drivers/gpio/gpio_gecko.c - third_party/github/zephyrproject-rtos/zephyr - Git at Google

 /*
  * Copyright (c) 2017, Christian Taedcke
  *
  * SPDX-License-Identifier: Apache-2.0
  */

 #include <errno.h>
 #include <drivers/gpio.h>
 #include <soc.h>
 #include <em_gpio.h>

 #include "gpio_utils.h"

 /*
  * Macros to set the GPIO MODE registers
  *
  * See https://www.silabs.com/documents/public/reference-manuals/EFM32WG-RM.pdf
  * pages 972 and 982.
  */
 /**
  * @brief Create the value to set the GPIO MODEL register
  * @param[in] pin The index of the pin. Valid values are 0..7.
  * @param[in] mode The mode that should be set.
  * @return The value that can be set into the GPIO MODEL register.
  */
 #define GECKO_GPIO_MODEL(pin, mode) (mode << (pin * 4))

 /**
  * @brief Create the value to set the GPIO MODEH register
  * @param[in] pin The index of the pin. Valid values are 8..15.
  * @param[in] mode The mode that should be set.
  * @return The value that can be set into the GPIO MODEH register.
  */
 #define GECKO_GPIO_MODEH(pin, mode) (mode << ((pin - 8) * 4))


 #define member_size(type, member) sizeof(((type *)0)->member)
 #define NUMBER_OF_PORTS (member_size(GPIO_TypeDef, P) / \
 			 member_size(GPIO_TypeDef, P[0]))

 struct gpio_gecko_common_config {
 };

 struct gpio_gecko_common_data {
 	/* a list of all ports */
 	struct device *ports[NUMBER_OF_PORTS];
 	size_t count;
 };

 struct gpio_gecko_config {
 	GPIO_P_TypeDef *gpio_base;
 	GPIO_Port_TypeDef gpio_index;
 };

 struct gpio_gecko_data {
 	/* port ISR callback routine address */
 	sys_slist_t callbacks;
 	/* pin callback routine enable flags, by pin number */
 	u32_t pin_callback_enables;
 };

 static inline void gpio_gecko_add_port(struct gpio_gecko_common_data *data,
 				       struct device *dev)
 {
 	__ASSERT(dev, "No port device!");
 	data->ports[data->count++] = dev;
 }


 static int gpio_gecko_configure(struct device *dev,
 				int access_op, u32_t pin, int flags)
 {
 	const struct gpio_gecko_config *config = dev->config->config_info;
 	GPIO_P_TypeDef *gpio_base = config->gpio_base;
 	GPIO_Port_TypeDef gpio_index = config->gpio_index;
 	GPIO_Mode_TypeDef mode;
 	unsigned int out = 0U;

 	/* Check for an invalid pin configuration */
 	if ((flags & GPIO_INT) && (flags & GPIO_DIR_OUT)) {
 		return -EINVAL;
 	}

 	/* Interrupt on static level is not supported by the hardware */
 	if ((flags & GPIO_INT) && !(flags & GPIO_INT_EDGE)) {
 		return -ENOTSUP;
 	}

 	/* Setting interrupt flags for a complete port is not implemented */
 	if ((flags & GPIO_INT) && (access_op == GPIO_ACCESS_BY_PORT)) {
 		return -ENOTSUP;
 	}

 	if ((flags & GPIO_DIR_MASK) == GPIO_DIR_IN) {
 		if ((flags & GPIO_PUD_MASK) == GPIO_PUD_PULL_UP) {
 			mode = gpioModeInputPull;
 			out = 1U; /* pull-up*/
 		} else if ((flags & GPIO_PUD_MASK) == GPIO_PUD_PULL_DOWN) {
 			mode = gpioModeInputPull;
 			/* out = 0 means pull-down*/
 		} else {
 			mode = gpioModeInput;
 		}
 	} else { /* GPIO_DIR_OUT */
 		mode = gpioModePushPull;
 	}
 	/* The flags contain options that require touching registers in the
 	 * GPIO module and the corresponding PORT module.
 	 *
 	 * Start with the GPIO module and set up the pin direction register.
 	 * 0 - pin is input, 1 - pin is output
 	 */

