Remove old HAL components and refactored GPS-related code (#583)

- Added generic GPS/GNSS support with device detection, configuration, and persistent settings.
- Improved device and module lifecycle management.
- Added flexible filesystem locking support for displays and storage.
- Improved display-idle and keyboard backlight handling.
- Updated architecture, driver, module, testing, and licensing documentation.
- Removed old HAL device and related code.

Devices/lilygo-tdeck-plus/source/module.cpp

@@ -1,75 +1,57 @@
-#include <tactility/module.h>
+#include <tactility/delay.h>
 #include <tactility/error.h>
 #include <tactility/log.h>
 #include <tactility/lvgl_module.h>
+#include <tactility/module.h>
 
 #include <Tactility/SystemEvents.h>
 #include <Tactility/LogMessages.h>
-#include <Tactility/hal/Configuration.h>
-#include <Tactility/hal/gps/GpsConfiguration.h>
-#include <Tactility/kernel/Kernel.h>
-#include <Tactility/lvgl/LvglSync.h>
-#include <Tactility/service/gps/GpsService.h>
 #include <Tactility/settings/TrackballSettings.h>
 
 #include <lilygo/drivers/trackball.h>
 #include <lilygo/drivers/tdeck_power_on.h>
 
-#include <driver/gpio.h>
-
 constexpr auto* TAG = "tdeck-plus";
 
 extern "C" {
 
-void subscribe_events() {
-    tt::kernel::subscribeSystemEvent(tt::kernel::SystemEvent::BootSplash, [](tt::kernel::SystemEvent event) {
-        auto gps_service = tt::service::gps::findGpsService();
-        if (gps_service != nullptr) {
-            std::vector<tt::hal::gps::GpsConfiguration> gps_configurations;
-            gps_service->getGpsConfigurations(gps_configurations);
-            if (gps_configurations.empty()) {
-                if (gps_service->addGpsConfiguration(tt::hal::gps::GpsConfiguration {.uartName = "uart0", .baudRate = 38400, .model = tt::hal::gps::GpsModel::UBLOX10})) {
-                    LOG_I(TAG, "Configured internal GPS");
-                } else {
-                    LOG_E(TAG, "Failed to configure internal GPS");
-                }
-            }
-        }
-    });
+static tt::kernel::SystemEventSubscription tdeck_boot_splash_subscription = tt::kernel::NoSystemEventSubscription;
 
-    // The kernel trackball device is already started by kernel_init(); this just registers it as an
-    // LVGL input device and applies persisted settings, both of which require LVGL to be up first.
-    tt::kernel::subscribeSystemEvent(tt::kernel::SystemEvent::BootSplash, [](tt::kernel::SystemEvent event) {
-        auto tbSettings = tt::settings::trackball::loadOrGetDefault();
-        lvgl_lock();
-        if (trackball::init() != nullptr) {
-            trackball::setMode(tbSettings.trackballMode == tt::settings::trackball::TrackballMode::Pointer
-                ? trackball::Mode::Pointer
-                : trackball::Mode::Encoder);
-            trackball::setEncoderSensitivity(tbSettings.encoderSensitivity);
-            trackball::setPointerSensitivity(tbSettings.pointerSensitivity);
-            trackball::setEnabled(tbSettings.trackballEnabled);
-        }
-        lvgl_unlock();
-    });
+void init_trackball() {
+    auto tbSettings = tt::settings::trackball::loadOrGetDefault();
+    lvgl_lock();
+    if (trackball::init() != nullptr) {
+        trackball::setMode(tbSettings.trackballMode == tt::settings::trackball::TrackballMode::Pointer
+            ? trackball::Mode::Pointer
+            : trackball::Mode::Encoder);
+        trackball::setEncoderSensitivity(tbSettings.encoderSensitivity);
+        trackball::setPointerSensitivity(tbSettings.pointerSensitivity);
+        trackball::setEnabled(tbSettings.trackballEnabled);
+    }
+    lvgl_unlock();
 }
 
 static error_t start() {
     LOG_I(TAG, LOG_MESSAGE_POWER_ON_START);
+
     if (!tdeck_power_on()) {
         LOG_E(TAG, LOG_MESSAGE_POWER_ON_FAILED);
         return ERROR_RESOURCE;
     }
 
     // Avoids crash when no SD card is inserted. It's unknown why, but likely is related to power draw.
-    tt::kernel::delayMillis(100);
+    delay_millis(100);
 
-    subscribe_events();
+    tdeck_boot_splash_subscription = tt::kernel::subscribeSystemEvent(tt::kernel::SystemEvent::BootSplash, [](tt::kernel::SystemEvent event) {
+        init_trackball();
+    });
 
     return ERROR_NONE;
 }
 
 static error_t stop() {
+    tt::kernel::unsubscribeSystemEvent(tdeck_boot_splash_subscription);
+    tdeck_boot_splash_subscription = tt::kernel::NoSystemEventSubscription;
     return ERROR_NONE;
 }
 
@@ -77,8 +59,6 @@ Module lilygo_tdeck_plus_module = {
     .name = "lilygo-tdeck-plus",
     .start = start,
     .stop = stop,
-    .symbols = nullptr,
-    .internal = nullptr
 };
 
 }