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counter: nxp_pit: use clock control to obtain module's clock rate

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Use standard clock control API to retrieve the PIT clock rate instead of
using the HAL.

Signed-off-by: Manuel Argüelles <manuel.arguelles@nxp.com>
This commit is contained in:
Manuel Argüelles 2023-09-19 18:49:40 +07:00 • committed by Carles Cufí
commit 45c8cb2343
4 changed files with 32 additions and 7 deletions
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34
drivers/counter/counter_mcux_pit.c
View file

@ -7,6 +7,7 @@
#define DT_DRV_COMPAT nxp_kinetis_pit
#include <zephyr/drivers/counter.h>
#include <zephyr/drivers/clock_control.h>
#include <zephyr/irq.h>
#include <fsl_pit.h>
@ -21,6 +22,8 @@ struct mcux_pit_config {
pit_chnl_t pit_channel;
uint32_t pit_period;
void (*irq_config_func)(const struct device *dev);
const struct device *clock_dev;
clock_control_subsys_t clock_subsys;
};
struct mcux_pit_data {
@ -114,6 +117,19 @@ static uint32_t mcux_pit_get_pending_int(const struct device *dev)
return ((flags & mask) == mask);
}
static uint32_t mcux_pit_get_frequency(const struct device *dev)
{
const struct mcux_pit_config *config = dev->config;
uint32_t clock_rate;
if (clock_control_get_rate(config->clock_dev, config->clock_subsys, &clock_rate)) {
LOG_ERR("Failed to get clock rate");
return 0;
}
return clock_rate;
}
static void mcux_pit_isr(const struct device *dev)
{
const struct mcux_pit_config *config = dev->config;
@ -130,9 +146,14 @@ static void mcux_pit_isr(const struct device *dev)
static int mcux_pit_init(const struct device *dev)
{
const struct mcux_pit_config *config =
(struct mcux_pit_config *)dev->config;
const struct mcux_pit_config *config = dev->config;
pit_config_t pit_config;
uint32_t clock_rate;
if (!device_is_ready(config->clock_dev)) {
LOG_ERR("Clock control device not ready");
return -ENODEV;
}
PIT_GetDefaultConfig(&pit_config);
pit_config.enableRunInDebug = config->enableRunInDebug;
@ -141,9 +162,9 @@ static int mcux_pit_init(const struct device *dev)
config->irq_config_func(dev);
clock_rate = mcux_pit_get_frequency(dev);
PIT_SetTimerPeriod(config->base, config->pit_channel,
USEC_TO_COUNT(config->pit_period,
CLOCK_GetFreq(kCLOCK_BusClk)));
USEC_TO_COUNT(config->pit_period, clock_rate));
return 0;
}
@ -155,6 +176,7 @@ static const struct counter_driver_api mcux_pit_driver_api = {
.set_top_value = mcux_pit_set_top_value,
.get_pending_int = mcux_pit_get_pending_int,
.get_top_value = mcux_pit_get_top_value,
.get_freq = mcux_pit_get_frequency,
};
#define COUNTER_MCUX_PIT_IRQ_CONFIG(idx, n) \
@ -174,12 +196,14 @@ static const struct counter_driver_api mcux_pit_driver_api = {
.info = { \
.max_top_value = DT_INST_PROP(n, max_load_value), \
.channels = 0, \
.freq = DT_INST_PROP(n, clock_frequency), \
}, \
.base = (PIT_Type *)DT_INST_REG_ADDR(n), \
.pit_channel = DT_INST_PROP(n, pit_channel), \
.pit_period = DT_INST_PROP(n, pit_period), \
.irq_config_func = mcux_pit_irq_config_##n, \
.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \
.clock_subsys = (clock_control_subsys_t) \
DT_INST_CLOCKS_CELL(n, name), \
}; \
\
DEVICE_DT_INST_DEFINE(n, &mcux_pit_init, NULL, \