Initial work on keymap transforms for non-standard matrixes.

* Allows "gaps" for keyboards like Kyra.
* Allows keyboards with matrixes that don't map the logical key
  locations to have normal looking keymaps when defined.

12 files changed, 1028 insertions, 0 deletions

diff --git a/app/boards/shields/kyria/Kconfig.defconfig b/app/boards/shields/kyria/Kconfig.defconfig
new file mode 100644
index 0000000..0bd3562
--- /dev/null
+++ b/app/boards/shields/kyria/Kconfig.defconfig
@@ -0,0 +1,7 @@
+
+if SHIELD_KYRIA
+
+config ZMK_KEYBOARD_NAME
+	default "Kyria"
+
+endif
diff --git a/app/boards/shields/kyria/Kconfig.shield b/app/boards/shields/kyria/Kconfig.shield
new file mode 100644
index 0000000..598fc81
--- /dev/null
+++ b/app/boards/shields/kyria/Kconfig.shield
@@ -0,0 +1,5 @@
+# Copyright (c) 2020 Pete Johanson
+# SPDX-License-Identifier: MIT
+
+config SHIELD_KYRIA
+	def_bool $(shields_list_contains,kyria)
diff --git a/app/boards/shields/kyria/keymaps/default/include/keymap.h b/app/boards/shields/kyria/keymaps/default/include/keymap.h
new file mode 100644
index 0000000..01cd9e5
--- /dev/null
+++ b/app/boards/shields/kyria/keymaps/default/include/keymap.h
@@ -0,0 +1,5 @@
+
+#include <dt-bindings/zmk/keys.h>
+
+#define CC_RAIS ZC_CSTM(1)
+#define CC_LOWR ZC_CSTM(2)
\ No newline at end of file
diff --git a/app/boards/shields/kyria/keymaps/default/keymap.c b/app/boards/shields/kyria/keymaps/default/keymap.c
new file mode 100644
index 0000000..067cd08
--- /dev/null
+++ b/app/boards/shields/kyria/keymaps/default/keymap.c
@@ -0,0 +1,34 @@
+
+#include <zmk/keys.h>
+#include <zmk/keymap.h>
+#include <keymap.h>
+
+bool zmk_handle_key_user(struct zmk_key_event *key_event)
+{
+	switch (key_event->key)
+	{
+	case CC_LOWR:
+		if (key_event->pressed)
+		{
+			zmk_keymap_layer_activate(1);
+		}
+		else
+		{
+			zmk_keymap_layer_deactivate(1);
+		}
+
+		return false;
+	case CC_RAIS:
+		if (key_event->pressed)
+		{
+			zmk_keymap_layer_activate(2);
+		}
+		else
+		{
+			zmk_keymap_layer_deactivate(2);
+		}
+		return false;
+	}
+
+	return true;
+};
diff --git a/app/boards/shields/kyria/keymaps/default/keymap.overlay b/app/boards/shields/kyria/keymaps/default/keymap.overlay
new file mode 100644
index 0000000..62c842d
--- /dev/null
+++ b/app/boards/shields/kyria/keymaps/default/keymap.overlay
@@ -0,0 +1,50 @@
+#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/keymap-transform.h>
+#include <keymap.h>
+
+/ {
+	chosen {
+		zmk,keymap = &keymap0;
+	};
+	
+	keymap0: keymap {
+		compatible = "zmk,keymap";
+		label ="Default Kyria Keymap";
+		layers = <&default>;
+		transform = <&default_transform>;
+	};
+
+	default_transform: keymap_transform_0 {
+		compatible = "zmk,keymap-transform";
+		map = <
+			IDENTITY_ROW(0, 6)       OFFSET_ROW(6, 0, 6)
+			IDENTITY_ROW(1, 6)       OFFSET_ROW(6, 1, 6)
+			IDENTITY_ROW(2, 8)       OFFSET_ROW(8, 2, 8)
+			OFFSET_ROW(3, 3, 5)      OFFSET_ROW(8, 3, 5)
+		>;
+	};
+
+	five_column_transform: keymap_transform_1 {
+		compatible = "zmk,keymap-transform";
+		map = <
+			IDENTITY_ROW(0, 5)       OFFSET_ROW(5, 0, 5)
+			IDENTITY_ROW(1, 5)       OFFSET_ROW(6, 1, 5)
+			IDENTITY_ROW(2, 7)       OFFSET_ROW(7, 2, 7)
+			OFFSET_ROW(2, 3, 5)      OFFSET_ROW(7, 3, 5)
+		>;
+	};
+
+	layers {
+		compatible = "zmk,layers";
+
+		default: layer_0 {
+			label = "DEFAULT";
+			keys = <
+	KC_ESC KC_Q KC_W KC_E KC_R KC_T                                   KC_Y KC_U KC_I KC_O KC_P KC_PIPE
+	KC_BKSP 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_LSFT KC_LSFT         KC_LSFT KC_LSFT  KC_N KC_M KC_CMMA KC_DOT KC_BSLH KC_MIN
+	                   KC_LGUI KC_DEL KC_RET KC_SPC KC_ESC  KC_RET  KC_SPC KC_TAB KC_BKSP KC_RALT
+	>;
+		};
+	};
+};
diff --git a/app/boards/shields/kyria/kyria.conf b/app/boards/shields/kyria/kyria.conf
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/app/boards/shields/kyria/kyria.conf
diff --git a/app/boards/shields/kyria/kyria.overlay b/app/boards/shields/kyria/kyria.overlay
new file mode 100644
index 0000000..af4e591
--- /dev/null
+++ b/app/boards/shields/kyria/kyria.overlay
@@ -0,0 +1,75 @@
+/*
+ * Copyright (c) 2020 Pete Johanson
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+/ {
+	chosen {
+		zmk,kscan = &kscan0;
+	};
+
+	kscan0: kscan_comp {
+		compatible = "zmk,kscan-composite";
+
+		label = "KSCAN_COMP";
+		rows = <4>;
+		columns = <16>;
+
+		left {
+			kscan = <&kscan_left>;
+		};
+
+		right {
+			kscan = <&kscan_right>;
+			 // TODO: Actually put this in the kscan driver, so it can report
+			 // HID events directly to host if plugged in directly.
