forked from Minki/linux
a1d0d98daf
Add a platform for the Wire Speed Processor, based on the PPC A2. This includes code for the ICS & OPB interrupt controllers, as well as a SCOM backend, and SCOM based cpu bringup. Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: David Gibson <david@gibson.dropbear.id.au> Signed-off-by: Jack Miller <jack@codezen.org> Signed-off-by: Ian Munsie <imunsie@au1.ibm.com> Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
37 lines
862 B
C
37 lines
862 B
C
/*
|
|
* 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;
|
|
}
|