318 lines
8.2 KiB
C
318 lines
8.2 KiB
C
/*
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* Copyright (c) 2016 Freescale Semiconductor, Inc.
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* Copyright (c) 2017, NXP
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#define DT_DRV_COMPAT nxp_kinetis_gpio
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#include <errno.h>
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#include <device.h>
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#include <drivers/gpio.h>
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#include <soc.h>
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#include <fsl_common.h>
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#include <fsl_port.h>
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#include "gpio_utils.h"
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struct gpio_mcux_config {
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/* gpio_driver_config needs to be first */
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struct gpio_driver_config common;
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GPIO_Type *gpio_base;
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PORT_Type *port_base;
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unsigned int flags;
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};
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struct gpio_mcux_data {
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/* gpio_driver_data needs to be first */
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struct gpio_driver_data common;
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/* port ISR callback routine address */
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sys_slist_t callbacks;
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};
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static int gpio_mcux_configure(const struct device *dev,
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gpio_pin_t pin, gpio_flags_t flags)
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{
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const struct gpio_mcux_config *config = dev->config;
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GPIO_Type *gpio_base = config->gpio_base;
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PORT_Type *port_base = config->port_base;
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uint32_t mask = 0U;
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uint32_t pcr = 0U;
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/* Check for an invalid pin number */
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if (pin >= ARRAY_SIZE(port_base->PCR)) {
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return -EINVAL;
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}
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if (((flags & GPIO_INPUT) != 0) && ((flags & GPIO_OUTPUT) != 0)) {
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return -ENOTSUP;
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}
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if ((flags & GPIO_SINGLE_ENDED) != 0) {
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return -ENOTSUP;
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}
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/* The flags contain options that require touching registers in the
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* GPIO module and the corresponding PORT module.
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*
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* Start with the GPIO module and set up the pin direction register.
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* 0 - pin is input, 1 - pin is output
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*/
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switch (flags & GPIO_DIR_MASK) {
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case GPIO_INPUT:
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gpio_base->PDDR &= ~BIT(pin);
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break;
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case GPIO_OUTPUT:
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if ((flags & GPIO_OUTPUT_INIT_HIGH) != 0) {
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gpio_base->PSOR = BIT(pin);
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} else if ((flags & GPIO_OUTPUT_INIT_LOW) != 0) {
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gpio_base->PCOR = BIT(pin);
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}
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gpio_base->PDDR |= BIT(pin);
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break;
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default:
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return -ENOTSUP;
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}
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/* Set PCR mux to GPIO for the pin we are configuring */
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mask |= PORT_PCR_MUX_MASK;
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pcr |= PORT_PCR_MUX(kPORT_MuxAsGpio);
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/* Now do the PORT module. Figure out the pullup/pulldown
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* configuration, but don't write it to the PCR register yet.
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*/
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mask |= PORT_PCR_PE_MASK | PORT_PCR_PS_MASK;
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if ((flags & GPIO_PULL_UP) != 0) {
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/* Enable the pull and select the pullup resistor. */
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pcr |= PORT_PCR_PE_MASK | PORT_PCR_PS_MASK;
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} else if ((flags & GPIO_PULL_DOWN) != 0) {
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/* Enable the pull and select the pulldown resistor (deselect
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* the pullup resistor.
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*/
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pcr |= PORT_PCR_PE_MASK;
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}
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#if defined(FSL_FEATURE_PORT_HAS_DRIVE_STRENGTH) && FSL_FEATURE_PORT_HAS_DRIVE_STRENGTH
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/* Determine the drive strength */
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switch (flags & GPIO_DS_MASK) {
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case GPIO_DS_DFLT:
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/* Default is low drive strength */
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mask |= PORT_PCR_DSE_MASK;
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break;
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case GPIO_DS_ALT:
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/* Alternate is high drive strength */
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pcr |= PORT_PCR_DSE_MASK;
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break;
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default:
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return -ENOTSUP;
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}
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#endif /* defined(FSL_FEATURE_PORT_HAS_DRIVE_STRENGTH) && FSL_FEATURE_PORT_HAS_DRIVE_STRENGTH */
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/* Accessing by pin, we only need to write one PCR register. */
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port_base->PCR[pin] = (port_base->PCR[pin] & ~mask) | pcr;
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return 0;
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}
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static int gpio_mcux_port_get_raw(const struct device *dev, uint32_t *value)
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{
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const struct gpio_mcux_config *config = dev->config;
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GPIO_Type *gpio_base = config->gpio_base;
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*value = gpio_base->PDIR;
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return 0;
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}
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static int gpio_mcux_port_set_masked_raw(const struct device *dev,
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uint32_t mask,
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uint32_t value)
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{
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const struct gpio_mcux_config *config = dev->config;
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GPIO_Type *gpio_base = config->gpio_base;
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gpio_base->PDOR = (gpio_base->PDOR & ~mask) | (mask & value);
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return 0;
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}
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static int gpio_mcux_port_set_bits_raw(const struct device *dev,
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uint32_t mask)
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{
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const struct gpio_mcux_config *config = dev->config;
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GPIO_Type *gpio_base = config->gpio_base;
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gpio_base->PSOR = mask;
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return 0;
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}
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static int gpio_mcux_port_clear_bits_raw(const struct device *dev,
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uint32_t mask)
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{
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const struct gpio_mcux_config *config = dev->config;
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GPIO_Type *gpio_base = config->gpio_base;
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gpio_base->PCOR = mask;
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return 0;
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}
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static int gpio_mcux_port_toggle_bits(const struct device *dev, uint32_t mask)
