Hi, > Hopefully there are examples of passing these values through ACPI.
Are you suggesting here to look at the ide-acpi.c sourc file available as part of the driver code? In my original post I mentioned that I have modified the ide-generic.c source file to use the IO port addresses and IRQ number that we used in the older kernel. Also, added code in the kernel under arch/PowerPC/mm/init_32.c source to configure the addresses required by the driver as IO ports. But the error I am getting still continues to suggest that probably the required address range is still setup by the kernel as IO ports. How can we configure a set of virtual address as IO ports in the kernel version 4.15.13? Sachin -- Sent from: http://linuxppc.10917.n7.nabble.com/linuxppc-dev-f3.html