braswell enable/disable pci device

Hello,

i try activated pci device 28 function 0 , 22C8h pcie Port 1:

i use register:  Function Disable (FUNC_DIS)—Offset 34h

FUNC_DIS_BITS  bit 20 - PCIE* function 0  set  0.

After write bit 20 set to 0, i read this register and this bit always 1.

Can you enable pci device by this register ?

is there another solution for activate this pci device (device 28 function 0 , 22C8h pcie Port 1) ?

Best regards,

Sébastien