156 lines
3.4 KiB
C
156 lines
3.4 KiB
C
/*
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* Copyright (c) 2015 Intel Corporation.
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*
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* SPDX-License-Identifier: Apache-2.0
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*/
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#ifndef _RTC_H_
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#define _RTC_H_
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#include <zephyr/types.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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u32_t init_val;
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/*!< enable/disable alarm */
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u8_t alarm_enable;
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/*!< initial configuration value for the 32bit RTC alarm value */
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u32_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 u32_t alarm_val);
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typedef u32_t (*rtc_api_read)(struct device *dev);
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typedef u32_t (*rtc_api_get_pending_int)(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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rtc_api_get_pending_int get_pending_int;
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};
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__syscall u32_t rtc_read(struct device *dev);
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static inline u32_t _impl_rtc_read(struct device *dev)
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{
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const struct rtc_driver_api *api = dev->driver_api;
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return api->read(dev);
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}
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__syscall void rtc_enable(struct device *dev);
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static inline void _impl_rtc_enable(struct device *dev)
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{
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const struct rtc_driver_api *api = dev->driver_api;
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api->enable(dev);
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}
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__syscall void rtc_disable(struct device *dev);
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static inline void _impl_rtc_disable(struct device *dev)
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{
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const struct rtc_driver_api *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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const struct rtc_driver_api *api = dev->driver_api;
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return api->set_config(dev, cfg);
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}
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__syscall int rtc_set_alarm(struct device *dev, const u32_t alarm_val);
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static inline int _impl_rtc_set_alarm(struct device *dev,
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const u32_t alarm_val)
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{
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const struct rtc_driver_api *api = dev->driver_api;
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return api->set_alarm(dev, alarm_val);
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}
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/**
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* @brief Function to get pending interrupts
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*
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* The purpose of this function is to return the interrupt
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* status register for the device.
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* This is especially useful when waking up from
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* low power states to check the wake up source.
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*
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* @param dev Pointer to the device structure for the driver instance.
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*
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* @retval 1 if the rtc interrupt is pending.
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* @retval 0 if no rtc interrupt is pending.
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*/
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__syscall int rtc_get_pending_int(struct device *dev);
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static inline int _impl_rtc_get_pending_int(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->get_pending_int(dev);
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}
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#ifdef __cplusplus
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}
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#endif
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#include <syscalls/rtc.h>
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#endif
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