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drivers: can: mcan: move message RAM configuration to front-end drivers

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Some Bosch M_CAN IP core implementations use a fixed Message RAM
configuration, other use a fixed memory area and relative addressing,
others again have custom registers for configuring the Message RAM.

Move the responsibility for configuring the various Bosch M_CAN Message RAM
addresses to the front-end drivers. This removes some of the front-end
specific code from the backend. Provide a helper function for configuring
the most common variations.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
This commit is contained in:
Henrik Brix Andersen 2023-05-07 19:00:15 +02:00 • committed by Carles Cufí
commit a781ccde0f
6 changed files with 123 additions and 72 deletions
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13
drivers/can/can_mcux_mcan.c
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@ -58,6 +58,9 @@ static int mcux_mcan_init(const struct device *dev)
{
const struct can_mcan_config *mcan_config = dev->config;
const struct mcux_mcan_config *mcux_config = mcan_config->custom;
struct can_mcan_data *mcan_data = dev->data;
struct mcux_mcan_data *mcux_data = mcan_data->custom;
const uintptr_t mrba = POINTER_TO_UINT(&mcux_data->msg_ram) & CAN_MCAN_MRBA_BA;
int err;
if (!device_is_ready(mcux_config->clock_dev)) {
@ -76,6 +79,16 @@ static int mcux_mcan_init(const struct device *dev)
return -EINVAL;
}
err = can_mcan_write_reg(dev, CAN_MCAN_MRBA, (uint32_t)mrba);
if (err != 0) {
return -EIO;
}
err = can_mcan_configure_message_ram(dev, mrba);
if (err != 0) {
return -EIO;
}
err = can_mcan_init(dev);
if (err) {
LOG_ERR("failed to initialize mcan (err %d)", err);