From: Menglong Wu <marlonwu@xxxxxxx>
Implements a complete ANSI keyboard solution for VNC remote input
on ARM devices by:
1. Adding a device tree include file (vnc-virtual-input.dtsi) that:
- Defines a gpio-mockup controller with 104 virtual GPIOs
(startingfrom 400)
- Maps all standard keyboard keys
(F1-F12, alphanumeric, modifiers, etc.)
- Follows Linux input event codes for key mappings
2. Updating MAINTAINERS to track the new dtsi file
The virtual GPIO approach allows embedded systems without physical
keyboards to receive full keyboard input via VNC while avoiding
conflicts with realGPIO numbering.
Signed-off-by: Menglong Wu <marlonwu@xxxxxxx>
---
MAINTAINERS | 1 +
arch/arm/boot/dts/vnc-virtual-input.dtsi | 569 +++++++++++++++++++++++
2 files changed, 570 insertions(+)
create mode 100644 arch/arm/boot/dts/vnc-virtual-input.dtsi
diff --git a/MAINTAINERS b/MAINTAINERS
index 658ef6619542..da69f516388c 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -27482,6 +27482,7 @@ L: linux-kernel@xxxxxxxxxxxxxxx
S: Maintained
F: Documentation/devicetree/bindings/input/vnc-virtual-input.txt
F: Documentation/devicetree/bindings/input/vnc-virtual-input.yaml
+F: arch/arm/boot/dts/vnc-virtual-input.da9052_tsi
THE REST
M: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
diff --git a/arch/arm/boot/dts/vnc-virtual-input.dtsi b/arch/arm/boot/dts/vnc-virtual-input.dtsi
new file mode 100644
index 000000000000..2937623d4099
--- /dev/null
+++ b/arch/arm/boot/dts/vnc-virtual-input.dtsi
@@ -0,0 +1,569 @@
+// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+/*
+ * vnc-virtual-input.dtsi - Device tree file for x11vnc
+ *
+ * KEY_xx references can be found in input-event-codes.h
+ * See vnc-virtual-input.txt Documentation file for details.
+ *
+ * Copyright (C) 2025 Menglong Wu <marlonwu@xxxxxxx>
+ *
+ */
+
+
+gpio_mockup_hw: gpio_mockup_hw {
+ compatible = "gpio-mockup";
+ gpio-controller;
+ #gpio-cells = <2>;
+ gpio-base = <400>;
+ nr-gpios = <104>;
+ status = "okay";
+};
+
+vnc_key {
+ compatible = "gpio-keys";
+
+ /* F1 - F12 */
+ vk_0 {
+ label = "vk_key_0";
+ gpios = <&gpio_mockup_hw 0 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F1>;
+ };
+ vk_1 {
+ label = "vk_key_1";
+ gpios = <&gpio_mockup_hw 1 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F2>;
+ };
+ vk_2 {
+ label = "vk_key_2";
+ gpios = <&gpio_mockup_hw 2 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F3>;
+ };
+ vk_3 {
+ label = "vk_key_3";
+ gpios = <&gpio_mockup_hw 3 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F4>;
+ };
+ vk_4 {
+ label = "vk_key_4";
+ gpios = <&gpio_mockup_hw 4 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F5>;
+ };
+ vk_5 {
+ label = "vk_key_5";
+ gpios = <&gpio_mockup_hw 5 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F6>;
+ };
+ vk_6 {
+ label = "vk_key_6";
+ gpios = <&gpio_mockup_hw 6 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F7>;
+ };
+ vk_7 {
+ label = "vk_key_7";
+ gpios = <&gpio_mockup_hw 7 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F8>;
+ };
+ vk_8 {
+ label = "vk_key_8";
+ gpios = <&gpio_mockup_hw 8 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F9>;
+ };
+ vk_9 {
+ label = "vk_key_9";
+ gpios = <&gpio_mockup_hw 9 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F10>;
+ };
+ vk_10 {
+ label = "vk_key_10";
+ gpios = <&gpio_mockup_hw 10 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F11>;
+ };
+ vk_11 {
+ label = "vk_key_11";
+ gpios = <&gpio_mockup_hw 11 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F12>;
+ };
+
+ /* Number */
+ vk_12 {
+ label = "vk_key_12";
+ gpios = <&gpio_mockup_hw 12 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_1>;
+ };
+ vk_13 {
+ label = "vk_key_13";
+ gpios = <&gpio_mockup_hw 13 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_2>;
+ };
+ vk_14 {
+ label = "vk_key_14";
+ gpios = <&gpio_mockup_hw 14 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_3>;
