Add support for the Smallcat (#810)

* Add Smallcat

* Add support for led

* Do not use alt repeat

* Add another layer for led

* A bit of clean up

* Update keyboard.json

* Update keymap by making rgb non mandatory

* Clean up

* Fix inconsistencies

* Add default keymap

8 files changed, 344 insertions, 0 deletions

diff --git a/keyboards/smallcat/keyboard.json b/keyboards/smallcat/keyboard.json
new file mode 100644
index 0000000000..8fc77719e7
--- /dev/null
+++ b/keyboards/smallcat/keyboard.json
@@ -0,0 +1,88 @@
+{
+    "manufacturer": "Matt Petiteau",
+    "keyboard_name": "smallcat",
+    "url": "https://github.com/smallwat3r/smallcat",
+    "maintainer": "smallwat3r",
+    "usb": {
+        "vid": "0xFEED",
+        "pid": "0x0000",
+        "device_version": "1.0.0"
+    },
+    "board": "GENERIC_RP_RP2040",
+    "bootloader": "rp2040",
+    "processor": "RP2040",
+    "features": {
+        "extrakey": true,
+        "mousekey": true,
+        "unicode": true
+    },
+    "matrix_pins": {
+        "direct": [
+            [null, "GP26", "GP27", "GP28", null],
+            ["GP15", "GP14", "GP13", "GP12", "GP0"],
+            [null, "GP5", "GP6", "GP7", null],
+            ["GP10", "GP11", null, null, null]
+        ]
+    },
+    "split": {
+        "enabled": true,
+        "matrix_pins": {
+            "right": {
+                "direct": [
+                    [null, "GP28", "GP27", "GP26", null],
+                    ["GP0", "GP12", "GP13", "GP14", "GP15"],
+                    [null, "GP7", "GP6", "GP5", null],
+                    ["GP11", "GP10", null, null, null]
+                ]
+            }
+        },
+        "serial": {
+            "pin": "GP1",
+            "driver": "vendor"
+        }
+    },
+    "community_layouts": ["split_3x5_2"],
+    "layout_aliases": {
+        "LAYOUT": "LAYOUT_split_3x5_2"
+    },
+    "layouts": {
+        "LAYOUT_split_3x5_2": {
+            "layout":
+            [
+                {"x": 1, "y": 0.31, "matrix": [0, 1]},
+                {"x": 2, "y": 0, "matrix": [0, 2]},
+                {"x": 3, "y": 0.28, "matrix": [0, 3]},
+
+                {"x": 8, "y": 0.28, "matrix": [4, 1]},
+                {"x": 9, "y": 0, "matrix": [4, 2]},
+                {"x": 10, "y": 0.31, "matrix": [4, 3]},
+
+                {"x": 0, "y": 1.93, "matrix": [1, 0]},
+                {"x": 1, "y": 1.31, "matrix": [1, 1]},
+                {"x": 2, "y": 1, "matrix": [1, 2]},
+                {"x": 3, "y": 1.28, "matrix": [1, 3]},
+                {"x": 4, "y": 1.42, "matrix": [1, 4]},
+
+                {"x": 7, "y": 1.42, "matrix": [5, 0]},
+                {"x": 8, "y": 1.28, "matrix": [5, 1]},
+                {"x": 9, "y": 1, "matrix": [5, 2]},
+                {"x": 10, "y": 1.31, "matrix": [5, 3]},
+                {"x": 11, "y": 1.93, "matrix": [5, 4]},
+
+                {"x": 1, "y": 2.31, "matrix": [2, 1]},
+                {"x": 2, "y": 2, "matrix": [2, 2]},
+                {"x": 3, "y": 2.28, "matrix": [2, 3]},
+
+                {"x": 8, "y": 2.28, "matrix": [6, 1]},
+                {"x": 9, "y": 2, "matrix": [6, 2]},
+                {"x": 10, "y": 2.31, "matrix": [6, 3]},
+
+                {"x": 3.5, "y": 3.75, "matrix": [3, 0]},
+                {"x": 4.5, "y": 4, "matrix": [3, 1]},
+
+                {"x": 6.5, "y": 4, "matrix": [7, 0]},
+                {"x": 7.5, "y": 3.75, "matrix": [7, 1]}
+            ]
+        }
+    }
+}
diff --git a/keyboards/smallcat/keymaps/default/keymap.c b/keyboards/smallcat/keymaps/default/keymap.c
new file mode 100644
index 0000000000..2f99c07e2f
--- /dev/null
+++ b/keyboards/smallcat/keymaps/default/keymap.c
@@ -0,0 +1,27 @@
+#include QMK_KEYBOARD_H
+
