added drivers

app/drivers/utils/spi_cs/spi_cs_if.h

@@ -0,0 +1,14 @@
+#pragma once
+
+#include "stdint.h"
+
+typedef struct cs_handle_t cs_handle_t;
+
+typedef void (*cs_on_t)(cs_handle_t *hcs);
+typedef void (*cs_off_t)(cs_handle_t *hcs);
+
+struct cs_handle_t
+{
+    cs_on_t cs_on;
+    cs_off_t cs_off;
+};