     maxItems: 8
  76
  77 required:
  78   - compatible
  79   - reg
  80   - interrupts
  81
  82 unevaluatedProperties: false
  83
  84 if:
  85   properties:
  86     compatible:
  87       enum:
  88         - ti,omap2-mcspi
  89         - ti,omap4-mcspi
  90
  91 then:
  92   properties:
  93     ti,hwmods:
  94       items:
  95         - pattern: "^mcspi([1-9])$"
  96
  97 else:
  98   properties:
  99     ti,hwmods: false
 100
 101 examples:
 102   - |
 103     #include <dt-bindings/interrupt-controller/irq.h>
 104     #include <dt-bindings/interrupt-controller/arm-gic.h>
 105     #include <dt-bindings/soc/ti,sci_pm_domain.h>
 106
 107     spi@2100000 {
 108       compatible = "ti,am654-mcspi","ti,omap4-mcspi";
 109       reg = <0x2100000 0x400>;
 110       interrupts = <GIC_SPI 184 IRQ_TYPE_LEVEL_HIGH>;
 111       clocks = <&k3_clks 137 1>;
 112       power-domains = <&k3_pds 137 TI_SCI_PD_EXCLUSIVE>;
 113       #address-cells = <1>;
 114       #size-cells = <0>;
 115       dmas = <&main_udmap 0xc500>, <&main_udmap 0x4500>;
 116       dma-names = "tx0", "rx0";
 117     };