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authorSrikant Patnaik2015-01-11 12:28:04 +0530
committerSrikant Patnaik2015-01-11 12:28:04 +0530
commit871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch)
tree8718f573808810c2a1e8cb8fb6ac469093ca2784 /arch/powerpc/platforms/wsp/setup.c
parent9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff)
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Moved, renamed, and deleted files
The original directory structure was scattered and unorganized. Changes are basically to make it look like kernel structure.
Diffstat (limited to 'arch/powerpc/platforms/wsp/setup.c')
-rw-r--r--arch/powerpc/platforms/wsp/setup.c36
1 files changed, 36 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/wsp/setup.c b/arch/powerpc/platforms/wsp/setup.c
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--- /dev/null
+++ b/arch/powerpc/platforms/wsp/setup.c
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+/*
+ * Copyright 2010 Michael Ellerman, IBM Corporation
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version
+ * 2 of the License, or (at your option) any later version.
+ */
+
+#include <linux/kernel.h>
+#include <linux/of_platform.h>
+
+#include "wsp.h"
+
+/*
+ * Find chip-id by walking up device tree looking for ibm,wsp-chip-id property.
+ * Won't work for nodes that are not a descendant of a wsp node.
+ */
+int wsp_get_chip_id(struct device_node *dn)
+{
+ const u32 *p;
+ int rc;
+
+ /* Start looking at the specified node, not its parent */
+ dn = of_node_get(dn);
+ while (dn && !(p = of_get_property(dn, "ibm,wsp-chip-id", NULL)))
+ dn = of_get_next_parent(dn);
+
+ if (!dn)
+ return -1;
+
+ rc = *p;
+ of_node_put(dn);
+
+ return rc;
+}