STM32: why is PTP supported only on F7, H5 & H7 Series and not on other series that have ethernet support?

[mariopaja]

We are looking for a MCU for our new project and we were thinking of a F4 series chip. I started looking around the drivers and I noticed Kconfig.stm32_hal that PTP is implemented only on F7, H5 & H7.

Is there any particular reason why PTP is not implemented on other series, or it was just out of the scope?.

if SOC_SERIES_STM32F7X || SOC_SERIES_STM32H7X || SOC_SERIES_STM32H5X

config PTP_CLOCK_STM32_HAL
	bool "STM32 HAL PTP clock driver support"
	default y
	depends on PTP_CLOCK || NET_L2_PTP
	help
	  Enable STM32 PTP clock support.

config ETH_STM32_HAL_PTP_CLOCK_SRC_HZ
	int "Frequency of the clock source for the PTP timer"
	default 50000000
	depends on PTP_CLOCK_STM32_HAL
	help
	  Set the frequency in Hz sourced to the PTP timer.
	  If the value is set properly, the timer will be accurate.

config ETH_STM32_HAL_PTP_CLOCK_ADJ_MIN_PCT
	int "Lower bound of clock frequency adjustment (in percent)"
	default 90
	depends on PTP_CLOCK_STM32_HAL
	help
	  Specifies lower bound of PTP clock rate adjustment.

config ETH_STM32_HAL_PTP_CLOCK_ADJ_MAX_PCT
	int "Upper bound of clock frequency adjustment (in percent)"
	default 110
	depends on PTP_CLOCK_STM32_HAL
	help
	  Specifies upper bound of PTP clock rate adjustment.

config ETH_STM32_HAL_PTP_CLOCK_INIT_PRIO
	int
	default 85
	depends on PTP_CLOCK_STM32_HAL
	help
	  STM32 PTP Clock initialization priority level. There is
	  a dependency from the network stack that this device
	  initializes before network stack (NET_INIT_PRIO).

endif # SOC_SERIES_STM32F7X || SOC_SERIES_STM32H7X || SOC_SERIES_STM32H5X```

[Desvauxm-st]

the SOC_SERIE_STMF4X serie is not implemended yet

[Desvauxm-st]

could you try to modify Kconfig.stm32_hal like that:
if SOC_SERIES_STM32F4X || SOC_SERIES_STM32F7X || SOC_SERIES_STM32H7X || SOC_SERIES_STM32H5X
it compile on the nucleo_F429zi with success but i can't check if it works or not
could you try please

[mariopaja]

Sure I will try to compile today or tomorrow and if it works I will create a PR. Thank you!