blob: af35564a158756d807694ac73a9be1b5f51655a4 [file] [log] [blame] [edit]
/*
* Copyright (c) 2018, Nordic Semiconductor ASA
*
* SPDX-License-Identifier: Apache-2.0
*/
#include <zephyr/drivers/counter.h>
#include <hal/nrf_rtc.h>
#ifdef CONFIG_CLOCK_CONTROL_NRF
#include <zephyr/drivers/clock_control.h>
#include <zephyr/drivers/clock_control/nrf_clock_control.h>
#endif
#include <zephyr/sys/atomic.h>
#ifdef DPPI_PRESENT
#include <nrfx_dppi.h>
#else
#include <nrfx_ppi.h>
#endif
#define LOG_MODULE_NAME counter_rtc
#include <zephyr/logging/log.h>
#include <zephyr/irq.h>
LOG_MODULE_REGISTER(LOG_MODULE_NAME, CONFIG_COUNTER_LOG_LEVEL);
#define ERR(...) LOG_INST_ERR( \
((const struct counter_nrfx_config *)dev->config)->log, __VA_ARGS__)
#define WRN(...) LOG_INST_WRN( \
((const struct counter_nrfx_config *)dev->config)->log, __VA_ARGS__)
#define INF(...) LOG_INST_INF( \
((const struct counter_nrfx_config *)dev->config)->log, __VA_ARGS__)
#define DBG(...) LOG_INST_DBG( \
((const struct counter_nrfx_config *)dev->config)->log, __VA_ARGS__)
#define DT_DRV_COMPAT nordic_nrf_rtc
#define COUNTER_GET_TOP_CH(dev) counter_get_num_of_channels(dev)
#define IS_FIXED_TOP(dev) COND_CODE_1(CONFIG_COUNTER_RTC_CUSTOM_TOP_SUPPORT, \
(((const struct counter_nrfx_config *)dev->config)->fixed_top), (true))
#define IS_PPI_WRAP(dev) COND_CODE_1(CONFIG_COUNTER_RTC_WITH_PPI_WRAP, \
(((const struct counter_nrfx_config *)dev->config)->use_ppi), (false))
#define CC_ADJUSTED_OFFSET 16
#define CC_ADJ_MASK(chan) (BIT(chan + CC_ADJUSTED_OFFSET))
struct counter_nrfx_data {
counter_top_callback_t top_cb;
void *top_user_data;
uint32_t top;
uint32_t guard_period;
/* Store channel interrupt pending and CC adjusted flags. */
atomic_t ipend_adj;
#if CONFIG_COUNTER_RTC_WITH_PPI_WRAP
uint8_t ppi_ch;
#endif
};
struct counter_nrfx_ch_data {
counter_alarm_callback_t callback;
void *user_data;
};
struct counter_nrfx_config {
struct counter_config_info info;
struct counter_nrfx_ch_data *ch_data;
NRF_RTC_Type *rtc;
#if CONFIG_COUNTER_RTC_WITH_PPI_WRAP
bool use_ppi;
#endif
#if CONFIG_COUNTER_RTC_CUSTOM_TOP_SUPPORT
bool fixed_top;
#endif
LOG_INSTANCE_PTR_DECLARE(log);
};
static int start(const struct device *dev)
{
const struct counter_nrfx_config *config = dev->config;
nrf_rtc_task_trigger(config->rtc, NRF_RTC_TASK_START);
return 0;
}
static int stop(const struct device *dev)
{
const struct counter_nrfx_config *config = dev->config;
nrf_rtc_task_trigger(config->rtc, NRF_RTC_TASK_STOP);
return 0;
}
static uint32_t read(const struct device *dev)
{
const struct counter_nrfx_config *config = dev->config;
return nrf_rtc_counter_get(config->rtc);
}
static int get_value(const struct device *dev, uint32_t *ticks)
{
*ticks = read(dev);
return 0;
}
/* Function calculates distance between to values assuming that one first
* argument is in front and that values wrap.