+ };
+ vk_15 {
+ label = "vk_key_15";
+ gpios = <&gpio_mockup_hw 15 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_4>;
+ };
+ vk_16 {
+ label = "vk_key_16";
+ gpios = <&gpio_mockup_hw 16 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_5>;
+ };
+ vk_17 {
+ label = "vk_key_17";
+ gpios = <&gpio_mockup_hw 17 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_6>;
+ };
+ vk_18 {
+ label = "vk_key_18";
+ gpios = <&gpio_mockup_hw 18 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_7>;
+ };
+ vk_19 {
+ label = "vk_key_19";
+ gpios = <&gpio_mockup_hw 19 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_8>;
+ };
+ vk_20 {
+ label = "vk_key_20";
+ gpios = <&gpio_mockup_hw 20 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_9>;
+ };
+ vk_21 {
+ label = "vk_key_21";
+ gpios = <&gpio_mockup_hw 21 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_0>;
+ };
+
+
+ /* a - z */
+ vk_22 {
+ label = "vk_key_22";
+ gpios = <&gpio_mockup_hw 22 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_A>;
+ };
+ vk_23 {
+ label = "vk_key_23";
+ gpios = <&gpio_mockup_hw 23 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_B>;
+ };
+ vk_24 {
+ label = "vk_key_24";
+ gpios = <&gpio_mockup_hw 24 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_C>;
+ };
+ vk_25 {
+ label = "vk_key_25";
+ gpios = <&gpio_mockup_hw 25 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_D>;
+ };
+ vk_26 {
+ label = "vk_key_26";
+ gpios = <&gpio_mockup_hw 26 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_E>;
+ };
+ vk_27 {
+ label = "vk_key_27";
+ gpios = <&gpio_mockup_hw 27 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_F>;
+ };
+ vk_28 {
+ label = "vk_key_28";
+ gpios = <&gpio_mockup_hw 28 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_G>;
+ };
+ vk_29 {
+ label = "vk_key_29";
+ gpios = <&gpio_mockup_hw 29 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_H>;
+ };
+ vk_30 {
+ label = "vk_key_30";
+ gpios = <&gpio_mockup_hw 30 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_I>;
+ };
+ vk_31 {
+ label = "vk_key_31";
+ gpios = <&gpio_mockup_hw 31 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_J>;
+ };
+ vk_32 {
+ label = "vk_key_32";
+ gpios = <&gpio_mockup_hw 32 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_K>;
+ };
+ vk_33 {
+ label = "vk_key_33";
+ gpios = <&gpio_mockup_hw 33 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_L>;
+ };
+ vk_34 {
+ label = "vk_key_34";
+ gpios = <&gpio_mockup_hw 34 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_M>;
+ };
+ vk_35 {
+ label = "vk_key_35";
+ gpios = <&gpio_mockup_hw 35 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_N>;
+ };
+ vk_36 {
+ label = "vk_key_36";
+ gpios = <&gpio_mockup_hw 36 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_O>;
+ };
+ vk_37 {
+ label = "vk_key_37";
+ gpios = <&gpio_mockup_hw 37 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_P>;
+ };
+ vk_38 {
+ label = "vk_key_38";
+ gpios = <&gpio_mockup_hw 38 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_Q>;
+ };
+ vk_39 {
+ label = "vk_key_39";
+ gpios = <&gpio_mockup_hw 39 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_R>;
+ };
+ vk_40 {
+ label = "vk_key_40";
+ gpios = <&gpio_mockup_hw 40 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_S>;
+ };
+ vk_41 {
+ label = "vk_key_41";
+ gpios = <&gpio_mockup_hw 41 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_T>;
+ };
+ vk_42 {
+ label = "vk_key_42";
+ gpios = <&gpio_mockup_hw 42 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_U>;
+ };
+ vk_43 {
+ label = "vk_key_43";
+ gpios = <&gpio_mockup_hw 43 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_V>;
+ };
+ vk_44 {
+ label = "vk_key_44";
+ gpios = <&gpio_mockup_hw 44 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_W>;
+ };
+ vk_45 {
+ label = "vk_key_45";
