Greg Kroah-Hartman
598cf27219
Link: https://lore.kernel.org/r/20260217200002.683975158@linuxfoundation.org Tested-by: Florian Fainelli <florian.fainelli@broadcom.com> Tested-by: Takeshi Ogasawara <takeshi.ogasawara@futuring-girl.com> Tested-by: Peter Schneider <pschneider1968@googlemail.com> Tested-by: Jon Hunter <jonathanh@nvidia.com> Tested-by: Salvatore Bonaccorso <carnil@debian.org> Tested-by: Brett A C Sheffield <bacs@librecast.net> Tested-by: Mark Brown <broonie@kernel.org> Tested-by: Luna Jernberg <droidbittin@gmail.com> Tested-by: Ronald Warsow <rwarsow@gmx.de> Tested-by: Justin M. Forbes <jforbes@fedoraproject.org> Tested-by: Ron Economos <re@w6rz.net> Tested-by: Miguel Ojeda <ojeda@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
70 lines
1.4 KiB
C
70 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.h>
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#include <linux/of_irq.h>
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#include <asm/mpic.h>
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#include <asm/i8259.h>
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#include "mpc86xx.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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