+/* default generic keymap */
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT_split_3x5_2(
+              KC_W, KC_F, KC_P,                     KC_L, KC_U,    KC_Y,
+        KC_A, KC_R, KC_S, KC_T, KC_G,         KC_M, KC_N, KC_E,    KC_I, KC_O,
+              KC_Q, KC_C, KC_D,                     KC_H, KC_COMM, KC_DOT,
+                       KC_TRNS, KC_SPC,    KC_BSPC, KC_ENT
+    )
+};
+
+/* combo definitions */
+const uint16_t PROGMEM combo_x[] = {KC_W, KC_F, COMBO_END};
+const uint16_t PROGMEM combo_b[] = {KC_F, KC_P, COMBO_END};
+const uint16_t PROGMEM combo_z[] = {KC_Q, KC_C, COMBO_END};
+const uint16_t PROGMEM combo_v[] = {KC_C, KC_D, COMBO_END};
+const uint16_t PROGMEM combo_j[] = {KC_L, KC_U, COMBO_END};
+const uint16_t PROGMEM combo_k[] = {KC_H, KC_COMM, COMBO_END};
+combo_t key_combos[] = {
+    COMBO(combo_x, KC_X),
+    COMBO(combo_b, KC_B),
+    COMBO(combo_z, KC_Z),
+    COMBO(combo_v, KC_V),
+    COMBO(combo_j, KC_J),
+    COMBO(combo_k, KC_K),
+};
diff --git a/keyboards/smallcat/keymaps/default/rules.mk b/keyboards/smallcat/keymaps/default/rules.mk
new file mode 100644
index 0000000000..ab1e438182
--- /dev/null
+++ b/keyboards/smallcat/keymaps/default/rules.mk
@@ -0,0 +1 @@
+COMBO_ENABLE = yes
diff --git a/keyboards/smallcat/keymaps/vial/config.h b/keyboards/smallcat/keymaps/vial/config.h
new file mode 100644
index 0000000000..3df605a182
--- /dev/null
+++ b/keyboards/smallcat/keymaps/vial/config.h
@@ -0,0 +1,25 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#pragma once
+
+#define DYNAMIC_KEYMAP_LAYER_COUNT 8
+#define VIAL_TAP_DANCE_ENTRIES 20
+#define VIAL_COMBO_ENTRIES 40
+
+#define VIAL_KEYBOARD_UID {0xDA, 0x2A, 0xFA, 0x9D, 0x66, 0xE4, 0x31, 0x52}
+#define VIAL_UNLOCK_COMBO_ROWS { 0, 1 }
+#define VIAL_UNLOCK_COMBO_COLS { 1, 4 }
+
+#define NO_ALT_REPEAT_KEY
+
+/* make use of the mounted WS2812 led from the Waveshare RP2040-zero */
+#ifdef RGBLIGHT_ENABLE
+#    define RGBLIGHT_LED_COUNT 1
+#    define RGBLIGHT_SPLIT
+#    define RGBLIGHT_DEFAULT_HUE 110
+#    define RGBLIGHT_LIMIT_VAL 10
+#    define RGBLIGHT_SLEEP
+#    define RGBLIGHT_LAYERS
+#    define RGBLIGHT_HUE_STEP 20
+#    define WS2812_DI_PIN GP16
+#endif
diff --git a/keyboards/smallcat/keymaps/vial/keymap.c b/keyboards/smallcat/keymaps/vial/keymap.c
new file mode 100644
index 0000000000..bd3b721899
--- /dev/null
+++ b/keyboards/smallcat/keymaps/vial/keymap.c
@@ -0,0 +1,31 @@
+#include QMK_KEYBOARD_H
+
+#ifdef RGBLIGHT_ENABLE
+    const rgblight_segment_t PROGMEM capslock_layer[] = RGBLIGHT_LAYER_SEGMENTS({0, 1, HSV_RED});
+    const rgblight_segment_t PROGMEM osm_shift_layer[] = RGBLIGHT_LAYER_SEGMENTS({0, 1, HSV_YELLOW});
+
+    const rgblight_segment_t* const PROGMEM rgb_layers[] = RGBLIGHT_LAYERS_LIST(capslock_layer, osm_shift_layer);
+    void keyboard_post_init_user(void) { rgblight_layers = rgb_layers; }
+
+    /* light up led in red when caps lock in on */
+    bool led_update_user(led_t led_state) {
+        rgblight_set_layer_state(0, led_state.caps_lock);
+        return true;
+    }
+
+    /* light up led in yellow when sticky shift is activated */
+    void oneshot_mods_changed_user(uint8_t mods) {
+      if (mods & MOD_MASK_SHIFT) { rgblight_set_layer_state(1, true); }
+      if (!mods) { rgblight_set_layer_state(1, false); }
+    }
+#endif
+
+/* default empty layout */
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [0] = LAYOUT_split_3x5_2(
+                 KC_TRNS, KC_TRNS, KC_TRNS,                           KC_TRNS, KC_TRNS, KC_TRNS,
+        KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,         KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS, KC_TRNS,
+                 KC_TRNS, KC_TRNS, KC_TRNS,                           KC_TRNS, KC_TRNS, KC_TRNS,