+			column-offset = <8>;
+		};
+	};
+
+	kscan_left: kscan_left {
+		compatible = "gpio-kscan";
+		label = "KSCAN_LEFT";
+
+		diode-direction = "row2col";
+		row-gpios = <&pro_micro_pins 8 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+		            <&pro_micro_pins 7 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 6 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 4 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+
+		col-gpios = <&pro_micro_pins 10 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+		            <&pro_micro_pins 16 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 14 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 15 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 18 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 19 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 20 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 21 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+	};
+
+	kscan_right: kscan_right {
+		compatible = "gpio-kscan";
+		label = "KSCAN_RIGHT";
+
+		diode-direction = "row2col";
+		row-gpios = <&pro_micro_pins 8 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+		            <&pro_micro_pins 7 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 6 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 4 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+
+		col-gpios = <&pro_micro_pins 21 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+		            <&pro_micro_pins 20 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 19 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 18 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 15 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 14 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 16 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>,
+					<&pro_micro_pins 10 (GPIO_ACTIVE_LOW | GPIO_PULL_UP)>;
+	};
+
+	// TODO: Encoder node(s)
+	// TODO: OLED node
+	// TODO: RGB node(s)
+};
+
diff --git a/app/dts/bindings/zmk,keymap-transform.yaml b/app/dts/bindings/zmk,keymap-transform.yaml
new file mode 100644
index 0000000..24c3836
--- /dev/null
+++ b/app/dts/bindings/zmk,keymap-transform.yaml
@@ -0,0 +1,9 @@
+description: |
+  Defines a mapping from keymap logical positions to matrix physical positions
+
+compatible: "zmk,keymap-transform"
+
+properties:
+  map:
+    type: array
+    required: true
diff --git a/app/dts/bindings/zmk,keymap.yaml b/app/dts/bindings/zmk,keymap.yaml
index 8c56f93..b9517a3 100644
--- a/app/dts/bindings/zmk,keymap.yaml
+++ b/app/dts/bindings/zmk,keymap.yaml
@@ -4,6 +4,10 @@ description: |
 compatible: "zmk,keymap"
 
 properties:
+  transform:
+    type: phandle
+    required: false
+
   label:
     type: string
     required: true
diff --git a/app/include/dt-bindings/zmk/keymap-transform.h b/app/include/dt-bindings/zmk/keymap-transform.h
new file mode 100644
index 0000000..af19c21
--- /dev/null
+++ b/app/include/dt-bindings/zmk/keymap-transform.h
@@ -0,0 +1,13 @@
+
+#include <zmk/util.h>
+
+#define KT_ROW(item) (item >> 8)
+#define KT_COL(item) (item & 0xFF)
+
+#define _ROW_COL(row, col) (((row) << 8) + (col))
+
+#define _IDENTITY_ENTRY(col, row) _ROW_COL(row, col)
+#define IDENTITY_ROW(row, count) UTIL_LISTIFY(count, _IDENTITY_ENTRY, row)
+
+#define _OFFSET_ENTRY(col, offset, row) _ROW_COL(row, col + offset)
+#define OFFSET_ROW(offset, row, count) UTIL_LISTIFY(count, _OFFSET_ENTRY, offset, row)
\ No newline at end of file
diff --git a/app/include/zmk/util.h b/app/include/zmk/util.h
new file mode 100644
index 0000000..0436b6f
--- /dev/null
+++ b/app/include/zmk/util.h
@@ -0,0 +1,777 @@
+/*
+ * Copyright (c) 2011-2014, Wind River Systems, Inc.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ */
+
+#pragma once
+
+/** @brief Return larger value of two provided expressions.
+ *
+ * @note Arguments are evaluated twice. See Z_MAX for GCC only, single
+ * evaluation version.
+ */
+#ifndef MAX
+#define MAX(a, b) (((a) > (b)) ? (a) : (b))
+#endif
+
+/** @brief Return smaller value of two provided expressions.
+ *
+ * @note Arguments are evaluated twice. See Z_MIN for GCC only, single
+ * evaluation version.
+ */
+#ifndef MIN
+#define MIN(a, b) (((a) < (b)) ? (a) : (b))
+#endif
+
+#define BIT(n)  (1UL << (n))
+
+/** 64-bit unsigned integer with bit position _n set */
+#define BIT64(_n) (1ULL << (_n))
+
+/**
+ * @brief Macro sets or clears bit depending on boolean value
+ *
+ * @param var Variable to be altered
+ * @param bit Bit number
+ * @param set Value 0 clears bit, any other value sets bit
+ */
+#define WRITE_BIT(var, bit, set) \
+	((var) = (set) ? ((var) | BIT(bit)) : ((var) & ~BIT(bit)))
+
+#define BIT_MASK(n) (BIT(n) - 1)
+
+/**
+ * @brief Macro with empty replacement list
+ *
+ * This trivial definition is provided to use where macro is expected
+ * to evaluate to empty replacement string or when it is needed to
+ * cheat checkpatch.
+ *
+ * Examples
+ *
+ *	#define LIST_ITEM(n) , item##n
+ *
+ * would cause error with checkpatch, but:
+ *
+ *	#define LIST_TIEM(n) EMPTY, item##m
+ *
+ * would not.
+ */
+#define EMPTY
+
+/**
+ * @brief Get first argument from variable list of arguments
+ */
+#define GET_ARG1(arg1, ...) arg1
+
+/**
+ * @brief Get second argument from variable list of arguments
+ */
+#define GET_ARG2(arg1, arg2, ...) arg2
+
+/**
+ * @brief Get all arguments except the first one.
