blob: 18cafe1272da47b5b73c01a492d71802405ab58f [file] [log] [blame] [edit]
/*
* Copyright 2021-22, NXP
*
* SPDX-License-Identifier: Apache-2.0
*/
#define DT_DRV_COMPAT nxp_lpc_rtc
#include <zephyr/drivers/counter.h>
#include <zephyr/irq.h>
#include <fsl_rtc.h>
#include "fsl_power.h"
#include <zephyr/logging/log.h>
LOG_MODULE_REGISTER(mcux_rtc, CONFIG_COUNTER_LOG_LEVEL);
struct mcux_lpc_rtc_data {
counter_alarm_callback_t alarm_callback;
counter_top_callback_t top_callback;
void *alarm_user_data;
void *top_user_data;
};
struct mcux_lpc_rtc_config {
struct counter_config_info info;
RTC_Type *base;
void (*irq_config_func)(const struct device *dev);
/* Device defined as wake-up source */
bool wakeup_source;
};
static int mcux_lpc_rtc_start(const struct device *dev)
{
const struct counter_config_info *info = dev->config;
const struct mcux_lpc_rtc_config *config =
CONTAINER_OF(info, struct mcux_lpc_rtc_config, info);
RTC_StartTimer(config->base);
return 0;
}
static int mcux_lpc_rtc_stop(const struct device *dev)
{
const struct counter_config_info *info = dev->config;
const struct mcux_lpc_rtc_config *config =
CONTAINER_OF(info, struct mcux_lpc_rtc_config, info);
RTC_StopTimer(config->base);
/* clear out any set alarms */
RTC_SetSecondsTimerMatch(config->base, 0);
return 0;
}
static uint32_t mcux_lpc_rtc_read(const struct device *dev)
{
const struct counter_config_info *info = dev->config;
const struct mcux_lpc_rtc_config *config =
CONTAINER_OF(info, struct mcux_lpc_rtc_config, info);
uint32_t ticks = RTC_GetSecondsTimerCount(config->base);
return ticks;
}
static int mcux_lpc_rtc_get_value(const struct device *dev, uint32_t *ticks)
{
*ticks = mcux_lpc_rtc_read(dev);
return 0;
}
static int mcux_lpc_rtc_set_alarm(const struct device *dev, uint8_t chan_id,
const struct counter_alarm_cfg *alarm_cfg)
{
const struct counter_config_info *info = dev->config;
const struct mcux_lpc_rtc_config *config =
CONTAINER_OF(info, struct mcux_lpc_rtc_config, info);
struct mcux_lpc_rtc_data *data = dev->data;
uint32_t ticks = alarm_cfg->ticks;
uint32_t current = mcux_lpc_rtc_read(dev);
LOG_DBG("Current time is %d ticks", current);
if (chan_id != 0U) {
LOG_ERR("Invalid channel id");
return -EINVAL;
}
if (data->alarm_callback != NULL) {
return -EBUSY;
}
if ((alarm_cfg->flags & COUNTER_ALARM_CFG_ABSOLUTE) == 0) {
ticks += current;
}
if (ticks < current) {
LOG_ERR("Alarm cannot be earlier than current time");
return -EINVAL;
}
data->alarm_callback = alarm_cfg->callback;
data->alarm_user_data = alarm_cfg->user_data;
RTC_SetSecondsTimerMatch(config->base, ticks);
LOG_DBG("Alarm set to %d ticks", ticks);
return 0;
}
static int mcux_lpc_rtc_cancel_alarm(const struct device *dev, uint8_t chan_id)
{
struct mcux_lpc_rtc_data *data = dev->data;
if (chan_id != 0U) {
LOG_ERR("Invalid channel id");
return -EINVAL;
}
data->alarm_callback = NULL;
return 0;
}
static int mcux_lpc_rtc_set_top_value(const struct device *dev,
const struct counter_top_cfg *cfg)
{
const struct counter_config_info *info = dev->config;
const struct mcux_lpc_rtc_config *config =
CONTAINER_OF(info, struct mcux_lpc_rtc_config, info);
struct mcux_lpc_rtc_data *data = dev->data;
if (cfg->ticks != info->max_top_value) {
LOG_ERR("Wrap can only be set to 0x%x.", info->max_top_value);
return -ENOTSUP;
}
if (!(cfg->flags & COUNTER_TOP_CFG_DONT_RESET)) {
RTC_StopTimer(config->base);
RTC_SetSecondsTimerCount(config->base, 0);
