Commit 0428a5f4 authored by Darren Stevens's avatar Darren Stevens Committed by Michael Ellerman
Browse files

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: default avatarDarren Stevens <darren@stevens-zone.net>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 68f211a4

arch/powerpc/platforms/pasemi/setup.c

+37 −0
Original line number Diff line number Diff line
@@ -34,6 +34,7 @@ 
#include <asm/prom.h>

#include <asm/iommu.h>

#include <asm/machdep.h>

#include <asm/i8259.h>

#include <asm/mpic.h>

#include <asm/smp.h>

#include <asm/time.h>
@@ -183,6 +184,42 @@ static int __init pas_setup_mce_regs(void) 
}

machine_device_initcall(pasemi, pas_setup_mce_regs);



#ifdef CONFIG_PPC_PASEMI_NEMO

static void sb600_8259_cascade(struct irq_desc *desc)

{

	struct irq_chip *chip = irq_desc_get_chip(desc);

	unsigned int cascade_irq = i8259_irq();



	if (cascade_irq)

		generic_handle_irq(cascade_irq);



	chip->irq_eoi(&desc->irq_data);

}



static void nemo_init_IRQ(struct mpic *mpic)

{

	struct device_node *np;

	int gpio_virq;

	/* Connect the SB600's legacy i8259 controller */

	np = of_find_node_by_path("/pxp@0,e0000000");

	i8259_init(np, 0);

	of_node_put(np);



	gpio_virq = irq_create_mapping(NULL, 3);

	irq_set_irq_type(gpio_virq, IRQ_TYPE_LEVEL_HIGH);

	irq_set_chained_handler(gpio_virq, sb600_8259_cascade);

	mpic_unmask_irq(irq_get_irq_data(gpio_virq));



	irq_set_default_host(mpic->irqhost);

}



#else



static inline void nemo_init_IRQ(struct mpic *mpic)

{

}

#endif



static __init void pas_init_IRQ(void)

{

	struct device_node *np;

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