diff --git a/boards/jiminy-mega256rfr2/include/board.h b/boards/jiminy-mega256rfr2/include/board.h
index 5379ffff0d0ed6a1269c1cf12adaee7f2e273da6..b14930f95f501370655371a8bd9c05b9c50672ba 100644
--- a/boards/jiminy-mega256rfr2/include/board.h
+++ b/boards/jiminy-mega256rfr2/include/board.h
@@ -124,6 +124,19 @@ extern "C" {
#define CPU_ATMEGA_CLK_SCALE_INIT CPU_ATMEGA_CLK_SCALE_DIV1
/** @} */
+/**
+ * @name TPS6274x Stepdown config
+ * @{
+ */
+#define TPS6274X_PARAMS { .vsel = { GPIO_PIN(PORT_D, 6), \
+ GPIO_PIN(PORT_D, 7), \
+ GPIO_PIN(PORT_G, 0), \
+ GPIO_PIN(PORT_G, 2), \
+ }, \
+ .ctrl_pin = GPIO_PIN(PORT_G, 5) \
+ }
+/** @} */
+
/**
* @brief Initialize board specific hardware, including clock, LEDs and std-IO
*/
diff --git a/drivers/Makefile.dep b/drivers/Makefile.dep
index 176ad0f55588afaaaa380994f5b3ec29af4ad799..692af1fdb4d1fbbde17ceee13a803e695eaf10c7 100644
--- a/drivers/Makefile.dep
+++ b/drivers/Makefile.dep
@@ -452,6 +452,10 @@ ifneq (,$(filter tcs37727,$(USEMODULE)))
FEATURES_REQUIRED += periph_i2c
endif
+ifneq (,$(filter tps6274x,$(USEMODULE)))
+ FEATURES_REQUIRED += periph_gpio
+endif
+
ifneq (,$(filter tja1042,$(USEMODULE)))
USEMODULE += can_trx
FEATURES_REQUIRED += periph_gpio
diff --git a/drivers/Makefile.include b/drivers/Makefile.include
index 5b0b949adcefdeb5f8783b19827e4293ae6b5dba..33f3006526adf55e5430f41fe5b7a0df94447a9d 100644
--- a/drivers/Makefile.include
+++ b/drivers/Makefile.include
@@ -250,6 +250,10 @@ ifneq (,$(filter tmp006,$(USEMODULE)))
USEMODULE_INCLUDES += $(RIOTBASE)/drivers/tmp006/include
endif
+ifneq (,$(filter tps6274x,$(USEMODULE)))
+ USEMODULE_INCLUDES += $(RIOTBASE)/drivers/tps6274x/include
+endif
+
ifneq (,$(filter tsl2561,$(USEMODULE)))
USEMODULE_INCLUDES += $(RIOTBASE)/drivers/tsl2561/include
endif
diff --git a/drivers/doc.txt b/drivers/doc.txt
index feee4e0076787d08ef603fcdfec0afc62596dcc9..35a98e36db0bfe83e0f558872a2c1d8b1711c111 100644
--- a/drivers/doc.txt
+++ b/drivers/doc.txt
@@ -1,6 +1,7 @@
/*
* Copyright (C) 2013 Freie Universität Berlin
- * Copyright (C) 2015 INRIA
+ * 2015 INRIA
+ * 2018 RWTH
*
* 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
@@ -49,3 +50,12 @@
* @ingroup drivers
* @brief Software emulated @ref drivers_periph for UART, SPI, etc
*/
+
+ /**
+ * @defgroup drivers_power Power Supply Drivers
+ * @ingroup drivers
+ * @brief Drivers for power supply devices
+ *
+ * The group of power supply drivers indludes all kinds of AC/DC, DC/DC supply devices
+ * or charger ICs which can be controlled from the host e.g by config pin settings or by bus.
+ */
diff --git a/drivers/include/tps6274x.h b/drivers/include/tps6274x.h
new file mode 100644
index 0000000000000000000000000000000000000000..3610ebf6d83bbe7a2bbf8cd853878006f55663cb
--- /dev/null
+++ b/drivers/include/tps6274x.h
@@ -0,0 +1,87 @@
+/*
+ * Copyright (C) 2017 RWTH Aachen
+ *
+ * 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.
