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/samsung,lms397kf04.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: Samsung LMS397KF04 display panel
8
9 description: The datasheet claims this is based around a display controller
10 named DB7430 with a separate backlight controller.
11
12 maintainers:
13 - Linus Walleij <linus.walleij@linaro.org>
14
15 allOf:
16 - $ref: panel-common.yaml#
17 - $ref: /schemas/spi/spi-peripheral-props.yaml#
18
19 properties:
20 compatible:
21 const: samsung,lms397kf04
22
23 reg:
24 maxItems: 1
25
26 reset-gpios: true
27
28 vci-supply:
29 description: regulator that supplies the VCI analog voltage
30 usually around 3.0 V
31
32 vccio-supply:
33 description: regulator that supplies the VCCIO voltage usually
34 around 1.8 V
35
36 backlight: true
37
38 spi-cpha: true
39
40 spi-cpol: true
41
42 spi-max-frequency:
43 description: inherited as a SPI client node, the datasheet specifies
44 maximum 300 ns minimum cycle which gives around 3 MHz max frequency
45 maximum: 3000000
46
47 port: true
48
49 required:
50 - compatible
51 - reg
52 - spi-cpha
53 - spi-cpol
54 - port
55
56 unevaluatedProperties: false
57
58 examples:
59 - |
60 #include <dt-bindings/gpio/gpio.h>
61
62 spi {
63 compatible = "spi-gpio";
64 sck-gpios = <&gpio 0 GPIO_ACTIVE_HIGH>;
65 miso-gpios = <&gpio 1 GPIO_ACTIVE_HIGH>;
66 mosi-gpios = <&gpio 2 GPIO_ACTIVE_HIGH>;
67 cs-gpios = <&gpio 3 GPIO_ACTIVE_HIGH>;
68 num-chipselects = <1>;
69 #address-cells = <1>;
70 #size-cells = <0>;
71 panel@0 {
72 compatible = "samsung,lms397kf04";
73 spi-max-frequency = <3000000>;
74 spi-cpha;
75 spi-cpol;
76 reg = <0>;
77 vci-supply = <&lcd_3v0_reg>;
78 vccio-supply = <&lcd_1v8_reg>;
79 reset-gpios = <&gpio 4 GPIO_ACTIVE_LOW>;
80 backlight = <&ktd259>;
81
82 port {
83 panel_in: endpoint {
84 remote-endpoint = <&display_out>;
85 };
86 };
87 };
88 };
89
90 ...
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