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ACPI: Move PCI reset to a separate function
Getting ready to factor out PCI specific code when CONFIG_PCI is unset. Create a acpi_pci_reset() that kick starts PCI specific reset. Signed-off-by: Sinan Kaya <okaya@kernel.org> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
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parent
7566ec393f
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1 changed files with 19 additions and 13 deletions
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@ -4,11 +4,27 @@
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#include <linux/acpi.h>
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#include <linux/acpi.h>
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#include <acpi/reboot.h>
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#include <acpi/reboot.h>
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static void acpi_pci_reboot(struct acpi_generic_address *rr, u8 reset_value)
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{
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unsigned int devfn;
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struct pci_bus *bus0;
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/* The reset register can only live on bus 0. */
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bus0 = pci_find_bus(0, 0);
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if (!bus0)
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return;
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/* Form PCI device/function pair. */
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devfn = PCI_DEVFN((rr->address >> 32) & 0xffff,
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(rr->address >> 16) & 0xffff);
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pr_debug("Resetting with ACPI PCI RESET_REG.\n");
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/* Write the value that resets us. */
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pci_bus_write_config_byte(bus0, devfn,
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(rr->address & 0xffff), reset_value);
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}
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void acpi_reboot(void)
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void acpi_reboot(void)
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{
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{
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struct acpi_generic_address *rr;
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struct acpi_generic_address *rr;
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struct pci_bus *bus0;
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unsigned int devfn;
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u8 reset_value;
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u8 reset_value;
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if (acpi_disabled)
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if (acpi_disabled)
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@ -33,17 +49,7 @@ void acpi_reboot(void)
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* on a device on bus 0. */
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* on a device on bus 0. */
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switch (rr->space_id) {
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switch (rr->space_id) {
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case ACPI_ADR_SPACE_PCI_CONFIG:
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case ACPI_ADR_SPACE_PCI_CONFIG:
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/* The reset register can only live on bus 0. */
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acpi_pci_reboot(rr, reset_value);
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bus0 = pci_find_bus(0, 0);
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if (!bus0)
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return;
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/* Form PCI device/function pair. */
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devfn = PCI_DEVFN((rr->address >> 32) & 0xffff,
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(rr->address >> 16) & 0xffff);
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printk(KERN_DEBUG "Resetting with ACPI PCI RESET_REG.\n");
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/* Write the value that resets us. */
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pci_bus_write_config_byte(bus0, devfn,
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(rr->address & 0xffff), reset_value);
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break;
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break;
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case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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case ACPI_ADR_SPACE_SYSTEM_MEMORY:
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