On 03/13/2013 03:33 PM, Thierry Reding wrote: > On Wed, Mar 13, 2013 at 10:58:02AM -1000, Mitch Bradley wrote: > [...] >> In this case, the answer to "what does pcie_controller do?" is >> "it implements a PCI bus" below. So 'device_type = "pci"' is >> appropriate. > > Alright, that's 2 against 1. I don't have much of a choice but to > yield.
Just one note here though re: how the Tegra HW works: The Tegra "PCIe controller" HW translates from a SoC-internal bus to another SoC-internal bus. The "PCIe root ports" translate from that second SoC-internal bus to a PCIe bus. That's exactly why the PCIe root port configuration registers don't show up via type 0 PCIe configuration transactions. Thus, from a HW perspective, it really is true that the PCIe root ports are PCI devices, but the "PCIe controller" really isn't anything to do with PCIe. _______________________________________________ devicetree-discuss mailing list [email protected] https://lists.ozlabs.org/listinfo/devicetree-discuss
