linux/arch/mn10300/unit-asb2305/pci-irq.c
Hanjun Guo a43ae58c84 PCI: Turn pcibios_penalize_isa_irq() into a weak function
pcibios_penalize_isa_irq() is only implemented by x86 now, and legacy ISA
is not used by some architectures.  Make pcibios_penalize_isa_irq() a
__weak function to simplify the code.  This removes the need for new
platforms to add stub implementations of pcibios_penalize_isa_irq().

[bhelgaas: changelog, comments]
Signed-off-by: Hanjun Guo <hanjun.guo@linaro.org>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Acked-by: Arnd Bergmann <arnd@arndb.de>
2014-05-27 16:23:58 -06:00

47 lines
1.2 KiB
C

/* PCI IRQ routing on the MN103E010 based ASB2305
*
* Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
* Written by David Howells (dhowells@redhat.com)
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public Licence
* as published by the Free Software Foundation; either version
* 2 of the Licence, or (at your option) any later version.
*
* This is simple: All PCI interrupts route through the CPU's XIRQ1 pin [IRQ 35]
*/
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <asm/io.h>
#include <asm/smp.h>
#include "pci-asb2305.h"
void __init pcibios_irq_init(void)
{
}
void __init pcibios_fixup_irqs(void)
{
struct pci_dev *dev = NULL;
u8 line, pin;
for_each_pci_dev(dev) {
pci_read_config_byte(dev, PCI_INTERRUPT_PIN, &pin);
if (pin) {
dev->irq = XIRQ1;
pci_write_config_byte(dev, PCI_INTERRUPT_LINE,
dev->irq);
}
pci_read_config_byte(dev, PCI_INTERRUPT_LINE, &line);
}
}
void pcibios_enable_irq(struct pci_dev *dev)
{
pci_write_config_byte(dev, PCI_INTERRUPT_LINE, dev->irq);
}