From 2c3c1048746a4622d8c89a29670120dc8fab93c4 Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Sun, 7 Apr 2024 20:49:45 +0200
Subject: Adding upstream version 6.1.76.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../bindings/display/panel/tpo,tpg110.yaml         | 103 +++++++++++++++++++++
 1 file changed, 103 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/panel/tpo,tpg110.yaml

(limited to 'Documentation/devicetree/bindings/display/panel/tpo,tpg110.yaml')

diff --git a/Documentation/devicetree/bindings/display/panel/tpo,tpg110.yaml b/Documentation/devicetree/bindings/display/panel/tpo,tpg110.yaml
new file mode 100644
index 000000000..6f1f02044
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/panel/tpo,tpg110.yaml
@@ -0,0 +1,103 @@
+# SPDX-License-Identifier: GPL-2.0
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/tpo,tpg110.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TPO TPG110 Panel
+
+maintainers:
+  - Linus Walleij <linus.walleij@linaro.org>
+  - Thierry Reding <thierry.reding@gmail.com>
+
+description: |+
+  This panel driver is a component that acts as an intermediary
+  between an RGB output and a variety of panels. The panel
+  driver is strapped up in electronics to the desired resolution
+  and other properties, and has a control interface over 3WIRE
+  SPI. By talking to the TPG110 over SPI, the strapped properties
+  can be discovered and the hardware is therefore mostly
+  self-describing.
+
+         +--------+
+  SPI -> |  TPO   | -> physical display
+  RGB -> | TPG110 |
+         +--------+
+
+  If some electrical strap or alternate resolution is desired,
+  this can be set up by taking software control of the display
+  over the SPI interface. The interface can also adjust
+  for properties of the display such as gamma correction and
+  certain electrical driving levels.
+
+  The TPG110 does not know the physical dimensions of the panel
+  connected, so this needs to be specified in the device tree.
+
+  It requires a GPIO line for control of its reset line.
+
+  The serial protocol has line names that resemble I2C but the
+  protocol is not I2C but 3WIRE SPI.
+
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - ste,nomadik-nhk15-display
+          - const: tpo,tpg110
+      - const: tpo,tpg110
+
+  reg: true
+
+  grestb-gpios:
+    maxItems: 1
+    description: panel reset GPIO
+
+  spi-3wire: true
+
+  spi-max-frequency:
+    const: 3000000
+
+required:
+  - compatible
+  - reg
+  - grestb-gpios
+  - width-mm
+  - height-mm
+  - spi-3wire
+  - spi-max-frequency
+  - port
+
+unevaluatedProperties: false
+
+examples:
+  - |+
+    spi {
+      #address-cells = <1>;
+      #size-cells = <0>;
+
+      panel: display@0 {
+        compatible = "tpo,tpg110";
+        reg = <0>;
+        spi-3wire;
+        /* 320 ns min period ~= 3 MHz */
+        spi-max-frequency = <3000000>;
+        /* Width and height from data sheet */
+        width-mm = <116>;
+        height-mm = <87>;
+        grestb-gpios = <&foo_gpio 5 1>;
+        backlight = <&bl>;
+
+        port {
+          nomadik_clcd_panel: endpoint {
+            remote-endpoint = <&foo>;
+          };
+        };
+      };
+    };
+
+...
-- 
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