[ACPI] Bind ACPI and PCI devices
http://bugzilla.kernel.org/show_bug.cgi?id=4277 Signed-off-by: David Shaohua Li <shaohua.li@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
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@ -1,9 +1,10 @@
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/*
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/*
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* File: pci-acpi.c
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* File: pci-acpi.c
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* Purpose: Provide PCI supports in ACPI
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* Purpose: Provide PCI support in ACPI
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*
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*
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* Copyright (C) 2004 Intel
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* Copyright (C) 2005 David Shaohua Li <shaohua.li@intel.com>
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* Copyright (C) Tom Long Nguyen (tom.l.nguyen@intel.com)
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* Copyright (C) 2004 Tom Long Nguyen <tom.l.nguyen@intel.com>
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* Copyright (C) 2004 Intel Corp.
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*/
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*/
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#include <linux/delay.h>
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#include <linux/delay.h>
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@ -207,3 +208,53 @@ acpi_status pci_osc_control_set(u32 flags)
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return status;
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return status;
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}
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}
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EXPORT_SYMBOL(pci_osc_control_set);
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EXPORT_SYMBOL(pci_osc_control_set);
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/* ACPI bus type */
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static int pci_acpi_find_device(struct device *dev, acpi_handle *handle)
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{
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struct pci_dev * pci_dev;
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acpi_integer addr;
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pci_dev = to_pci_dev(dev);
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/* Please ref to ACPI spec for the syntax of _ADR */
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addr = (PCI_SLOT(pci_dev->devfn) << 16) | PCI_FUNC(pci_dev->devfn);
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*handle = acpi_get_child(DEVICE_ACPI_HANDLE(dev->parent), addr);
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if (!*handle)
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return -ENODEV;
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return 0;
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}
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static int pci_acpi_find_root_bridge(struct device *dev, acpi_handle *handle)
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{
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int num;
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unsigned int seg, bus;
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/*
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* The string should be the same as root bridge's name
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* Please look at 'pci_scan_bus_parented'
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*/
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num = sscanf(dev->bus_id, "pci%04x:%02x", &seg, &bus);
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if (num != 2)
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return -ENODEV;
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*handle = acpi_get_pci_rootbridge_handle(seg, bus);
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if (!*handle)
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return -ENODEV;
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return 0;
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}
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static struct acpi_bus_type pci_acpi_bus = {
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.bus = &pci_bus_type,
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.find_device = pci_acpi_find_device,
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.find_bridge = pci_acpi_find_root_bridge,
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};
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static int __init pci_acpi_init(void)
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{
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int ret;
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ret = register_acpi_bus_type(&pci_acpi_bus);
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if (ret)
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return 0;
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return 0;
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}
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arch_initcall(pci_acpi_init);
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