Add kernel drivers for SPI and UART and make locking APIs more consistent (#489)

- Add kernel support for SPI driver
- Add kernel support for UART driver
- Implemented ESP32 UART kernel driver
- Update existing UART-related code in Tactility to use new kernel driver
- Remove UART from tt::hal::Configuration
- Remove tt_hal_uart functionality but keep functions for now
- Update devicetrees for UART changes
- Kernel mutex and recursive mutex: improved locking API design
- Other kernel improvements
- Added device_exists_of_type() and device_find_by_name()

Devices/lilygo-tdeck/Source/Configuration.cpp

@@ -4,6 +4,7 @@
 #include "devices/Sdcard.h"
 #include "devices/TdeckKeyboard.h"
 #include "devices/TrackballDevice.h"
+#include <driver/gpio.h>
 
 #include <Tactility/hal/Configuration.h>
 #include <Tactility/lvgl/LvglSync.h>
@@ -50,30 +51,5 @@ extern const Configuration hardwareConfiguration = {
             .isMutable = false,
             .lock = tt::lvgl::getSyncLock() // esp_lvgl_port owns the lock for the display
         }
-    },
-    .uart {
-        uart::Configuration {
-            .name = "Grove",
-            .port = UART_NUM_1,
-            .rxPin = GPIO_NUM_44,
-            .txPin = GPIO_NUM_43,
-            .rtsPin = GPIO_NUM_NC,
-            .ctsPin = GPIO_NUM_NC,
-            .rxBufferSize = 1024,
-            .txBufferSize = 1024,
-            .config = {
-                .baud_rate = 38400,
-                .data_bits = UART_DATA_8_BITS,
-                .parity    = UART_PARITY_DISABLE,
-                .stop_bits = UART_STOP_BITS_1,
-                .flow_ctrl = UART_HW_FLOWCTRL_DISABLE,
-                .rx_flow_ctrl_thresh = 0,
-                .source_clk = UART_SCLK_DEFAULT,
-                .flags = {
-                    .allow_pd = 0,
-                    .backup_before_sleep = 0,
-                }
-            }
-        }
     }
 };

Devices/lilygo-tdeck/Source/Init.cpp

@@ -58,7 +58,7 @@ bool initBoot() {
             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 = "Grove", .baudRate = 38400, .model = tt::hal::gps::GpsModel::UBLOX10})) {
+                if (gps_service->addGpsConfiguration(tt::hal::gps::GpsConfiguration {.uartName = "uart1", .baudRate = 38400, .model = tt::hal::gps::GpsModel::UBLOX10})) {
                     LOGGER.info("Configured internal GPS");
                 } else {
                     LOGGER.error("Failed to configure internal GPS");

Devices/lilygo-tdeck/lilygo,tdeck.dts

@@ -4,6 +4,7 @@
 #include <tactility/bindings/esp32_gpio.h>
 #include <tactility/bindings/esp32_i2c.h>
 #include <tactility/bindings/esp32_i2s.h>
+#include <tactility/bindings/esp32_uart.h>
 
 // Reference: https://wiki.lilygo.cc/get_started/en/Wearable/T-Deck-Plus/T-Deck-Plus.html#Pin-Overview
 / {
@@ -40,4 +41,13 @@
 		pin-data-in = <GPIO_PIN_NONE>;
 		pin-mclk = <GPIO_PIN_NONE>;
 	};
+
+	uart1 {
+		compatible = "espressif,esp32-uart";
+		port = <UART_NUM_1>;
+		pin-tx = <43>;
+		pin-rx = <44>;
+		pin-cts = <GPIO_PIN_NONE>;
+		pin-rts = <GPIO_PIN_NONE>;
+	};
 };