*/
static uint32_t ticks_sub(const struct device *dev, uint32_t val,
uint32_t old, uint32_t top)
{
if (IS_FIXED_TOP(dev)) {
return (val - old) & NRF_RTC_COUNTER_MAX;
} else if (likely(IS_BIT_MASK(top))) {
return (val - old) & top;
}
/* if top is not 2^n-1 */
return (val >= old) ? (val - old) : val + top + 1 - old;
}
static uint32_t skip_zero_on_custom_top(uint32_t val, uint32_t top)
{
/* From Product Specification: If a CC register value is 0 when
* a CLEAR task is set, this will not trigger a COMPARE event.
*/
if (unlikely(val == 0) && (top != NRF_RTC_COUNTER_MAX)) {
val++;
}
return val;
}
static uint32_t ticks_add(const struct device *dev, uint32_t val1,
uint32_t val2, uint32_t top)
{
uint32_t sum = val1 + val2;
if (IS_FIXED_TOP(dev)) {
ARG_UNUSED(top);
return sum & NRF_RTC_COUNTER_MAX;
}
if (likely(IS_BIT_MASK(top))) {
sum = sum & top;
} else {
sum = sum > top ? sum - (top + 1) : sum;
}
return skip_zero_on_custom_top(sum, top);
}
static void set_cc_int_pending(const struct device *dev, uint8_t chan)
{
const struct counter_nrfx_config *config = dev->config;
struct counter_nrfx_data *data = dev->data;
atomic_or(&data->ipend_adj, BIT(chan));
NRFX_IRQ_PENDING_SET(NRFX_IRQ_NUMBER_GET(config->rtc));
}
/** @brief Handle case when CC value equals COUNTER+1.
*
* RTC will not generate event if CC value equals COUNTER+1. If such CC is
* about to be set then special algorithm is applied. Since counter must not
* expire before expected value, CC is set to COUNTER+2. If COUNTER progressed
* during that time it means that target value is reached and interrupt is
* manually triggered. If not then interrupt is enabled since it is expected
* that CC value will generate event.
*
* Additionally, an information about CC adjustment is stored. This information
* is used in the callback to return original CC value which was requested by
* the user.
*/
static void handle_next_tick_case(const struct device *dev, uint8_t chan,
uint32_t now, uint32_t val)
{
const struct counter_nrfx_config *config = dev->config;
struct counter_nrfx_data *data = dev->data;
val = ticks_add(dev, val, 1, data->top);
nrf_rtc_cc_set(config->rtc, chan, val);
atomic_or(&data->ipend_adj, CC_ADJ_MASK(chan));
if (nrf_rtc_counter_get(config->rtc) != now) {
set_cc_int_pending(dev, chan);
} else {
nrf_rtc_int_enable(config->rtc, NRF_RTC_CHANNEL_INT_MASK(chan));
}
}
/*
* @brief Set COMPARE value with optional too late setting detection.
*
* Setting CC algorithm takes into account:
* - Current COMPARE value written to the register may be close to the current
* COUNTER value thus COMPARE event may be generated at any moment
* - Next COMPARE value may be soon in the future. Taking into account potential
* preemption COMPARE value may be set too late.
* - RTC registers are clocked with LF clock (32kHz) and sampled between two
* LF ticks.
* - Setting COMPARE register to COUNTER+1 does not generate COMPARE event if
* done half tick before tick boundary.
*
* Algorithm assumes that:
* - COMPARE interrupt is disabled
* - absolute value is taking into account guard period. It means that
* it won't be further in future than <top> - <guard_period> from now.
*
* @param dev Device.
* @param chan COMPARE channel.
* @param val Value (absolute or relative).
* @param flags Alarm flags.
*
* @retval 0 if COMPARE value was set on time and COMPARE interrupt is expected.
* @retval -ETIME if absolute alarm was set too late and error reporting is
* enabled.
