projects / linux-2.6-block.git / blame
| Commit | Line | Data |
|---|---|---|
| 95f09801 VK |
1 | /* |
| 2 | * sst_match_apci.c - SST (LPE) match for ACPI enumeration. | |
| 3 | * | |
| 4 | * Copyright (c) 2013-15, Intel Corporation. | |
| 5 | * | |
| 6 | * | |
| 7 | * This program is free software; you can redistribute it and/or modify it | |
| 8 | * under the terms and conditions of the GNU General Public License, | |
| 9 | * version 2, as published by the Free Software Foundation. | |
| 10 | * | |
| 11 | * This program is distributed in the hope it will be useful, but WITHOUT | |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for | |
| 14 | * more details. | |
| 15 | */ | |
| 95f09801 VK |
16 | |
| 17 | #include "sst-acpi.h" | |
| 18 | ||
| 1fdb7c14 PLB |
19 | static acpi_status sst_acpi_find_name(acpi_handle handle, u32 level, |
| 20 | void *context, void **ret) | |
| 21 | { | |
| 22 | struct acpi_device *adev; | |
| 23 | const char *name = NULL; | |
| 24 | ||
| 25 | if (acpi_bus_get_device(handle, &adev)) | |
| 26 | return AE_OK; | |
| 27 | ||
| 28 | if (adev->status.present && adev->status.functional) { | |
| 29 | name = acpi_dev_name(adev); | |
| 30 | *(const char **)ret = name; | |
| 31 | return AE_CTRL_TERMINATE; | |
| 32 | } | |
| 33 | ||
| 34 | return AE_OK; | |
| 35 | } | |
| 36 | ||
| 37 | const char *sst_acpi_find_name_from_hid(const u8 hid[ACPI_ID_LEN]) | |
| 38 | { | |
| 39 | const char *name = NULL; | |
| 40 | acpi_status status; | |
| 41 | ||
| 42 | status = acpi_get_devices(hid, sst_acpi_find_name, NULL, | |
| 43 | (void **)&name); | |
| 44 | ||
| 45 | if (ACPI_FAILURE(status) || name[0] == '\0') | |
| 46 | return NULL; | |
| 47 | ||
| 48 | return name; | |
| 49 | } | |
| 50 | EXPORT_SYMBOL_GPL(sst_acpi_find_name_from_hid); | |
| 51 | ||
| 95f09801 VK |
52 | static acpi_status sst_acpi_mach_match(acpi_handle handle, u32 level, |
| 53 | void *context, void **ret) | |
| 54 | { | |
| cab47385 PLB |
55 | unsigned long long sta; |
| 56 | acpi_status status; | |
| 57 | ||
| 95f09801 | 58 | *(bool *)context = true; |
| cab47385 PLB |
59 | status = acpi_evaluate_integer(handle, "_STA", NULL, &sta); |
| 60 | if (ACPI_FAILURE(status) || !(sta & ACPI_STA_DEVICE_PRESENT)) | |
| 61 | *(bool *)context = false; | |
| 62 | ||
| 95f09801 VK |
63 | return AE_OK; |
| 64 | } | |
| 65 | ||
| 66 | struct sst_acpi_mach *sst_acpi_find_machine(struct sst_acpi_mach *machines) | |
| 67 | { | |
| 68 | struct sst_acpi_mach *mach; | |
| 69 | bool found = false; | |
| 70 | ||
| 71 | for (mach = machines; mach->id[0]; mach++) | |
| 72 | if (ACPI_SUCCESS(acpi_get_devices(mach->id, | |
| 73 | sst_acpi_mach_match, | |
| 74 | &found, NULL)) && found) | |
| 75 | return mach; | |
| 95f09801 VK |
76 | return NULL; |
| 77 | } | |
| 78 | EXPORT_SYMBOL_GPL(sst_acpi_find_machine); | |
| 8ceffd22 VK |
79 | |
| 80 | MODULE_LICENSE("GPL v2"); | |
| 81 | MODULE_DESCRIPTION("Intel Common ACPI Match module"); |