docs(ads1x1x): add missing docstrings

Author: baptleduc

drivers/ads1x1x/ads1x1x_saul.c

@@ -1,21 +1,16 @@
 /*
- * Copyright (C) 2017 OTA keys S.A.
- *               2018 Acutam Automation, LLC
- *
- * This file is subject to the terms and conditions of the GNU Lesser
- * General Public License v2.1. See the file LICENSE in the top level
- * directory for more details.
+ * SPDX-FileCopyrightText: 2025 Baptiste Le Duc <[email protected]>
+ * SPDX-License-Identifier: LGPL-2.1-only
  */
 
 /**
- * @ingroup     drivers_ads101x
+ * @ingroup     drivers_ads1x1x
  * @{
  *
  * @file
  * @brief       ADS101x/111x adaption to the RIOT actuator/sensor interface
  *
- * @author      Vincent Dupont <[email protected]>
- * @author      Matthew Blue <[email protected]>
+ * @author      Baptiste Le Duc <[email protected]>
  *
  * @}
  */

drivers/include/ads1x1x.h

@@ -1,5 +1,30 @@
+/*
+ * SPDX-FileCopyrightText: 2025 Baptiste Le Duc <[email protected]>
+ * SPDX-License-Identifier: LGPL-2.1-only
+ */
+
 #pragma once
 
+/**
+ * @defgroup   drivers_ads1x1x ADS101x/111x ADC device driver
+ * @ingroup    drivers_sensors
+ * @ingroup    drivers_saul
+ * @brief      I2C Analog-to-Digital Converter device driver
+ *
+ * This driver works with ADS1013-4-5 and ADS1113-4-5.
+ *
+ * This driver provides @ref drivers_saul capabilities.
+ * @{
+ *
+ * @file
+ * @brief      ADS101x/111x ADC device driver
+ *
+ * ADC and alert functionality are separated into two devices to
+ * prevent wasteful representations on muxed devices.
+ *
+ * @author     Baptiste Le Duc <[email protected]>
+ */
+
 #ifdef __cplusplus
 extern "C" {
 #endif