88 lines
2.5 KiB
C
88 lines
2.5 KiB
C
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/*
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* Copyright (c) 2015 Intel Corporation.
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef _AIO_COMPARATOR_H_
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#define _AIO_COMPARATOR_H_
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enum aio_cmp_ref {
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AIO_CMP_REF_A, /**< Use reference A. */
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AIO_CMP_REF_B, /**< Use reference B. */
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};
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enum aio_cmp_polarity {
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AIO_CMP_POL_RISE, /**< Match on rising edge. */
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AIO_CMP_POL_FALL, /**< Match on falling edge. */
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};
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typedef void (*aio_cmp_cb)(void *);
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typedef int (*aio_cmp_api_disable)(struct device *dev, uint8_t index);
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typedef int (*aio_cmp_api_configure)(struct device *dev, uint8_t index,
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enum aio_cmp_polarity polarity, enum aio_cmp_ref refsel,
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aio_cmp_cb cb, void *param);
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struct aio_cmp_driver_api {
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aio_cmp_api_disable disable;
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aio_cmp_api_configure configure;
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};
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/**
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* @brief Disable a particular comparator.
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*
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* This disables a comparator so that it no longer triggers interrupts.
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*
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* @param dev Device struct
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* @param index The index of the comparator to disable
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*
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* @return 0 if successful, otherwise failed.
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*/
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static inline int aio_cmp_disable(struct device *dev, uint8_t index)
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{
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struct aio_cmp_driver_api *api;
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api = (struct aio_cmp_driver_api *)dev->driver_api;
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return api->disable(dev, index);
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}
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/**
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* @brief Configure and enable a particular comparator.
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*
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* This performs configuration and enable a comparator, so that it will
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* generate interrupts when conditions are met.
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*
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* @param dev Device struct
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* @param index The index of the comparator to disable
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* @param polarity Match polarity (e.g. rising or falling)
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* @param refsel Reference for trigger
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* @param cb Function callback (aio_cmp_cb)
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* @param param Parameters to be passed to callback
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*
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* @return 0 if successful, otherwise failed.
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*/
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static inline int aio_cmp_configure(struct device *dev, uint8_t index,
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enum aio_cmp_polarity polarity,
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enum aio_cmp_ref refsel,
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aio_cmp_cb cb, void *param)
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{
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struct aio_cmp_driver_api *api;
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api = (struct aio_cmp_driver_api *)dev->driver_api;
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return api->configure(dev, index, polarity, refsel, cb, param);
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}
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#endif /* _AIO_COMPARATOR_H_ */
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