+ */
+#define GET_ARGS_LESS_1(val, ...) __VA_ARGS__
+
+/**
+ * Macros for doing code-generation with the preprocessor.
+ *
+ * Generally it is better to generate code with the preprocessor than
+ * to copy-paste code or to generate code with the build system /
+ * python script's etc.
+ *
+ * http://stackoverflow.com/a/12540675
+ */
+#define UTIL_EMPTY(...)
+#define UTIL_DEFER(...) __VA_ARGS__ UTIL_EMPTY()
+#define UTIL_OBSTRUCT(...) __VA_ARGS__ UTIL_DEFER(UTIL_EMPTY)()
+#define UTIL_EXPAND(...) __VA_ARGS__
+
+#define UTIL_EVAL(...)  UTIL_EVAL1(UTIL_EVAL1(UTIL_EVAL1(__VA_ARGS__)))
+#define UTIL_EVAL1(...) UTIL_EVAL2(UTIL_EVAL2(UTIL_EVAL2(__VA_ARGS__)))
+#define UTIL_EVAL2(...) UTIL_EVAL3(UTIL_EVAL3(UTIL_EVAL3(__VA_ARGS__)))
+#define UTIL_EVAL3(...) UTIL_EVAL4(UTIL_EVAL4(UTIL_EVAL4(__VA_ARGS__)))
+#define UTIL_EVAL4(...) UTIL_EVAL5(UTIL_EVAL5(UTIL_EVAL5(__VA_ARGS__)))
+#define UTIL_EVAL5(...) __VA_ARGS__
+
+#define UTIL_CAT(a, ...) UTIL_PRIMITIVE_CAT(a, __VA_ARGS__)
+#define UTIL_PRIMITIVE_CAT(a, ...) a##__VA_ARGS__
+
+#define UTIL_INC(x) UTIL_PRIMITIVE_CAT(UTIL_INC_, x)
+#define UTIL_INC_0 1
+#define UTIL_INC_1 2
+#define UTIL_INC_2 3
+#define UTIL_INC_3 4
+#define UTIL_INC_4 5
+#define UTIL_INC_5 6
+#define UTIL_INC_6 7
+#define UTIL_INC_7 8
+#define UTIL_INC_8 9
+#define UTIL_INC_9 10
+#define UTIL_INC_10 11
+#define UTIL_INC_11 12
+#define UTIL_INC_12 13
+#define UTIL_INC_13 14
+#define UTIL_INC_14 15
+#define UTIL_INC_15 16
+#define UTIL_INC_16 17
+#define UTIL_INC_17 18
+#define UTIL_INC_18 19
+#define UTIL_INC_19 20
+#define UTIL_INC_20 21
+#define UTIL_INC_21 22
+#define UTIL_INC_22 23
+#define UTIL_INC_23 24
+#define UTIL_INC_24 25
+#define UTIL_INC_25 26
+#define UTIL_INC_26 27
+#define UTIL_INC_27 28
+#define UTIL_INC_28 29
+#define UTIL_INC_29 30
+#define UTIL_INC_30 31
+#define UTIL_INC_31 32
+#define UTIL_INC_32 33
+#define UTIL_INC_33 34
+#define UTIL_INC_34 35
+#define UTIL_INC_35 36
+#define UTIL_INC_36 37
+#define UTIL_INC_37 38
+#define UTIL_INC_38 39
+#define UTIL_INC_39 40
+#define UTIL_INC_40 41
+#define UTIL_INC_41 42
+#define UTIL_INC_42 43
+#define UTIL_INC_43 44
+#define UTIL_INC_44 45
+#define UTIL_INC_45 46
+#define UTIL_INC_46 47
+#define UTIL_INC_47 48
+#define UTIL_INC_48 49
+#define UTIL_INC_49 50
+#define UTIL_INC_50 51
+#define UTIL_INC_51 52
+#define UTIL_INC_52 53
+#define UTIL_INC_53 54
+#define UTIL_INC_54 55
+#define UTIL_INC_55 56
+#define UTIL_INC_56 57
+#define UTIL_INC_57 58
+#define UTIL_INC_58 59
+#define UTIL_INC_59 60
+#define UTIL_INC_50 51
+#define UTIL_INC_51 52
+#define UTIL_INC_52 53
+#define UTIL_INC_53 54
+#define UTIL_INC_54 55
+#define UTIL_INC_55 56
+#define UTIL_INC_56 57
+#define UTIL_INC_57 58
+#define UTIL_INC_58 59
+#define UTIL_INC_59 60
+#define UTIL_INC_60 61
+#define UTIL_INC_61 62
+#define UTIL_INC_62 63
+#define UTIL_INC_63 64
+#define UTIL_INC_64 65
+#define UTIL_INC_65 66
+#define UTIL_INC_66 67
+#define UTIL_INC_67 68
+#define UTIL_INC_68 69
+#define UTIL_INC_69 70
+#define UTIL_INC_70 71
+#define UTIL_INC_71 72
+#define UTIL_INC_72 73
+#define UTIL_INC_73 74
+#define UTIL_INC_74 75
+#define UTIL_INC_75 76
+#define UTIL_INC_76 77
+#define UTIL_INC_77 78
+#define UTIL_INC_78 79
+#define UTIL_INC_79 80
+#define UTIL_INC_80 81
+#define UTIL_INC_81 82
+#define UTIL_INC_82 83
+#define UTIL_INC_83 84
+#define UTIL_INC_84 85
+#define UTIL_INC_85 86
+#define UTIL_INC_86 87
+#define UTIL_INC_87 88
+#define UTIL_INC_88 89
+#define UTIL_INC_89 90
+#define UTIL_INC_90 91
+#define UTIL_INC_91 92
+#define UTIL_INC_92 93
+#define UTIL_INC_93 94
+#define UTIL_INC_94 95
+#define UTIL_INC_95 96