 	if (access_op == GPIO_ACCESS_BY_PIN) {
 		GPIO_PinModeSet(gpio_index, pin, mode, out);
 	} else {	/* GPIO_ACCESS_BY_PORT */
 		gpio_base->MODEL = GECKO_GPIO_MODEL(7, mode)
 			| GECKO_GPIO_MODEL(6, mode) | GECKO_GPIO_MODEL(5, mode)
 			| GECKO_GPIO_MODEL(4, mode) | GECKO_GPIO_MODEL(3, mode)
 			| GECKO_GPIO_MODEL(2, mode) | GECKO_GPIO_MODEL(1, mode)
 			| GECKO_GPIO_MODEL(0, mode);
 		gpio_base->MODEH = GECKO_GPIO_MODEH(15, mode)
 			| GECKO_GPIO_MODEH(14, mode)
 			| GECKO_GPIO_MODEH(13, mode)
 			| GECKO_GPIO_MODEH(12, mode)
 			| GECKO_GPIO_MODEH(11, mode)
 			| GECKO_GPIO_MODEH(10, mode)
 			| GECKO_GPIO_MODEH(9, mode)
 			| GECKO_GPIO_MODEH(8, mode);
 		gpio_base->DOUT = (out ? 0xFFFF : 0x0000);
 	}

 	if (access_op == GPIO_ACCESS_BY_PIN) {
 		GPIO_IntConfig(gpio_index, pin,
 			       (flags & GPIO_INT_ACTIVE_HIGH)
 			       || (flags & GPIO_INT_DOUBLE_EDGE),
 			       !(flags & GPIO_INT_ACTIVE_HIGH)
 			       || (flags & GPIO_INT_DOUBLE_EDGE),
 			       !!(flags & GPIO_INT));
 	}

 	return 0;
 }

 static int gpio_gecko_write(struct device *dev,
 			    int access_op, u32_t pin, u32_t value)
 {
 	const struct gpio_gecko_config *config = dev->config->config_info;
 	GPIO_P_TypeDef *gpio_base = config->gpio_base;

 	if (access_op == GPIO_ACCESS_BY_PIN) {
 		if (value) {
 			/* Set the data output for the corresponding pin.
 			 * Writing zeros to the other bits leaves the data
 			 * output unchanged for the other pins.
 			 */
 			GPIO_PinOutSet(config->gpio_index, pin);
 		} else {
 			/* Clear the data output for the corresponding pin.
 			 * Writing zeros to the other bits leaves the data
 			 * output unchanged for the other pins.
 			 */
 			GPIO_PinOutClear(config->gpio_index, pin);
 		}
 	} else { /* GPIO_ACCESS_BY_PORT */
 		/* Write the data output for all the pins */
 		gpio_base->DOUT = value;
 	}

 	return 0;
 }

 static int gpio_gecko_read(struct device *dev,
 			   int access_op, u32_t pin, u32_t *value)
 {
 	const struct gpio_gecko_config *config = dev->config->config_info;
 	GPIO_P_TypeDef *gpio_base = config->gpio_base;

 	*value = gpio_base->DIN;

 	if (access_op == GPIO_ACCESS_BY_PIN) {
 		*value = (*value & BIT(pin)) >> pin;
 	}

 	/* nothing more to do for GPIO_ACCESS_BY_PORT */

 	return 0;
 }

 static int gpio_gecko_manage_callback(struct device *dev,
 				      struct gpio_callback *callback, bool set)
 {
 	struct gpio_gecko_data *data = dev->driver_data;

 	return gpio_manage_callback(&data->callbacks, callback, set);
 }

 static int gpio_gecko_enable_callback(struct device *dev,
 				      int access_op, u32_t pin)
 {
 	struct gpio_gecko_data *data = dev->driver_data;

 	if (access_op == GPIO_ACCESS_BY_PORT) {
 		return -ENOTSUP;
 	}

 	data->pin_callback_enables |= BIT(pin);
 	GPIO->IEN |= BIT(pin);

 	return 0;
 }

 static int gpio_gecko_disable_callback(struct device *dev,
 				       int access_op, u32_t pin)
 {
 	struct gpio_gecko_data *data = dev->driver_data;

 	if (access_op == GPIO_ACCESS_BY_PORT) {
 		return -ENOTSUP;
 	}

 	data->pin_callback_enables &= ~BIT(pin);
 	GPIO->IEN &= ~BIT(pin);

