1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/display/panel/sitronix,st7701.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Sitronix ST7701 based LCD panels
8
9 maintainers:
10 - Jagan Teki <jagan@amarulasolutions.com>
11
12 description: |
13 ST7701 designed for small and medium sizes of TFT LCD display, is
14 capable of supporting up to 480RGBX864 in resolution. It provides
15 several system interfaces like MIPI/RGB/SPI.
16
17 Techstar TS8550B is 480x854, 2-lane MIPI DSI LCD panel which has
18 inbuilt ST7701 chip.
19
20 Densitron DMT028VGHMCMI-1A is 480x640, 2-lane MIPI DSI LCD panel
21 which has built-in ST7701 chip.
22
23 properties:
24 compatible:
25 items:
26 - enum:
27 - anbernic,rg-arc-panel
28 - anbernic,rg28xx-panel
29 - densitron,dmt028vghmcmi-1a
30 - elida,kd50t048a
31 - techstar,ts8550b
32 - const: sitronix,st7701
33
34 reg:
35 description: DSI / SPI channel used by that screen
36 maxItems: 1
37
38 VCC-supply:
39 description: analog regulator for MIPI circuit
40
41 IOVCC-supply:
42 description: I/O system regulator
43
44 dc-gpios:
45 maxItems: 1
46 description:
47 Controller data/command selection (D/CX) in 4-line SPI mode.
48 If not set, the controller is in 3-line SPI mode.
49 Disallowed for DSI.
50
51 port: true
52 reset-gpios: true
53 rotation: true
54
55 backlight: true
56
57 required:
58 - compatible
59 - reg
60 - VCC-supply
61 - IOVCC-supply
62 - port
63 - reset-gpios
64
65 allOf:
66 - $ref: panel-common.yaml#
67 - if:
68 properties:
69 compatible:
70 contains:
71 # SPI connected panels
72 enum:
73 - anbernic,rg28xx-panel
74 then:
75 $ref: /schemas/spi/spi-peripheral-props.yaml#
76
77 - if:
78 properties:
79 compatible:
80 not:
81 contains:
82 # DSI or SPI without D/CX pin
83 enum:
84 - anbernic,rg-arc-panel
85 - anbernic,rg28xx-panel
86 - densitron,dmt028vghmcmi-1a
87 - elida,kd50t048a
88 - techstar,ts8550b
89 then:
90 required:
91 - dc-gpios
92 else:
93 properties:
94 dc-gpios: false
95
96 unevaluatedProperties: false
97
98 examples:
99 - |
100 #include <dt-bindings/gpio/gpio.h>
101
102 dsi {
103 #address-cells = <1>;
104 #size-cells = <0>;
105
106 panel@0 {
107 compatible = "techstar,ts8550b", "sitronix,st7701";
108 reg = <0>;
109 VCC-supply = <®_dldo2>;
110 IOVCC-supply = <®_dldo2>;
111 reset-gpios = <&pio 3 24 GPIO_ACTIVE_HIGH>; /* LCD-RST: PD24 */
112 backlight = <&backlight>;
113
114 port {
115 mipi_in_panel: endpoint {
116 remote-endpoint = <&mipi_out_panel>;
117 };
118 };
119 };
120 };
121 - |
122 #include <dt-bindings/gpio/gpio.h>
123
124 spi {
125 #address-cells = <1>;
126 #size-cells = <0>;
127
128 panel@0 {
129 compatible = "anbernic,rg28xx-panel", "sitronix,st7701";
130 reg = <0>;
131 spi-max-frequency = <3125000>;
132 VCC-supply = <®_lcd>;
133 IOVCC-supply = <®_lcd>;
134 reset-gpios = <&pio 8 14 GPIO_ACTIVE_HIGH>; /* LCD-RST: PI14 */
135 backlight = <&backlight>;
136
137 port {
138 panel_in_rgb: endpoint {
139 remote-endpoint = <&tcon_lcd0_out_lcd>;
140 };
141 };
142 };
143 };
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