+ */
+
+/**
+ * @defgroup drivers_tps6274x TPS6274x
+ * @ingroup drivers_power
+ * @brief Device driver interface for the TPS6274x DC-DC Converter
+ * @{
+ *
+ * @file
+ * @brief Device driver interface for the TPS6274x DC-DC Converter
+ *
+ * @author Steffen Robertz <steffen.robertz@rwth-aachen.de>
+ * @author Josua Arndt <jarndt@ias.rwth-aachen.de>
+ */
+
+#ifndef TPS6274X_H
+#define TPS6274X_H
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+#include <inttypes.h>
+#include "periph/gpio.h"
+
+/**
+ * @brief TPS6274x Configuration struct
+ */
+typedef struct {
+ gpio_t vsel[4]; /**< select line pin mapping */
+ gpio_t ctrl_pin; /**< ctrl pin mapping */
+} tps6274x_params_t;
+
+/**
+ * @brief Device descriptor for the TPS6274x
+ */
+typedef struct {
+ tps6274x_params_t params; /**< device initialization parameters */
+} tps6274x_t;
+
+/**
+ * @brief Status and error return codes
+ */
+enum {
+ TPS6274X_OK = 0, /**< everything was fine */
+ TPS6274X_ERR_INIT, /**< error during init */
+};
+
+/**
+ * @brief Init converter
+ *
+ * @param[in] dev Initialized device descriptor for TPS6274x device
+ * @param[in] params Initialization parameters
+ *
+ * @return set voltage in mV
+ */
+int tps6274x_init(tps6274x_t *dev, const tps6274x_params_t *params);
+
+/**
+ * @brief Switch to different voltage level
+ *
+ * @param[in] dev Device descriptor for TPS6274x device
+ * @param[in] voltage Voltage to set in mV (needs to be between 1.8V-3.3V
+ * @return the voltage that was set in mV
+ */
+uint16_t tps6274x_switch_voltage(tps6274x_t *dev, uint16_t voltage);
+
+/**
+ * @brief Sets ctrl pin high to power a subsystem connected on the load pin
+ *
+ * @param[in] dev Device descriptor for TPS6274x device
+ * @param[in] status 0 will disable the load, everything else will activate it
+ */
+void tps6274x_load_ctrl(tps6274x_t *dev, int status);
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* TPS6274X_H */
+/** @} */
diff --git a/drivers/tps6274x/Makefile b/drivers/tps6274x/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..48422e909a47d7cd428d10fa73825060ccc8d8c2
--- /dev/null
+++ b/drivers/tps6274x/Makefile
@@ -0,0 +1 @@
+include $(RIOTBASE)/Makefile.base
diff --git a/drivers/tps6274x/include/tps6274x_params.h b/drivers/tps6274x/include/tps6274x_params.h
new file mode 100644
index 0000000000000000000000000000000000000000..3ed96a41c2f2bcb954f4ebbae62d3951c2b45018
--- /dev/null
+++ b/drivers/tps6274x/include/tps6274x_params.h
@@ -0,0 +1,57 @@
+/*
+ * Copyright (C) 2018 HAW Hamburg
+ *
+ * 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_tps6274x
+ *
+ * @{
+ * @file
+ * @brief Default configuration for TPS6274x DC-DC Converter
+ *
+ * @author Peter Kietzmann <peter.kietzmann@haw-hamburg.de>
+ */
+
+#ifndef TPS6274X_PARAMS_H
+#define TPS6274X_PARAMS_H
+
+#include "board.h"
+#include "tps6274x.h"
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @name Set default configuration parameters for the TPS6274x
+ * @{
+ */
+#ifndef TPS6274X_PARAMS
+#define TPS6274X_PARAMS { .vsel = { GPIO_PIN(0, 0), \
+ GPIO_PIN(0, 1), \
+ GPIO_PIN(0, 2), \
+ GPIO_PIN(0, 3), \
+ }, \
+ .ctrl_pin = GPIO_PIN(0, 4) \
+ }
+#endif
+/**@}*/
+
+/**
+ * @brief Configure TPS6274X
+ */
+static const tps6274x_params_t tps6274x_params[] =
+{
+ TPS6274X_PARAMS
+};
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* TPS6274X_PARAMS_H */
+/** @} */
diff --git a/drivers/tps6274x/tps6274x.c b/drivers/tps6274x/tps6274x.c
new file mode 100644
index 0000000000000000000000000000000000000000..703d55e2bdc4f9ef8f4cbb2269d9df2209b652ce
--- /dev/null
+++ b/drivers/tps6274x/tps6274x.c
@@ -0,0 +1,86 @@
+/*
+ * Copyright (C) 2017 RWTH Aachen
+ *
+ * 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_tps6274x
+ * @{
+ *
+ * @file
+ * @brief Device driver implementation for the TPS6274x family DC/DC-converter.