*
*/
static int set_cc(const struct device *dev, uint8_t chan, uint32_t val,
uint32_t flags)
{
const struct counter_nrfx_config *config = dev->config;
struct counter_nrfx_data *data = dev->data;
__ASSERT_NO_MSG(data->guard_period < data->top);
NRF_RTC_Type *rtc = config->rtc;
nrf_rtc_event_t evt;
uint32_t prev_val;
uint32_t top;
uint32_t now;
uint32_t diff;
uint32_t int_mask = NRF_RTC_CHANNEL_INT_MASK(chan);
int err = 0;
uint32_t max_rel_val;
bool absolute = flags & COUNTER_ALARM_CFG_ABSOLUTE;
bool irq_on_late;
__ASSERT(nrf_rtc_int_enable_check(rtc, int_mask) == 0,
"Expected that CC interrupt is disabled.");
evt = NRF_RTC_CHANNEL_EVENT_ADDR(chan);
top = data->top;
now = nrf_rtc_counter_get(rtc);
/* First take care of a risk of an event coming from CC being set to
* next tick. Reconfigure CC to future (now tick is the furthest
* future). If CC was set to next tick we need to wait for up to 15us
* (half of 32k tick) and clean potential event. After that time there
* is no risk of unwanted event.
*/
prev_val = nrf_rtc_cc_get(rtc, chan);
nrf_rtc_event_clear(rtc, evt);
nrf_rtc_cc_set(rtc, chan, now);
nrf_rtc_event_enable(rtc, int_mask);
if (ticks_sub(dev, prev_val, now, top) == 1) {
NRFX_DELAY_US(15);
nrf_rtc_event_clear(rtc, evt);
}
now = nrf_rtc_counter_get(rtc);
if (absolute) {
val = skip_zero_on_custom_top(val, top);
irq_on_late = flags & COUNTER_ALARM_CFG_EXPIRE_WHEN_LATE;
max_rel_val = top - data->guard_period;
} else {
/* If relative value is smaller than half of the counter range
* it is assumed that there is a risk of setting value too late
* and late detection algorithm must be applied. When late
* setting is detected, interrupt shall be triggered for
* immediate expiration of the timer. Detection is performed
* by limiting relative distance between CC and counter.
*
* Note that half of counter range is an arbitrary value.
*/
irq_on_late = val < (top / 2);
/* limit max to detect short relative being set too late. */
max_rel_val = irq_on_late ? top / 2 : top;
val = ticks_add(dev, now, val, top);
}
diff = ticks_sub(dev, val, now, top);
if (diff == 1) {
/* CC cannot be set to COUNTER+1 because that will not
* generate an event. In that case, special handling is
* performed (attempt to set CC to COUNTER+2).
*/
handle_next_tick_case(dev, chan, now, val);
} else {
nrf_rtc_cc_set(rtc, chan, val);
now = nrf_rtc_counter_get(rtc);
/* decrement value to detect also case when val == read(dev).
* Otherwise, condition would need to include comparing diff
* against 0.
*/
diff = ticks_sub(dev, val - 1, now, top);
if (diff > max_rel_val) {
if (absolute) {
err = -ETIME;
}
/* Interrupt is triggered always for relative alarm and
* for absolute depending on the flag.
*/
if (irq_on_late) {
set_cc_int_pending(dev, chan);
} else {
config->ch_data[chan].callback = NULL;
}
} else if (diff == 0) {
/* It is possible that setting CC was interrupted and
* CC might be set to COUNTER+1 value which will not
* generate an event. In that case, special handling
* is performed (attempt to set CC to COUNTER+2).
