davinci-mcbsp.yaml

  1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
  2%YAML 1.2
  3---
  4$id: http://devicetree.org/schemas/sound/davinci-mcbsp.yaml#
  5$schema: http://devicetree.org/meta-schemas/core.yaml#
  6
  7title: McBSP Controller for TI SoCs
  8
  9maintainers:
 10  - Bastien Curutchet <bastien.curutchet@bootlin.com>
 11
 12allOf:
 13  - $ref: dai-common.yaml#
 14
 15properties:
 16  compatible:
 17    enum:
 18      - ti,da850-mcbsp
 19
 20  reg:
 21    minItems: 1
 22    items:
 23      - description: CFG registers
 24      - description: data registers
 25
 26  reg-names:
 27    minItems: 1
 28    items:
 29      - const: mpu
 30      - const: dat
 31
 32  dmas:
 33    items:
 34      - description: transmission DMA channel
 35      - description: reception DMA channel
 36
 37  dma-names:
 38    items:
 39      - const: tx
 40      - const: rx
 41
 42  interrupts:
 43    items:
 44      - description: RX interrupt
 45      - description: TX interrupt
 46
 47  interrupt-names:
 48    items:
 49      - const: rx
 50      - const: tx
 51
 52  clocks:
 53    minItems: 1
 54    items:
 55      - description: functional clock
 56      - description: external input clock for sample rate generator.
 57
 58  clock-names:
 59    minItems: 1
 60    items:
 61      - const: fck
 62      - const: clks
 63
 64  power-domains:
 65    maxItems: 1
 66
 67  "#sound-dai-cells":
 68    const: 0
 69
 70  ti,T1-framing-tx:
 71    $ref: /schemas/types.yaml#/definitions/flag
 72    description:
 73      If the property is present, tx data delay is set to 2 bit clock periods.
 74      McBSP will insert a blank period (high-impedance period) before the first
 75      data bit. This can be used to interface to T1-framing devices.
 76
 77  ti,T1-framing-rx:
 78    $ref: /schemas/types.yaml#/definitions/flag
 79    description:
 80      If the property is present, rx data delay is set to 2 bit clock periods.
 81      McBSP will discard the bit preceding the data stream (called framing bit).
 82      This can be used to interface to T1-framing devices.
 83
 84required:
 85  - "#sound-dai-cells"
 86  - compatible
 87  - reg
 88  - reg-names
 89  - dmas
 90  - dma-names
 91  - clocks
 92
 93unevaluatedProperties: false
 94
 95examples:
 96  - |
 97    mcbsp0@1d10000 {
 98      #sound-dai-cells = <0>;
 99      compatible = "ti,da850-mcbsp";
100      pinctrl-names = "default";
101      pinctrl-0 = <&mcbsp0_pins>;
102
103      reg = <0x111000 0x1000>,
104            <0x311000 0x1000>;
105      reg-names = "mpu", "dat";
106      interrupts = <97>, <98>;
107      interrupt-names = "rx", "tx";
108      dmas = <&edma0 3 1>,
109             <&edma0 2 1>;
110      dma-names = "tx", "rx";
111
112      clocks = <&psc1 14>;
113    };