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/guition-jc2432w328c/Source/Configuration.cpp

@@ -1,5 +1,6 @@
 #include "devices/Display.h"
 #include "devices/SdCard.h"
+#include <driver/gpio.h>
 
 #include <PwmBacklight.h>
 #include <Tactility/hal/Configuration.h>
@@ -80,31 +81,5 @@ extern const Configuration hardwareConfiguration = {
             .isMutable = false,
             .lock = nullptr
         }
-    },
-    .uart {
-        //CN1 header, JST SH 1.25, GND / IO22 / IO21 / 3.3V
-        uart::Configuration {
-            .name = "UART1",
-            .port = UART_NUM_1,
-            .rxPin = GPIO_NUM_21,
-            .txPin = GPIO_NUM_22,
-            .rtsPin = GPIO_NUM_NC,
-            .ctsPin = GPIO_NUM_NC,
-            .rxBufferSize = 1024,
-            .txBufferSize = 1024,
-            .config = {
-                .baud_rate = 9600,
-                .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/guition-jc2432w328c/guition,jc2432w328c.dts

@@ -3,6 +3,7 @@
 #include <tactility/bindings/root.h>
 #include <tactility/bindings/esp32_gpio.h>
 #include <tactility/bindings/esp32_i2c.h>
+#include <tactility/bindings/esp32_uart.h>
 
 / {
 	compatible = "root";
@@ -13,7 +14,7 @@
 		gpio-count = <40>;
 	};
 
-	i2c_internal {
+	i2c_internal: i2c0 {
 		compatible = "espressif,esp32-i2c";
 		port = <I2C_NUM_0>;
 		clock-frequency = <400000>;
@@ -21,12 +22,22 @@
 		pin-scl = <32>;
 	};
 
-	/* CN1 header */
-	i2c_external {
+	// CN1 header
+	i2c_external: i2c1 {
 		compatible = "espressif,esp32-i2c";
 		port = <I2C_NUM_1>;
 		clock-frequency = <400000>;
 		pin-sda = <21>;
 		pin-scl = <22>;
 	};
+
+	// CN1 header, JST SH 1.25, GND / IO22 / IO21 / 3.3V
+	uart1 {
+		compatible = "espressif,esp32-uart";
+		port = <UART_NUM_1>;
+		pin-tx = <22>;
+		pin-rx = <21>;
+		pin-cts = <GPIO_PIN_NONE>;
+		pin-rts = <GPIO_PIN_NONE>;
+	};
 };