From bc6b57b8c01968eaf372d29f6658e975373cb6b5 Mon Sep 17 00:00:00 2001
From: Kelly Helmut Lord <helmut@helmutlord.com>
Date: Sun, 1 Oct 2023 21:02:12 -0400
Subject: [PATCH] boards: nrf52840dk_nrf52840: default kscan

Adds a default kscan and keymap for the nRF52840DK

Signed-off-by: Kelly Helmut Lord <helmut@helmutlord.com>
---
 app/boards/nrf52840dk_nrf52840.keymap  | 16 +++++++++++++
 app/boards/nrf52840dk_nrf52840.overlay | 32 ++++++++++++++++++++++++++
 2 files changed, 48 insertions(+)
 create mode 100644 app/boards/nrf52840dk_nrf52840.keymap
 create mode 100644 app/boards/nrf52840dk_nrf52840.overlay

diff --git a/app/boards/nrf52840dk_nrf52840.keymap b/app/boards/nrf52840dk_nrf52840.keymap
new file mode 100644
index 00000000..8601f95f
--- /dev/null
+++ b/app/boards/nrf52840dk_nrf52840.keymap
@@ -0,0 +1,16 @@
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+
+/ {
+    keymap {
+        compatible = "zmk,keymap";
+
+        layer_1 {
+            label = "base";
+            bindings = <
+                &kp A &kp B
+                &kp C &kp D
+            >;
+        };
+    };
+};
diff --git a/app/boards/nrf52840dk_nrf52840.overlay b/app/boards/nrf52840dk_nrf52840.overlay
new file mode 100644
index 00000000..e6091b78
--- /dev/null
+++ b/app/boards/nrf52840dk_nrf52840.overlay
@@ -0,0 +1,32 @@
+#include <behaviors.dtsi>
+#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/matrix_transform.h>
+
+/ {
+    chosen {
+        zmk,kscan = &kscan0;
+        zmk,matrix-transform = &layout_grid_transform;
+    };
+
+    kscan0: kscan {
+        compatible = "zmk,kscan-gpio-direct";
+        label = "direct";
+        input-gpios
+            = <&gpio0 11 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>,
+            <&gpio0 12 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>,
+            <&gpio0 24 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>,
+            <&gpio0 25 (GPIO_PULL_UP | GPIO_ACTIVE_LOW)>
+            ;
+    };
+
+    layout_grid_transform:
+        keymap_transform_0 {
+            compatible = "zmk,matrix-transform";
+            columns = <2>;
+            rows = <2>;
+            map = <
+            RC(0,0) RC(0,1)
+            RC(1,0) RC(1,1)
+            >;
+    };
+};