New kernel drivers and device migrations (#563)

TactilityKernel/include/tactility/bindings/gpio_hog.h

@@ -0,0 +1,7 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <tactility/bindings/bindings.h>
+#include <tactility/drivers/gpio_hog.h>
+
+DEFINE_DEVICETREE(gpio_hog, struct GpioHogConfig)

TactilityKernel/include/tactility/device_listener.h

@@ -22,9 +22,9 @@ struct DeviceEventListener {
     void* callback_context;
 };
 
-void device_listener_add(DeviceListenerCallback* callback, void* context);
+void device_listener_add(DeviceListenerCallback callback, void* context);
 
-void device_listener_remove(DeviceListenerCallback* callback);
+void device_listener_remove(DeviceListenerCallback callback);
 
 #ifdef __cplusplus
 }

TactilityKernel/include/tactility/drivers/gpio_hog.h

@@ -0,0 +1,23 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#include <tactility/drivers/gpio.h>
+
+enum GpioHogMode {
+    GPIO_HOG_MODE_OUTPUT_HIGH,
+    GPIO_HOG_MODE_OUTPUT_LOW,
+    GPIO_HOG_MODE_INPUT,
+};
+
+struct GpioHogConfig {
+    struct GpioPinSpec pin;
+    enum GpioHogMode mode;
+};
+
+#ifdef __cplusplus
+}
+#endif

TactilityKernel/include/tactility/drivers/i8080_controller.h

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: Apache-2.0
+
+#pragma once
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief Generic device type for i8080 (8080-series parallel) LCD bus controllers.
+ *
+ * Unlike SPI_CONTROLLER_TYPE, there is no locking API: an i80 bus only ever has one
+ * consumer (a single display panel) in every known board, so no arbitration is needed.
+ */
+extern const struct DeviceType I8080_CONTROLLER_TYPE;
+
+#ifdef __cplusplus
+}
+#endif