[Keyboard] add via support for boardsource/4x12 (#10220)

Co-authored-by: Adam Gwilliam <agwilliam@yaharasoftware.com>

keyboards/boardsource/4x12/keymaps/via/keymap.c

@@ -0,0 +1,36 @@
+#include QMK_KEYBOARD_H
+
+enum layers {
+    _MAIN,
+    _RAISE,
+    _LOWER,
+};
+
+// Readability keycodes
+#define LOWER   MO(_LOWER)
+#define RAISE   MO(_RAISE)
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+
+  [_MAIN] = LAYOUT_ortho_4x12(
+    KC_TAB,  KC_Q,    KC_W,    KC_E,    KC_R,    KC_T,    KC_Y,    KC_U,    KC_I,    KC_O,    KC_P,    KC_BSPC,
+    KC_ESC,  KC_A,    KC_S,    KC_D,    KC_F,    KC_G,    KC_H,    KC_J,    KC_K,    KC_L,    KC_SCLN, KC_QUOT,
+    KC_LSFT, KC_Z,    KC_X,    KC_C,    KC_V,    KC_B,    KC_N,    KC_M,    KC_COMM, KC_DOT,  KC_SLSH, KC_ENT ,
+    KC_PIPE, KC_LCTL, KC_LALT, KC_LGUI, LOWER,   KC_SPC,  KC_SPC,  RAISE,   KC_LEFT, KC_DOWN, KC_UP,   KC_RGHT
+  ),
+
+  [_RAISE] = LAYOUT_ortho_4x12(
+  KC_TILD, KC_EXLM, KC_AT,   KC_HASH, KC_DLR,  KC_PERC, KC_CIRC, KC_AMPR,    KC_ASTR,    KC_LPRN, KC_RPRN, KC_BSPC,
+  KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_UNDS,    KC_PLUS,    KC_LCBR, KC_RCBR, KC_PIPE,
+  _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  S(KC_NUHS), S(KC_NUBS), KC_HOME, KC_END,  _______,
+  RESET,   _______, _______, _______, _______, _______, _______, _______,    KC_MNXT,    KC_VOLD, KC_VOLU, KC_MPLY
+  ),
+
+  [_LOWER] = LAYOUT_ortho_4x12(
+ KC_GRV,  KC_1,    KC_2,    KC_3,    KC_4,    KC_5,    KC_6,    KC_7,    KC_8,    KC_9,    KC_0,    KC_BSPC,
+ KC_DEL,  KC_F1,   KC_F2,   KC_F3,   KC_F4,   KC_F5,   KC_F6,   KC_MINS, KC_EQL,  KC_LBRC, KC_RBRC, KC_BSLS,
+ _______, KC_F7,   KC_F8,   KC_F9,   KC_F10,  KC_F11,  KC_F12,  KC_NUHS, KC_NUBS, KC_PGUP, KC_PGDN, _______,
+ _______, _______, _______, _______, _______, _______, _______, _______, KC_MNXT, KC_VOLD, KC_VOLU, KC_MPLY
+  )
+
+};

keyboards/boardsource/4x12/keymaps/via/readme.md

@@ -0,0 +1,5 @@
+# The via keymap for boardsource 4x12 ortholinear keybaoard
+
+This folder contains the [VIA](https://caniusevia.com/) configuration for the boardsource 4x12 ortholinear keybaoard
+
+Maintained by: [gwillad](https://github.com/gwillad)

keyboards/boardsource/4x12/keymaps/via/rules.mk

@@ -0,0 +1 @@
+VIA_ENABLE = yes