Driver for INA3221 current and power and bus voltage monitor

drivers/Makefile.dep

@@ -214,6 +214,16 @@ ifneq (,$(filter ina220,$(USEMODULE)))
   FEATURES_REQUIRED += periph_i2c
 endif
 
+ifneq (,$(filter ina3221,$(USEMODULE)))
+  FEATURES_REQUIRED += periph_gpio
+  FEATURES_REQUIRED += periph_i2c
+endif
+
+ifneq (,$(filter ina3221_alerts,$(USEMODULE)))
+  USEMODULE += ina3221
+  USEMODULE += periph_gpio_irq
+endif
+
 ifneq (,$(filter io1_xplained,$(USEMODULE)))
   FEATURES_REQUIRED += periph_gpio
   FEATURES_REQUIRED += periph_adc

drivers/Makefile.include

@@ -118,6 +118,10 @@ ifneq (,$(filter ina220,$(USEMODULE)))
   USEMODULE_INCLUDES += $(RIOTBASE)/drivers/ina220/include
 endif
 
+ifneq (,$(filter ina3221,$(USEMODULE)))
+  USEMODULE_INCLUDES += $(RIOTBASE)/drivers/ina3221/include
+endif
+
 ifneq (,$(filter io1_xplained,$(USEMODULE)))
   USEMODULE_INCLUDES += $(RIOTBASE)/drivers/io1_xplained/include
 endif

drivers/ina3221/Makefile

@@ -0,0 +1,7 @@
+# enable submodules
+SUBMODULES := 1
+
+# Always build base module and SAUL integration (rely on linker to garbage collect SAUL)
+SRC := ina3221.c ina3221_saul.c
+
+include $(RIOTBASE)/Makefile.base

drivers/ina3221/alerts.c

@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2019 Otto-von-Guericke-Universität Magdeburg
+ *
+ * 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_ina3221
+ * @{
+ *
+ * @file
+ * @brief       Functions to enable/disable GPIO alerts
+ *              for INA3221
+ *
+ * @author      Fabian Hüßler <fabian.huessler@ovgu.de>
+ *
+ * @}
+ */
+
+#include <errno.h>
+#include "periph/gpio.h"
+#include "ina3221.h"
+
+int _ina3221_enable_alert(ina3221_t *dev, ina3221_alert_t alert,
+                          ina3221_alert_cb_t cb, void *arg)
+{
+    if (alert >= INA3221_NUM_ALERTS) {
+        return -ERANGE;
+    }
+    if (dev->params.upins.apins.alert_pins[alert] == GPIO_UNDEF) {
+        return -ENOTSUP;
+    }
+    dev->alert_callbacks[alert] = cb;
+    dev->alert_callback_arguments[alert] = arg;
+    int check = gpio_init_int(
+        dev->params.upins.apins.alert_pins[alert],
+        (dev->params.gpio_config & (1 << alert)) ? GPIO_IN_PU : GPIO_IN,
+        GPIO_FALLING,
+        cb,
+        arg
+        );
+    return check ? check : INA3221_OK;
+}
+
+int _ina3221_disable_alert(ina3221_t *dev, ina3221_alert_t alert)
+{
+    if (alert >= INA3221_NUM_ALERTS) {
+        return -ERANGE;
+    }
+    if (dev->params.upins.apins.alert_pins[alert] == GPIO_UNDEF) {
+        return -ENOTSUP;
+    }
+    gpio_irq_disable(dev->params.upins.apins.alert_pins[alert]);
+    return INA3221_OK;
+}