boards/cc1312-launchpad: add saul_gpio definitions

Signed-off-by: Jean Pierre Dudey <me@jeandudey.tech>

boards/cc1312-launchpad/Makefile.dep

@@ -0,0 +1,3 @@
+ifneq (,$(filter saul_default,$(USEMODULE)))
+  USEMODULE += saul_gpio
+endif

boards/cc1312-launchpad/include/gpio_params.h

@@ -0,0 +1,63 @@
+/*
+ * Copyright (C) 2021 Jean Pierre Dudey
+ *
+ * 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.
+ */
+
+/**
+ * @ingroup   boards_cc1312_launchpad
+ * @{
+ *
+ * @file
+ * @brief     Board specific configuration of direct mapped GPIOs
+ *
+ * @author    Jean Pierre Dudey <jeandudey@hotmail.com>
+ */
+
+#ifndef GPIO_PARAMS_H
+#define GPIO_PARAMS_H
+
+#include "board.h"
+#include "saul/periph.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @brief    GPIO pin configuration
+ */
+static const saul_gpio_params_t saul_gpio_params[] =
+{
+    {
+        .name = "LED(red)",
+        .pin = LED0_PIN,
+        .mode = GPIO_OUT,
+    },
+    {
+        .name = "LED(green)",
+        .pin = LED1_PIN,
+        .mode = GPIO_OUT,
+    },
+    {
+        .name = "Button(BTN-1)",
+        .pin  = BTN0_PIN,
+        .mode = BTN0_MODE,
+        .flags = SAUL_GPIO_INVERTED
+    },
+    {
+        .name = "Button(BTN-2)",
+        .pin  = BTN1_PIN,
+        .mode = BTN1_MODE,
+        .flags = SAUL_GPIO_INVERTED
+    },
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* GPIO_PARAMS_H */
+/** @} */