Re: [PATCH] MIPS: Cobalt: Include legacy IDE ports in the PCI I/O window

[Maciej W. Rozycki]

On Thu, 15 Oct 2026, Florian Fainelli wrote:

> The Cobalt PCI I/O window starts at 0x1000, excluding the VIA IDE
> controller's fixed compatibility-mode ports at 0x170, 0x1f0, 0x376 and
> 0x3f6. These resources cannot be claimed under the host bridge window.
> 
> Since pcibios_enable_device() was converted to pci_enable_resources(),
> the unclaimed IDE resources cause device enable to fail with -EINVAL:
> 
>   pata_via 0000:00:09.1: BAR 0 [io  0x01f0-0x01f7]: not claimed; can't enable device
>   pata_via 0000:00:09.1: probe with driver pata_via failed with error -22
> 
> Lower the PCI I/O window start to 0x100 so the fixed IDE resources can
> be claimed. Keep the reserved ISA resources below 0x100 outside the PCI
> window.

 Why not go with 0 (unless that's not what the system controller supports 
as the bottom of the PCI I/O space), and just set PCIBIOS_MIN_IO correctly 
as several platforms do instead?  Is there a southbridge in your system?

  Maciej