*/
handle_next_tick_case(dev, chan, now, val);
} else {
nrf_rtc_int_enable(rtc, int_mask);
}
}
return err;
}
static int set_channel_alarm(const struct device *dev, uint8_t chan,
const struct counter_alarm_cfg *alarm_cfg)
{
const struct counter_nrfx_config *nrfx_config = dev->config;
struct counter_nrfx_data *data = dev->data;
struct counter_nrfx_ch_data *chdata = &nrfx_config->ch_data[chan];
if (alarm_cfg->ticks > data->top) {
return -EINVAL;
}
if (chdata->callback) {
return -EBUSY;
}
chdata->callback = alarm_cfg->callback;
chdata->user_data = alarm_cfg->user_data;
atomic_and(&data->ipend_adj, ~CC_ADJ_MASK(chan));
return set_cc(dev, chan, alarm_cfg->ticks, alarm_cfg->flags);
}
static void disable(const struct device *dev, uint8_t chan)
{
const struct counter_nrfx_config *config = dev->config;
NRF_RTC_Type *rtc = config->rtc;
nrf_rtc_event_t evt = NRF_RTC_CHANNEL_EVENT_ADDR(chan);
nrf_rtc_int_disable(rtc, NRF_RTC_CHANNEL_INT_MASK(chan));
nrf_rtc_event_disable(rtc, NRF_RTC_CHANNEL_INT_MASK(chan));
nrf_rtc_event_clear(rtc, evt);
config->ch_data[chan].callback = NULL;
}
static int cancel_alarm(const struct device *dev, uint8_t chan_id)
{
disable(dev, chan_id);
return 0;
}
static int ppi_setup(const struct device *dev, uint8_t chan)
{
#if CONFIG_COUNTER_RTC_WITH_PPI_WRAP
const struct counter_nrfx_config *nrfx_config = dev->config;
struct counter_nrfx_data *data = dev->data;
NRF_RTC_Type *rtc = nrfx_config->rtc;
nrf_rtc_event_t evt = NRF_RTC_CHANNEL_EVENT_ADDR(chan);
nrfx_err_t result;
if (!nrfx_config->use_ppi) {
return 0;
}
nrf_rtc_event_enable(rtc, NRF_RTC_CHANNEL_INT_MASK(chan));
#ifdef DPPI_PRESENT
result = nrfx_dppi_channel_alloc(&data->ppi_ch);
if (result != NRFX_SUCCESS) {
ERR("Failed to allocate PPI channel.");
return -ENODEV;
}
nrf_rtc_subscribe_set(rtc, NRF_RTC_TASK_CLEAR, data->ppi_ch);
nrf_rtc_publish_set(rtc, evt, data->ppi_ch);
(void)nrfx_dppi_channel_enable(data->ppi_ch);
#else /* DPPI_PRESENT */
uint32_t evt_addr;
uint32_t task_addr;
evt_addr = nrf_rtc_event_address_get(rtc, evt);
task_addr = nrf_rtc_task_address_get(rtc, NRF_RTC_TASK_CLEAR);
result = nrfx_ppi_channel_alloc(&data->ppi_ch);
if (result != NRFX_SUCCESS) {
ERR("Failed to allocate PPI channel.");
return -ENODEV;
}
(void)nrfx_ppi_channel_assign(data->ppi_ch, evt_addr, task_addr);
(void)nrfx_ppi_channel_enable(data->ppi_ch);
#endif
#endif /* CONFIG_COUNTER_RTC_WITH_PPI_WRAP */
return 0;
}
static void ppi_free(const struct device *dev, uint8_t chan)
{
#if CONFIG_COUNTER_RTC_WITH_PPI_WRAP
const struct counter_nrfx_config *nrfx_config = dev->config;
struct counter_nrfx_data *data = dev->data;
uint8_t ppi_ch = data->ppi_ch;
NRF_RTC_Type *rtc = nrfx_config->rtc;
if (!nrfx_config->use_ppi) {
return;
}
nrf_rtc_event_disable(rtc, NRF_RTC_CHANNEL_INT_MASK(chan));
#ifdef DPPI_PRESENT
nrf_rtc_event_t evt = NRF_RTC_CHANNEL_EVENT_ADDR(chan);
(void)nrfx_dppi_channel_disable(ppi_ch);
nrf_rtc_subscribe_clear(rtc, NRF_RTC_TASK_CLEAR);
nrf_rtc_publish_clear(rtc, evt);
(void)nrfx_dppi_channel_free(ppi_ch);
#else /* DPPI_PRESENT */
(void)nrfx_ppi_channel_disable(ppi_ch);
(void)nrfx_ppi_channel_free(ppi_ch);
#endif
#endif
}
/* Return true if counter must be cleared by the CPU. It is cleared
* automatically in case of max top value or PPI usage.
