2f3c43251f
Some drivers masked the set of signaled pins based on enabled interrupts, some did not. For those that did not the 2-pin test could fail. The documentation does not imply that pins unrelated to the callback participate in the notification process, so do the filtering in the generic callback loop. Signed-off-by: Peter Bigot <peter.bigot@nordicsemi.no>
68 lines
1.7 KiB
C
68 lines
1.7 KiB
C
/*
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* Copyright (c) 2016 Intel Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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/**
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* @file Header where utility code can be found for GPIO drivers
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*/
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#ifndef ZEPHYR_DRIVERS_GPIO_GPIO_UTILS_H_
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#define ZEPHYR_DRIVERS_GPIO_GPIO_UTILS_H_
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/**
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* @brief Generic function to insert or remove a callback from a callback list
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*
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* @param callbacks A pointer to the original list of callbacks (can be NULL)
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* @param callback A pointer of the callback to insert or remove from the list
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* @param set A boolean indicating insertion or removal of the callback
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*
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* @return 0 on success, negative errno otherwise.
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*/
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static inline int gpio_manage_callback(sys_slist_t *callbacks,
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struct gpio_callback *callback,
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bool set)
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{
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__ASSERT(callback, "No callback!");
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__ASSERT(callback->handler, "No callback handler!");
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if (!sys_slist_is_empty(callbacks)) {
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if (!sys_slist_find_and_remove(callbacks, &callback->node)) {
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if (!set) {
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return -EINVAL;
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}
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}
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}
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if (set) {
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sys_slist_prepend(callbacks, &callback->node);
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}
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return 0;
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}
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/**
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* @brief Generic function to go through and fire callback from a callback list
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*
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* @param list A pointer on the gpio callback list
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* @param port A pointer on the gpio driver instance
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* @param pins The actual pin mask that triggered the interrupt
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*/
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static inline void gpio_fire_callbacks(sys_slist_t *list,
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struct device *port,
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u32_t pins)
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{
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struct gpio_callback *cb, *tmp;
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SYS_SLIST_FOR_EACH_CONTAINER_SAFE(list, cb, tmp, node) {
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if (cb->pin_mask & pins) {
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__ASSERT(cb->handler, "No callback handler!");
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cb->handler(port, cb, cb->pin_mask & pins);
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}
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}
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}
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#endif /* ZEPHYR_DRIVERS_GPIO_GPIO_UTILS_H_ */
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