996a708abd
Add initial support for the GigaDevice External Interrupt Controller. This driver is required to manage GPIO interrupts. Only EXTI lines 0 to 15 are supported for now (no LVD, RTC, etc.). Driver can be extended in the future to add support for extra EXTI lines. Signed-off-by: Gerard Marull-Paretas <gerard@teslabs.com>
69 lines
1.6 KiB
C
69 lines
1.6 KiB
C
/*
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* Copyright (c) 2021 Teslabs Engineering S.L.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef ZEPHYR_INCLUDE_DRIVERS_INTERRUPT_CONTROLLER_GD32_EXTI_H_
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#define ZEPHYR_INCLUDE_DRIVERS_INTERRUPT_CONTROLLER_GD32_EXTI_H_
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#include <stdint.h>
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#include <sys/util_macro.h>
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/**
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* @name EXTI trigger modes.
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* @anchor GD32_EXTI_TRIG
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* @{
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*/
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/** No trigger */
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#define GD32_EXTI_TRIG_NONE 0U
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/** Trigger on rising edge */
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#define GD32_EXTI_TRIG_RISING BIT(0)
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/** Trigger on falling endge */
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#define GD32_EXTI_TRIG_FALLING BIT(1)
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/** Trigger on rising and falling edge */
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#define GD32_EXTI_TRIG_BOTH (GD32_EXTI_TRIG_RISING | GD32_EXTI_TRIG_FALLING)
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/** @} */
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/** Callback for EXTI interrupt. */
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typedef void (*gd32_exti_cb_t)(uint8_t line, void *user);
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/**
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* @brief Enable EXTI interrupt for the given line.
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*
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* @param line EXTI line.
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*/
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void gd32_exti_enable(uint8_t line);
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/**
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* @brief Disable EXTI interrupt for the given line.
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*
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* @param line EXTI line.
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*/
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void gd32_exti_disable(uint8_t line);
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/**
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* @brief Configure EXTI interrupt trigger mode for the given line.
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*
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* @param line EXTI line.
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* @param trigger Trigger mode (see @ref GD32_EXTI_TRIG).
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*/
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void gd32_exti_trigger(uint8_t line, uint8_t trigger);
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/**
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* @brief Configure EXTI interrupt callback.
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*
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* @param line EXTI line.
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* @param cb Callback (NULL to disable).
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* @param user User data (optional).
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*
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* @retval 0 On success.
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* @retval -EALREADY If callback is already set and @p cb is not NULL.
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*/
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int gd32_exti_configure(uint8_t line, gd32_exti_cb_t cb, void *user);
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#endif /* ZEPHYR_INCLUDE_DRIVERS_INTERRUPT_CONTROLLER_GD32_EXTI_H_ */
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