xref: /linux/Documentation/devicetree/bindings/media/allwinner,sun4i-a10-csi.yaml (revision 74c12ee02af109adcde36ec184fa59c0afb0edaa) 
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    minItems: 2
37    maxItems: 3
38    items:
39      - description: The CSI interface clock
40      - description: The CSI ISP clock
41      - description: The CSI DRAM clock
42
43  clock-names:
44    minItems: 2
45    maxItems: 3
46    items:
47      - const: bus
48      - const: isp
49      - const: ram
50
51  resets:
52    maxItems: 1
53
54  # See ./video-interfaces.txt for details
55  port:
56    type: object
57    additionalProperties: false
58
59    properties:
60      endpoint:
61        type: object
62
63        properties:
64          bus-width:
65            enum: [8, 16]
66
67          data-active: true
68          hsync-active: true
69          pclk-sample: true
70          remote-endpoint: true
71          vsync-active: true
72
73        required:
74          - bus-width
75          - data-active
76          - hsync-active
77          - pclk-sample
78          - remote-endpoint
79          - vsync-active
80
81    required:
82      - endpoint
83
84required:
85  - compatible
86  - reg
87  - interrupts
88  - clocks
89
90additionalProperties: false
91
92examples:
93  - |
94    #include <dt-bindings/interrupt-controller/arm-gic.h>
95    #include <dt-bindings/clock/sun7i-a20-ccu.h>
96    #include <dt-bindings/reset/sun4i-a10-ccu.h>
97
98    csi0: csi@1c09000 {
99        compatible = "allwinner,sun7i-a20-csi0";
100        reg = <0x01c09000 0x1000>;
101        interrupts = <GIC_SPI 42 IRQ_TYPE_LEVEL_HIGH>;
102        clocks = <&ccu CLK_AHB_CSI0>, <&ccu CLK_CSI_SCLK>, <&ccu CLK_DRAM_CSI0>;
103        clock-names = "bus", "isp", "ram";
104        resets = <&ccu RST_CSI0>;
105
106        port {
107            csi_from_ov5640: endpoint {
108                remote-endpoint = <&ov5640_to_csi>;
109                bus-width = <8>;
110                hsync-active = <1>; /* Active high */
111                vsync-active = <0>; /* Active low */
112                data-active = <1>;  /* Active high */
113                pclk-sample = <1>;  /* Rising */
114            };
115        };
116    };
117
118...
119