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Tip revision: def9d2780727cec3313ed3522d0123158d87224d authored by Linus Torvalds on 20 January 2020, 00:02:49 UTC
Linux 5.5-rc7
Linux 5.5-rc7
Tip revision: def9d27
gtwx5715-pci.c
// SPDX-License-Identifier: GPL-2.0-or-later
/*
* arch/arm/mach-ixp4xx/gtwx5715-pci.c
*
* Gemtek GTWX5715 (Linksys WRV54G) board setup
*
* Copyright (C) 2004 George T. Joseph
* Derived from Coyote
*/
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/irq.h>
#include <asm/mach-types.h>
#include <mach/hardware.h>
#include <asm/mach/pci.h>
#include "irqs.h"
#define SLOT0_DEVID 0
#define SLOT1_DEVID 1
#define INTA 10 /* slot 1 has INTA and INTB crossed */
#define INTB 11
/*
* Slot 0 isn't actually populated with a card connector but
* we initialize it anyway in case a future version has the
* slot populated or someone with good soldering skills has
* some free time.
*/
void __init gtwx5715_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);
ixp4xx_pci_preinit();
}
static int __init gtwx5715_map_irq(const struct pci_dev *dev, u8 slot, u8 pin)
{
int rc = -1;
if ((slot == SLOT0_DEVID && pin == 1) ||
(slot == SLOT1_DEVID && pin == 2))
rc = IXP4XX_GPIO_IRQ(INTA);
else if ((slot == SLOT0_DEVID && pin == 2) ||
(slot == SLOT1_DEVID && pin == 1))
rc = IXP4XX_GPIO_IRQ(INTB);
printk(KERN_INFO "%s: Mapped slot %d pin %d to IRQ %d\n",
__func__, slot, pin, rc);
return rc;
}
struct hw_pci gtwx5715_pci __initdata = {
.nr_controllers = 1,
.ops = &ixp4xx_ops,
.preinit = gtwx5715_pci_preinit,
.setup = ixp4xx_setup,
.map_irq = gtwx5715_map_irq,
};
int __init gtwx5715_pci_init(void)
{
if (machine_is_gtwx5715())
pci_common_init(>wx5715_pci);
return 0;
}
subsys_initcall(gtwx5715_pci_init);