Messages in this thread | | | From | Geert Uytterhoeven <> | Date | Fri, 8 Nov 2019 09:36:56 +0100 | Subject | Re: [PATCH 3/5] PCI: rcar: Add R-Car PCIe endpoint device tree bindings |
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Hi Prabhakar,
On Thu, Nov 7, 2019 at 11:46 PM Lad, Prabhakar <prabhakar.csengg@gmail.com> wrote: > On Thu, Nov 7, 2019 at 8:08 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote: > > On Thu, Nov 7, 2019 at 10:26 AM Lad, Prabhakar > > <prabhakar.csengg@gmail.com> wrote: > > > On Thu, Nov 7, 2019 at 8:44 AM Geert Uytterhoeven <geert@linux-m68k.org> wrote: > > > > On Wed, Nov 6, 2019 at 8:36 PM Lad Prabhakar <prabhakar.csengg@gmail.com> wrote: > > > > > From: "Lad, Prabhakar" <prabhakar.mahadev-lad.rj@bp.renesas.com> > > > > > > > > > > This patch adds the bindings for the R-Car PCIe endpoint driver. > > > > > > > > > > Signed-off-by: Lad, Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com> > > > > > > > > > --- /dev/null > > > > > +++ b/Documentation/devicetree/bindings/pci/rcar-pci-ep.txt
> > > > > +- reg: Five register ranges as listed in the reg-names property > > > > > +- reg-names: Must include the following names > > > > > + - "apb-base" > > > > > + - "memory0" > > > > > + - "memory1" > > > > > + - "memory2" > > > > > + - "memory3" > > > > > > > > What is the purpose of the last 4 regions? > > > > Can they be chosen by the driver, at runtime? > > > > > > > no the driver cannot choose them at runtime, as these are the only > > > PCIE memory(0/1/2/3) ranges > > > in the AXI address space where host memory can be mapped. > > > > Are they fixed by the PCIe hardware, i.e. could they be looked up by the > > driver based on the compatible value? > > > yes they are fixed by the PCIe hardware and could be looked up by the driver > based on the compatible value.
Thanks, so we don't need to describe them in DT.
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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