cregit-Linux how code gets into the kernel

Release 4.17 arch/arm/mach-ixp4xx/miccpt-pci.c

/*
 * arch/arm/mach-ixp4xx/miccpt-pci.c
 *
 * MICCPT board-level PCI initialization
 *
 * Copyright (C) 2002 Intel Corporation.
 * Copyright (C) 2003-2004 MontaVista Software, Inc.
 * Copyright (C) 2006 OMICRON electronics GmbH
 *
 * Author: Michael Jochum <michael.jochum@omicron.at>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 *
 */

#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <asm/mach/pci.h>
#include <asm/irq.h>
#include <mach/hardware.h>
#include <asm/mach-types.h>


#define MAX_DEV		4

#define IRQ_LINES	4

/* PCI controller GPIO to IRQ pin mappings */

#define INTA		1

#define INTB		2

#define INTC		3

#define INTD		4



void __init miccpt_pci_preinit(void) { irq_set_irq_type(IXP4XX_GPIO_IRQ(INTA), IRQ_TYPE_LEVEL_LOW); irq_set_irq_type(IXP4XX_GPIO_IRQ(INTB), IRQ_TYPE_LEVEL_LOW); irq_set_irq_type(IXP4XX_GPIO_IRQ(INTC), IRQ_TYPE_LEVEL_LOW); irq_set_irq_type(IXP4XX_GPIO_IRQ(INTD), IRQ_TYPE_LEVEL_LOW); ixp4xx_pci_preinit(); }

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Richard Cochran51100.00%1100.00%
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static int __init miccpt_map_irq(const struct pci_dev *dev, u8 slot, u8 pin) { static int pci_irq_table[IRQ_LINES] = { IXP4XX_GPIO_IRQ(INTA), IXP4XX_GPIO_IRQ(INTB), IXP4XX_GPIO_IRQ(INTC), IXP4XX_GPIO_IRQ(INTD) }; if (slot >= 1 && slot <= MAX_DEV && pin >= 1 && pin <= IRQ_LINES) return pci_irq_table[(slot + pin - 2) % 4]; return -1; }

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Richard Cochran84100.00%1100.00%
Total84100.00%1100.00%

struct hw_pci miccpt_pci __initdata = { .nr_controllers = 1, .ops = &ixp4xx_ops, .preinit = miccpt_pci_preinit, .setup = ixp4xx_setup, .map_irq = miccpt_map_irq, };
int __init miccpt_pci_init(void) { if (machine_is_miccpt()) pci_common_init(&miccpt_pci); return 0; }

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Richard Cochran22100.00%1100.00%
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subsys_initcall(miccpt_pci_init);

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Richard Cochran24297.58%150.00%
Russell King62.42%150.00%
Total248100.00%2100.00%
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