Device migrations, new drivers, cleanup (#567)

* **New Features**
  * Added native display support for ST7796, ILI9341, and ST7789 panels across supported boards.
  * Added FT5x06 and FT6x36 touchscreen support.
  * Generic PWM driver
  * ESP32 PWM driver
  * Generic RGB LED driver
  * RGB PWM LED driver
  * RGB GPIO LED driver
  * Implementation of RGB LED for various boards

* **Improvements**
  * Updated board hardware descriptions to use explicit display/touch/backlight device-tree bindings and disabled deprecated HAL usage.
  * Improved display and touch-driver cleanup to prevent stale resources and improve shutdown reliability.
  * Pinned esp-hosted library to a fixed version
 
* **Deletions**
  * Obsolete placeholder display
  * Legacy ILI9488 support.
  * ESP32-specific LEDC PWM implementation

Devices/cyd-e32r32p/CMakeLists.txt

@@ -2,5 +2,5 @@ file(GLOB_RECURSE SOURCE_FILES source/*.c*)
 
 idf_component_register(
     SRCS ${SOURCE_FILES}
-    REQUIRES TactilityKernel driver
+    REQUIRES TactilityKernel
 )

Devices/cyd-e32r32p/cyd,e32r32p.dts

@@ -8,7 +8,9 @@
 #include <tactility/bindings/esp32_i2c.h>
 #include <tactility/bindings/esp32_spi.h>
 #include <tactility/bindings/esp32_sdspi.h>
-#include <tactility/bindings/esp32_ledc_backlight.h>
+#include <tactility/bindings/esp32_pwm_ledc.h>
+#include <tactility/bindings/pwm_backlight.h>
+#include <tactility/bindings/rgb_led_pwm.h>
 #include <bindings/st7789.h>
 #include <bindings/xpt2046.h>
 
@@ -40,6 +42,43 @@
 		channels = <ADC_CHANNEL_6 ADC_ATTEN_DB_12 ADC_BITWIDTH_DEFAULT>;
 	};
 
+	rgb_led_channel_red {
+		compatible = "espressif,esp32-pwm-ledc";
+		pin = <&gpio0 22 GPIO_FLAG_NONE>;
+		period-ns = <500000>;
+		ledc-timer = <0>;
+		ledc-channel = <0>;
+		inverted;
+	};
+
+	rgb_led_channel_green {
+		compatible = "espressif,esp32-pwm-ledc";
+		pin = <&gpio0 16 GPIO_FLAG_NONE>;
+		period-ns = <500000>;
+		ledc-timer = <0>;
+		ledc-channel = <1>;
+		inverted;
+	};
+
+	rgb_led_channel_blue {
+		compatible = "espressif,esp32-pwm-ledc";
+		pin = <&gpio0 17 GPIO_FLAG_NONE>;
+		period-ns = <500000>;
+		ledc-timer = <0>;
+		ledc-channel = <2>;
+		inverted;
+	};
+
+	rgb_led_pwm {
+		compatible = "rgb-led-pwm";
+		pwm-red = <&rgb_led_channel_red>;
+		pwm-green = <&rgb_led_channel_green>;
+		pwm-blue = <&rgb_led_channel_blue>;
+		// Default is red, and we want to reset it to off by default
+		default-color = <0 0 0>;
+		enabled;
+	};
+
 	// Matches the deprecated HAL's old ChargeFromAdcVoltage config: adcMultiplier=2.11,
 	// adcRefVoltage=3.3 (default), voltageMin/Max=3.2/4.2 (default, same as battery-sense's own
 	// fixed curve - see TactilityKernel/source/drivers/battery_sense.cpp).
@@ -50,13 +89,20 @@
 		multiplier = <2110>;
 	};
 
+	display_backlight_pwm {
+		compatible = "espressif,esp32-pwm-ledc";
+		pin = <&gpio0 27 GPIO_FLAG_NONE>;
+		period-ns = <25000>;
+		ledc-timer = <1>;
+		ledc-channel = <3>;
+	};
+
 	display_backlight {
-		compatible = "espressif,esp32-ledc-backlight";
+		compatible = "pwm-backlight";
 		// Off by default so display power-on won't show the screen from before the last power loss.
 		// The display backlight is turned on during the boot process.
 		status = "disabled";
-		pin-backlight = <&gpio0 27 GPIO_FLAG_NONE>;
-		frequency-hz = <40000>;
+		pwm = <&display_backlight_pwm>;
 	};
 
 	spi0 {

Devices/cyd-e32r32p/source/module.cpp

@@ -3,12 +3,10 @@
 extern "C" {
 
 static error_t start() {
-    // Empty for now
     return ERROR_NONE;
 }
 
 static error_t stop() {
-    // Empty for now
     return ERROR_NONE;
 }