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drivers: can: mcan: let front-end drivers supply register r/w functions

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Let the Bosch M_CAN front-end drivers supply their own register read/write
functions.

This is preparation for handling non-standard Bosch M_CAN register layouts
directly in the front-end and for accessing Bosch M_CAN IP cores over
peripheral busses.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
This commit is contained in:
Henrik Brix Andersen 2023-05-04 11:14:31 +02:00 • committed by Carles Cufí
commit bbfc1f905c
10 changed files with 197 additions and 35 deletions
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22
drivers/can/can_mcux_mcan.c
View file

@ -18,6 +18,7 @@ LOG_MODULE_REGISTER(can_mcux_mcan, CONFIG_CAN_LOG_LEVEL);
#define DT_DRV_COMPAT nxp_lpc_mcan
struct mcux_mcan_config {
mm_reg_t base;
const struct device *clock_dev;
clock_control_subsys_t clock_subsys;
void (*irq_config_func)(const struct device *dev);
@ -28,6 +29,22 @@ struct mcux_mcan_data {
struct can_mcan_msg_sram msg_ram __nocache;
};
static int mcux_mcan_read_reg(const struct device *dev, uint16_t reg, uint32_t *val)
{
const struct can_mcan_config *mcan_config = dev->config;
const struct mcux_mcan_config *mcux_config = mcan_config->custom;
return can_mcan_sys_read_reg(mcux_config->base, reg, val);
}
static int mcux_mcan_write_reg(const struct device *dev, uint16_t reg, uint32_t val)
{
const struct can_mcan_config *mcan_config = dev->config;
const struct mcux_mcan_config *mcux_config = mcan_config->custom;
return can_mcan_sys_write_reg(mcux_config->base, reg, val);
}
static int mcux_mcan_get_core_clock(const struct device *dev, uint32_t *rate)
{
const struct can_mcan_config *mcan_config = dev->config;
@ -142,6 +159,7 @@ static const struct can_driver_api mcux_mcan_driver_api = {
static void mcux_mcan_irq_config_##n(const struct device *dev); \
\
static const struct mcux_mcan_config mcux_mcan_config_##n = { \
.base = (mm_reg_t)DT_INST_REG_ADDR(n), \
.clock_dev = DEVICE_DT_GET(DT_INST_CLOCKS_CTLR(n)), \
.clock_subsys = (clock_control_subsys_t) \
DT_INST_CLOCKS_CELL(n, name), \
@ -150,7 +168,9 @@ static const struct can_driver_api mcux_mcan_driver_api = {
}; \
\
static const struct can_mcan_config can_mcan_config_##n = \
CAN_MCAN_DT_CONFIG_INST_GET(n, &mcux_mcan_config_##n); \
CAN_MCAN_DT_CONFIG_INST_GET(n, &mcux_mcan_config_##n, \
mcux_mcan_read_reg, \
mcux_mcan_write_reg); \
\
static struct mcux_mcan_data mcux_mcan_data_##n; \
\