drivers: can: remove the deprecated can_calc_prescaler() API function

Remove the deprecated can_calc_prescaler() CAN API function.

Signed-off-by: Henrik Brix Andersen <[email protected]>

Author: henrikbrixandersen

drivers/can/can_common.c

@@ -343,24 +343,6 @@ int z_impl_can_calc_timing_data(const struct device *dev, struct can_timing *res
 }
 #endif /* CONFIG_CAN_FD_MODE */
 
-int can_calc_prescaler(const struct device *dev, struct can_timing *timing,
-		       uint32_t bitrate)
-{
-	uint32_t ts = timing->prop_seg + timing->phase_seg1 + timing->phase_seg2 +
-		   CAN_SYNC_SEG;
-	uint32_t core_clock;
-	int ret;
-
-	ret = can_get_core_clock(dev, &core_clock);
-	if (ret != 0) {
-		return ret;
-	}
-
-	timing->prescaler = core_clock / (bitrate * ts);
-
-	return core_clock % (ts * timing->prescaler);
-}
-
 static int check_timing_in_range(const struct can_timing *timing,
 				 const struct can_timing *min,
 				 const struct can_timing *max)

include/zephyr/drivers/can.h

@@ -1053,29 +1053,6 @@ __syscall int can_set_timing_data(const struct device *dev,
  */
 __syscall int can_set_bitrate_data(const struct device *dev, uint32_t bitrate_data);
 
-/**
- * @brief Fill in the prescaler value for a given bitrate and timing
- *
- * Fill the prescaler value in the timing struct. The sjw, prop_seg, phase_seg1
- * and phase_seg2 must be given.
- *
- * The returned bitrate error is remainder of the division of the clock rate by
- * the bitrate times the timing segments.
- *
- * @deprecated This function allows for bitrate errors, but bitrate errors between nodes on the same
- *             network leads to them drifting apart after the start-of-frame (SOF) synchronization
- *             has taken place.
- *
- * @param dev     Pointer to the device structure for the driver instance.
- * @param timing  Result is written into the can_timing struct provided.
- * @param bitrate Target bitrate.
- *
- * @retval 0 or positive bitrate error.
- * @retval Negative error code on error.
- */
-__deprecated int can_calc_prescaler(const struct device *dev, struct can_timing *timing,
-				    uint32_t bitrate);
-
 /**
  * @brief Configure the bus timing of a CAN controller.
  *