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-tlora-pager/Source/Configuration.cpp

@@ -3,6 +3,7 @@
 #include "devices/TpagerEncoder.h"
 #include "devices/TpagerKeyboard.h"
 #include "devices/TpagerPower.h"
+#include <driver/gpio.h>
 
 #include <Tactility/hal/Configuration.h>
 #include <Tactility/lvgl/LvglSync.h>
@@ -60,28 +61,5 @@ extern const Configuration hardwareConfiguration = {
         .initMode = spi::InitMode::ByTactility,
         .isMutable = false,
         .lock = tt::lvgl::getSyncLock() // esp_lvgl_port owns the lock for the display
-    }},
-    .uart {uart::Configuration {
-        .name = "Internal",
-        .port = UART_NUM_1,
-        .rxPin = GPIO_NUM_4,
-        .txPin = GPIO_NUM_12,
-        .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-tlora-pager/Source/Init.cpp

@@ -41,7 +41,7 @@ bool tpagerInit() {
             gps_service->getGpsConfigurations(gps_configurations);
             if (gps_configurations.empty()) {
                 if (gps_service->addGpsConfiguration(tt::hal::gps::GpsConfiguration {
-                    .uartName = "Internal",
+                    .uartName = "uart0",
                     .baudRate = 38400,
                     .model = tt::hal::gps::GpsModel::UBLOX10
                 })) {

Devices/lilygo-tlora-pager/lilygo,tlora-pager.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/LoRa_GPS/T-LoraPager/T-LoraPager.html#Pin-Overview
 / {
@@ -34,4 +35,22 @@
 		pin-data-in = <17>;
 		pin-mclk = <10>;
 	};
+
+	uart_internal: uart0 {
+		compatible = "espressif,esp32-uart";
+		port = <UART_NUM_0>;
+		pin-tx = <12>;
+		pin-rx = <4>;
+		pin-cts = <GPIO_PIN_NONE>;
+		pin-rts = <GPIO_PIN_NONE>;
+	};
+
+	uart_external: 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>;
+	};
 };