+ *
+ * @author Steffen Robertz <steffen.robertz@rwth-aachen.de>
+ * @author Josua Arndt <jarndt@ias.rwth-aachen.de>
+ *
+ * @}
+ */
+
+#include "tps6274x.h"
+#include "periph/gpio.h"
+
+#define ENABLE_DEBUG (0)
+#include "debug.h"
+
+int tps6274x_init(tps6274x_t *dev, const tps6274x_params_t *params)
+{
+ int ret;
+
+ dev->params = *params;
+ for (uint8_t i = 0; i < 4; i++) {
+ if (dev->params.vsel[i] != GPIO_UNDEF) {
+ ret = gpio_init(dev->params.vsel[i], GPIO_OUT);
+ if(ret < 0) {
+ return TPS6274X_ERR_INIT;
+ }
+ }
+ }
+ if (dev->params.ctrl_pin != GPIO_UNDEF) {
+ ret = gpio_init(dev->params.ctrl_pin, GPIO_OUT);
+ if(ret < 0) {
+ return TPS6274X_ERR_INIT;
+ }
+ }
+ return TPS6274X_OK;
+}
+
+uint16_t tps6274x_switch_voltage(tps6274x_t *dev, uint16_t voltage)
+{
+ if (voltage < 1800) {
+ voltage = 1800;
+ }
+ else if (voltage > 3300) {
+ voltage = 3300;
+ }
+ uint8_t vsel = (voltage - 1800) / 100;
+ uint8_t vsel_set = 0;
+ for (uint8_t i = 0; i < 4; i++) {
+ if (dev->params.vsel[i] != GPIO_UNDEF) {
+ gpio_write(dev->params.vsel[i], (vsel & (0x01 << i)));
+ /* mark pins that could and had to be set */
+ vsel_set |= vsel & (1 << i);
+ }
+#if ENABLE_DEBUG
+ else {
+ printf("[tps6274x] Pin vsel%u is not connected but is required for \
+ selected voltage level\n", i + 1);
+ }
+#endif
+ }
+ return ((uint16_t)vsel_set) * 100 + 1800;
+}
+
+void tps6274x_load_ctrl(tps6274x_t *dev, int status)
+{
+ if (dev->params.ctrl_pin != GPIO_UNDEF) {
+ gpio_write(dev->params.ctrl_pin, status);
+ }
+#if ENABLE_DEBUG
+ else {
+ printf("[TPS6274x] CTRL Pin not defined, no load activation possible\n");
+ }
+#endif
+}
diff --git a/tests/driver_tps6274x/Makefile b/tests/driver_tps6274x/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..7e1dbc97a36cb4caa9415865356a935d25fb9774
--- /dev/null
+++ b/tests/driver_tps6274x/Makefile
@@ -0,0 +1,7 @@
+APPLICATION = driver_tps6274x
+include ../Makefile.tests_common
+
+USEMODULE += tps6274x
+USEMODULE += xtimer
+
+include $(RIOTBASE)/Makefile.include
diff --git a/tests/driver_tps6274x/README.md b/tests/driver_tps6274x/README.md
new file mode 100644
index 0000000000000000000000000000000000000000..d967b494e7b330cb2e2d5bf34fa7e441e9411136
--- /dev/null
+++ b/tests/driver_tps6274x/README.md
@@ -0,0 +1,11 @@
+## About
+Tests the tps6274x step-down converter
+
+## Usage
+Build the test by using the `make BOARD=??? flash` command in the `test/driver_tps6274x/` folder.
+
+## Results
+The stepdown converter will step from 1.8V to 3.3V in 100mV steps.
+Each voltage will be set for 3 seconds and can be measured at the VOUT Pin.
+After 1 second also the LOAD output pin will be enabled for 2 seconds
+untill the next voltage is set.
diff --git a/tests/driver_tps6274x/main.c b/tests/driver_tps6274x/main.c
new file mode 100644
index 0000000000000000000000000000000000000000..c5999f00e275f4fc9b2fc2d871373ad3484dec21
--- /dev/null
+++ b/tests/driver_tps6274x/main.c
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2017 RWTH Aachen, Josua Arndt, Steffen Robertz
+ *
+ * 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 tests
+ * @{
+ *
+ * @file
+ * @brief Test application for the tps6274x Step-Down converter
+ *
+ * @author Steffen Robertz <steffen.robertz@rwth-aachen.de>
+ * @author Josua Arndt <jarndt@ias.rwth-aachen.de>
+ *
+ * @}
+ */
+#include <stdio.h>
+
+#include "board.h"
+#include "xtimer.h"
+#include "tps6274x.h"
+#include "tps6274x_params.h"
+
+int main(void)
+{
+ tps6274x_t dev;
+
+ puts("This application will test the tps6274x step down converter by switching through all voltages.");
+ puts("Every voltage will be active for 3s and can be verified with a multimeter");
+
+ tps6274x_init(&dev, &tps6274x_params[0]);
+ for (unsigned int voltage = 1800; voltage <= 3300; voltage += 100) {
+ printf("%u mV \n", voltage);
+ if (voltage != tps6274x_switch_voltage(&dev, voltage)) {
+ printf("Not all Selector lines are connected in order to set a level of %umV.", voltage);
+ }
+ xtimer_sleep(1);
+ puts("Load PIN will be enabled for 2s");
+ tps6274x_load_ctrl(&dev, 1);
+ xtimer_sleep(2);
+ puts("Load PIN will be shut off");
+ tps6274x_load_ctrl(&dev, 0);
+ }
+ printf("Test Done");
+ return 0;
+}