diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/fw/uefi.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/uefi.c | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c index 02df96c3aa51..cc7659d59cf0 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/uefi.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/uefi.c @@ -777,3 +777,29 @@ int iwl_uefi_get_puncturing(struct iwl_fw_runtime *fwrt) return puncturing; } IWL_EXPORT_SYMBOL(iwl_uefi_get_puncturing); + +int iwl_uefi_get_dsbr(struct iwl_fw_runtime *fwrt, u32 *value) +{ + struct uefi_cnv_wlan_dsbr_data *data; + int ret = 0; + + data = iwl_uefi_get_verified_variable_guid(fwrt->trans, + &IWL_EFI_WIFI_BT_GUID, + IWL_UEFI_DSBR_NAME, "DSBR", + sizeof(*data), NULL); + if (IS_ERR(data)) + return -EINVAL; + + if (data->revision != IWL_UEFI_DSBR_REVISION) { + ret = -EINVAL; + IWL_DEBUG_RADIO(fwrt, "Unsupported UEFI DSBR revision:%d\n", + data->revision); + goto out; + } + *value = data->config; + IWL_DEBUG_RADIO(fwrt, "Loaded DSBR config from UEFI value: 0x%x\n", + *value); +out: + kfree(data); + return ret; +} |