+#define UTIL_INC_96 97
+#define UTIL_INC_97 98
+#define UTIL_INC_98 99
+#define UTIL_INC_99 100
+
+#define UTIL_DEC(x) UTIL_PRIMITIVE_CAT(UTIL_DEC_, x)
+#define UTIL_DEC_0 0
+#define UTIL_DEC_1 0
+#define UTIL_DEC_2 1
+#define UTIL_DEC_3 2
+#define UTIL_DEC_4 3
+#define UTIL_DEC_5 4
+#define UTIL_DEC_6 5
+#define UTIL_DEC_7 6
+#define UTIL_DEC_8 7
+#define UTIL_DEC_9 8
+#define UTIL_DEC_10 9
+#define UTIL_DEC_11 10
+#define UTIL_DEC_12 11
+#define UTIL_DEC_13 12
+#define UTIL_DEC_14 13
+#define UTIL_DEC_15 14
+#define UTIL_DEC_16 15
+#define UTIL_DEC_17 16
+#define UTIL_DEC_18 17
+#define UTIL_DEC_19 18
+#define UTIL_DEC_20 19
+#define UTIL_DEC_21 20
+#define UTIL_DEC_22 21
+#define UTIL_DEC_23 22
+#define UTIL_DEC_24 23
+#define UTIL_DEC_25 24
+#define UTIL_DEC_26 25
+#define UTIL_DEC_27 26
+#define UTIL_DEC_28 27
+#define UTIL_DEC_29 28
+#define UTIL_DEC_30 29
+#define UTIL_DEC_31 30
+#define UTIL_DEC_32 31
+#define UTIL_DEC_33 32
+#define UTIL_DEC_34 33
+#define UTIL_DEC_35 34
+#define UTIL_DEC_36 35
+#define UTIL_DEC_37 36
+#define UTIL_DEC_38 37
+#define UTIL_DEC_39 38
+#define UTIL_DEC_40 39
+#define UTIL_DEC_41 40
+#define UTIL_DEC_42 41
+#define UTIL_DEC_43 42
+#define UTIL_DEC_44 43
+#define UTIL_DEC_45 44
+#define UTIL_DEC_46 45
+#define UTIL_DEC_47 46
+#define UTIL_DEC_48 47
+#define UTIL_DEC_49 48
+#define UTIL_DEC_50 49
+#define UTIL_DEC_51 50
+#define UTIL_DEC_52 51
+#define UTIL_DEC_53 52
+#define UTIL_DEC_54 53
+#define UTIL_DEC_55 54
+#define UTIL_DEC_56 55
+#define UTIL_DEC_57 56
+#define UTIL_DEC_58 57
+#define UTIL_DEC_59 58
+#define UTIL_DEC_60 59
+#define UTIL_DEC_61 60
+#define UTIL_DEC_62 61
+#define UTIL_DEC_63 62
+#define UTIL_DEC_64 63
+#define UTIL_DEC_65 64
+#define UTIL_DEC_66 65
+#define UTIL_DEC_67 66
+#define UTIL_DEC_68 67
+#define UTIL_DEC_69 68
+#define UTIL_DEC_70 69
+#define UTIL_DEC_71 70
+#define UTIL_DEC_72 71
+#define UTIL_DEC_73 72
+#define UTIL_DEC_74 73
+#define UTIL_DEC_75 74
+#define UTIL_DEC_76 75
+#define UTIL_DEC_77 76
+#define UTIL_DEC_78 77
+#define UTIL_DEC_79 78
+#define UTIL_DEC_80 79
+#define UTIL_DEC_81 80
+#define UTIL_DEC_82 81
+#define UTIL_DEC_83 82
+#define UTIL_DEC_84 83
+#define UTIL_DEC_85 84
+#define UTIL_DEC_86 85
+#define UTIL_DEC_87 86
+#define UTIL_DEC_88 87
+#define UTIL_DEC_89 88
+#define UTIL_DEC_90 89
+#define UTIL_DEC_91 90
+#define UTIL_DEC_92 91
+#define UTIL_DEC_93 92
+#define UTIL_DEC_94 93
+#define UTIL_DEC_95 94
+#define UTIL_DEC_96 95
+#define UTIL_DEC_97 96
+#define UTIL_DEC_98 97
+#define UTIL_DEC_99 98
+#define UTIL_DEC_100 99
+#define UTIL_DEC_101 100
+#define UTIL_DEC_102 101
+#define UTIL_DEC_103 102
+#define UTIL_DEC_104 103
+#define UTIL_DEC_105 104
+#define UTIL_DEC_106 105
+#define UTIL_DEC_107 106
+#define UTIL_DEC_108 107
+#define UTIL_DEC_109 108
+#define UTIL_DEC_110 109
+#define UTIL_DEC_111 110
+#define UTIL_DEC_112 111
+#define UTIL_DEC_113 112
+#define UTIL_DEC_114 113
+#define UTIL_DEC_115 114
+#define UTIL_DEC_116 115
+#define UTIL_DEC_117 116
+#define UTIL_DEC_118 117
+#define UTIL_DEC_119 118
+#define UTIL_DEC_120 119
+#define UTIL_DEC_121 120
+#define UTIL_DEC_122 121
+#define UTIL_DEC_123 122
+#define UTIL_DEC_124 123
+#define UTIL_DEC_125 124
+#define UTIL_DEC_126 125
+#define UTIL_DEC_127 126
+#define UTIL_DEC_128 127
+#define UTIL_DEC_129 128
+#define UTIL_DEC_130 129
+#define UTIL_DEC_131 130
+#define UTIL_DEC_132 131
+#define UTIL_DEC_133 132
+#define UTIL_DEC_134 133
+#define UTIL_DEC_135 134
+#define UTIL_DEC_136 135
+#define UTIL_DEC_137 136
+#define UTIL_DEC_138 137
+#define UTIL_DEC_139 138
+#define UTIL_DEC_140 139
+#define UTIL_DEC_141 140
