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authorChristian Krafft <krafft@de.ibm.com>2007-08-30 01:33:53 +0200
committerArnd Bergmann <arnd@klappe.arndb.de>2007-08-30 01:35:05 +0200
commitaac2e68481681a362ab6f44fc515034e2a4c7f2c (patch)
tree3e39ff56bb079c2af1b85a5f7ed990b6dcdb59c3 /arch
parent5cc44e086d7a4e20035997ec612678ca91f426e7 (diff)
downloadop-kernel-dev-aac2e68481681a362ab6f44fc515034e2a4c7f2c.zip
op-kernel-dev-aac2e68481681a362ab6f44fc515034e2a4c7f2c.tar.gz
[POWERPC] spu_manage: fix spu_unit_number for celleb device tree
This fixes a regression introduced with 2.6.23-rc4 after on some confusion about the device tree interfaces. IBM QS21 device trees provide "physical-id", so we changed the code to run on that and remain compatible with all IBM machines. However, the Toshiba Celleb device tree provides the "unit-id" property, which was in the Linux code, but never used in this way on IBM hardware. Legacy device tree used the reg property for the physical id of an spe. This patch fixes find_spu_unit_number to look for the spu id in that order. The length is checked to avoid misinterpretation in case the attributes unit-id or reg do not contain the id. Signed-off-by: Christian Krafft <krafft@de.ibm.com> Signed-off-by: Arnd Bergmann <arnd.bergmann@de.ibm.com> Cc: Jeremy Kerr <jk@ozlabs.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/platforms/cell/spu_manage.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/arch/powerpc/platforms/cell/spu_manage.c b/arch/powerpc/platforms/cell/spu_manage.c
index 7c0668a..0e14f53 100644
--- a/arch/powerpc/platforms/cell/spu_manage.c
+++ b/arch/powerpc/platforms/cell/spu_manage.c
@@ -48,10 +48,18 @@ static u64 __init find_spu_unit_number(struct device_node *spe)
{
const unsigned int *prop;
int proplen;
+
+ /* new device trees should provide the physical-id attribute */
prop = of_get_property(spe, "physical-id", &proplen);
if (proplen == 4)
return (u64)*prop;
+ /* celleb device tree provides the unit-id */
+ prop = of_get_property(spe, "unit-id", &proplen);
+ if (proplen == 4)
+ return (u64)*prop;
+
+ /* legacy device trees provide the id in the reg attribute */
prop = of_get_property(spe, "reg", &proplen);
if (proplen == 4)
return (u64)*prop;
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