diff options
author | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-07-07 22:48:25 +0200 |
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committer | Rafael J. Wysocki <rafael.j.wysocki@intel.com> | 2015-07-07 22:48:25 +0200 |
commit | 8076ca480f40c51ab87d8301c830a817b900b4d1 (patch) | |
tree | 63fec44892b0566f47102348f1c208fcabee513f /drivers/acpi | |
parent | d0aee67fa19260d772b07f144cf6c93e63431f67 (diff) | |
parent | 2051e9248688e4c36e4de2e93b88fa0d74e86261 (diff) |
Merge branch 'acpi-scan'
* acpi-scan:
ata: ahci_platform: Add ACPI _CLS matching
ACPI / scan: Add support for ACPI _CLS device matching
Diffstat (limited to 'drivers/acpi')
-rw-r--r-- | drivers/acpi/scan.c | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c index 2649a068671d..ec256352f423 100644 --- a/drivers/acpi/scan.c +++ b/drivers/acpi/scan.c @@ -1019,6 +1019,29 @@ static bool acpi_of_match_device(struct acpi_device *adev, return false; } +static bool __acpi_match_device_cls(const struct acpi_device_id *id, + struct acpi_hardware_id *hwid) +{ + int i, msk, byte_shift; + char buf[3]; + + if (!id->cls) + return false; + + /* Apply class-code bitmask, before checking each class-code byte */ + for (i = 1; i <= 3; i++) { + byte_shift = 8 * (3 - i); + msk = (id->cls_msk >> byte_shift) & 0xFF; + if (!msk) + continue; + + sprintf(buf, "%02x", (id->cls >> byte_shift) & msk); + if (strncmp(buf, &hwid->id[(i - 1) * 2], 2)) + return false; + } + return true; +} + static const struct acpi_device_id *__acpi_match_device( struct acpi_device *device, const struct acpi_device_id *ids, @@ -1036,9 +1059,12 @@ static const struct acpi_device_id *__acpi_match_device( list_for_each_entry(hwid, &device->pnp.ids, list) { /* First, check the ACPI/PNP IDs provided by the caller. */ - for (id = ids; id->id[0]; id++) - if (!strcmp((char *) id->id, hwid->id)) + for (id = ids; id->id[0] || id->cls; id++) { + if (id->id[0] && !strcmp((char *) id->id, hwid->id)) return id; + else if (id->cls && __acpi_match_device_cls(id, hwid)) + return id; + } /* * Next, check ACPI_DT_NAMESPACE_HID and try to match the @@ -2101,6 +2127,8 @@ static void acpi_set_pnp_ids(acpi_handle handle, struct acpi_device_pnp *pnp, if (info->valid & ACPI_VALID_UID) pnp->unique_id = kstrdup(info->unique_id.string, GFP_KERNEL); + if (info->valid & ACPI_VALID_CLS) + acpi_add_id(pnp, info->class_code.string); kfree(info); |