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{
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const struct gpio_mcux_config *config = dev->config;
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GPIO_Type *gpio_base = config->gpio_base;
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gpio_base->PTOR = mask;
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return 0;
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}
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static uint32_t get_port_pcr_irqc_value_from_flags(const struct device *dev,
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uint32_t pin,
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enum gpio_int_mode mode,
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enum gpio_int_trig trig)
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{
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port_interrupt_t port_interrupt = 0;
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if (mode == GPIO_INT_MODE_DISABLED) {
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port_interrupt = kPORT_InterruptOrDMADisabled;
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} else {
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if (mode == GPIO_INT_MODE_LEVEL) {
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if (trig == GPIO_INT_TRIG_LOW) {
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port_interrupt = kPORT_InterruptLogicZero;
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} else {
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port_interrupt = kPORT_InterruptLogicOne;
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}
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} else {
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switch (trig) {
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case GPIO_INT_TRIG_LOW:
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port_interrupt = kPORT_InterruptFallingEdge;
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break;
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case GPIO_INT_TRIG_HIGH:
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port_interrupt = kPORT_InterruptRisingEdge;
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break;
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case GPIO_INT_TRIG_BOTH:
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port_interrupt = kPORT_InterruptEitherEdge;
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break;
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}
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}
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}
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return PORT_PCR_IRQC(port_interrupt);
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}
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static int gpio_mcux_pin_interrupt_configure(const struct device *dev,
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gpio_pin_t pin, enum gpio_int_mode mode,
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enum gpio_int_trig trig)
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{
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const struct gpio_mcux_config *config = dev->config;
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GPIO_Type *gpio_base = config->gpio_base;
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PORT_Type *port_base = config->port_base;
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/* Check for an invalid pin number */
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if (pin >= ARRAY_SIZE(port_base->PCR)) {
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return -EINVAL;
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}
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/* Check for an invalid pin configuration */
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if ((mode != GPIO_INT_MODE_DISABLED) &&
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((gpio_base->PDDR & BIT(pin)) != 0)) {
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return -EINVAL;
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}
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/* Check if GPIO port supports interrupts */
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if ((mode != GPIO_INT_MODE_DISABLED) &&
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((config->flags & GPIO_INT_ENABLE) == 0U)) {
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return -ENOTSUP;
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}
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uint32_t pcr = get_port_pcr_irqc_value_from_flags(dev, pin, mode, trig);
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port_base->PCR[pin] = (port_base->PCR[pin] & ~PORT_PCR_IRQC_MASK) | pcr;
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return 0;
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}
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static int gpio_mcux_manage_callback(const struct device *dev,
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struct gpio_callback *callback, bool set)
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{
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struct gpio_mcux_data *data = dev->data;
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return gpio_manage_callback(&data->callbacks, callback, set);
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}
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static void gpio_mcux_port_isr(const struct device *dev)
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{
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const struct gpio_mcux_config *config = dev->config;
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struct gpio_mcux_data *data = dev->data;
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uint32_t int_status;
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int_status = config->port_base->ISFR;
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/* Clear the port interrupts */
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config->port_base->ISFR = int_status;
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gpio_fire_callbacks(&data->callbacks, dev, int_status);
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}
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static const struct gpio_driver_api gpio_mcux_driver_api = {
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.pin_configure = gpio_mcux_configure,
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.port_get_raw = gpio_mcux_port_get_raw,
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.port_set_masked_raw = gpio_mcux_port_set_masked_raw,
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.port_set_bits_raw = gpio_mcux_port_set_bits_raw,
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.port_clear_bits_raw = gpio_mcux_port_clear_bits_raw,
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.port_toggle_bits = gpio_mcux_port_toggle_bits,
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.pin_interrupt_configure = gpio_mcux_pin_interrupt_configure,
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.manage_callback = gpio_mcux_manage_callback,
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};
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#define GPIO_MCUX_IRQ_INIT(n) \
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do { \
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IRQ_CONNECT(DT_INST_IRQN(n), \
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DT_INST_IRQ(n, priority), \
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gpio_mcux_port_isr, \
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DEVICE_DT_INST_GET(n), 0); \
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\
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irq_enable(DT_INST_IRQN(n)); \
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} while (0)
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#define GPIO_PORT_BASE_ADDR(n) DT_REG_ADDR(DT_INST_PHANDLE(n, nxp_kinetis_port))
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#define GPIO_DEVICE_INIT_MCUX(n) \
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static int gpio_mcux_port## n ## _init(const struct device *dev); \
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\
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static const struct gpio_mcux_config gpio_mcux_port## n ## _config = {\
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.common = { \
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.port_pin_mask = GPIO_PORT_PIN_MASK_FROM_DT_INST(n),\
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}, \
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.gpio_base = (GPIO_Type *) DT_INST_REG_ADDR(n), \
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.port_base = (PORT_Type *) GPIO_PORT_BASE_ADDR(n), \
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.flags = UTIL_AND(DT_INST_IRQ_HAS_IDX(n, 0), GPIO_INT_ENABLE),\
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}; \
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\
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static struct gpio_mcux_data gpio_mcux_port## n ##_data; \
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\
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DEVICE_DT_INST_DEFINE(n, \
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gpio_mcux_port## n ##_init, \
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NULL, \
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&gpio_mcux_port## n ##_data, \
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&gpio_mcux_port## n##_config, \
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POST_KERNEL, \
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CONFIG_GPIO_INIT_PRIORITY, \
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&gpio_mcux_driver_api); \
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\
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static int gpio_mcux_port## n ##_init(const struct device *dev) \
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{ \
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IF_ENABLED(DT_INST_IRQ_HAS_IDX(n, 0), \
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(GPIO_MCUX_IRQ_INIT(n);)) \
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return 0; \
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}
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DT_INST_FOREACH_STATUS_OKAY(GPIO_DEVICE_INIT_MCUX)
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