New kernel drivers and device migrations (#563)

Drivers/tca95xx-16bit-module/include/bindings/tca95xx.h

@@ -0,0 +1,21 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <tactility/bindings/bindings.h>
+#include <drivers/tca95xx.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// One DEFINE_DEVICETREE per compatible string -- the devicetree compiler derives the
+// expected config typedef name from the compatible string's suffix (e.g. "ti,tca9535"
+// -> tca9535_config_dt), not from a name we choose, so each supported chip needs its own
+// typedef even though they share the same underlying config layout (see dummy-i2s-amp-module's
+// bindings header for the same pattern).
+DEFINE_DEVICETREE(tca9535, struct Tca95xxConfig)
+DEFINE_DEVICETREE(tca9539, struct Tca95xxConfig)
+
+#ifdef __cplusplus
+}
+#endif

Drivers/tca95xx-16bit-module/include/drivers/tca95xx.h

@@ -0,0 +1,17 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <stdint.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+struct Tca95xxConfig {
+    /** Address on bus */
+    uint8_t address;
+};
+
+#ifdef __cplusplus
+}
+#endif

Drivers/tca95xx-16bit-module/include/tca95xx_module.h

@@ -0,0 +1,16 @@
+// SPDX-License-Identifier: Apache-2.0
+#pragma once
+
+#include <tactility/module.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// The devicetree compiler derives the expected module symbol name from this component's
+// folder name ("tca95xx-16bit-module" -> tca95xx_16bit_module), not from a name we choose.
+extern struct Module tca95xx_16bit_module;
+
+#ifdef __cplusplus
+}
+#endif