linux-imx
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committed 866897768781
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// SPDX-License-Identifier: GPL-2.02
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#include <linux/pci.h>4
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#include <linux/acpi.h>5
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#include <acpi/reboot.h>6
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#ifdef CONFIG_PCI7
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static void acpi_pci_reboot(struct acpi_generic_address *rr, u8 reset_value)8
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{9
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unsigned int devfn;10
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struct pci_bus *bus0;11
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/* The reset register can only live on bus 0. */13
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bus0 = pci_find_bus(0, 0);14
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if (!bus0)15
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return;16
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/* Form PCI device/function pair. */17
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devfn = PCI_DEVFN((rr->address >> 32) & 0xffff,18
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(rr->address >> 16) & 0xffff);19
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pr_debug("Resetting with ACPI PCI RESET_REG.\n");20
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/* Write the value that resets us. */21
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pci_bus_write_config_byte(bus0, devfn,22
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(rr->address & 0xffff), reset_value);23
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}25
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#else26
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static inline void acpi_pci_reboot(struct acpi_generic_address *rr,27
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u8 reset_value)28
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{29
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pr_warn_once("PCI configuration space access is not supported\n");30
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}31
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#endif24
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void acpi_reboot(void)26
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{27
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struct acpi_generic_address *rr;28
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u8 reset_value;29
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if (acpi_disabled)31
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return;32
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rr = &acpi_gbl_FADT.reset_register;