soc_flash_nrf: flash_write timeout after bt_disable

[marcowidmer]

Describe the bug

With CONFIG_SOC_FLASH_NRF_RADIO_SYNC_TICKER=y, calling flash_write() after bt_disable() returns -ETIMEDOUT.

This is because the flash driver wants to sync with the BLE ticker (nrf_flash_sync_is_required() returns true), but the ticker is not being triggered because bluetooth is disabled.

Regression

• This is a regression.

Steps to reproduce

Run the following sample on the NRF52:

#include <zephyr/bluetooth/bluetooth.h>
#include <zephyr/drivers/flash.h>
#include <zephyr/storage/flash_map.h>

#define TEST_PARTITION storage_partition

#define TEST_PARTITION_OFFSET FIXED_PARTITION_OFFSET(TEST_PARTITION)
#define TEST_PARTITION_DEVICE FIXED_PARTITION_DEVICE(TEST_PARTITION)

void main(void)
{
	const struct device *flash_dev = TEST_PARTITION_DEVICE;
	const uint32_t data = 0xdeadbeef;
	int err;

	bt_enable(NULL);
	bt_disable();

	printk("Writing to flash...\n");
	err = flash_write(flash_dev, TEST_PARTITION_OFFSET, &data, sizeof(data));
	printk("Result = %d\n", err);
}

Relevant log output

Writing to flash...
Result = -116

Impact

Functional Limitation – Some features not working as expected, but system usable.

Environment

Zephyr 4.1

Additional Context

No response