+#define UTIL_DEC_142 141
+#define UTIL_DEC_143 142
+#define UTIL_DEC_144 143
+#define UTIL_DEC_145 144
+#define UTIL_DEC_146 145
+#define UTIL_DEC_147 146
+#define UTIL_DEC_148 147
+#define UTIL_DEC_149 148
+#define UTIL_DEC_150 149
+#define UTIL_DEC_151 150
+#define UTIL_DEC_152 151
+#define UTIL_DEC_153 152
+#define UTIL_DEC_154 153
+#define UTIL_DEC_155 154
+#define UTIL_DEC_156 155
+#define UTIL_DEC_157 156
+#define UTIL_DEC_158 157
+#define UTIL_DEC_159 158
+#define UTIL_DEC_160 159
+#define UTIL_DEC_161 160
+#define UTIL_DEC_162 161
+#define UTIL_DEC_163 162
+#define UTIL_DEC_164 163
+#define UTIL_DEC_165 164
+#define UTIL_DEC_166 165
+#define UTIL_DEC_167 166
+#define UTIL_DEC_168 167
+#define UTIL_DEC_169 168
+#define UTIL_DEC_170 169
+#define UTIL_DEC_171 170
+#define UTIL_DEC_172 171
+#define UTIL_DEC_173 172
+#define UTIL_DEC_174 173
+#define UTIL_DEC_175 174
+#define UTIL_DEC_176 175
+#define UTIL_DEC_177 176
+#define UTIL_DEC_178 177
+#define UTIL_DEC_179 178
+#define UTIL_DEC_180 179
+#define UTIL_DEC_181 180
+#define UTIL_DEC_182 181
+#define UTIL_DEC_183 182
+#define UTIL_DEC_184 183
+#define UTIL_DEC_185 184
+#define UTIL_DEC_186 185
+#define UTIL_DEC_187 186
+#define UTIL_DEC_188 187
+#define UTIL_DEC_189 188
+#define UTIL_DEC_190 189
+#define UTIL_DEC_191 190
+#define UTIL_DEC_192 191
+#define UTIL_DEC_193 192
+#define UTIL_DEC_194 193
+#define UTIL_DEC_195 194
+#define UTIL_DEC_196 195
+#define UTIL_DEC_197 196
+#define UTIL_DEC_198 197
+#define UTIL_DEC_199 198
+#define UTIL_DEC_200 199
+#define UTIL_DEC_201 200
+#define UTIL_DEC_202 201
+#define UTIL_DEC_203 202
+#define UTIL_DEC_204 203
+#define UTIL_DEC_205 204
+#define UTIL_DEC_206 205
+#define UTIL_DEC_207 206
+#define UTIL_DEC_208 207
+#define UTIL_DEC_209 208
+#define UTIL_DEC_210 209
+#define UTIL_DEC_211 210
+#define UTIL_DEC_212 211
+#define UTIL_DEC_213 212
+#define UTIL_DEC_214 213
+#define UTIL_DEC_215 214
+#define UTIL_DEC_216 215
+#define UTIL_DEC_217 216
+#define UTIL_DEC_218 217
+#define UTIL_DEC_219 218
+#define UTIL_DEC_220 219
+#define UTIL_DEC_221 220
+#define UTIL_DEC_222 221
+#define UTIL_DEC_223 222
+#define UTIL_DEC_224 223
+#define UTIL_DEC_225 224
+#define UTIL_DEC_226 225
+#define UTIL_DEC_227 226
+#define UTIL_DEC_228 227
+#define UTIL_DEC_229 228
+#define UTIL_DEC_230 229
+#define UTIL_DEC_231 230
+#define UTIL_DEC_232 231
+#define UTIL_DEC_233 232
+#define UTIL_DEC_234 233
+#define UTIL_DEC_235 234
+#define UTIL_DEC_236 235
+#define UTIL_DEC_237 236
+#define UTIL_DEC_238 237
+#define UTIL_DEC_239 238
+#define UTIL_DEC_240 239
+#define UTIL_DEC_241 240
+#define UTIL_DEC_242 241
+#define UTIL_DEC_243 242
+#define UTIL_DEC_244 243
+#define UTIL_DEC_245 244
+#define UTIL_DEC_246 245
+#define UTIL_DEC_247 246
+#define UTIL_DEC_248 247
+#define UTIL_DEC_249 248
+#define UTIL_DEC_250 249
+#define UTIL_DEC_251 250
+#define UTIL_DEC_252 251
+#define UTIL_DEC_253 252
+#define UTIL_DEC_254 253
+#define UTIL_DEC_255 254
+#define UTIL_DEC_256 255
+
+#define UTIL_CHECK_N(x, n, ...) n
+#define UTIL_CHECK(...) UTIL_CHECK_N(__VA_ARGS__, 0,)
+
+#define UTIL_NOT(x) UTIL_CHECK(UTIL_PRIMITIVE_CAT(UTIL_NOT_, x))
+#define UTIL_NOT_0 ~, 1,
+
+#define UTIL_COMPL(b) UTIL_PRIMITIVE_CAT(UTIL_COMPL_, b)
+#define UTIL_COMPL_0 1
+#define UTIL_COMPL_1 0
+
+#define UTIL_BOOL(x) UTIL_COMPL(UTIL_NOT(x))
+
+#define UTIL_IIF(c) UTIL_PRIMITIVE_CAT(UTIL_IIF_, c)
+#define UTIL_IIF_0(t, ...) __VA_ARGS__
+#define UTIL_IIF_1(t, ...) t
+
+#define UTIL_IF(c) UTIL_IIF(UTIL_BOOL(c))
+
+/*
+ * These are like || and &&, but they do evaluation and
+ * short-circuiting at preprocessor time instead of runtime.