+ gpios = <&gpio_mockup_hw 45 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_X>;
+ };
+ vk_46 {
+ label = "vk_key_46";
+ gpios = <&gpio_mockup_hw 46 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_Y>;
+ };
+ vk_47 {
+ label = "vk_key_47";
+ gpios = <&gpio_mockup_hw 47 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_Z>;
+ };
+
+
+ /* Misc */
+ vk_48 {
+ label = "vk_key_48";
+ gpios = <&gpio_mockup_hw 48 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_SYSRQ>;
+ };
+ vk_49 {
+ label = "vk_key_49";
+ gpios = <&gpio_mockup_hw 49 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_SCROLLLOCK>;
+ };
+ vk_50 {
+ label = "vk_key_50";
+ gpios = <&gpio_mockup_hw 50 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_PAUSE>;
+ };
+
+ /* Cursor Position */
+ vk_51 {
+ label = "vk_key_51";
+ gpios = <&gpio_mockup_hw 51 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_INSERT>;
+ };
+ vk_52 {
+ label = "vk_key_52";
+ gpios = <&gpio_mockup_hw 52 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_HOME>;
+ };
+ vk_53 {
+ label = "vk_key_53";
+ gpios = <&gpio_mockup_hw 53 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_PAGEUP>;
+ };
+
+ vk_54 {
+ label = "vk_key_54";
+ gpios = <&gpio_mockup_hw 54 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_DELETE>;
+ };
+ vk_55 {
+ label = "vk_key_55";
+ gpios = <&gpio_mockup_hw 55 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_END>;
+ };
+ vk_56 {
+ label = "vk_key_56";
+ gpios = <&gpio_mockup_hw 56 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_PAGEDOWN>;
+ };
+
+ vk_57 {
+ label = "vk_key_57";
+ gpios = <&gpio_mockup_hw 57 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_UP>;
+ };
+ vk_58 {
+ label = "vk_key_58";
+ gpios = <&gpio_mockup_hw 58 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_LEFT>;
+ };
+ vk_59 {
+ label = "vk_key_59";
+ gpios = <&gpio_mockup_hw 59 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_DOWN>;
+ };
+ vk_60 {
+ label = "vk_key_60";
+ gpios = <&gpio_mockup_hw 60 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_RIGHT>;
+ };
+
+
+ /* Numpad */
+ vk_61 {
+ label = "vk_key_61";
+ gpios = <&gpio_mockup_hw 61 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_NUMLOCK>;
+ };
+ vk_62 {
+ label = "vk_key_62";
+ gpios = <&gpio_mockup_hw 62 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KPSLASH>;
+ };
+ vk_63 {
+ label = "vk_key_63";
+ gpios = <&gpio_mockup_hw 63 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KPASTERISK>;
+ };
+ vk_64 {
+ label = "vk_key_64";
+ gpios = <&gpio_mockup_hw 64 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_MINUS>;
+ };
+ vk_65 {
+ label = "vk_key_65";
+ gpios = <&gpio_mockup_hw 65 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KPPLUS>;
+ };
+ vk_66 {
+ label = "vk_key_66";
+ gpios = <&gpio_mockup_hw 66 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KPENTER>;
+ };
+ vk_67 {
+ label = "vk_key_67";
+ gpios = <&gpio_mockup_hw 67 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KPDOT>;
+ };
+
+ vk_68 {
+ label = "vk_key_68";
+ gpios = <&gpio_mockup_hw 68 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP0>;
+ };
+ vk_69 {
+ label = "vk_key_69";
+ gpios = <&gpio_mockup_hw 69 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP1>;
+ };
+ vk_70 {
+ label = "vk_key_70";
+ gpios = <&gpio_mockup_hw 70 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP2>;
+ };
+ vk_71 {
+ label = "vk_key_71";
+ gpios = <&gpio_mockup_hw 71 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP3>;
+ };
+ vk_72 {
+ label = "vk_key_72";
+ gpios = <&gpio_mockup_hw 72 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP4>;
+ };
+ vk_73 {
+ label = "vk_key_73";
+ gpios = <&gpio_mockup_hw 73 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP5>;
+ };
+ vk_74 {
+ label = "vk_key_74";
+ gpios = <&gpio_mockup_hw 74 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP6>;