+                                      KC_TRNS, KC_TRNS,   KC_TRNS, KC_TRNS
+    )
+};
diff --git a/keyboards/smallcat/keymaps/vial/rules.mk b/keyboards/smallcat/keymaps/vial/rules.mk
new file mode 100644
index 0000000000..b32a55da7a
--- /dev/null
+++ b/keyboards/smallcat/keymaps/vial/rules.mk
@@ -0,0 +1,15 @@
+VIA_ENABLE = yes
+VIAL_ENABLE = yes
+LTO_ENABLE = yes
+TAP_DANCE_ENABLE = yes
+MOUSEKEY_ENABLE = yes
+EXTRAKEY_ENABLE = yes
+REPEAT_KEY_ENABLE = yes
+COMBO_ENABLE = yes
+QMK_SETTINGS = yes
+
+RGBLIGHT_ENABLE = yes
+WS2812_DRIVER = vendor
+
+KEY_OVERRIDE_ENABLE = no
+VIAL_INSECURE = no
diff --git a/keyboards/smallcat/keymaps/vial/vial.json b/keyboards/smallcat/keymaps/vial/vial.json
new file mode 100644
index 0000000000..d75a3c0261
--- /dev/null
+++ b/keyboards/smallcat/keymaps/vial/vial.json
@@ -0,0 +1,144 @@
+{
+  "name": "smallcat",
+  "firmwareVersion": 0,
+  "keycodes": [
+    "via/keycodes"
+  ],
+  "menus": [
+    "via/keymap",
+    "via/layouts",
+    "via/macros",
+    "via/save_load"
+  ],
+  "matrix": {
+    "rows": 8,
+    "cols": 5
+  },
+  "layouts": {
+    "keymap": [
+      [
+        {
+          "x": 2
+        },
+        "0,2",
+        {
+          "x": 5.25
+        },
+        "4,2"
+      ],
+      [
+        {
+          "y": -0.75,
+          "x": 1
+        },
+        "0,1",
+        {
+          "x": 1
+        },
+        "0,3",
+        {
+          "x": 3.25
+        },
+        "4,1",
+        {
+          "x": 1
+        },
+        "4,3"
+      ],
+      [
+        {
+          "y": -0.25,
+          "x": 2
+        },
+        "1,2",
+        {
+          "x": 5.25
+        },
+        "5,2"
+      ],
+      [
+        {
+          "y": -0.75,
+          "x": 1
+        },
+        "1,1",
+        {
+          "x": 1
+        },
+        "1,3",
+        "1,4",
+        {
+          "x": 1.25
+        },
+        "5,0",
+        "5,1",
+        {
+          "x": 1
+        },
+        "5,3"
+      ],
+      [
+        {
+          "y": -0.5
+        },
+        "1,0",
+        {
+          "x": 9.25
+        },
+        "5,4"
+      ],
+      [
+        {
+          "y": -0.75,
+          "x": 2
+        },
+        "2,2",
+        {
+          "x": 5.25
+        },
+        "6,2"
+      ],
+      [
+        {
+          "y": -0.75,
+          "x": 1
+        },
+        "2,1",
+        {
+          "x": 1
+        },
+        "2,3",
+        {
+          "x": 3.25
+        },
+        "6,1",
+        {
+          "x": 1
+        },
+        "6,3"
+      ],
+      [
+        {
+          "y": 0.25,
+          "x": 3.5
+        },
+        "3,0",
+        {
+          "x": 2.25
+        },
+        "7,1"
+      ],
+      [
+        {
+          "y": -0.75,
+          "x": 4.5
+        },
+        "3,1",
+        {
+          "x": 0.25
+        },
+        "7,0"
+      ]
+    ]
+  }
+}
diff --git a/keyboards/smallcat/readme.md b/keyboards/smallcat/readme.md
new file mode 100644
index 0000000000..98535edaec
--- /dev/null
+++ b/keyboards/smallcat/readme.md
@@ -0,0 +1,13 @@
+# Smallcat
+
+![smallcat](https://raw.githubusercontent.com/smallwat3r/smallcat/refs/heads/main/images/smallcat.png)
+
+A 26-key split keyboard. [More info](https://github.com/smallwat3r/smallcat).
+
+* Keyboard Maintainer: [Matt Petiteau](https://github.com/smallwat3r/)
+
+Make example for this keyboard (after setting up your build environment):
+
+    make smallcat:vial
+
+See the [build environment setup](https://docs.qmk.fm/#/getting_started_build_tools) and the [make instructions](https://docs.qmk.fm/#/getting_started_make_guide) for more information. Brand new to QMK? Start with our [Complete Newbs Guide](https://docs.qmk.fm/#/newbs).