+ *
+ * UTIL_OR(foo, bar) is sometimes a replacement for (foo || bar)
+ * when "bar" is an expression that would cause a build
+ * error when "foo" is true.
+ *
+ * UTIL_AND(foo, bar) is sometimes a replacement for (foo && bar)
+ * when "bar" is an expression that would cause a build
+ * error when "foo" is false.
+ */
+#define UTIL_OR(a, b) COND_CODE_1(UTIL_BOOL(a), (a), (b))
+#define UTIL_AND(a, b) COND_CODE_1(UTIL_BOOL(a), (b), (0))
+
+#define UTIL_EAT(...)
+#define UTIL_EXPAND(...) __VA_ARGS__
+#define UTIL_WHEN(c) UTIL_IF(c)(UTIL_EXPAND, UTIL_EAT)
+
+#define UTIL_REPEAT(count, macro, ...)			    \
+	UTIL_WHEN(count)				    \
+	(						    \
+		UTIL_OBSTRUCT(UTIL_REPEAT_INDIRECT) ()	    \
+		(					    \
+			UTIL_DEC(count), macro, __VA_ARGS__ \
+		)					    \
+		UTIL_OBSTRUCT(macro)			    \
+		(					    \
+			UTIL_DEC(count), __VA_ARGS__	    \
+		)					    \
+	)
+#define UTIL_REPEAT_INDIRECT() UTIL_REPEAT
+
+/**
+ * @brief Generates a sequence of code.
+ *
+ * Useful for generating code like;
+ *
+ * NRF_PWM0, NRF_PWM1, NRF_PWM2,
+ *
+ * @arg LEN: The length of the sequence. Must be defined and less than
+ * 20.
+ *
+ * @arg F(i, ...): A macro function that accepts at least two arguments.
+ *  F is called repeatedly, the first argument is the index in the sequence,
+ *  the variable list of arguments passed to UTIL_LISTIFY are passed through
+ *  to F.
+ *
+ * Example:
+ *
+ *    \#define FOO(i, _) NRF_PWM ## i ,
+ *    { UTIL_LISTIFY(PWM_COUNT, FOO) }
+ *    The above two lines will generate the below:
+ *    { NRF_PWM0 , NRF_PWM1 , }
+ *
+ * @note Calling UTIL_LISTIFY with undefined arguments has undefined
+ * behavior.
+ */
+#define UTIL_LISTIFY(LEN, F, ...) UTIL_EVAL(UTIL_REPEAT(LEN, F, __VA_ARGS__))
+
+/* Set of internal macros used for FOR_EACH series of macros. */
+#define Z_FOR_EACH_IDX(count, n, macro, semicolon, fixed_arg0, fixed_arg1, ...)\
+	UTIL_WHEN(count)						\
+	(								\
+		UTIL_OBSTRUCT(macro)					\
+		(							\
+			fixed_arg0, fixed_arg1, n, GET_ARG1(__VA_ARGS__)\
+		)semicolon						\
+		UTIL_OBSTRUCT(Z_FOR_EACH_IDX_INDIRECT) ()		\
+		(							\
+			UTIL_DEC(count), UTIL_INC(n), macro, semicolon, \
+			fixed_arg0, fixed_arg1,				\
+			GET_ARGS_LESS_1(__VA_ARGS__)			\
+		)							\
+	)
+
+#define Z_FOR_EACH_IDX_INDIRECT() Z_FOR_EACH_IDX
+
+#define Z_FOR_EACH_IDX2(count, iter, macro, sc, fixed_arg0, fixed_arg1, ...) \
+	UTIL_EVAL(Z_FOR_EACH_IDX(count, iter, macro, sc,\
+				 fixed_arg0, fixed_arg1, __VA_ARGS__))
+
+#define Z_FOR_EACH_SWALLOW_NOTHING(F, fixed_arg, index, arg) \
+	F(index, arg, fixed_arg)
+
+#define Z_FOR_EACH_SWALLOW_FIXED_ARG(F, fixed_arg, index, arg) F(index, arg)
+
+#define Z_FOR_EACH_SWALLOW_INDEX_FIXED_ARG(F, fixed_arg, index, arg) F(arg)
+#define Z_FOR_EACH_SWALLOW_INDEX(F, fixed_arg, index, arg) F(arg, fixed_arg)
+
+/**
+ * @brief Calls macro F for each provided argument with index as first argument
+ *	  and nth parameter as the second argument.
+ *
+ * Example:
+ *
+ *     #define F(idx, x) int a##idx = x;
+ *     FOR_EACH_IDX(F, 4, 5, 6)
+ *
+ * will result in following code:
+ *
+ *     int a0 = 4;
+ *     int a1 = 5;
+ *     int a2 = 6;
+ *
+ * @param F Macro takes index and first argument and nth variable argument as
+ *	    the second one.
+ * @param ... Variable list of argument. For each argument macro F is executed.
+ */
+#define FOR_EACH_IDX(F, ...) \
+	Z_FOR_EACH_IDX2(NUM_VA_ARGS_LESS_1(__VA_ARGS__, _), \
+			0, Z_FOR_EACH_SWALLOW_FIXED_ARG, /*no ;*/, \
+			F, 0, __VA_ARGS__)
+
+/**
+ * @brief Calls macro F for each provided argument with index as first argument
+ *	  and nth parameter as the second argument and fixed argument as the
+ *	  third one.
+ *
+ * Example:
+ *
+ *     #define F(idx, x, fixed_arg) int fixed_arg##idx = x;
+ *     FOR_EACH_IDX_FIXED_ARG(F, a, 4, 5, 6)
+ *
+ * will result in following code:
+ *
+ *     int a0 = 4;
+ *     int a1 = 5;
+ *     int a2 = 6;
+ *
+ * @param F Macro takes index and first argument and nth variable argument as
+ *	    the second one and fixed argumnet as the third.
