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drivers: can: mcux: flexcan: add transceiver support

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Add support for CAN transceivers to the NXP MCUX FlexCAN driver.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
This commit is contained in:
Henrik Brix Andersen 2022-03-01 12:50:57 +01:00 • committed by Maureen Helm
commit 43c02b1e16
1 changed files with 33 additions and 3 deletions
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36
drivers/can/can_mcux_flexcan.c
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@ -9,6 +9,7 @@
#include <zephyr.h>
#include <sys/atomic.h>
#include <drivers/can.h>
#include <drivers/can/transceiver.h>
#include <drivers/clock_control.h>
#include <device.h>
#include <sys/byteorder.h>
@ -84,6 +85,8 @@ struct mcux_flexcan_config {
uint32_t phase_seg1;
uint32_t phase_seg2;
void (*irq_config_func)(const struct device *dev);
const struct device *phy;
uint32_t max_bitrate;
};
struct mcux_flexcan_rx_callback {
@ -132,6 +135,15 @@ int mcux_flexcan_get_max_filters(const struct device *dev, enum can_ide id_type)
return CONFIG_CAN_MAX_FILTER;
}
int mcux_flexcan_get_max_bitrate(const struct device *dev, uint32_t *max_bitrate)
{
const struct mcux_flexcan_config *config = dev->config;
*max_bitrate = config->max_bitrate;
return 0;
}
static int mcux_flexcan_set_timing(const struct device *dev,
const struct can_timing *timing,
const struct can_timing *timing_data)
@ -168,13 +180,21 @@ static int mcux_flexcan_set_mode(const struct device *dev, enum can_mode mode)
const struct mcux_flexcan_config *config = dev->config;
flexcan_config_t flexcan_config;
uint32_t clock_freq;
int ret;
int err;
ret = mcux_flexcan_get_core_clock(dev, &clock_freq);
if (ret != 0) {
err = mcux_flexcan_get_core_clock(dev, &clock_freq);
if (err != 0) {
return -EIO;
}
if (config->phy != NULL) {
err = can_transceiver_enable(config->phy);
if (err != 0) {
LOG_ERR("failed to enable CAN transceiver (err %d)", err);
return err;
}
}
FLEXCAN_GetDefaultConfig(&flexcan_config);
flexcan_config.maxMbNum = FSL_FEATURE_FLEXCAN_HAS_MESSAGE_BUFFER_MAX_NUMBERn(0);
flexcan_config.clkSrc = config->clk_source;
@ -667,6 +687,13 @@ static int mcux_flexcan_init(const struct device *dev)
int err;
int i;
if (config->phy != NULL) {
if (!device_is_ready(config->phy)) {
LOG_ERR("CAN transceiver not ready");
return -ENODEV;
}
}
k_mutex_init(&data->rx_mutex);
k_sem_init(&data->tx_allocs_sem, MCUX_FLEXCAN_MAX_TX,
MCUX_FLEXCAN_MAX_TX);
@ -731,6 +758,7 @@ static const struct can_driver_api mcux_flexcan_driver_api = {
.set_state_change_callback = mcux_flexcan_set_state_change_callback,
.get_core_clock = mcux_flexcan_get_core_clock,
.get_max_filters = mcux_flexcan_get_max_filters,
.get_max_bitrate = mcux_flexcan_get_max_bitrate,
/*
* FlexCAN timing limits are specified in the "FLEXCANx_CTRL1 field
* descriptions" table in the SoC reference manual.
@ -785,6 +813,8 @@ static const struct can_driver_api mcux_flexcan_driver_api = {
.phase_seg2 = DT_INST_PROP_OR(id, phase_seg2, 0), \
.sample_point = DT_INST_PROP_OR(id, sample_point, 0), \
.irq_config_func = mcux_flexcan_irq_config_##id, \
.phy = DEVICE_DT_GET_OR_NULL(DT_INST_PHANDLE(id, phys)),\
.max_bitrate = DT_INST_CAN_TRANSCEIVER_MAX_BITRATE(id, 1000000), \
}; \
\
static struct mcux_flexcan_data mcux_flexcan_data_##id; \