# STM32 CAN configuration options

# Copyright (c) 2020 Alexander Wachter
# SPDX-License-Identifier: Apache-2.0

DT_COMPAT_STM32_FDCAN := st,stm32-fdcan

config CAN_STM32FD
	bool "STM32 FDCAN driver"
	default $(dt_compat_enabled,$(DT_COMPAT_STM32_FDCAN))
	select CAN_MCAN
	select USE_STM32_LL_RCC

if CAN_STM32FD

config CAN_MAX_STD_ID_FILTER
	int "Maximum number of std ID filters"
	default 28
	range 0 28
	help
	  Defines the maximum number of filters with standard ID (11-bit)
	  that can be attached.

config CAN_MAX_EXT_ID_FILTER
	int "Maximum number of ext ID filters"
	default 8
	range 0 8
	help
	  Defines the maximum number of filters with extended ID (29-bit)
	  that can be attached.

choice CAN_STM32FD_CLOCK_SOURCE
	prompt "CAN clock source"
	default CAN_STM32FD_CLOCK_SOURCE_HSE
	help
	  CAN clock source selection.

config CAN_STM32FD_CLOCK_SOURCE_HSE
	bool "HSE"
	help
	  HSE clock used as FDCAN clock source.

config CAN_STM32FD_CLOCK_SOURCE_PLL
	bool "PLL"
	depends on !SOC_SERIES_STM32U5X
	help
	  PLL "Q" clock used ad FDCAN clock source.

config CAN_STM32FD_CLOCK_SOURCE_PCLK1
	bool "PCLK1"
	depends on !SOC_SERIES_STM32U5X
	help
	  PCLK1 clock used ad FDCAN clock source.

config CAN_STM32FD_CLOCK_SOURCE_PLL1Q
	bool "PLL1Q"
	depends on SOC_SERIES_STM32U5X
	help
	  PLL1 "Q" clock used as FDCAN clock source.

config CAN_STM32FD_CLOCK_SOURCE_PLL2P
	bool "PLL2P"
	depends on SOC_SERIES_STM32U5X
	help
	  PLL2 "P" clock used as FDCAN clock source.

endchoice

config CAN_STM32FD_CLOCK_DIVISOR
	int "CAN clock divisor"
	depends on CAN_STM32FD_CLOCK_SOURCE_PCLK1
	range 1 30
	default 1
	help
	  The APB clock is divided by this value (stored in CKDIV register)
	  before it is fed to the CAN core.
	  Note that the the divisor affects all CAN controllers.
	  Allowed values: 1 or 2 * n, where n <= 15.

endif # CAN_STM32FD