Merge branch 'upstream' into concedo_experimental

# Conflicts:
#	.github/workflows/ui-publish.yml
#	CODEOWNERS
#	docs/ops.md
#	ggml/CMakeLists.txt
#	ggml/src/CMakeLists.txt
#	ggml/src/ggml-hexagon/htp/CMakeLists.txt
#	ggml/src/ggml-hexagon/htp/argsort-ops.c
#	scripts/sync-ggml.last
#	tools/mtmd/tests/test-deepseek-ocr.py

ggml/include/ggml-et.h

@@ -0,0 +1,28 @@
+#pragma once
+
+#include "ggml.h"
+#include "ggml-backend.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define GGML_ET_NAME "ET"
+
+// backend API
+GGML_BACKEND_API ggml_guid_t     ggml_backend_et_guid(void);
+GGML_BACKEND_API ggml_backend_t ggml_backend_et_init(size_t devidx);
+
+GGML_BACKEND_API bool ggml_backend_is_et(ggml_backend_t backend);
+GGML_BACKEND_API int  ggml_backend_et_get_device_count(void);
+GGML_BACKEND_API void ggml_backend_et_get_device_description(int devidx, char * description, size_t description_size);
+GGML_BACKEND_API void ggml_backend_et_get_device_memory(int devidx, size_t * free, size_t * total);
+
+GGML_BACKEND_API ggml_backend_buffer_type_t ggml_backend_et_buffer_type(size_t dev_num);
+GGML_BACKEND_API ggml_backend_buffer_type_t ggml_backend_et_host_buffer_type(void);
+
+GGML_BACKEND_API ggml_backend_reg_t ggml_backend_et_reg(void);
+
+#ifdef  __cplusplus
+}
+#endif