*/
static bool sw_wrap_required(const struct device *dev)
{
struct counter_nrfx_data *data = dev->data;
return (data->top != NRF_RTC_COUNTER_MAX) && !IS_PPI_WRAP(dev);
}
static int set_fixed_top_value(const struct device *dev,
const struct counter_top_cfg *cfg)
{
const struct counter_nrfx_config *config = dev->config;
struct counter_nrfx_data *data = dev->data;
NRF_RTC_Type *rtc = config->rtc;
if (cfg->ticks != NRF_RTC_COUNTER_MAX) {
return -EINVAL;
}
nrf_rtc_int_disable(rtc, NRF_RTC_INT_OVERFLOW_MASK);
data->top_cb = cfg->callback;
data->top_user_data = cfg->user_data;
if (!(cfg->flags & COUNTER_TOP_CFG_DONT_RESET)) {
nrf_rtc_task_trigger(rtc, NRF_RTC_TASK_CLEAR);
}
if (cfg->callback) {
nrf_rtc_int_enable(rtc, NRF_RTC_INT_OVERFLOW_MASK);
}
return 0;
}
static int set_top_value(const struct device *dev,
const struct counter_top_cfg *cfg)
{
const struct counter_nrfx_config *nrfx_config = dev->config;
NRF_RTC_Type *rtc = nrfx_config->rtc;
struct counter_nrfx_data *dev_data = dev->data;
uint32_t top_ch = COUNTER_GET_TOP_CH(dev);
int err = 0;
if (IS_FIXED_TOP(dev)) {
return set_fixed_top_value(dev, cfg);
}
for (int i = 0; i < counter_get_num_of_channels(dev); i++) {
/* Overflow can be changed only when all alarms are
* disables.
*/
if (nrfx_config->ch_data[i].callback) {
return -EBUSY;
}
}
nrf_rtc_int_disable(rtc, NRF_RTC_CHANNEL_INT_MASK(top_ch));
if (IS_PPI_WRAP(dev)) {
if ((dev_data->top == NRF_RTC_COUNTER_MAX) &&
cfg->ticks != NRF_RTC_COUNTER_MAX) {
err = ppi_setup(dev, top_ch);
} else if (((dev_data->top != NRF_RTC_COUNTER_MAX) &&
cfg->ticks == NRF_RTC_COUNTER_MAX)) {
ppi_free(dev, top_ch);
}
}
dev_data->top_cb = cfg->callback;
dev_data->top_user_data = cfg->user_data;
dev_data->top = cfg->ticks;
nrf_rtc_cc_set(rtc, top_ch, cfg->ticks);
if (!(cfg->flags & COUNTER_TOP_CFG_DONT_RESET)) {
nrf_rtc_task_trigger(rtc, NRF_RTC_TASK_CLEAR);
} else if (read(dev) >= cfg->ticks) {
err = -ETIME;
if (cfg->flags & COUNTER_TOP_CFG_RESET_WHEN_LATE) {
nrf_rtc_task_trigger(rtc, NRF_RTC_TASK_CLEAR);
}
}
if (cfg->callback || sw_wrap_required(dev)) {
nrf_rtc_int_enable(rtc, NRF_RTC_CHANNEL_INT_MASK(top_ch));
}
return err;
}
static uint32_t get_pending_int(const struct device *dev)
{
return 0;
}
static int init_rtc(const struct device *dev, uint32_t prescaler)
{
const struct counter_nrfx_config *nrfx_config = dev->config;
struct counter_nrfx_data *data = dev->data;
struct counter_top_cfg top_cfg = {
.ticks = NRF_RTC_COUNTER_MAX
};
NRF_RTC_Type *rtc = nrfx_config->rtc;
int err;
#ifdef CONFIG_CLOCK_CONTROL_NRF
z_nrf_clock_control_lf_on(CLOCK_CONTROL_NRF_LF_START_NOWAIT);
#endif
nrf_rtc_prescaler_set(rtc, prescaler);
NRFX_IRQ_ENABLE(NRFX_IRQ_NUMBER_GET(rtc));
data->top = NRF_RTC_COUNTER_MAX;
err = set_top_value(dev, &top_cfg);
DBG("Initialized");
return err;