 	return 0;
 }

 /**
  * Handler for both odd and even pin interrupts
  */
 static void gpio_gecko_common_isr(void *arg)
 {
 	struct device *dev = (struct device *)arg;
 	struct gpio_gecko_common_data *data = dev->driver_data;
 	u32_t enabled_int, int_status;
 	struct device *port_dev;
 	struct gpio_gecko_data *port_data;

 	int_status = GPIO->IF;

 	for (unsigned int i = 0; int_status && (i < data->count); i++) {
 		port_dev = data->ports[i];
 		port_data = port_dev->driver_data;
 		enabled_int = int_status & port_data->pin_callback_enables;
 		int_status &= ~enabled_int;

 		gpio_fire_callbacks(&port_data->callbacks, port_dev,
 				     enabled_int);
 	}
 	/* Clear the pending interrupts */
 	GPIO->IFC = 0xFFFF;
 }


 static const struct gpio_driver_api gpio_gecko_driver_api = {
 	.config = gpio_gecko_configure,
 	.write = gpio_gecko_write,
 	.read = gpio_gecko_read,
 	.manage_callback = gpio_gecko_manage_callback,
 	.enable_callback = gpio_gecko_enable_callback,
 	.disable_callback = gpio_gecko_disable_callback,
 };

 static const struct gpio_driver_api gpio_gecko_common_driver_api = {
 	.manage_callback = gpio_gecko_manage_callback,
 	.enable_callback = gpio_gecko_enable_callback,
 	.disable_callback = gpio_gecko_disable_callback,
 };

 #ifdef CONFIG_GPIO_GECKO
 static int gpio_gecko_common_init(struct device *dev);

 static const struct gpio_gecko_common_config gpio_gecko_common_config = {
 };

 static struct gpio_gecko_common_data gpio_gecko_common_data;

 DEVICE_AND_API_INIT(gpio_gecko_common, DT_GPIO_GECKO_COMMON_NAME,
 		    gpio_gecko_common_init,
 		    &gpio_gecko_common_data, &gpio_gecko_common_config,
 		    POST_KERNEL, CONFIG_GPIO_GECKO_COMMON_INIT_PRIORITY,
 		    &gpio_gecko_common_driver_api);

 static int gpio_gecko_common_init(struct device *dev)
 {
 	/* Serial Wire Output (SWO) pin is controlled by GPIO module, configure
 	 * if enabled.
 	 */
 #if defined(DT_GPIO_GECKO_SWO_LOCATION)
 	struct soc_gpio_pin pin_swo = PIN_SWO;

 #if defined(_GPIO_ROUTEPEN_MASK)
 	/* Enable Serial wire output pin */
 	GPIO->ROUTEPEN |= GPIO_ROUTEPEN_SWVPEN;
 	/* Set SWO location */
 	GPIO->ROUTELOC0 =
 		DT_GPIO_GECKO_SWO_LOCATION << _GPIO_ROUTELOC0_SWVLOC_SHIFT;
 #else
 	GPIO->ROUTE = GPIO_ROUTE_SWOPEN | (DT_GPIO_GECKO_SWO_LOCATION << 8);
 #endif
 	soc_gpio_configure(&pin_swo);
 #endif /* defined(DT_GPIO_GECKO_SWO_LOCATION) */

 	gpio_gecko_common_data.count = 0;
 	IRQ_CONNECT(GPIO_EVEN_IRQn, DT_GPIO_GECKO_COMMON_EVEN_PRI,
 		    gpio_gecko_common_isr, DEVICE_GET(gpio_gecko_common), 0);

 	IRQ_CONNECT(GPIO_ODD_IRQn, DT_GPIO_GECKO_COMMON_ODD_PRI,
 		    gpio_gecko_common_isr, DEVICE_GET(gpio_gecko_common), 0);

 	irq_enable(GPIO_EVEN_IRQn);
 	irq_enable(GPIO_ODD_IRQn);

 	return 0;
 }
 #endif /* CONFIG_GPIO_GECKO */


 #ifdef CONFIG_GPIO_GECKO_PORTA
 static int gpio_gecko_porta_init(struct device *dev);

 static const struct gpio_gecko_config gpio_gecko_porta_config = {
 	.gpio_base = &GPIO->P[gpioPortA],
 	.gpio_index = gpioPortA,
 };

 static struct gpio_gecko_data gpio_gecko_porta_data;

