xref: /linux/Documentation/devicetree/bindings/media/allwinner,sun4i-a10-csi.yaml (revision 60e9eabf41fa916d2ef68c5bf929197975917578) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/media/allwinner,sun4i-a10-csi.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Allwinner A10 CMOS Sensor Interface (CSI) Device Tree Bindings
8
9maintainers:
10  - Chen-Yu Tsai <wens@csie.org>
11  - Maxime Ripard <mripard@kernel.org>
12
13description: |-
14  The Allwinner A10 and later has a CMOS Sensor Interface to retrieve
15  frames from a parallel or BT656 sensor.
16
17properties:
18  compatible:
19    oneOf:
20      - const: allwinner,sun4i-a10-csi1
21      - const: allwinner,sun7i-a20-csi0
22      - items:
23          - const: allwinner,sun7i-a20-csi1
24          - const: allwinner,sun4i-a10-csi1
25      - items:
26          - const: allwinner,sun8i-r40-csi0
27          - const: allwinner,sun7i-a20-csi0
28
29  reg:
30    maxItems: 1
31
32  interrupts:
33    maxItems: 1
34
35  clocks:
36    oneOf:
37      - items:
38          - description: The CSI interface clock
39          - description: The CSI DRAM clock
40
41      - items:
42          - description: The CSI interface clock
43          - description: The CSI ISP clock
44          - description: The CSI DRAM clock
45
46  clock-names:
47    oneOf:
48      - items:
49          - const: bus
50          - const: ram
51
52      - items:
53          - const: bus
54          - const: isp
55          - const: ram
56
57  resets:
58    maxItems: 1
59
60  # FIXME: This should be made required eventually once every SoC will
61  # have the MBUS declared.
62  interconnects:
63    maxItems: 1
64
65  # FIXME: This should be made required eventually once every SoC will
66  # have the MBUS declared.
67  interconnect-names:
68    const: dma-mem
69
70  # See ./video-interfaces.txt for details
71  port:
72    type: object
73    additionalProperties: false
74
75    properties:
76      endpoint:
77        type: object
78
79        properties:
80          bus-width:
81            enum: [8, 16]
82
83          data-active: true
84          hsync-active: true
85          pclk-sample: true
86          remote-endpoint: true
87          vsync-active: true
88
89        required:
90          - bus-width
91          - data-active
92          - hsync-active
93          - pclk-sample
94          - remote-endpoint
95          - vsync-active
96
97    required:
98      - endpoint
99
100required:
101  - compatible
102  - reg
103  - interrupts
104  - clocks
105
106additionalProperties: false
107
108examples:
109  - |
110    #include <dt-bindings/interrupt-controller/arm-gic.h>
111    #include <dt-bindings/clock/sun7i-a20-ccu.h>
112    #include <dt-bindings/reset/sun4i-a10-ccu.h>
113
114    csi0: csi@1c09000 {
115        compatible = "allwinner,sun7i-a20-csi0";
116        reg = <0x01c09000 0x1000>;
117        interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
118        clocks = <&ccu CLK_AHB_CSI0>, <&ccu CLK_CSI_SCLK>, <&ccu CLK_DRAM_CSI0>;
119        clock-names = "bus", "isp", "ram";
120        resets = <&ccu RST_CSI0>;
121
122        port {
123            csi_from_ov5640: endpoint {
124                remote-endpoint = <&ov5640_to_csi>;
125                bus-width = <8>;
126                hsync-active = <1>; /* Active high */
127                vsync-active = <0>; /* Active low */
128                data-active = <1>;  /* Active high */
129                pclk-sample = <1>;  /* Rising */
130            };
131        };
132    };
133
134...
135