+ };
+ vk_75 {
+ label = "vk_key_75";
+ gpios = <&gpio_mockup_hw 75 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP7>;
+ };
+ vk_76 {
+ label = "vk_key_76";
+ gpios = <&gpio_mockup_hw 76 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP8>;
+ };
+ vk_77 {
+ label = "vk_key_77";
+ gpios = <&gpio_mockup_hw 77 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_KP9>;
+ };
+
+ /* Left of a - z */
+ vk_78 {
+ label = "vk_key_78";
+ gpios = <&gpio_mockup_hw 78 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_ESC>;
+ };
+ vk_79 {
+ label = "vk_key_79";
+ gpios = <&gpio_mockup_hw 79 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_GRAVE>;
+ };
+ vk_80 {
+ label = "vk_key_80";
+ gpios = <&gpio_mockup_hw 80 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_TAB>;
+ };
+ vk_81 {
+ label = "vk_key_81";
+ gpios = <&gpio_mockup_hw 81 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_CAPSLOCK>;
+ };
+ vk_82 {
+ label = "vk_key_82";
+ gpios = <&gpio_mockup_hw 82 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_LEFTSHIFT>;
+ };
+ vk_83 {
+ label = "vk_key_83";
+ gpios = <&gpio_mockup_hw 83 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_LEFTCTRL>;
+ };
+ vk_84 {
+ label = "vk_key_84";
+ gpios = <&gpio_mockup_hw 84 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_LEFTMETA>;
+ };
+ vk_85 {
+ label = "vk_key_85";
+ gpios = <&gpio_mockup_hw 85 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_LEFTALT>;
+ };
+ vk_86 {
+ label = "vk_key_86";
+ gpios = <&gpio_mockup_hw 86 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_SPACE>;
+ };
+
+ /* Right of a - z */
+ vk_87 {
+ label = "vk_key_87";
+ gpios = <&gpio_mockup_hw 87 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_MINUS>;
+ };
+ vk_88 {
+ label = "vk_key_88";
+ gpios = <&gpio_mockup_hw 88 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_EQUAL>;
+ };
+ vk_89 {
+ label = "vk_key_89";
+ gpios = <&gpio_mockup_hw 89 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_BACKSPACE>;
+ };
+ vk_90 {
+ label = "vk_key_90";
+ gpios = <&gpio_mockup_hw 90 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_LEFTBRACE>;
+ };
+ vk_91 {
+ label = "vk_key_91";
+ gpios = <&gpio_mockup_hw 91 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_RIGHTBRACE>;
+ };
+ vk_92 {
+ label = "vk_key_92";
+ gpios = <&gpio_mockup_hw 92 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_BACKSLASH>;
+ };
+
+ vk_93 {
+ label = "vk_key_93";
+ gpios = <&gpio_mockup_hw 93 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_SEMICOLON>;
+ };
+ vk_94 {
+ label = "vk_key_94";
+ gpios = <&gpio_mockup_hw 94 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_APOSTROPHE>;
+ };
+ vk_95 {
+ label = "vk_key_95";
+ gpios = <&gpio_mockup_hw 95 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_ENTER>;
+ };
+
+ vk_96 {
+ label = "vk_key_96";
+ gpios = <&gpio_mockup_hw 96 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_COMMA>;
+ };
+ vk_97 {
+ label = "vk_key_97";
+ gpios = <&gpio_mockup_hw 97 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_DOT>;
+ };
+ vk_98 {
+ label = "vk_key_98";
+ gpios = <&gpio_mockup_hw 98 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_SLASH>;
+ };
+ vk_99 {
+ label = "vk_key_99";
+ gpios = <&gpio_mockup_hw 99 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_RIGHTSHIFT>;
+ };
+
+ vk_100 {
+ label = "vk_key_100";
+ gpios = <&gpio_mockup_hw 100 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_RIGHTALT>;
+ };
+ vk_101 {
+ label = "vk_key_101";
+ gpios = <&gpio_mockup_hw 101 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_RIGHTMETA>;
+ };
+ vk_102 {
+ label = "vk_key_102";
+ gpios = <&gpio_mockup_hw 102 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_COMPOSE>;
+ };
+ vk_103 {
+ label = "vk_key_103";
+ gpios = <&gpio_mockup_hw 103 GPIO_ACTIVE_HIGH>;
+ linux,code = <KEY_RIGHTCTRL>;
+ };
+};
--
2.39.5