 DEVICE_AND_API_INIT(gpio_gecko_porta, DT_GPIO_GECKO_PORTA_NAME,
 		    gpio_gecko_porta_init,
 		    &gpio_gecko_porta_data, &gpio_gecko_porta_config,
 		    POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
 		    &gpio_gecko_driver_api);

 static int gpio_gecko_porta_init(struct device *dev)
 {
 	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
 	return 0;
 }
 #endif /* CONFIG_GPIO_GECKO_PORTA */

 #ifdef CONFIG_GPIO_GECKO_PORTB
 static int gpio_gecko_portb_init(struct device *dev);

 static const struct gpio_gecko_config gpio_gecko_portb_config = {
 	.gpio_base = &GPIO->P[gpioPortB],
 	.gpio_index = gpioPortB,
 };

 static struct gpio_gecko_data gpio_gecko_portb_data;

 DEVICE_AND_API_INIT(gpio_gecko_portb, DT_GPIO_GECKO_PORTB_NAME,
 		    gpio_gecko_portb_init,
 		    &gpio_gecko_portb_data, &gpio_gecko_portb_config,
 		    POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
 		    &gpio_gecko_driver_api);

 static int gpio_gecko_portb_init(struct device *dev)
 {
 	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
 	return 0;
 }
 #endif /* CONFIG_GPIO_GECKO_PORTB */

 #ifdef CONFIG_GPIO_GECKO_PORTC
 static int gpio_gecko_portc_init(struct device *dev);

 static const struct gpio_gecko_config gpio_gecko_portc_config = {
 	.gpio_base = &GPIO->P[gpioPortC],
 	.gpio_index = gpioPortC,
 };

 static struct gpio_gecko_data gpio_gecko_portc_data;

 DEVICE_AND_API_INIT(gpio_gecko_portc, DT_GPIO_GECKO_PORTC_NAME,
 		    gpio_gecko_portc_init,
 		    &gpio_gecko_portc_data, &gpio_gecko_portc_config,
 		    POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
 		    &gpio_gecko_driver_api);

 static int gpio_gecko_portc_init(struct device *dev)
 {
 	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
 	return 0;
 }
 #endif /* CONFIG_GPIO_GECKO_PORTC */

 #ifdef CONFIG_GPIO_GECKO_PORTD
 static int gpio_gecko_portd_init(struct device *dev);

 static const struct gpio_gecko_config gpio_gecko_portd_config = {
 	.gpio_base = &GPIO->P[gpioPortD],
 	.gpio_index = gpioPortD,
 };

 static struct gpio_gecko_data gpio_gecko_portd_data;

 DEVICE_AND_API_INIT(gpio_gecko_portd, DT_GPIO_GECKO_PORTD_NAME,
 		    gpio_gecko_portd_init,
 		    &gpio_gecko_portd_data, &gpio_gecko_portd_config,
 		    POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
 		    &gpio_gecko_driver_api);

 static int gpio_gecko_portd_init(struct device *dev)
 {
 	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
 	return 0;
 }
 #endif /* CONFIG_GPIO_GECKO_PORTD */

 #ifdef CONFIG_GPIO_GECKO_PORTE
 static int gpio_gecko_porte_init(struct device *dev);

 static const struct gpio_gecko_config gpio_gecko_porte_config = {
 	.gpio_base = &GPIO->P[gpioPortE],
 	.gpio_index = gpioPortE,
 };

 static struct gpio_gecko_data gpio_gecko_porte_data;

 DEVICE_AND_API_INIT(gpio_gecko_porte, DT_GPIO_GECKO_PORTE_NAME,
 		    gpio_gecko_porte_init,
 		    &gpio_gecko_porte_data, &gpio_gecko_porte_config,
 		    POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
 		    &gpio_gecko_driver_api);

 static int gpio_gecko_porte_init(struct device *dev)
 {
 	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
 	return 0;
 }
 #endif /* CONFIG_GPIO_GECKO_PORTE */

 #ifdef CONFIG_GPIO_GECKO_PORTF
 static int gpio_gecko_portf_init(struct device *dev);

 static const struct gpio_gecko_config gpio_gecko_portf_config = {
 	.gpio_base = &GPIO->P[gpioPortF],
 	.gpio_index = gpioPortF,
 };

 static struct gpio_gecko_data gpio_gecko_portf_data;

