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Commit 079a4601 authored by Andrew Bresticker's avatar Andrew Bresticker Committed by Ralf Baechle
Browse files

MIPS: i8259: Use IRQ domains 



Create a legacy IRQ domain for the 16 i8259 interrupts.

Signed-off-by: default avatarAndrew Bresticker <abrestic@chromium.org>
Reviewed-by: default avatarQais Yousef <qais.yousef@imgtec.com>
Tested-by: default avatarQais Yousef <qais.yousef@imgtec.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Jason Cooper <jason@lakedaemon.net>
Cc: Andrew Bresticker <abrestic@chromium.org>
Cc: Jeffrey Deans <jeffrey.deans@imgtec.com>
Cc: Markos Chandras <markos.chandras@imgtec.com>
Cc: Paul Burton <paul.burton@imgtec.com>
Cc: Qais Yousef <qais.yousef@imgtec.com>
Cc: Jonas Gorski <jogo@openwrt.org>
Cc: John Crispin <blogic@openwrt.org>
Cc: David Daney <ddaney.cavm@gmail.com>
Cc: linux-mips@linux-mips.org
Cc: linux-kernel@vger.kernel.org
Patchwork: https://patchwork.linux-mips.org/patch/7804/


Signed-off-by: default avatarRalf Baechle <ralf@linux-mips.org>
parent f64e55dc

arch/mips/Kconfig

+1 −0
Original line number Diff line number Diff line
@@ -975,6 +975,7 @@ config SYS_SUPPORTS_HOTPLUG_CPU 


config I8259

	bool

	select IRQ_DOMAIN



config MIPS_BONITO64

	bool

arch/mips/kernel/i8259.c

+19 −5
Original line number Diff line number Diff line
@@ -12,6 +12,7 @@ 
#include <linux/init.h>

#include <linux/ioport.h>

#include <linux/interrupt.h>

#include <linux/irqdomain.h>

#include <linux/kernel.h>

#include <linux/spinlock.h>

#include <linux/syscore_ops.h>
@@ -308,6 +309,19 @@ static struct resource pic2_io_resource = { 
	.flags = IORESOURCE_BUSY

};



static int i8259A_irq_domain_map(struct irq_domain *d, unsigned int virq,

				 irq_hw_number_t hw)

{

	irq_set_chip_and_handler(virq, &i8259A_chip, handle_level_irq);

	irq_set_probe(virq);

	return 0;

}



static struct irq_domain_ops i8259A_ops = {

	.map = i8259A_irq_domain_map,

	.xlate = irq_domain_xlate_onecell,

};



/*

 * On systems with i8259-style interrupt controllers we assume for

 * driver compatibility reasons interrupts 0 - 15 to be the i8259
@@ -315,17 +329,17 @@ static struct resource pic2_io_resource = { 
 */

void __init init_i8259_irqs(void)

{

	int i;

	struct irq_domain *domain;



	insert_resource(&ioport_resource, &pic1_io_resource);

	insert_resource(&ioport_resource, &pic2_io_resource);



	init_8259A(0);



	for (i = I8259A_IRQ_BASE; i < I8259A_IRQ_BASE + 16; i++) {

		irq_set_chip_and_handler(i, &i8259A_chip, handle_level_irq);

		irq_set_probe(i);

	}

	domain = irq_domain_add_legacy(NULL, 16, I8259A_IRQ_BASE, 0,

				       &i8259A_ops, NULL);

	if (!domain)

		panic("Failed to add i8259 IRQ domain");



	setup_irq(I8259A_IRQ_BASE + PIC_CASCADE_IR, &irq2);

}