137 lines
3.1 KiB
C
137 lines
3.1 KiB
C
/*
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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 _RTC_H_
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#define _RTC_H_
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#include <stdint.h>
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#include <device.h>
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#include <misc/util.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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enum clk_rtc_div {
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RTC_CLK_DIV_1,
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RTC_CLK_DIV_2,
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RTC_CLK_DIV_4,
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RTC_CLK_DIV_8,
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RTC_CLK_DIV_16,
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RTC_CLK_DIV_32,
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RTC_CLK_DIV_64,
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RTC_CLK_DIV_128,
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RTC_CLK_DIV_256,
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RTC_CLK_DIV_512,
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RTC_CLK_DIV_1024,
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RTC_CLK_DIV_2048,
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RTC_CLK_DIV_4096,
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RTC_CLK_DIV_8192,
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RTC_CLK_DIV_16384,
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RTC_CLK_DIV_32768
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};
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#define RTC_DIVIDER RTC_CLK_DIV_1
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/** Number of RTC ticks in a second */
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#define RTC_ALARM_SECOND (32768 / (1UL << RTC_DIVIDER))
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/** Number of RTC ticks in a minute */
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#define RTC_ALARM_MINUTE (RTC_ALARM_SECOND * 60)
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/** Number of RTC ticks in an hour */
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#define RTC_ALARM_HOUR (RTC_ALARM_MINUTE * 60)
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/** Number of RTC ticks in a day */
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#define RTC_ALARM_DAY (RTC_ALARM_HOUR * 24)
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struct rtc_config {
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uint32_t init_val;
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/*!< enable/disable alarm */
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uint8_t alarm_enable;
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/*!< initial configuration value for the 32bit RTC alarm value */
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uint32_t alarm_val;
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/*!< Pointer to function to call when alarm value
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* matches current RTC value */
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void (*cb_fn)(struct device *dev);
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};
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typedef void (*rtc_api_enable)(struct device *dev);
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typedef void (*rtc_api_disable)(struct device *dev);
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typedef int (*rtc_api_set_config)(struct device *dev,
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struct rtc_config *config);
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typedef int (*rtc_api_set_alarm)(struct device *dev,
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const uint32_t alarm_val);
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typedef uint32_t (*rtc_api_read)(struct device *dev);
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struct rtc_driver_api {
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rtc_api_enable enable;
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rtc_api_disable disable;
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rtc_api_read read;
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rtc_api_set_config set_config;
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rtc_api_set_alarm set_alarm;
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};
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static inline uint32_t rtc_read(struct device *dev)
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{
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struct rtc_driver_api *api;
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api = (struct rtc_driver_api *)dev->driver_api;
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return api->read(dev);
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}
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static inline void rtc_enable(struct device *dev)
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{
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struct rtc_driver_api *api;
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api = (struct rtc_driver_api *)dev->driver_api;
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api->enable(dev);
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}
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static inline void rtc_disable(struct device *dev)
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{
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struct rtc_driver_api *api;
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api = (struct rtc_driver_api *)dev->driver_api;
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api->disable(dev);
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}
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static inline int rtc_set_config(struct device *dev,
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struct rtc_config *cfg)
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{
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struct rtc_driver_api *api;
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api = (struct rtc_driver_api *)dev->driver_api;
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return api->set_config(dev, cfg);
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}
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static inline int rtc_set_alarm(struct device *dev,
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const uint32_t alarm_val)
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{
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struct rtc_driver_api *api;
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api = (struct rtc_driver_api *)dev->driver_api;
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return api->set_alarm(dev, alarm_val);
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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