powerpc/pasemi: Add Nemo board IRQ initroutine

Add a IRQ init routine for the Nemo board which inits and attatches
the i8259 found in the SB600, and a cascade routine to dispatch the
interrupts.
Signed-off-by: Darren Stevens <darren@stevens-zone.net>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/platforms/pasemi/pci.c

@@ -27,6 +27,7 @@
 #include <linux/pci.h>
 
 #include <asm/pci-bridge.h>
+#include <asm/isa-bridge.h>
 #include <asm/machdep.h>
 
 #include <asm/ppc-pci.h>
@@ -181,6 +182,8 @@ static int pa_pxp_read_config(struct pci_bus *bus, unsigned int devfn,
 
 	addr = pa_pxp_cfg_addr(hose, bus->number, devfn, offset);
 
+	sb600_set_flag(bus->number);
+
 	/*
 	 * Note: the caller has already checked that offset is
 	 * suitably aligned and that len is 1, 2 or 4.
@@ -215,6 +218,8 @@ static int pa_pxp_write_config(struct pci_bus *bus, unsigned int devfn,
 
 	addr = pa_pxp_cfg_addr(hose, bus->number, devfn, offset);
 
+	sb600_set_flag(bus->number);
+
 	/*
 	 * Note: the caller has already checked that offset is
 	 * suitably aligned and that len is 1, 2 or 4.
@@ -265,6 +270,12 @@ static int __init pas_add_bridge(struct device_node *dev)
 	/* Interpret the "ranges" property */
 	pci_process_bridge_OF_ranges(hose, dev, 1);
 
+	/*
+	 * Scan for an isa bridge. This is needed to find the SB600 on the nemo
+	 * and does nothing on machines without one.
+	 */
+	isa_bridge_find_early(hose);
+
 	return 0;
 }
 

arch/powerpc/platforms/pasemi/setup.c

@@ -314,6 +314,8 @@ 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);
 }
@@ -475,6 +477,8 @@ static int __init pasemi_publish_devices(void)
 	/* Publish OF platform devices for SDC and other non-PCI devices */
 	of_platform_bus_probe(NULL, pasemi_bus_ids, NULL);
 
+	nemo_init_rtc();
+
 	return 0;
 }
 machine_device_initcall(pasemi, pasemi_publish_devices);
@@ -489,6 +493,17 @@ static int __init pas_probe(void)
 	    !of_machine_is_compatible("pasemi,pwrficient"))
 		return 0;
 
+#ifdef CONFIG_PPC_PASEMI_NEMO
+	/*
+	 * Check for the Nemo motherboard here, if we are running on one
+	 * change the machine definition to fit
+	 */
+	if (of_machine_is_compatible("pasemi,nemo")) {
+		pm_power_off		= pas_shutdown;
+		ppc_md.name		= "A-EON Amigaone X1000";
+	}
+#endif
+
 	iommu_init_early_pasemi();
 
 	return 1;