diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/fw/acpi.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/acpi.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c index 4caf2e25a297..fa339791223b 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c @@ -1,7 +1,7 @@ // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause /* * Copyright (C) 2017 Intel Deutschland GmbH - * Copyright (C) 2019-2023 Intel Corporation + * Copyright (C) 2019-2024 Intel Corporation */ #include <linux/uuid.h> #include "iwl-drv.h" @@ -960,3 +960,37 @@ out_free: kfree(data); } IWL_EXPORT_SYMBOL(iwl_acpi_get_guid_lock_status); + +int iwl_acpi_get_wbem(struct iwl_fw_runtime *fwrt, u32 *value) +{ + union acpi_object *wifi_pkg, *data; + int ret = -ENOENT; + int tbl_rev; + + data = iwl_acpi_get_object(fwrt->dev, ACPI_WBEM_METHOD); + if (IS_ERR(data)) + return ret; + + wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, + ACPI_WBEM_WIFI_DATA_SIZE, + &tbl_rev); + if (IS_ERR(wifi_pkg)) + goto out_free; + + if (tbl_rev != IWL_ACPI_WBEM_REVISION) { + IWL_DEBUG_RADIO(fwrt, "Unsupported ACPI WBEM revision:%d\n", + tbl_rev); + goto out_free; + } + + if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) + goto out_free; + + *value = wifi_pkg->package.elements[1].integer.value & + IWL_ACPI_WBEM_REV0_MASK; + IWL_DEBUG_RADIO(fwrt, "Loaded WBEM config from ACPI\n"); + ret = 0; +out_free: + kfree(data); + return ret; +} |