}
static uint32_t get_top_value(const struct device *dev)
{
struct counter_nrfx_data *data = dev->data;
return data->top;
}
static uint32_t get_guard_period(const struct device *dev, uint32_t flags)
{
struct counter_nrfx_data *data = dev->data;
return data->guard_period;
}
static int set_guard_period(const struct device *dev, uint32_t guard,
uint32_t flags)
{
struct counter_nrfx_data *data = dev->data;
data->guard_period = guard;
return 0;
}
static void top_irq_handle(const struct device *dev)
{
const struct counter_nrfx_config *config = dev->config;
struct counter_nrfx_data *data = dev->data;
NRF_RTC_Type *rtc = config->rtc;
counter_top_callback_t cb = data->top_cb;
nrf_rtc_event_t top_evt;
top_evt = IS_FIXED_TOP(dev) ?
NRF_RTC_EVENT_OVERFLOW :
NRF_RTC_CHANNEL_EVENT_ADDR(counter_get_num_of_channels(dev));
if (nrf_rtc_event_check(rtc, top_evt)) {
nrf_rtc_event_clear(rtc, top_evt);
/* Perform manual clear if custom top value is used and PPI
* clearing is not used.
*/
if (!IS_FIXED_TOP(dev) && !IS_PPI_WRAP(dev)) {
nrf_rtc_task_trigger(rtc, NRF_RTC_TASK_CLEAR);
}
if (cb) {
cb(dev, data->top_user_data);
}
}
}
static void alarm_irq_handle(const struct device *dev, uint32_t chan)
{
const struct counter_nrfx_config *config = dev->config;
struct counter_nrfx_data *data = dev->data;
NRF_RTC_Type *rtc = config->rtc;
nrf_rtc_event_t evt = NRF_RTC_CHANNEL_EVENT_ADDR(chan);
uint32_t int_mask = NRF_RTC_CHANNEL_INT_MASK(chan);
bool hw_irq_pending = nrf_rtc_event_check(rtc, evt) &&
nrf_rtc_int_enable_check(rtc, int_mask);
bool sw_irq_pending = data->ipend_adj & BIT(chan);
if (hw_irq_pending || sw_irq_pending) {
struct counter_nrfx_ch_data *chdata;
counter_alarm_callback_t cb;
nrf_rtc_event_clear(rtc, evt);
atomic_and(&data->ipend_adj, ~BIT(chan));
nrf_rtc_int_disable(rtc, int_mask);
chdata = &config->ch_data[chan];
cb = chdata->callback;
chdata->callback = NULL;
if (cb) {
uint32_t cc = nrf_rtc_cc_get(rtc, chan);
if (data->ipend_adj & CC_ADJ_MASK(chan)) {
cc = ticks_sub(dev, cc, 1, data->top);
}
cb(dev, chan, cc, chdata->user_data);
}
}
}
static void irq_handler(const struct device *dev)
{
top_irq_handle(dev);
for (uint32_t i = 0; i < counter_get_num_of_channels(dev); i++) {
alarm_irq_handle(dev, i);
}
}
static const struct counter_driver_api counter_nrfx_driver_api = {
.start = start,
.stop = stop,
.get_value = get_value,
.set_alarm = set_channel_alarm,
.cancel_alarm = cancel_alarm,
.set_top_value = set_top_value,
.get_pending_int = get_pending_int,
.get_top_value = get_top_value,
.get_guard_period = get_guard_period,
.set_guard_period = set_guard_period,
};
/*
* Devicetree access is done with node labels due to HAL API
* requirements. In particular, RTCx_CC_NUM values from HALs
* are indexed by peripheral number, so DT_INST APIs won't work.