+ * @param fixed_arg Fixed argument passed to F macro.
+ * @param ... Variable list of argument. For each argument macro F is executed.
+ */
+#define FOR_EACH_IDX_FIXED_ARG(F, fixed_arg, ...) \
+	Z_FOR_EACH_IDX2(NUM_VA_ARGS_LESS_1(__VA_ARGS__, _), \
+			0, Z_FOR_EACH_SWALLOW_NOTHING, /*no ;*/, \
+			F, fixed_arg, __VA_ARGS__)
+
+/**
+ * @brief Calls macro F for each provided argument.
+ *
+ * Example:
+ *
+ *     #define F(x) int a##x;
+ *     FOR_EACH(F, 4, 5, 6)
+ *
+ * will result in following code:
+ *
+ *     int a4;
+ *     int a5;
+ *     int a6;
+ *
+ * @param F Macro takes nth variable argument as the argument.
+ * @param ... Variable list of argument. For each argument macro F is executed.
+ */
+#define FOR_EACH(F, ...) \
+	Z_FOR_EACH_IDX2(NUM_VA_ARGS_LESS_1(__VA_ARGS__, _), \
+			0, Z_FOR_EACH_SWALLOW_INDEX_FIXED_ARG, /*no ;*/, \
+			F, 0, __VA_ARGS__)
+
+/**
+ * @brief Calls macro F for each provided argument with additional fixed
+ *	  argument.
+ *
+ * After each iteration semicolon is added.
+ *
+ * Example:
+ *
+ *     static void func(int val, void *dev);
+ *     FOR_EACH_FIXED_ARG(func, dev, 4, 5, 6)
+ *
+ * will result in following code:
+ *
+ *     func(4, dev);
+ *     func(5, dev);
+ *     func(6, dev);
+ *
+ * @param F Macro takes nth variable argument as the first parameter and
+ *	     fixed argument as the second parameter.
+ * @param fixed_arg Fixed argument forward to macro execution for each argument.
+ * @param ... Variable list of argument. For each argument macro F is executed.
+ */
+#define FOR_EACH_FIXED_ARG(F, fixed_arg, ...) \
+	Z_FOR_EACH_IDX2(NUM_VA_ARGS_LESS_1(__VA_ARGS__, _), \
+			0, Z_FOR_EACH_SWALLOW_INDEX, ;, \
+			F, fixed_arg, __VA_ARGS__)
+
+/**@brief Implementation details for NUM_VAR_ARGS */
+#define NUM_VA_ARGS_LESS_1_IMPL(				\
+	_ignored,						\
+	_0, _1, _2, _3, _4, _5, _6, _7, _8, _9, _10,		\
+	_11, _12, _13, _14, _15, _16, _17, _18, _19, _20,	\
+	_21, _22, _23, _24, _25, _26, _27, _28, _29, _30,	\
+	_31, _32, _33, _34, _35, _36, _37, _38, _39, _40,	\
+	_41, _42, _43, _44, _45, _46, _47, _48, _49, _50,	\
+	_51, _52, _53, _54, _55, _56, _57, _58, _59, _60,	\
+	_61, _62, N, ...) N
+
+/**
+ * @brief Macro to get the number of arguments in a call variadic macro call.
+ * First argument is not counted.
+ *
+ * param[in]    ...     List of arguments
+ *
+ * @retval  Number of variadic arguments in the argument list
+ */
+#define NUM_VA_ARGS_LESS_1(...) \
+	NUM_VA_ARGS_LESS_1_IMPL(__VA_ARGS__, 63, 62, 61, \
+	60, 59, 58, 57, 56, 55, 54, 53, 52, 51,		 \
+	50, 49, 48, 47, 46, 45, 44, 43, 42, 41,		 \
+	40, 39, 38, 37, 36, 35, 34, 33, 32, 31,		 \
+	30, 29, 28, 27, 26, 25, 24, 23, 22, 21,		 \
+	20, 19, 18, 17, 16, 15, 14, 13, 12, 11,		 \
+	10, 9, 8, 7, 6, 5, 4, 3, 2, 1, 0, ~)
+
+/**
+ * Macro that process all arguments using given macro
+ *
+ * @deprecated Use FOR_EACH instead.
+ *
+ * @param ... Macro name to be used for argument processing followed by
+ *            arguments to process. Macro should have following
+ *            form: MACRO(argument).
+ *
+ * @return All arguments processed by given macro
+ */
+#define MACRO_MAP(...) __DEPRECATED_MACRO FOR_EACH(__VA_ARGS__)
+
+/**
+ * @brief Mapping macro that pastes results together
+ *
+ * Like @ref MACRO_MAP(), but pastes the results together into a
+ * single token by repeated application of @ref UTIL_CAT().
+ *
+ * For example, with this macro FOO:
+ *
+ *     #define FOO(x) item_##x##_
+ *
+ * MACRO_MAP_CAT(FOO, a, b, c) expands to the token:
+ *
+ *     item_a_item_b_item_c_
+ *
+ * @param ... Macro to expand on each argument, followed by its
+ *            arguments. (The macro should take exactly one argument.)
+ * @return The results of expanding the macro on each argument, all pasted
+ *         together
+ */
+#define MACRO_MAP_CAT(...) MACRO_MAP_CAT_(__VA_ARGS__)
+#define MACRO_MAP_CAT_(...)						\
+	/* To make sure it works also for 2 arguments in total */	\
+	MACRO_MAP_CAT_N(NUM_VA_ARGS_LESS_1(__VA_ARGS__), __VA_ARGS__)
+
+/**
+ * @brief Mapping macro that pastes a fixed number of results together
+ *
+ * Similar to @ref MACRO_MAP_CAT(), but expects a fixed number of
+ * arguments. If more arguments are given than are expected, the rest
+ * are ignored.
