1 # SPDX-License-Identifier: GPL-2.0
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/display/allwinner,sun6i-a31-drc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Allwinner A31 Dynamic Range Controller
8
9 maintainers:
10 - Chen-Yu Tsai <wens@csie.org>
11 - Maxime Ripard <mripard@kernel.org>
12
13 description: |
14 The DRC (Dynamic Range Controller) allows to dynamically adjust
15 pixel brightness/contrast based on histogram measurements for LCD
16 content adaptive backlight control.
17
18 properties:
19 compatible:
20 enum:
21 - allwinner,sun6i-a31-drc
22 - allwinner,sun6i-a31s-drc
23 - allwinner,sun8i-a23-drc
24 - allwinner,sun8i-a33-drc
25 - allwinner,sun9i-a80-drc
26
27 reg:
28 maxItems: 1
29
30 interrupts:
31 maxItems: 1
32
33 clocks:
34 items:
35 - description: The DRC interface clock
36 - description: The DRC module clock
37 - description: The DRC DRAM clock
38
39 clock-names:
40 items:
41 - const: ahb
42 - const: mod
43 - const: ram
44
45 resets:
46 maxItems: 1
47
48 ports:
49 $ref: /schemas/graph.yaml#/properties/ports
50
51 properties:
52 port@0:
53 $ref: /schemas/graph.yaml#/properties/port
54 description: |
55 Input endpoints of the controller.
56
57 port@1:
58 $ref: /schemas/graph.yaml#/properties/port
59 description: |
60 Output endpoints of the controller.
61
62 required:
63 - port@0
64 - port@1
65
66 required:
67 - compatible
68 - reg
69 - interrupts
70 - clocks
71 - clock-names
72 - resets
73 - ports
74
75 additionalProperties: false
76
77 examples:
78 - |
79 #include <dt-bindings/interrupt-controller/arm-gic.h>
80
81 #include <dt-bindings/clock/sun6i-a31-ccu.h>
82 #include <dt-bindings/reset/sun6i-a31-ccu.h>
83
84 drc0: drc@1e70000 {
85 compatible = "allwinner,sun6i-a31-drc";
86 reg = <0x01e70000 0x10000>;
87 interrupts = <GIC_SPI 91 IRQ_TYPE_LEVEL_HIGH>;
88 clocks = <&ccu CLK_AHB1_DRC0>, <&ccu CLK_IEP_DRC0>,
89 <&ccu CLK_DRAM_DRC0>;
90 clock-names = "ahb", "mod",
91 "ram";
92 resets = <&ccu RST_AHB1_DRC0>;
93
94 ports {
95 #address-cells = <1>;
96 #size-cells = <0>;
97
98 drc0_in: port@0 {
99 reg = <0>;
100
101 drc0_in_be0: endpoint {
102 remote-endpoint = <&be0_out_drc0>;
103 };
104 };
105
106 drc0_out: port@1 {
107 #address-cells = <1>;
108 #size-cells = <0>;
109 reg = <1>;
110
111 drc0_out_tcon0: endpoint@0 {
112 reg = <0>;
113 remote-endpoint = <&tcon0_in_drc0>;
114 };
115
116 drc0_out_tcon1: endpoint@1 {
117 reg = <1>;
118 remote-endpoint = <&tcon1_in_drc0>;
119 };
120 };
121 };
122 };
123
124
125 ...
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.