diff options
Diffstat (limited to 'drivers/net/wireless/intel/iwlwifi/fw/acpi.c')
| -rw-r--r-- | drivers/net/wireless/intel/iwlwifi/fw/acpi.c | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c index 7d6e6c80b892..d3ab40fc8ab0 100644 --- a/drivers/net/wireless/intel/iwlwifi/fw/acpi.c +++ b/drivers/net/wireless/intel/iwlwifi/fw/acpi.c @@ -1023,3 +1023,37 @@ out_free: kfree(data); return ret; } + +int iwl_acpi_get_dsbr(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_DSBR_METHOD); + if (IS_ERR(data)) + return ret; + + wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, + ACPI_DSBR_WIFI_DATA_SIZE, + &tbl_rev); + if (IS_ERR(wifi_pkg)) + goto out_free; + + if (tbl_rev != ACPI_DSBR_WIFI_DATA_REV) { + IWL_DEBUG_RADIO(fwrt, "Unsupported ACPI DSBR 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_DEBUG_RADIO(fwrt, "Loaded DSBR config from ACPI value: 0x%x\n", + *value); + ret = 0; +out_free: + kfree(data); + return ret; +} |