--- linux-2.4.30/arch/i386/kernel/pci-irq.c	2005-04-04 03:42:19.000000000 +0200
+++ linux/arch/i386/kernel/pci-irq.c	2005-04-25 08:43:02.501678464 +0200
@@ -157,6 +157,25 @@
 }
 
 /*
+ * PicoPower PT86C523
+ */
+
+static int pirq_pico_get(struct pci_dev *router, struct pci_dev *dev, int pirq)
+{
+  outb(0x10+((pirq-1)>>1), 0x24);
+  return ((pirq-1)&1) ? (inb(0x26)>>4) : (inb(0x26)&0xf);
+}
+
+static int pirq_pico_set(struct pci_dev *router, struct pci_dev *dev, int pirq, int irq) 
+{ 
+  outb(0x10+((pirq-1)>>1), 0x24);
+  unsigned int x;
+  x = inb(0x26); 
+  x = ((pirq-1)&1) ? ((x&0x0f)|(irq<<4)) : ((x&0xf0)|(irq)); 
+  outb(x,0x26); 
+} 
+
+/*
  * ALI pirq entries are damn ugly, and completely undocumented.
  * This has been figured out from pirq tables, and it's not a pretty
  * picture.
@@ -609,6 +628,23 @@
 
 #endif
 
+static __init int pico_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
+{
+  switch(device)
+  {
+    case 0x0002:
+      r->name = "PicoPower PT86C523";
+      r->get = pirq_pico_get;
+      r->set = pirq_pico_set;
+      return 1;
+
+    case 0x8002:
+      r->name = "PicoPower PT86C523 rev. BB+";
+      r->get = pirq_pico_get;
+      r->set = pirq_pico_set;
+      return 1;
+  }
+}
 
 static __init int intel_router_probe(struct irq_router *r, struct pci_dev *router, u16 device)
 {
@@ -814,6 +850,7 @@
 }
 		
 static __initdata struct irq_router_handler pirq_routers[] = {
+        { 0x1066, pico_router_probe },
 	{ PCI_VENDOR_ID_INTEL, intel_router_probe },
 	{ PCI_VENDOR_ID_AL, ali_router_probe },
 	{ PCI_VENDOR_ID_ITE, ite_router_probe },