 DEVICE_AND_API_INIT(gpio_gecko_portf, DT_GPIO_GECKO_PORTF_NAME,
 		    gpio_gecko_portf_init,
 		    &gpio_gecko_portf_data, &gpio_gecko_portf_config,
 		    POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
 		    &gpio_gecko_driver_api);

 static int gpio_gecko_portf_init(struct device *dev)
 {
 	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
 	return 0;
 }
 #endif /* CONFIG_GPIO_GECKO_PORTF */
	/*
	* Copyright (c) 2017, Christian Taedcke
	*
	* SPDX-License-Identifier: Apache-2.0
	*/

	#include <errno.h>
	#include <drivers/gpio.h>
	#include <soc.h>
	#include <em_gpio.h>

	#include "gpio_utils.h"

	/*
	* Macros to set the GPIO MODE registers
	*
	* See https://www.silabs.com/documents/public/reference-manuals/EFM32WG-RM.pdf
	* pages 972 and 982.
	*/
	/**
	* @brief Create the value to set the GPIO MODEL register
	* @param[in] pin The index of the pin. Valid values are 0..7.
	* @param[in] mode The mode that should be set.
	* @return The value that can be set into the GPIO MODEL register.
	*/
	#define GECKO_GPIO_MODEL(pin, mode) (mode << (pin * 4))

	/**
	* @brief Create the value to set the GPIO MODEH register
	* @param[in] pin The index of the pin. Valid values are 8..15.
	* @param[in] mode The mode that should be set.
	* @return The value that can be set into the GPIO MODEH register.
	*/
	#define GECKO_GPIO_MODEH(pin, mode) (mode << ((pin - 8) * 4))


	#define member_size(type, member) sizeof(((type *)0)->member)
	#define NUMBER_OF_PORTS (member_size(GPIO_TypeDef, P) / \
	member_size(GPIO_TypeDef, P[0]))

	struct gpio_gecko_common_config {
	};

	struct gpio_gecko_common_data {
	/* a list of all ports */
	struct device *ports[NUMBER_OF_PORTS];
	size_t count;
	};

	struct gpio_gecko_config {
	GPIO_P_TypeDef *gpio_base;
	GPIO_Port_TypeDef gpio_index;
	};

	struct gpio_gecko_data {
	/* port ISR callback routine address */
	sys_slist_t callbacks;
	/* pin callback routine enable flags, by pin number */
	u32_t pin_callback_enables;
	};

	static inline void gpio_gecko_add_port(struct gpio_gecko_common_data *data,
	struct device *dev)
	{
	__ASSERT(dev, "No port device!");
	data->ports[data->count++] = dev;
	}


	static int gpio_gecko_configure(struct device *dev,
	int access_op, u32_t pin, int flags)
	{
	const struct gpio_gecko_config *config = dev->config->config_info;
	GPIO_P_TypeDef *gpio_base = config->gpio_base;
	GPIO_Port_TypeDef gpio_index = config->gpio_index;
	GPIO_Mode_TypeDef mode;
	unsigned int out = 0U;

	/* Check for an invalid pin configuration */
	if ((flags & GPIO_INT) && (flags & GPIO_DIR_OUT)) {
	return -EINVAL;
	}

	/* Interrupt on static level is not supported by the hardware */
	if ((flags & GPIO_INT) && !(flags & GPIO_INT_EDGE)) {
	return -ENOTSUP;
	}

	/* Setting interrupt flags for a complete port is not implemented */
	if ((flags & GPIO_INT) && (access_op == GPIO_ACCESS_BY_PORT)) {
	return -ENOTSUP;
	}

	if ((flags & GPIO_DIR_MASK) == GPIO_DIR_IN) {
	if ((flags & GPIO_PUD_MASK) == GPIO_PUD_PULL_UP) {
	mode = gpioModeInputPull;
	out = 1U; /* pull-up*/
	} else if ((flags & GPIO_PUD_MASK) == GPIO_PUD_PULL_DOWN) {
	mode = gpioModeInputPull;
	/* out = 0 means pull-down*/
	} else {
	mode = gpioModeInput;
	}
	} else { /* GPIO_DIR_OUT */
	mode = gpioModePushPull;
	}
	/* The flags contain options that require touching registers in the
	* GPIO module and the corresponding PORT module.
	*
	* Start with the GPIO module and set up the pin direction register.
	* 0 - pin is input, 1 - pin is output
	*/

