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-rw-r--r--arch/ppc64/kernel/prom_init.c50
1 files changed, 49 insertions, 1 deletions
diff --git a/arch/ppc64/kernel/prom_init.c b/arch/ppc64/kernel/prom_init.c
index 35ec42de962e..bc53967a8643 100644
--- a/arch/ppc64/kernel/prom_init.c
+++ b/arch/ppc64/kernel/prom_init.c
@@ -1750,7 +1750,44 @@ static void __init flatten_device_tree(void)
prom_printf("Device tree struct 0x%x -> 0x%x\n",
RELOC(dt_struct_start), RELOC(dt_struct_end));
- }
+}
+
+
+static void __init fixup_device_tree(void)
+{
+ unsigned long offset = reloc_offset();
+ phandle u3, i2c, mpic;
+ u32 u3_rev;
+ u32 interrupts[2];
+ u32 parent;
+
+ /* Some G5s have a missing interrupt definition, fix it up here */
+ u3 = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000"));
+ if ((long)u3 <= 0)
+ return;
+ i2c = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/i2c@f8001000"));
+ if ((long)i2c <= 0)
+ return;
+ mpic = call_prom("finddevice", 1, 1, ADDR("/u3@0,f8000000/mpic@f8040000"));
+ if ((long)mpic <= 0)
+ return;
+
+ /* check if proper rev of u3 */
+ if (prom_getprop(u3, "device-rev", &u3_rev, sizeof(u3_rev)) <= 0)
+ return;
+ if (u3_rev != 0x35)
+ return;
+ /* does it need fixup ? */
+ if (prom_getproplen(i2c, "interrupts") > 0)
+ return;
+ /* interrupt on this revision of u3 is number 0 and level */
+ interrupts[0] = 0;
+ interrupts[1] = 1;
+ prom_setprop(i2c, "interrupts", &interrupts, sizeof(interrupts));
+ parent = (u32)mpic;
+ prom_setprop(i2c, "interrupt-parent", &parent, sizeof(parent));
+}
+
static void __init prom_find_boot_cpu(void)
{
@@ -1844,6 +1881,12 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, unsigned long
&getprop_rval, sizeof(getprop_rval));
/*
+ * On pSeries, inform the firmware about our capabilities
+ */
+ if (RELOC(of_platform) & PLATFORM_PSERIES)
+ prom_send_capabilities();
+
+ /*
* On pSeries, copy the CPU hold code
*/
if (RELOC(of_platform) & PLATFORM_PSERIES)
@@ -1920,6 +1963,11 @@ unsigned long __init prom_init(unsigned long r3, unsigned long r4, unsigned long
}
/*
+ * Fixup any known bugs in the device-tree
+ */
+ fixup_device_tree();
+
+ /*
* Now finally create the flattened device-tree
*/
prom_printf("copying OF device tree ...\n");