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1# SPDX-License-Identifier: GPL-2.02%YAML 1.23---4$id: http://devicetree.org/schemas/display/panel/tpo,tpg110.yaml#5$schema: http://devicetree.org/meta-schemas/core.yaml#6 7title: TPO TPG110 Panel8 9maintainers:10 - Linus Walleij <linus.walleij@linaro.org>11 - Thierry Reding <thierry.reding@gmail.com>12 13description: |+14 This panel driver is a component that acts as an intermediary15 between an RGB output and a variety of panels. The panel16 driver is strapped up in electronics to the desired resolution17 and other properties, and has a control interface over 3WIRE18 SPI. By talking to the TPG110 over SPI, the strapped properties19 can be discovered and the hardware is therefore mostly20 self-describing.21 22 +--------+23 SPI -> | TPO | -> physical display24 RGB -> | TPG110 |25 +--------+26 27 If some electrical strap or alternate resolution is desired,28 this can be set up by taking software control of the display29 over the SPI interface. The interface can also adjust30 for properties of the display such as gamma correction and31 certain electrical driving levels.32 33 The TPG110 does not know the physical dimensions of the panel34 connected, so this needs to be specified in the device tree.35 36 It requires a GPIO line for control of its reset line.37 38 The serial protocol has line names that resemble I2C but the39 protocol is not I2C but 3WIRE SPI.40 41 42allOf:43 - $ref: panel-common.yaml#44 - $ref: /schemas/spi/spi-peripheral-props.yaml#45 46properties:47 compatible:48 oneOf:49 - items:50 - enum:51 - ste,nomadik-nhk15-display52 - const: tpo,tpg11053 - const: tpo,tpg11054 55 reg:56 maxItems: 157 58 grestb-gpios:59 maxItems: 160 description: panel reset GPIO61 62 spi-3wire: true63 64 spi-max-frequency:65 const: 300000066 67required:68 - compatible69 - reg70 - grestb-gpios71 - width-mm72 - height-mm73 - spi-3wire74 - spi-max-frequency75 - port76 77unevaluatedProperties: false78 79examples:80 - |+81 spi {82 #address-cells = <1>;83 #size-cells = <0>;84 85 panel: display@0 {86 compatible = "tpo,tpg110";87 reg = <0>;88 spi-3wire;89 /* 320 ns min period ~= 3 MHz */90 spi-max-frequency = <3000000>;91 /* Width and height from data sheet */92 width-mm = <116>;93 height-mm = <87>;94 grestb-gpios = <&foo_gpio 5 1>;95 backlight = <&bl>;96 97 port {98 nomadik_clcd_panel: endpoint {99 remote-endpoint = <&foo>;100 };101 };102 };103 };104 105...106