Incorrect hardware reset cause sets for watchdog reset on stm32h743zi

[PragatiGarg-eaton]

Incorrect hardware reset cause sets for watchdog reset on stm32h743zi

Received reset cause = 0x01 (i.e., Bit 0 : Reset via external user defined pin)
In case of watchdog reset, 2 bits should be set (i.e., watchdog and reset pin) and cause id value should be "17".

• While correct reset cause sets for watchdog reset on stm32f429 and software reset on stm32h743 ((i.e., "3").

Note : STM32 SoCs implement various reset types by pulling the reset pin low. Therefore, these reset types set
the PINRST flag, even if the reset was not caused by an actual pin reset event. Which means the Reset pin bit
will be set every time the system gets reset along with the actual reset cause
git issue links : #43319 #37524

Target used : stm32h743zi
Zephyr version : v3.1.0-

To Reproduce
case 1 : watchdog reset
Enable the hardware info and watchdog in proj.conf of the project.

proj.conf-

CONFIG_LOG=y
CONFIG_WDT_LOG_LEVEL_DBG=y
CONFIG_WATCHDOG=y
CONFIG_WDT_DISABLE_AT_BOOT=n
CONFIG_HWINFO=y

Code:
main.cpp-

#include <zephyr/zephyr.h>
#include <zephyr/device.h>
#include <zephyr/drivers/watchdog.h>
#include <zephyr/sys/printk.h>
#include <stdbool.h>
#include <zephyr/drivers/hwinfo.h>

void reset_cause( void )
{
	int8_t ret_value;
        
        /* Retrieve cause of device reset*/
	ret_value = hwinfo_get_reset_cause( &reset_cause_id );
	if ( ret_value < 0 )
	{
		// Unexpected negative return value
		printk( "System Reset: Unexpected negative return value\n" );
	}

	printk( "System Reset Cause: %d\n", reset_cause_id );

	// Clearing the reset cause reason flag .
	hwinfo_clear_reset_cause();
}

Expected behavior

• The expected cause id : 17; reset cause due to watchdog. As, 3rd bit : watchdog and 0th bit : reset pin (always set for stm controller). But the observed result is 0x01 (Reset via external user defined pin)

Impact

• Incorrect reset cause id observed for watchdog reset cause.
• Multiple reset cause id observed even for the single reset cause.

Environment
Windows OS
IDE Used : Platform IO and Eclipse

[erwango]

@PragatiGarg-eaton please check #53111