[RFC v2 2/7] arm64: Add definitions for fwnode_handle

[Sameer Goel <sgoel@codeaurora.org>]

This will be used as a device property to match the DMA capable devices
with the associated SMMU. The header file is a port from linux. The code
was changed to remove the types that were not needed for Xen.

Linux ChangeId:ce793486e23e: driver core / ACPI: Represent ACPI
companions using fwnode_handle

Signed-off-by: Sameer Goel <sgoel@codeaurora.org>
---
 xen/include/asm-arm/device.h |  2 ++
 xen/include/xen/fwnode.h     | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 35 insertions(+)
 create mode 100644 xen/include/xen/fwnode.h

diff --git a/xen/include/asm-arm/device.h b/xen/include/asm-arm/device.h
index 6734ae8..78c38fe 100644
--- a/xen/include/asm-arm/device.h
+++ b/xen/include/asm-arm/device.h
@@ -2,6 +2,7 @@
 #define __ASM_ARM_DEVICE_H
 
 #include <xen/init.h>
+#include <xen/fwnode.h>
 
 enum device_type
 {
@@ -19,6 +20,7 @@ struct device
 #ifdef CONFIG_HAS_DEVICE_TREE
     struct dt_device_node *of_node; /* Used by drivers imported from Linux */
 #endif
+    struct fwnode_handle *fwnode; /*fw device node identifier */
     struct dev_archdata archdata;
 };
 
diff --git a/xen/include/xen/fwnode.h b/xen/include/xen/fwnode.h
new file mode 100644
index 0000000..0fed958
--- /dev/null
+++ b/xen/include/xen/fwnode.h
@@ -0,0 +1,33 @@
+/*
+ * fwnode.h - Firmware device node object handle type definition.
+ *
+ * Copyright (C) 2015, Intel Corporation
+ * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * Ported from Linux include/linux/fwnode.h
+ *  => commit ce793486e23e0162a732c605189c8028e0910e86
+ *
+ * No functional Xen modifications.
+ */
+
+#ifndef __XEN_FWNODE_H_
+#define __XEN_FWNODE_H_
+
+enum fwnode_type {
+	FWNODE_INVALID = 0,
+	FWNODE_OF,
+	FWNODE_ACPI,
+	FWNODE_ACPI_STATIC,
+	FWNODE_IRQCHIP
+};
+
+struct fwnode_handle {
+	enum fwnode_type type;
+	struct fwnode_handle *secondary;
+};
+
+#endif
-- 
Qualcomm Datacenter Technologies as an affiliate of Qualcomm Technologies, Inc. Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.


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