	if (access_op == GPIO_ACCESS_BY_PIN) {
	GPIO_PinModeSet(gpio_index, pin, mode, out);
	} else { /* GPIO_ACCESS_BY_PORT */
	gpio_base->MODEL = GECKO_GPIO_MODEL(7, mode)
	\| GECKO_GPIO_MODEL(6, mode) \| GECKO_GPIO_MODEL(5, mode)
	\| GECKO_GPIO_MODEL(4, mode) \| GECKO_GPIO_MODEL(3, mode)
	\| GECKO_GPIO_MODEL(2, mode) \| GECKO_GPIO_MODEL(1, mode)
	\| GECKO_GPIO_MODEL(0, mode);
	gpio_base->MODEH = GECKO_GPIO_MODEH(15, mode)
	\| GECKO_GPIO_MODEH(14, mode)
	\| GECKO_GPIO_MODEH(13, mode)
	\| GECKO_GPIO_MODEH(12, mode)
	\| GECKO_GPIO_MODEH(11, mode)
	\| GECKO_GPIO_MODEH(10, mode)
	\| GECKO_GPIO_MODEH(9, mode)
	\| GECKO_GPIO_MODEH(8, mode);
	gpio_base->DOUT = (out ? 0xFFFF : 0x0000);
	}

	if (access_op == GPIO_ACCESS_BY_PIN) {
	GPIO_IntConfig(gpio_index, pin,
	(flags & GPIO_INT_ACTIVE_HIGH)
	\|\| (flags & GPIO_INT_DOUBLE_EDGE),
	!(flags & GPIO_INT_ACTIVE_HIGH)
	\|\| (flags & GPIO_INT_DOUBLE_EDGE),
	!!(flags & GPIO_INT));
	}

	return 0;
	}

	static int gpio_gecko_write(struct device *dev,
	int access_op, u32_t pin, u32_t value)
	{
	const struct gpio_gecko_config *config = dev->config->config_info;
	GPIO_P_TypeDef *gpio_base = config->gpio_base;

	if (access_op == GPIO_ACCESS_BY_PIN) {
	if (value) {
	/* Set the data output for the corresponding pin.
	* Writing zeros to the other bits leaves the data
	* output unchanged for the other pins.
	*/
	GPIO_PinOutSet(config->gpio_index, pin);
	} else {
	/* Clear the data output for the corresponding pin.
	* Writing zeros to the other bits leaves the data
	* output unchanged for the other pins.
	*/
	GPIO_PinOutClear(config->gpio_index, pin);
	}
	} else { /* GPIO_ACCESS_BY_PORT */
	/* Write the data output for all the pins */
	gpio_base->DOUT = value;
	}

	return 0;
	}

	static int gpio_gecko_read(struct device *dev,
	int access_op, u32_t pin, u32_t *value)
	{
	const struct gpio_gecko_config *config = dev->config->config_info;
	GPIO_P_TypeDef *gpio_base = config->gpio_base;

	*value = gpio_base->DIN;

	if (access_op == GPIO_ACCESS_BY_PIN) {
	value = (value & BIT(pin)) >> pin;
	}

	/* nothing more to do for GPIO_ACCESS_BY_PORT */

	return 0;
	}

	static int gpio_gecko_manage_callback(struct device *dev,
	struct gpio_callback *callback, bool set)
	{
	struct gpio_gecko_data *data = dev->driver_data;

	return gpio_manage_callback(&data->callbacks, callback, set);
	}

	static int gpio_gecko_enable_callback(struct device *dev,
	int access_op, u32_t pin)
	{
	struct gpio_gecko_data *data = dev->driver_data;

	if (access_op == GPIO_ACCESS_BY_PORT) {
	return -ENOTSUP;
	}

	data->pin_callback_enables \|= BIT(pin);
	GPIO->IEN \|= BIT(pin);

	return 0;
	}

	static int gpio_gecko_disable_callback(struct device *dev,
	int access_op, u32_t pin)
	{
	struct gpio_gecko_data *data = dev->driver_data;

	if (access_op == GPIO_ACCESS_BY_PORT) {
	return -ENOTSUP;
	}

	data->pin_callback_enables &= ~BIT(pin);
	GPIO->IEN &= ~BIT(pin);

	return 0;
	}

	/**
	* Handler for both odd and even pin interrupts
	*/
	static void gpio_gecko_common_isr(void *arg)
	{
	struct device dev = (struct device )arg;
	struct gpio_gecko_common_data *data = dev->driver_data;
	u32_t enabled_int, int_status;
	struct device *port_dev;
	struct gpio_gecko_data *port_data;

