Hello, I've a system including an adrv9009 zu11eg RF-SOM plugged on a ADRV2CRR-FMC board running Linux . The whole subsystem is connected to a host via a cabled PCIe connection.
Both PCIe adapter and adrv9009 zu11eg RF-SOM - ADRV2CRR-FMC are powered using a ATX24 power supply. The power supply switches on automatically as soon as the host system starts (using PS_ON wire) ...
I need to implement a mechanism which switches off the power supply (provided to PCIe adapter, ADRV2CRR-FM and adrv9009 zu11eg) Linux has completed the shutdown process.
As far as I understood this is topically achieved using the "gpio-poweroff" driver ... with can be used to disconnect the PS_ON of the power supply from GND ...causing the power off of the power supply.
I tried to add the "gpio-poweroff" stuff to the device tree but at boot time the system is informing me that gpio-poweroff can't be assigned since pm_power_off is already used elsewhere... I guess ADI used gpio-poweroff to switch off the power supply at adrv9009 zu11eg or ADRV2CRR-FM level.
"root@petalinux-test:~# dmesg | grep gpio-poweroff
[ 2.444566] poweroff-gpio fpga-axi@0:gpio-poweroff: gpio_poweroff_probe: pm_power_off function already registered
[ 2.444582] poweroff-gpio: probe of fpga-axi@0:gpio-poweroff failed with error -16
Is this correct ? Do you turn off the power at ADRV2CRR-FM or at adrv9009 zu11eg level ?
Which GPIO has been used for implementing the gpio-poweroff mechanism?
Is this signal physically accessible/measurable anywhere on ADRV2CRR-FM or adrv9009 zu11eg ?
Thanks for any advice...
Added dmesg dettail
[edited by: Joebre at 3:26 PM (GMT -5) on 15 Nov 2023]