wifi: iwlwifi: mvm: add DSM_FUNC_ENABLE_6E value to debugfs

In order to simplify checking that this value was set up
correctly, add it to debugfs.
Signed-off-by: Johannes Berg <johannes.berg@intel.com>
Signed-off-by: Gregory Greenman <gregory.greenman@intel.com>
Link: https://lore.kernel.org/r/20230413213309.c9a787710e1e.If509b2e510e22d62f3eefb2c54ff1645e331dc23@changeidSigned-off-by: Johannes Berg <johannes.berg@intel.com>

drivers/net/wireless/intel/iwlwifi/mvm/debugfs.c

@@ -340,6 +340,26 @@ static ssize_t iwl_dbgfs_sar_geo_profile_read(struct file *file,
 
 	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
 }
+
+static ssize_t iwl_dbgfs_wifi_6e_enable_read(struct file *file,
+					     char __user *user_buf,
+					     size_t count, loff_t *ppos)
+{
+	struct iwl_mvm *mvm = file->private_data;
+	int err, pos;
+	char buf[12];
+	u32 value;
+
+	err = iwl_acpi_get_dsm_u32(mvm->fwrt.dev, 0,
+				   DSM_FUNC_ENABLE_6E,
+				   &iwl_guid, &value);
+	if (err)
+		return err;
+
+	pos = sprintf(buf, "0x%08x\n", value);
+
+	return simple_read_from_buffer(user_buf, count, ppos, buf, pos);
+}
 #endif
 
 static ssize_t iwl_dbgfs_stations_read(struct file *file, char __user *user_buf,
@@ -1898,6 +1918,7 @@ MVM_DEBUGFS_READ_FILE_OPS(uapsd_noagg_bssids);
 
 #ifdef CONFIG_ACPI
 MVM_DEBUGFS_READ_FILE_OPS(sar_geo_profile);
+MVM_DEBUGFS_READ_FILE_OPS(wifi_6e_enable);
 #endif
 
 MVM_DEBUGFS_READ_WRITE_STA_FILE_OPS(amsdu_len, 16);
@@ -2092,6 +2113,7 @@ void iwl_mvm_dbgfs_register(struct iwl_mvm *mvm)
 	MVM_DEBUGFS_ADD_FILE(tas_get_status, mvm->debugfs_dir, 0400);
 #ifdef CONFIG_ACPI
 	MVM_DEBUGFS_ADD_FILE(sar_geo_profile, mvm->debugfs_dir, 0400);
+	MVM_DEBUGFS_ADD_FILE(wifi_6e_enable, mvm->debugfs_dir, 0400);
 #endif
 	MVM_DEBUGFS_ADD_FILE(he_sniffer_params, mvm->debugfs_dir, 0600);