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/*
* Copyright (c) 2015 Intel Corporation.
*
* SPDX-License-Identifier: Apache-2.0
*/
#ifndef _RTC_H_
#define _RTC_H_
#include <zephyr/types.h>
#include <device.h>
#include <misc/util.h>
#ifdef __cplusplus
extern "C" {
#endif
enum clk_rtc_div {
RTC_CLK_DIV_1,
RTC_CLK_DIV_2,
RTC_CLK_DIV_4,
RTC_CLK_DIV_8,
RTC_CLK_DIV_16,
RTC_CLK_DIV_32,
RTC_CLK_DIV_64,
RTC_CLK_DIV_128,
RTC_CLK_DIV_256,
RTC_CLK_DIV_512,
RTC_CLK_DIV_1024,
RTC_CLK_DIV_2048,
RTC_CLK_DIV_4096,
RTC_CLK_DIV_8192,
RTC_CLK_DIV_16384,
RTC_CLK_DIV_32768
};
#define RTC_DIVIDER RTC_CLK_DIV_1
/** Number of RTC ticks in a second */
#define RTC_ALARM_SECOND (32768 / (1UL << RTC_DIVIDER))
/** Number of RTC ticks in a minute */
#define RTC_ALARM_MINUTE (RTC_ALARM_SECOND * 60)
/** Number of RTC ticks in an hour */
#define RTC_ALARM_HOUR (RTC_ALARM_MINUTE * 60)
/** Number of RTC ticks in a day */
#define RTC_ALARM_DAY (RTC_ALARM_HOUR * 24)
struct rtc_config {
u32_t init_val;
/*!< enable/disable alarm */
u8_t alarm_enable;
/*!< initial configuration value for the 32bit RTC alarm value */
u32_t alarm_val;
/*!< Pointer to function to call when alarm value
* matches current RTC value */
void (*cb_fn)(struct device *dev);
};
typedef void (*rtc_api_enable)(struct device *dev);
typedef void (*rtc_api_disable)(struct device *dev);
typedef int (*rtc_api_set_config)(struct device *dev,
struct rtc_config *config);
typedef int (*rtc_api_set_alarm)(struct device *dev,
const u32_t alarm_val);
typedef u32_t (*rtc_api_read)(struct device *dev);
typedef u32_t (*rtc_api_get_pending_int)(struct device *dev);
struct rtc_driver_api {
rtc_api_enable enable;
rtc_api_disable disable;
rtc_api_read read;
rtc_api_set_config set_config;
rtc_api_set_alarm set_alarm;
rtc_api_get_pending_int get_pending_int;
};
static inline u32_t rtc_read(struct device *dev)
{
const struct rtc_driver_api *api = dev->driver_api;
return api->read(dev);
}
static inline void rtc_enable(struct device *dev)
{
const struct rtc_driver_api *api = dev->driver_api;
api->enable(dev);
}
static inline void rtc_disable(struct device *dev)
{
const struct rtc_driver_api *api = dev->driver_api;
api->disable(dev);
}
static inline int rtc_set_config(struct device *dev,
struct rtc_config *cfg)
{
const struct rtc_driver_api *api = dev->driver_api;
return api->set_config(dev, cfg);
}
static inline int rtc_set_alarm(struct device *dev,
const u32_t alarm_val)
{
const struct rtc_driver_api *api = dev->driver_api;
return api->set_alarm(dev, alarm_val);
}
/**
* @brief Function to get pending interrupts
*
* The purpose of this function is to return the interrupt
* status register for the device.
* This is especially useful when waking up from
* low power states to check the wake up source.
*
* @param dev Pointer to the device structure for the driver instance.
*
* @retval 1 if the rtc interrupt is pending.
* @retval 0 if no rtc interrupt is pending.
*/
static inline int rtc_get_pending_int(struct device *dev)
{
struct rtc_driver_api *api;
api = (struct rtc_driver_api *)dev->driver_api;
return api->get_pending_int(dev);
}
#ifdef __cplusplus
}
#endif
#endif
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