sys/auto_init/saul: provide saul adaption to lis3mdl

drivers/lis3mdl/lis3mdl_saul.c

+/*
+ * Copyright (C) 2017 Inria
+ *
+ * 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     drivers_lis3mdl
+ * @{
+ *
+ * @file
+ * @brief       LIS3MDL adaption to the RIOT actuator/sensor interface
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ *
+ * @}
+ */
+
+#include <string.h>
+
+#include "saul.h"
+#include "lis3mdl.h"
+
+static int read_mag(const void *dev, phydat_t *res)
+{
+    const lis3mdl_t *d = (const lis3mdl_t *)dev;
+
+    lis3mdl_read_mag(d, (lis3mdl_3d_data_t *)res);
+
+    res->unit = UNIT_GS;
+    res->scale = -3;
+    return 3;
+}
+
+const saul_driver_t lis3mdl_saul_mag_driver = {
+    .read = read_mag,
+    .write = saul_notsup,
+    .type = SAUL_SENSE_MAG,
+};

sys/auto_init/auto_init.c

@@ -274,6 +274,10 @@ void auto_init(void)
     extern void auto_init_lis3dh(void);
     auto_init_lis3dh();
 #endif
+#ifdef MODULE_LIS3MDL
+extern void auto_init_lis3mdl(void);
+auto_init_lis3mdl();
+#endif
 #ifdef MODULE_MAG3110
     extern void auto_init_mag3110(void);
     auto_init_mag3110();

sys/auto_init/saul/auto_init_lis3mdl.c

+/*
+ * Copyright (C) 2017 Inria
+ *
+ * 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     auto_init_saul
+ * @{
+ *
+ * @file
+ * @brief       Auto initialization of LIS3MDL magnetometer
+ *
+ * @author      Alexandre Abadie <alexandre.abadie@inria.fr>
+ *
+ * @}
+ */
+
+#ifdef MODULE_LIS3MDL
+
+#include "log.h"
+#include "saul_reg.h"
+#include "lis3mdl.h"
+#include "lis3mdl_params.h"
+
+/**
+ * @brief   Define the number of configured sensors
+ */
+#define LIS3MDL_NUM    (sizeof(lis3mdl_params)/sizeof(lis3mdl_params[0]))
+
+/**
+ * @brief   Allocate memory for the device descriptors
+ */
+static lis3mdl_t lis3mdl_devs[LIS3MDL_NUM];
+
+/**
+ * @brief   Memory for the SAUL registry entries
+ */
+static saul_reg_t saul_entries[LIS3MDL_NUM];
+
+/**
+ * @brief   Define the number of saul info
+ */
+#define LIS3MDL_INFO_NUM    (sizeof(lis3mdl_saul_info)/sizeof(lis3mdl_saul_info[0]))
+
+/**
+ * @brief   Reference the driver structs
+ */
+extern saul_driver_t lis3mdl_saul_mag_driver;
+
+void auto_init_lis3mdl(void)
+{
+    assert(LIS3MDL_NUM == LIS3MDL_INFO_NUM);
+
+    for (unsigned int i = 0; i < LIS3MDL_NUM; i++) {
+        LOG_DEBUG("[auto_init_saul] initializing lis3mdl #%u\n", i);
+
+        if (lis3mdl_init(&lis3mdl_devs[i], &lis3mdl_params[i]) < 0) {
+            LOG_ERROR("[auto_init_saul] error initializing lis3mdl #%u\n", i);
+            continue;
+        }
+
+        saul_entries[i].dev = &(lis3mdl_devs[i]);
+        saul_entries[i].name = lis3mdl_saul_info[i].name;
+        saul_entries[i].driver = &lis3mdl_saul_mag_driver;
+        saul_reg_add(&(saul_entries[i]));
+    }
+}
+
+#else
+typedef int dont_be_pedantic;
+#endif /* MODULE_LIS3MDL */