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[CELL] allow linux to map Cell regs on legacy SLOF tree.

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The platforms missing the "cpus" property in the "be" node are mono-Cell
platforms such as CAB or Getaway.

Therefore it is possible to assume that if there is no "cpus" properties
under the "be" node then we can safely return the "device node" without
more checking. This is a bit hacky but ... it allows it to work on
these platforms.

Signed-off-by: Jean-Christophe DUBOIS <jcd@tribudubois.net>
Acked-by: Christian Krafft <krafft@de.ibm.com>
Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com>
This commit is contained in:
Jean-Christophe DUBOIS 2007-07-20 21:39:25 +02:00 committed by Arnd Bergmann
parent 827e3648dc
commit b86ce01c77
1 changed files with 7 additions and 0 deletions
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7
arch/powerpc/platforms/cell/cbe_regs.c
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@ -174,6 +174,13 @@ static struct device_node *cbe_get_be_node(int cpu_id)
cpu_handle = of_get_property(np, "cpus", &len);
/*
* the CAB SLOF tree is non compliant, so we just assume
* there is only one node
*/
if (WARN_ON_ONCE(!cpu_handle))
return np;
for (i=0; i<len; i++)
if (of_find_node_by_phandle(cpu_handle[i]) == of_get_cpu_node(cpu_id, NULL))
return np;