drivers/isl29020: added SAUL integration

drivers/include/isl29020.h

@@ -60,6 +60,16 @@ typedef enum {
     ISL29020_RANGE_64K = 3      /**< set range to 0-64000 lux */
 } isl29020_range_t;
 
+/**
+ * @brief Data structure holding the full set of configuration parameters
+ */
+typedef struct {
+    i2c_t i2c;                  /**< I2C bus the device is connected to */
+    uint8_t addr;               /**< address on that bus */
+    isl29020_range_t range;     /**< range setting to use */
+    isl29020_mode_t mode;       /**< measurement mode to use */
+} isl29020_params_t;
+
 /**
  * @brief Initialize a new ISL29020 device
  *

drivers/isl29020/isl29020_saul.c

@@ -0,0 +1,45 @@
+/*
+ * Copyright (C) 2015 Freie Universität Berlin
+ *
+ * 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     driver_isl29020
+ * @{
+ *
+ * @file
+ * @brief       ISL29020 adaption to the RIOT actuator/sensor interface
+ *
+ * @author      Hauke Petersen <hauke.petersen@fu-berlin.de>
+ *
+ * @}
+ */
+
+#include <string.h>
+
+#include "saul.h"
+#include "isl29020.h"
+
+static int read(void *dev, phydat_t *res)
+{
+    isl29020_t *d = (isl29020_t *)dev;
+    res->val[0] = (int16_t)isl29020_read(d);
+    memset(&(res->val[1]), 0, 2 * sizeof(int16_t));
+    res->unit = UNIT_CD;
+    res->scale = 0;
+    return 1;
+}
+
+static int write(void *dev, phydat_t *state)
+{
+    return -ENOTSUP;
+}
+
+const saul_driver_t isl29020_saul_driver = {
+    .read = read,
+    .write = write,
+    .type = SAUL_SENSE_LIGHT,
+};