*/
#define RTC_IRQ_CONNECT(idx) \
COND_CODE_1(DT_INST_PROP(idx, zli), \
(IRQ_DIRECT_CONNECT(DT_INST_IRQN(idx), \
DT_INST_IRQ(idx, priority), \
counter_rtc##idx##_isr_wrapper, \
IRQ_ZERO_LATENCY)), \
(IRQ_CONNECT(DT_INST_IRQN(idx), DT_INST_IRQ(idx, priority), \
irq_handler, DEVICE_DT_INST_GET(idx), 0)) \
)
#define COUNTER_NRF_RTC_DEVICE(idx) \
BUILD_ASSERT((DT_INST_PROP(idx, prescaler) - 1) <= \
RTC_PRESCALER_PRESCALER_Msk, \
"RTC prescaler out of range"); \
COND_CODE_1(DT_INST_PROP(idx, zli), ( \
ISR_DIRECT_DECLARE(counter_rtc##idx##_isr_wrapper) \
{ \
irq_handler(DEVICE_DT_INST_GET(idx)); \
/* No rescheduling, it shall not access zephyr primitives. */ \
return 0; \
}), ()) \
static int counter_##idx##_init(const struct device *dev) \
{ \
RTC_IRQ_CONNECT(idx); \
return init_rtc(dev, DT_INST_PROP(idx, prescaler) - 1); \
} \
static struct counter_nrfx_data counter_##idx##_data; \
static struct counter_nrfx_ch_data \
counter##idx##_ch_data[DT_INST_PROP(idx, cc_num)]; \
LOG_INSTANCE_REGISTER(LOG_MODULE_NAME, idx, CONFIG_COUNTER_LOG_LEVEL); \
static const struct counter_nrfx_config nrfx_counter_##idx##_config = {\
.info = { \
.max_top_value = NRF_RTC_COUNTER_MAX, \
.freq = DT_INST_PROP(idx, clock_frequency) / \
DT_INST_PROP(idx, prescaler), \
.flags = COUNTER_CONFIG_INFO_COUNT_UP, \
.channels = DT_INST_PROP(idx, fixed_top) \
? DT_INST_PROP(idx, cc_num) \
: DT_INST_PROP(idx, cc_num) - 1 \
}, \
.ch_data = counter##idx##_ch_data, \
.rtc = (NRF_RTC_Type *)DT_INST_REG_ADDR(idx), \
IF_ENABLED(CONFIG_COUNTER_RTC_WITH_PPI_WRAP, \
(.use_ppi = DT_INST_PROP(idx, ppi_wrap),)) \
IF_ENABLED(CONFIG_COUNTER_RTC_CUSTOM_TOP_SUPPORT, \
(.fixed_top = DT_INST_PROP(idx, fixed_top),)) \
LOG_INSTANCE_PTR_INIT(log, LOG_MODULE_NAME, idx) \
}; \
DEVICE_DT_INST_DEFINE(idx, \
counter_##idx##_init, \
NULL, \
&counter_##idx##_data, \
&nrfx_counter_##idx##_config.info, \
PRE_KERNEL_1, CONFIG_COUNTER_INIT_PRIORITY, \
&counter_nrfx_driver_api);
DT_INST_FOREACH_STATUS_OKAY(COUNTER_NRF_RTC_DEVICE)