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drivers: can: remove CAN_BUS_UNKNOWN CAN controller state

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The CAN_BUS_UNKNOWN CAN controller state is only used to indicate that
the current CAN controller state could not be read.

Remove it and change the signature of the can_get_state() API function
to return an integer indicating success or failure.

Signed-off-by: Henrik Brix Andersen <hebad@vestas.com>
This commit is contained in:
Henrik Brix Andersen 2022-01-19 10:21:01 +01:00 • committed by Carles Cufí
commit 2aed5a1237
15 changed files with 155 additions and 114 deletions
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11
drivers/can/can_rcar.c
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@ -671,16 +671,21 @@ static void can_rcar_set_state_change_callback(const struct device *dev,
data->state_change_cb_data = user_data;
}
static enum can_state can_rcar_get_state(const struct device *dev,
struct can_bus_err_cnt *err_cnt)
static int can_rcar_get_state(const struct device *dev, enum can_state *state,
struct can_bus_err_cnt *err_cnt)
{
const struct can_rcar_cfg *config = DEV_CAN_CFG(dev);
struct can_rcar_data *data = DEV_CAN_DATA(dev);
if (state != NULL) {
*state = data->state;
}
if (err_cnt != NULL) {
can_rcar_get_error_count(config, err_cnt);
}
return data->state;
return 0;
}
#ifndef CONFIG_CAN_AUTO_BUS_OFF_RECOVERY