acpi: Add an acpi command to list/dump generated ACPI items

Add a command that shows the individual blocks of data generated by each
device, effectively splitting the full table into its component parts.
This can be helpful for debugging.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Wolfgang Wallner <wolfgang.wallner@br-automation.com>
Reviewed-by: Bin Meng <bmeng.cn@gmail.com>

include/dm/acpi.h

@@ -27,6 +27,12 @@
 
 #if !defined(__ACPI__)
 
+/** enum acpi_dump_option - selects what ACPI information to dump */
+enum acpi_dump_option {
+	ACPI_DUMP_LIST,		/* Just the list of items */
+	ACPI_DUMP_CONTENTS,	/* Include the binary contents also */
+};
+
 /**
  * struct acpi_ctx - Context used for writing ACPI tables
  *
@@ -171,6 +177,16 @@ int acpi_fill_ssdt(struct acpi_ctx *ctx);
  */
 int acpi_inject_dsdt(struct acpi_ctx *ctx);
 
+/**
+ * acpi_dump_items() - Dump out the collected ACPI items
+ *
+ * This lists the ACPI DSDT and SSDT items generated by the various U-Boot
+ * drivers.
+ *
+ * @option: Sets what should be dumpyed
+ */
+void acpi_dump_items(enum acpi_dump_option option);
+
 #endif /* __ACPI__ */
 
 #endif