RTC_StartTimer(config->base);
}
data->top_callback = cfg->callback;
data->top_user_data = cfg->user_data;
return 0;
}
static uint32_t mcux_lpc_rtc_get_pending_int(const struct device *dev)
{
const struct counter_config_info *info = dev->config;
const struct mcux_lpc_rtc_config *config =
CONTAINER_OF(info, struct mcux_lpc_rtc_config, info);
return RTC_GetStatusFlags(config->base) & RTC_CTRL_ALARM1HZ_MASK;
}
static uint32_t mcux_lpc_rtc_get_top_value(const struct device *dev)
{
const struct counter_config_info *info = dev->config;
return info->max_top_value;
}
static void mcux_lpc_rtc_isr(const struct device *dev)
{
const struct counter_config_info *info = dev->config;
const struct mcux_lpc_rtc_config *config =
CONTAINER_OF(info, struct mcux_lpc_rtc_config, info);
struct mcux_lpc_rtc_data *data = dev->data;
counter_alarm_callback_t cb;
uint32_t current = mcux_lpc_rtc_read(dev);
LOG_DBG("Current time is %d ticks", current);
if ((RTC_GetStatusFlags(config->base) & RTC_CTRL_ALARM1HZ_MASK) &&
(data->alarm_callback)) {
cb = data->alarm_callback;
data->alarm_callback = NULL;
cb(dev, 0, current, data->alarm_user_data);
}
if (data->top_callback) {
data->top_callback(dev, data->top_user_data);
}
/*
* Clear any conditions to ack the IRQ
*
* callback may have already reset the alarm flag if a new
* alarm value was programmed to the TAR
*/
RTC_StopTimer(config->base);
if (RTC_GetStatusFlags(config->base) & RTC_CTRL_ALARM1HZ_MASK) {
RTC_ClearStatusFlags(config->base, kRTC_AlarmFlag);
}
RTC_StartTimer(config->base);
}
static int mcux_lpc_rtc_init(const struct device *dev)
{
const struct counter_config_info *info = dev->config;
const struct mcux_lpc_rtc_config *config =
CONTAINER_OF(info, struct mcux_lpc_rtc_config, info);
RTC_Init(config->base);
config->irq_config_func(dev);
if (config->wakeup_source) {
/* Enable the bit to wakeup from Deep Power Down mode */
RTC_EnableAlarmTimerInterruptFromDPD(config->base, true);
}
return 0;
}
static const struct counter_driver_api mcux_rtc_driver_api = {
.start = mcux_lpc_rtc_start,
.stop = mcux_lpc_rtc_stop,
.get_value = mcux_lpc_rtc_get_value,
.set_alarm = mcux_lpc_rtc_set_alarm,
.cancel_alarm = mcux_lpc_rtc_cancel_alarm,
.set_top_value = mcux_lpc_rtc_set_top_value,
.get_pending_int = mcux_lpc_rtc_get_pending_int,
.get_top_value = mcux_lpc_rtc_get_top_value,
};
#define COUNTER_LPC_RTC_DEVICE(id) \
static void mcux_lpc_rtc_irq_config_##id(const struct device *dev); \
static const struct mcux_lpc_rtc_config mcux_lpc_rtc_config_##id = { \
.base = (RTC_Type *)DT_INST_REG_ADDR(id), \
.irq_config_func = mcux_lpc_rtc_irq_config_##id, \
.info = { \
.max_top_value = UINT32_MAX, \
.freq = 1, \
.flags = COUNTER_CONFIG_INFO_COUNT_UP, \
.channels = 1, \
}, \
.wakeup_source = DT_INST_PROP(id, wakeup_source) \
}; \
static struct mcux_lpc_rtc_data mcux_lpc_rtc_data_##id; \
DEVICE_DT_INST_DEFINE(id, &mcux_lpc_rtc_init, NULL, \
&mcux_lpc_rtc_data_##id, &mcux_lpc_rtc_config_##id.info, \
POST_KERNEL, CONFIG_COUNTER_INIT_PRIORITY, \
&mcux_rtc_driver_api); \
static void mcux_lpc_rtc_irq_config_##id(const struct device *dev) \
{ \
IRQ_CONNECT(DT_INST_IRQN(id), \
DT_INST_IRQ(id, priority), \
mcux_lpc_rtc_isr, DEVICE_DT_INST_GET(id), 0); \
irq_enable(DT_INST_IRQN(id)); \
if (DT_INST_PROP(id, wakeup_source)) { \
EnableDeepSleepIRQ(DT_INST_IRQN(id)); \
} \
}
DT_INST_FOREACH_STATUS_OKAY(COUNTER_LPC_RTC_DEVICE)