From ee297a31b539bbe82b3fb76bd4daed2010d9be93 Mon Sep 17 00:00:00 2001
From: cyril279 <cyril.x9@gmail.com>
Date: Wed, 8 Nov 2023 12:30:21 -0700
Subject: [PATCH] rev1350: Add backlight support

---
 .../boards/shields/rev1350/Kconfig.defconfig  | 12 +++++++-
 config/boards/shields/rev1350/rev1350.conf    |  5 ++++
 config/boards/shields/rev1350/rev1350.keymap  |  4 +--
 config/boards/shields/rev1350/rev1350.overlay | 30 +++++++++++++++++++
 4 files changed, 48 insertions(+), 3 deletions(-)
 create mode 100644 config/boards/shields/rev1350/rev1350.conf

diff --git a/config/boards/shields/rev1350/Kconfig.defconfig b/config/boards/shields/rev1350/Kconfig.defconfig
index fc50219..db224ef 100644
--- a/config/boards/shields/rev1350/Kconfig.defconfig
+++ b/config/boards/shields/rev1350/Kconfig.defconfig
@@ -6,4 +6,14 @@ if SHIELD_REV1350
 config ZMK_KEYBOARD_NAME
     default "rev1350"
 
-endif
+endif # SHIELD_REV1350
+
+if ZMK_BACKLIGHT
+
+config PWM
+    default y
+
+config LED_PWM
+    default y
+
+endif # ZMK_BACKLIGHT
diff --git a/config/boards/shields/rev1350/rev1350.conf b/config/boards/shields/rev1350/rev1350.conf
new file mode 100644
index 0000000..e4467f5
--- /dev/null
+++ b/config/boards/shields/rev1350/rev1350.conf
@@ -0,0 +1,5 @@
+CONFIG_ZMK_BACKLIGHT=y
+CONFIG_ZMK_BACKLIGHT_ON_START=y
+CONFIG_ZMK_BACKLIGHT_BRT_START=11
+CONFIG_ZMK_BACKLIGHT_BRT_STEP=5
+CONFIG_ZMK_BACKLIGHT_AUTO_OFF_IDLE=y
diff --git a/config/boards/shields/rev1350/rev1350.keymap b/config/boards/shields/rev1350/rev1350.keymap
index eaa90e9..e24bbc5 100644
--- a/config/boards/shields/rev1350/rev1350.keymap
+++ b/config/boards/shields/rev1350/rev1350.keymap
@@ -5,9 +5,9 @@
  */
 
 #include <behaviors.dtsi>
-#include <dt-bindings/zmk/keys.h>
+#include <dt-bindings/zmk/backlight>
 #include <dt-bindings/zmk/bt.h>
-#include <dt-bindings/zmk/rgb.h>
+#include <dt-bindings/zmk/keys.h>
 
 #define DEFAULT 0
 #define LOWER   1
diff --git a/config/boards/shields/rev1350/rev1350.overlay b/config/boards/shields/rev1350/rev1350.overlay
index 3ecd43a..3415b2d 100644
--- a/config/boards/shields/rev1350/rev1350.overlay
+++ b/config/boards/shields/rev1350/rev1350.overlay
@@ -10,6 +10,13 @@
     chosen {
         zmk,kscan = &kscan0;
         zmk,matrix_transform = &default_transform;
+        zmk,backlight = &backlight;
+    };
+    backlight: pwmleds {
+        compatible = "pwm-leds";
+        pwm_led_0 {
+            pwms = <&pwm0 0 PWM_MSEC(10) PWM_POLARITY_NORMAL>;
+        };
     };
 
     default_transform: keymap_transform_0 {
@@ -50,3 +57,26 @@ RC(4,0) RC(4,1) RC(4,2) RC(4,3) RC(4,4) RC(4,5) RC(5,0) RC(5,1) RC(5,2) RC(5,3)
             ;
     };
 };
+
+
+&pinctrl {
+    // Other pinctrl definitions for other hardware
+    pwm0_default: pwm0_default {
+        group1 {
+            psels = <NRF_PSEL(PWM_OUT0, 0, 9)>;
+        };
+    };
+    pwm0_sleep: pwm0_sleep {
+        group1 {
+            psels = <NRF_PSEL(PWM_OUT0, 0, 9)>;
+            low-power-enable;
+        };
+    };
+};
+
+&pwm0 {
+    status = "okay";
+    pinctrl-0 = <&pwm0_default>;
+    pinctrl-1 = <&pwm0_sleep>;
+    pinctrl-names = "default", "sleep";
+};