ARC: Prepare interrupt code for external controllers (a37cdacc) · Commits · 戴 / test

This patch adds some room for CPU-external interrupt controllers in the Linux interrupt space. Until now, only the 32 CPU internal interrupt lines were supported which does not allow for external interrupt controllers such as GPIO modules etc. Signed-off-by:

Christian Ruppert <christian.ruppert@abilis.com> Signed-off-by:

Pierrick Hascoet <pierrick.hascoet@abilis.com> Signed-off-by:

Vineet Gupta <vgupta@synopsys.com>

arch/arc/include/asm/irq.h

+2 −1

Original line number	Diff line number	Diff line
		@@ -9,7 +9,8 @@
		#ifndef __ASM_ARC_IRQ_H
		#define __ASM_ARC_IRQ_H

		#define NR_IRQS 32
		#define NR_CPU_IRQS 32 /* number of interrupt lines of ARC770 CPU */
		#define NR_IRQS 128 /* allow some CPU external IRQ handling */

		/* Platform Independent IRQs */
		#define TIMER0_IRQ 3

arch/arc/kernel/irq.c

+1 −1

Original line number	Diff line number	Diff line
		@@ -105,7 +105,7 @@ init_onchip_IRQ(struct device_node intc, struct device_node parent)
		if (parent)
		panic("DeviceTree incore intc not a root irq controller\n");

		root_domain = irq_domain_add_legacy(intc, NR_IRQS, 0, 0,
		root_domain = irq_domain_add_legacy(intc, NR_CPU_IRQS, 0, 0,
		&arc_intc_domain_ops, NULL);

		if (!root_domain)

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