	int_status = GPIO->IF;

	for (unsigned int i = 0; int_status && (i < data->count); i++) {
	port_dev = data->ports[i];
	port_data = port_dev->driver_data;
	enabled_int = int_status & port_data->pin_callback_enables;
	int_status &= ~enabled_int;

	gpio_fire_callbacks(&port_data->callbacks, port_dev,
	enabled_int);
	}
	/* Clear the pending interrupts */
	GPIO->IFC = 0xFFFF;
	}


	static const struct gpio_driver_api gpio_gecko_driver_api = {
	.config = gpio_gecko_configure,
	.write = gpio_gecko_write,
	.read = gpio_gecko_read,
	.manage_callback = gpio_gecko_manage_callback,
	.enable_callback = gpio_gecko_enable_callback,
	.disable_callback = gpio_gecko_disable_callback,
	};

	static const struct gpio_driver_api gpio_gecko_common_driver_api = {
	.manage_callback = gpio_gecko_manage_callback,
	.enable_callback = gpio_gecko_enable_callback,
	.disable_callback = gpio_gecko_disable_callback,
	};

	#ifdef CONFIG_GPIO_GECKO
	static int gpio_gecko_common_init(struct device *dev);

	static const struct gpio_gecko_common_config gpio_gecko_common_config = {
	};

	static struct gpio_gecko_common_data gpio_gecko_common_data;

	DEVICE_AND_API_INIT(gpio_gecko_common, DT_GPIO_GECKO_COMMON_NAME,
	gpio_gecko_common_init,
	&gpio_gecko_common_data, &gpio_gecko_common_config,
	POST_KERNEL, CONFIG_GPIO_GECKO_COMMON_INIT_PRIORITY,
	&gpio_gecko_common_driver_api);

	static int gpio_gecko_common_init(struct device *dev)
	{
	/* Serial Wire Output (SWO) pin is controlled by GPIO module, configure
	* if enabled.
	*/
	#if defined(DT_GPIO_GECKO_SWO_LOCATION)
	struct soc_gpio_pin pin_swo = PIN_SWO;

	#if defined(_GPIO_ROUTEPEN_MASK)
	/* Enable Serial wire output pin */
	GPIO->ROUTEPEN \|= GPIO_ROUTEPEN_SWVPEN;
	/* Set SWO location */
	GPIO->ROUTELOC0 =
	DT_GPIO_GECKO_SWO_LOCATION << _GPIO_ROUTELOC0_SWVLOC_SHIFT;
	#else
	GPIO->ROUTE = GPIO_ROUTE_SWOPEN \| (DT_GPIO_GECKO_SWO_LOCATION << 8);
	#endif
	soc_gpio_configure(&pin_swo);
	#endif /* defined(DT_GPIO_GECKO_SWO_LOCATION) */

	gpio_gecko_common_data.count = 0;
	IRQ_CONNECT(GPIO_EVEN_IRQn, DT_GPIO_GECKO_COMMON_EVEN_PRI,
	gpio_gecko_common_isr, DEVICE_GET(gpio_gecko_common), 0);

	IRQ_CONNECT(GPIO_ODD_IRQn, DT_GPIO_GECKO_COMMON_ODD_PRI,
	gpio_gecko_common_isr, DEVICE_GET(gpio_gecko_common), 0);

	irq_enable(GPIO_EVEN_IRQn);
	irq_enable(GPIO_ODD_IRQn);

	return 0;
	}
	#endif /* CONFIG_GPIO_GECKO */


	#ifdef CONFIG_GPIO_GECKO_PORTA
	static int gpio_gecko_porta_init(struct device *dev);

	static const struct gpio_gecko_config gpio_gecko_porta_config = {
	.gpio_base = &GPIO->P[gpioPortA],
	.gpio_index = gpioPortA,
	};

	static struct gpio_gecko_data gpio_gecko_porta_data;

	DEVICE_AND_API_INIT(gpio_gecko_porta, DT_GPIO_GECKO_PORTA_NAME,
	gpio_gecko_porta_init,
	&gpio_gecko_porta_data, &gpio_gecko_porta_config,
	POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
	&gpio_gecko_driver_api);

	static int gpio_gecko_porta_init(struct device *dev)
	{
	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
	return 0;
	}
	#endif /* CONFIG_GPIO_GECKO_PORTA */

