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