[PATCH] Connecting the SB600's i8259 controller rather in pasemi's pci.c than in pasemi's setup.c.

[Christian Zigotzky]

 "pas_pci_init" was before "nemo_init_IRQ".
 Now "pas_pci_init" is after "nemo_init_IRQ" in the official kernel source
 code.
 I think "pas_pci_init" scans (discovers) the PCI(e) devices
 and after that, "nemo_init_IRQ" assigns interrupt numbers
 to these devices if required.
 It's not possible to assigns interrupt numbers to PCI(e) devices
 which have not been discovered yet.

Signed-off-by: Christian Zigotzky <chzigotzky@xxxxxxxxxxx>
---
 arch/powerpc/platforms/pasemi/pci.c   | 7 +++++++
 arch/powerpc/platforms/pasemi/setup.c | 7 ++++---
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/arch/powerpc/platforms/pasemi/pci.c b/arch/powerpc/platforms/pasemi/pci.c
index 2df955274652..7208c325bfc5 100644
--- a/arch/powerpc/platforms/pasemi/pci.c
+++ b/arch/powerpc/platforms/pasemi/pci.c
@@ -25,6 +25,8 @@
 
 #define PA_PXP_CFA(bus, devfn, off) (((bus) << 20) | ((devfn) << 12) | (off))
 
+extern void nemo_init_IRQ(void);
+
 static inline int pa_pxp_offset_valid(u8 bus, u8 devfn, int offset)
 {
 	/* Device 0 Function 0 is special: It's config space spans function 1 as
@@ -265,6 +267,11 @@ static int __init pas_add_bridge(struct device_node *dev)
 	 */
 	isa_bridge_find_early(hose);
 
+	/*
+	 * ISA bridge is now active, add the i8259 cascade (if needed)
+	 */
+	nemo_init_IRQ();
+
 	return 0;
 }
 
diff --git a/arch/powerpc/platforms/pasemi/setup.c b/arch/powerpc/platforms/pasemi/setup.c
index d03b41336901..eec74611be46 100644
--- a/arch/powerpc/platforms/pasemi/setup.c
+++ b/arch/powerpc/platforms/pasemi/setup.c
@@ -214,10 +214,12 @@ static void sb600_8259_cascade(struct irq_desc *desc)
 	chip->irq_eoi(&desc->irq_data);
 }
 
-static void __init nemo_init_IRQ(struct mpic *mpic)
+void 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);
@@ -228,6 +230,7 @@ static void __init nemo_init_IRQ(struct mpic *mpic)
 	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);
 }
 
@@ -298,8 +301,6 @@ 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);
 }
-- 
2.55.0.windows.1