diff -rupN a/arch/powerpc/platforms/pasemi/pasemi.h b/arch/powerpc/platforms/pasemi/pasemi.h
--- a/arch/powerpc/platforms/pasemi/pasemi.h	2026-09-13 23:38:02.000000000 +0200
+++ b/arch/powerpc/platforms/pasemi/pasemi.h	2026-09-14 04:40:00.099127791 +0200
@@ -7,6 +7,12 @@ extern void pas_pci_init(void);
 struct pci_dev;
 extern void pas_pci_dma_dev_setup(struct pci_dev *dev);
 
+#ifdef CONFIG_PPC_PASEMI_NEMO
+extern void __init nemo_init_IRQ(void);
+#else
+static inline void __init nemo_init_IRQ(void) { }
+#endif
+
 void __iomem *__init pasemi_pci_getcfgaddr(struct pci_dev *dev, int offset);
 
 extern void __init pasemi_map_registers(void);
diff -rupN a/arch/powerpc/platforms/pasemi/pci.c b/arch/powerpc/platforms/pasemi/pci.c
--- a/arch/powerpc/platforms/pasemi/pci.c	2026-09-13 23:38:02.000000000 +0200
+++ b/arch/powerpc/platforms/pasemi/pci.c	2026-09-14 04:40:00.099424146 +0200
@@ -265,6 +265,11 @@ static int __init pas_add_bridge(struct
 	 */
 	isa_bridge_find_early(hose);
 
+	/*
+	 * ISA bridge is now active, add the i8259 cascade (if needed)
+	 */
+	nemo_init_IRQ();
+
 	return 0;
 }
 
diff -rupN a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
--- a/arch/powerpc/platforms/pasemi/setup.c	2026-09-13 23:38:02.000000000 +0200
+++ b/arch/powerpc/platforms/pasemi/setup.c	2026-09-14 04:40:00.099712078 +0200
@@ -216,10 +216,12 @@ static void sb600_8259_cascade(struct ir
 	chip->irq_eoi(&desc->irq_data);
 }
 
-static void __init nemo_init_IRQ(struct mpic *mpic)
+void __init nemo_init_IRQ(void)
 {
 	struct device_node *np;
 	int gpio_virq;
+	struct mpic *mpic;
+
 	/* Connect the SB600's legacy i8259 controller */
 	np = of_find_node_by_path("/pxp@0,e0000000");
 	i8259_init(np, 0);
@@ -230,14 +232,10 @@ static void __init nemo_init_IRQ(struct
 	irq_set_chained_handler(gpio_virq, sb600_8259_cascade);
 	mpic_unmask_irq(irq_get_irq_data(gpio_virq));
 
+	mpic = irq_get_chip_data(gpio_virq);
 	irq_set_default_domain(mpic->irqhost);
 }
 
-#else
-
-static inline void nemo_init_IRQ(struct mpic *mpic)
-{
-}
 #endif
 
 static __init void pas_init_IRQ(void)
@@ -300,8 +298,6 @@ static __init void pas_init_IRQ(void)
 		mpic_unmask_irq(irq_get_irq_data(nmi_virq));
 	}
 
-	nemo_init_IRQ(mpic);
-
 	of_node_put(mpic_node);
 	of_node_put(root);
 }