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2874c5fd28
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
67 lines
1.4 KiB
C
67 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* Copyright 2008 Freescale Semiconductor, Inc.
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*/
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#include <linux/stddef.h>
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#include <linux/kernel.h>
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#include <linux/interrupt.h>
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#include <linux/of_irq.h>
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#include <linux/of_platform.h>
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#include <asm/mpic.h>
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#include <asm/i8259.h>
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#ifdef CONFIG_PPC_I8259
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static void mpc86xx_8259_cascade(struct irq_desc *desc)
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{
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struct irq_chip *chip = irq_desc_get_chip(desc);
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unsigned int cascade_irq = i8259_irq();
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if (cascade_irq)
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generic_handle_irq(cascade_irq);
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chip->irq_eoi(&desc->irq_data);
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}
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#endif /* CONFIG_PPC_I8259 */
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void __init mpc86xx_init_irq(void)
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{
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#ifdef CONFIG_PPC_I8259
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struct device_node *np;
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struct device_node *cascade_node = NULL;
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int cascade_irq;
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#endif
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struct mpic *mpic = mpic_alloc(NULL, 0, MPIC_BIG_ENDIAN |
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MPIC_SINGLE_DEST_CPU,
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0, 256, " MPIC ");
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BUG_ON(mpic == NULL);
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mpic_init(mpic);
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#ifdef CONFIG_PPC_I8259
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/* Initialize i8259 controller */
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for_each_node_by_type(np, "interrupt-controller")
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if (of_device_is_compatible(np, "chrp,iic")) {
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cascade_node = np;
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break;
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}
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if (cascade_node == NULL) {
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printk(KERN_DEBUG "Could not find i8259 PIC\n");
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return;
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}
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cascade_irq = irq_of_parse_and_map(cascade_node, 0);
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if (!cascade_irq) {
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printk(KERN_ERR "Failed to map cascade interrupt\n");
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return;
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}
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i8259_init(cascade_node, 0);
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of_node_put(cascade_node);
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irq_set_chained_handler(cascade_irq, mpc86xx_8259_cascade);
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#endif
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}
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