+ *
+ * @param N   Number of arguments to map
+ * @param ... Macro to expand on each argument, followed by its
+ *            arguments. (The macro should take exactly one argument.)
+ * @return The results of expanding the macro on each argument, all pasted
+ *         together
+ */
+#define MACRO_MAP_CAT_N(N, ...) MACRO_MAP_CAT_N_(N, __VA_ARGS__)
+#define MACRO_MAP_CAT_N_(N, ...) UTIL_CAT(MACRO_MC_, N)(__VA_ARGS__,)
+
+#define MACRO_MC_0(...)
+#define MACRO_MC_1(m, a, ...)  m(a)
+#define MACRO_MC_2(m, a, ...)  UTIL_CAT(m(a), MACRO_MC_1(m, __VA_ARGS__,))
+#define MACRO_MC_3(m, a, ...)  UTIL_CAT(m(a), MACRO_MC_2(m, __VA_ARGS__,))
+#define MACRO_MC_4(m, a, ...)  UTIL_CAT(m(a), MACRO_MC_3(m, __VA_ARGS__,))
+#define MACRO_MC_5(m, a, ...)  UTIL_CAT(m(a), MACRO_MC_4(m, __VA_ARGS__,))
+#define MACRO_MC_6(m, a, ...)  UTIL_CAT(m(a), MACRO_MC_5(m, __VA_ARGS__,))
+#define MACRO_MC_7(m, a, ...)  UTIL_CAT(m(a), MACRO_MC_6(m, __VA_ARGS__,))
+#define MACRO_MC_8(m, a, ...)  UTIL_CAT(m(a), MACRO_MC_7(m, __VA_ARGS__,))
+#define MACRO_MC_9(m, a, ...)  UTIL_CAT(m(a), MACRO_MC_8(m, __VA_ARGS__,))
+#define MACRO_MC_10(m, a, ...) UTIL_CAT(m(a), MACRO_MC_9(m, __VA_ARGS__,))
+#define MACRO_MC_11(m, a, ...) UTIL_CAT(m(a), MACRO_MC_10(m, __VA_ARGS__,))
+#define MACRO_MC_12(m, a, ...) UTIL_CAT(m(a), MACRO_MC_11(m, __VA_ARGS__,))
+#define MACRO_MC_13(m, a, ...) UTIL_CAT(m(a), MACRO_MC_12(m, __VA_ARGS__,))
+#define MACRO_MC_14(m, a, ...) UTIL_CAT(m(a), MACRO_MC_13(m, __VA_ARGS__,))
+#define MACRO_MC_15(m, a, ...) UTIL_CAT(m(a), MACRO_MC_14(m, __VA_ARGS__,))
+
diff --git a/app/src/keymap.c b/app/src/keymap.c
index 569a2cc..a1ed3ff 100644
--- a/app/src/keymap.c
+++ b/app/src/keymap.c
@@ -2,10 +2,57 @@
 #include <logging/log.h>
 LOG_MODULE_DECLARE(zmk, CONFIG_ZMK_LOG_LEVEL);
 #include <zmk/keymap.h>
+#include <dt-bindings/zmk/keymap-transform.h>
+#include <sys/util.h>
 
 static u32_t zmk_keymap_layer_state = 0;
 static u8_t zmk_keymap_layer_default = 0;
 
+#if DT_NODE_HAS_PROP(ZMK_KEYMAP_NODE, transform)
+#define ZMK_KEYMAP_TRANSFORM_NODE DT_PHANDLE(ZMK_KEYMAP_NODE, transform)
+#define ZMK_KEYMAP_LEN DT_PROP_LEN(ZMK_KEYMAP_TRANSFORM_NODE, map)
+
+#define _TRANSFORM_ENTRY(i, l) \
+	[(KT_ROW(DT_PROP_BY_IDX(ZMK_KEYMAP_TRANSFORM_NODE, map, i)) * ZMK_MATRIX_COLS) + KT_COL(DT_PROP_BY_IDX(ZMK_KEYMAP_TRANSFORM_NODE, map, i))] = DT_PROP_BY_IDX(DT_PHANDLE_BY_IDX(ZMK_KEYMAP_NODE, layers, l), keys, i),
+
+#define TRANSFORMED_LAYER(idx) \
+  { UTIL_LISTIFY(ZMK_KEYMAP_LEN, _TRANSFORM_ENTRY, idx) }
+
+static zmk_key zmk_keymap[ZMK_KEYMAP_LAYERS_LEN][ZMK_MATRIX_ROWS * ZMK_MATRIX_COLS] = {
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 0)
+	TRANSFORMED_LAYER(0),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 1)
+	TRANSFORMED_LAYER(1),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 2)
+	TRANSFORMED_LAYER(2),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 3)
+	TRANSFORMED_LAYER(3),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 4)
+	TRANSFORMED_LAYER(4),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 5)
+	TRANSFORMED_LAYER(5),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 6)
+	TRANSFORMED_LAYER(6),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 7)
+	TRANSFORMED_LAYER(7),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 8)
+	TRANSFORMED_LAYER(8),
+#endif
+#if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 9)
+	TRANSFORMED_LAYER(9),
+#endif
+};
+
+#else
+
 static zmk_key zmk_keymap[ZMK_KEYMAP_LAYERS_LEN][ZMK_MATRIX_ROWS * ZMK_MATRIX_COLS] = {
 #if DT_PROP_HAS_IDX(ZMK_KEYMAP_NODE, layers, 0)
 	DT_PROP_BY_PHANDLE_IDX(ZMK_KEYMAP_NODE, layers, 0, keys),
@@ -33,6 +80,8 @@ static zmk_key zmk_keymap[ZMK_KEYMAP_LAYERS_LEN][ZMK_MATRIX_ROWS * ZMK_MATRIX_CO
 #endif
 };
 
+#endif
+
 #define SET_LAYER_STATE(layer, state)                \
 	if (layer >= 32)                                 \
 	{                                                \