Merge develop into main (#494)

* Updated runtime gating to enable LilyGO T-Deck specific apps and services
  * New device compatibility and model-detection APIs
  * Added a buffer-overflow error code and message
  * Updated GitHub Actions checkout to v4
  * Adjusted an LVGL-related library version
  * Device config now emits a T-Deck workaround flag when applicable
  * Removed internal developer comments and minor cleanups

TactilityKernel/Source/device.cpp

@@ -277,6 +277,11 @@ bool device_is_ready(const struct Device* device) {
     return device->internal->state.started;
 }
 
+bool device_is_compatible(const struct Device* device, const char* compatible) {
+    if (device->internal->driver == nullptr) return false;
+    return driver_is_compatible(device->internal->driver, compatible);
+}
+
 void device_set_driver_data(struct Device* device, void* driver_data) {
     device->internal->driver_data = driver_data;
 }

TactilityKernel/Source/drivers/root.cpp

@@ -1,10 +1,17 @@
 // SPDX-License-Identifier: Apache-2.0
 
+#include <tactility/device.h>
 #include <tactility/driver.h>
 #include <tactility/drivers/root.h>
+#include <cstring>
 
 extern "C" {
 
+bool root_is_model(const struct Device* device, const char* buffer) {
+    auto* config = static_cast<const RootConfig*>(device->config);
+    return strcmp(config->model, buffer) == 0;
+}
+
 Driver root_driver = {
     .name = "root",
     .compatible = (const char*[]) { "root", nullptr },
@@ -12,7 +19,8 @@ Driver root_driver = {
     .stop_device = nullptr,
     .api = nullptr,
     .device_type = nullptr,
-    .owner = nullptr
+    .owner = nullptr,
+    .internal = nullptr
 };
 
 }

TactilityKernel/Source/error.cpp

@@ -29,6 +29,8 @@ const char* error_to_string(error_t error) {
             return "not supported";
         case ERROR_NOT_ALLOWED:
             return "not allowed";
+        case ERROR_BUFFER_OVERFLOW:
+            return "buffer overflow";
         default:
             return "unknown";
     }

TactilityKernel/Source/kernel_symbols.c

@@ -3,6 +3,7 @@
 #include <tactility/drivers/gpio_controller.h>
 #include <tactility/drivers/i2c_controller.h>
 #include <tactility/drivers/i2s_controller.h>
+#include <tactility/drivers/root.h>
 #include <tactility/drivers/spi_controller.h>
 #include <tactility/drivers/uart_controller.h>
 #include <tactility/concurrent/dispatcher.h>
@@ -36,6 +37,7 @@ const struct ModuleSymbol KERNEL_SYMBOLS[] = {
     DEFINE_MODULE_SYMBOL(device_get_driver_data),
     DEFINE_MODULE_SYMBOL(device_is_added),
     DEFINE_MODULE_SYMBOL(device_is_ready),
+    DEFINE_MODULE_SYMBOL(device_is_compatible),
     DEFINE_MODULE_SYMBOL(device_lock),
     DEFINE_MODULE_SYMBOL(device_try_lock),
     DEFINE_MODULE_SYMBOL(device_unlock),
@@ -79,6 +81,8 @@ const struct ModuleSymbol KERNEL_SYMBOLS[] = {
     DEFINE_MODULE_SYMBOL(i2s_controller_get_config),
     DEFINE_MODULE_SYMBOL(i2s_controller_reset),
     DEFINE_MODULE_SYMBOL(I2S_CONTROLLER_TYPE),
+    // drivers/root
+    DEFINE_MODULE_SYMBOL(root_is_model),
     // drivers/spi_controller
     DEFINE_MODULE_SYMBOL(spi_controller_lock),
     DEFINE_MODULE_SYMBOL(spi_controller_try_lock),