xref: /freebsd/sys/contrib/device-tree/Bindings/sound/rockchip,pdm.yaml (revision b197d4b893974c9eb4d7b38704c6d5c486235d6f) 
1# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/sound/rockchip,pdm.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Rockchip PDM controller
8
9description:
10  The Pulse Density Modulation Interface Controller (PDMC) is
11  a PDM interface controller and decoder that support PDM format.
12  It integrates a clock generator driving the PDM microphone
13  and embeds filters which decimate the incoming bit stream to
14  obtain most common audio rates.
15
16maintainers:
17  - Heiko Stuebner <heiko@sntech.de>
18
19properties:
20  compatible:
21    enum:
22      - rockchip,pdm
23      - rockchip,px30-pdm
24      - rockchip,rk1808-pdm
25      - rockchip,rk3308-pdm
26      - rockchip,rk3568-pdm
27      - rockchip,rv1126-pdm
28
29  reg:
30    maxItems: 1
31
32  interrupts:
33    maxItems: 1
34
35  clocks:
36    items:
37      - description: clock for PDM controller
38      - description: clock for PDM BUS
39
40  clock-names:
41    items:
42      - const: pdm_clk
43      - const: pdm_hclk
44
45  dmas:
46    maxItems: 1
47
48  dma-names:
49    items:
50      - const: rx
51
52  power-domains:
53    maxItems: 1
54
55  resets:
56    items:
57      - description: reset for PDM controller
58
59  reset-names:
60    items:
61      - const: pdm-m
62
63  rockchip,path-map:
64    $ref: /schemas/types.yaml#/definitions/uint32-array
65    description:
66      Defines the mapping of PDM SDIx to PDM PATHx.
67      By default, they are mapped one-to-one.
68    maxItems: 4
69    uniqueItems: true
70    items:
71      enum: [ 0, 1, 2, 3 ]
72
73  "#sound-dai-cells":
74    const: 0
75
76required:
77  - compatible
78  - reg
79  - interrupts
80  - clocks
81  - clock-names
82  - dmas
83  - dma-names
84  - "#sound-dai-cells"
85
86additionalProperties: false
87
88examples:
89  - |
90    #include <dt-bindings/clock/rk3328-cru.h>
91    #include <dt-bindings/interrupt-controller/arm-gic.h>
92    #include <dt-bindings/interrupt-controller/irq.h>
93    #include <dt-bindings/pinctrl/rockchip.h>
94
95    bus {
96        #address-cells = <2>;
97        #size-cells = <2>;
98
99        pdm@ff040000 {
100            compatible = "rockchip,pdm";
101            reg = <0x0 0xff040000 0x0 0x1000>;
102            interrupts = <GIC_SPI 82 IRQ_TYPE_LEVEL_HIGH>;
103            clocks = <&cru SCLK_PDM>, <&cru HCLK_PDM>;
104            clock-names = "pdm_clk", "pdm_hclk";
105            dmas = <&dmac 16>;
106            dma-names = "rx";
107            #sound-dai-cells = <0>;
108            pinctrl-names = "default", "sleep";
109            pinctrl-0 = <&pdmm0_clk
110                         &pdmm0_sdi0
111                         &pdmm0_sdi1
112                         &pdmm0_sdi2
113                         &pdmm0_sdi3>;
114            pinctrl-1 = <&pdmm0_clk_sleep
115                         &pdmm0_sdi0_sleep
116                         &pdmm0_sdi1_sleep
117                         &pdmm0_sdi2_sleep
118                         &pdmm0_sdi3_sleep>;
119        };
120    };
121