*** Using Zephyr OS v3.6.99-100befc70c74 ***
00> 
00> === SYSTEM STARTUP ===
00> Boot time: 154 ms
00> QSPI JEDEC ID Read & Flash Byte Test
00> Flash device ready
00> Proceeding to powerdown test...
00> === ENTERING POWERDOWN SEQUENCE ===
00> Turning off LEDs...
00> LED0 off: OK
00> LED1 off: OK
00> Backlight off: OK
00> LED2 off: OK
00> Stopping PWM...
00> [00:00:00.756,042] <dbg> pwm_nrf_sw: pwm_nrf_sw_set_cycles: channel 0, period 0, pulse 0
00> PWM suspend: FAILED (ret=-88)
00> Putting flash into deep power-down...
00> Stopping all timers...
00> Timers stopped
00> Unable to suspend ADC device adc@40007000 (err -88)
00> Unable to suspend ADC device adc@40007000 (err -88)
00> Unable to suspend ADC device adc@40007000 (err -88)
00> Final delay before powerdown...
00> === CALLING sys_poweroff() NOW ===
00> If you see this message again after reset, powerdown worked!