82 lines
2.0 KiB
C
82 lines
2.0 KiB
C
/*
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* sst_match_apci.c - SST (LPE) match for ACPI enumeration.
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*
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* Copyright (c) 2013-15, Intel Corporation.
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*
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*/
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#include "sst-acpi.h"
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static acpi_status sst_acpi_find_name(acpi_handle handle, u32 level,
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void *context, void **ret)
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{
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struct acpi_device *adev;
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const char *name = NULL;
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if (acpi_bus_get_device(handle, &adev))
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return AE_OK;
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if (adev->status.present && adev->status.functional) {
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name = acpi_dev_name(adev);
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*(const char **)ret = name;
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return AE_CTRL_TERMINATE;
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}
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return AE_OK;
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}
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const char *sst_acpi_find_name_from_hid(const u8 hid[ACPI_ID_LEN])
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{
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const char *name = NULL;
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acpi_status status;
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status = acpi_get_devices(hid, sst_acpi_find_name, NULL,
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(void **)&name);
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if (ACPI_FAILURE(status) || name[0] == '\0')
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return NULL;
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return name;
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}
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EXPORT_SYMBOL_GPL(sst_acpi_find_name_from_hid);
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static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level,
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void *context, void **ret)
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{
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unsigned long long sta;
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acpi_status status;
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*(bool *)context = true;
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status = acpi_evaluate_integer(handle, "_STA", NULL, &sta);
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if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT))
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*(bool *)context = false;
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return AE_OK;
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}
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struct sst_acpi_mach *sst_acpi_find_machine(struct sst_acpi_mach *machines)
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{
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struct sst_acpi_mach *mach;
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bool found = false;
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for (mach = machines; mach->id[0]; mach++)
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if (ACPI_SUCCESS(acpi_get_devices(mach->id,
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sst_acpi_mach_match,
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&found, NULL)) && found)
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return mach;
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return NULL;
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}
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EXPORT_SYMBOL_GPL(sst_acpi_find_machine);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Intel Common ACPI Match module");
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