	#ifdef CONFIG_GPIO_GECKO_PORTB
	static int gpio_gecko_portb_init(struct device *dev);

	static const struct gpio_gecko_config gpio_gecko_portb_config = {
	.gpio_base = &GPIO->P[gpioPortB],
	.gpio_index = gpioPortB,
	};

	static struct gpio_gecko_data gpio_gecko_portb_data;

	DEVICE_AND_API_INIT(gpio_gecko_portb, DT_GPIO_GECKO_PORTB_NAME,
	gpio_gecko_portb_init,
	&gpio_gecko_portb_data, &gpio_gecko_portb_config,
	POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
	&gpio_gecko_driver_api);

	static int gpio_gecko_portb_init(struct device *dev)
	{
	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
	return 0;
	}
	#endif /* CONFIG_GPIO_GECKO_PORTB */

	#ifdef CONFIG_GPIO_GECKO_PORTC
	static int gpio_gecko_portc_init(struct device *dev);

	static const struct gpio_gecko_config gpio_gecko_portc_config = {
	.gpio_base = &GPIO->P[gpioPortC],
	.gpio_index = gpioPortC,
	};

	static struct gpio_gecko_data gpio_gecko_portc_data;

	DEVICE_AND_API_INIT(gpio_gecko_portc, DT_GPIO_GECKO_PORTC_NAME,
	gpio_gecko_portc_init,
	&gpio_gecko_portc_data, &gpio_gecko_portc_config,
	POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
	&gpio_gecko_driver_api);

	static int gpio_gecko_portc_init(struct device *dev)
	{
	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
	return 0;
	}
	#endif /* CONFIG_GPIO_GECKO_PORTC */

	#ifdef CONFIG_GPIO_GECKO_PORTD
	static int gpio_gecko_portd_init(struct device *dev);

	static const struct gpio_gecko_config gpio_gecko_portd_config = {
	.gpio_base = &GPIO->P[gpioPortD],
	.gpio_index = gpioPortD,
	};

	static struct gpio_gecko_data gpio_gecko_portd_data;

	DEVICE_AND_API_INIT(gpio_gecko_portd, DT_GPIO_GECKO_PORTD_NAME,
	gpio_gecko_portd_init,
	&gpio_gecko_portd_data, &gpio_gecko_portd_config,
	POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
	&gpio_gecko_driver_api);

	static int gpio_gecko_portd_init(struct device *dev)
	{
	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
	return 0;
	}
	#endif /* CONFIG_GPIO_GECKO_PORTD */

	#ifdef CONFIG_GPIO_GECKO_PORTE
	static int gpio_gecko_porte_init(struct device *dev);

	static const struct gpio_gecko_config gpio_gecko_porte_config = {
	.gpio_base = &GPIO->P[gpioPortE],
	.gpio_index = gpioPortE,
	};

	static struct gpio_gecko_data gpio_gecko_porte_data;

	DEVICE_AND_API_INIT(gpio_gecko_porte, DT_GPIO_GECKO_PORTE_NAME,
	gpio_gecko_porte_init,
	&gpio_gecko_porte_data, &gpio_gecko_porte_config,
	POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
	&gpio_gecko_driver_api);

	static int gpio_gecko_porte_init(struct device *dev)
	{
	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
	return 0;
	}
	#endif /* CONFIG_GPIO_GECKO_PORTE */

	#ifdef CONFIG_GPIO_GECKO_PORTF
	static int gpio_gecko_portf_init(struct device *dev);

	static const struct gpio_gecko_config gpio_gecko_portf_config = {
	.gpio_base = &GPIO->P[gpioPortF],
	.gpio_index = gpioPortF,
	};

	static struct gpio_gecko_data gpio_gecko_portf_data;

	DEVICE_AND_API_INIT(gpio_gecko_portf, DT_GPIO_GECKO_PORTF_NAME,
	gpio_gecko_portf_init,
	&gpio_gecko_portf_data, &gpio_gecko_portf_config,
	POST_KERNEL, CONFIG_KERNEL_INIT_PRIORITY_DEFAULT,
	&gpio_gecko_driver_api);

	static int gpio_gecko_portf_init(struct device *dev)
	{
	gpio_gecko_add_port(&gpio_gecko_common_data, dev);
	return 0;
	}
	#endif /* CONFIG_GPIO_GECKO_PORTF */