Re: [PATCH v4 3/3] arm64: dts: qcom: qcs6490-rb3gen2: add endpoint buses

[Greg KH <gregkh@linuxfoundation.org>]

On Thu, Oct 01, 2026 at 02:19:14PM -0500, Alex Elder wrote:
> On 10/1/26 7:06 AM, Greg KH wrote:
> > On Fri, Sep 18, 2026 at 10:26:58AM -0500, Alex Elder wrote:
> > > The TC9564 SoC incorporates a PCIe switch, which is connected via
> > > the second PCI segment (0001) on the RB3gen2 platform.  The third
> > > downstream port of that switch (pcie@3,0) has an embedded PCIe
> > > endpoint that implements two PCIe functions.
> > > 
> > > The SoC implements other peripherals, and they will be accessed via
> > > PCI endpoint bus.  Define the devicetree nodes representing these
> > > buses, including the mapping of each BAR's address range to its
> > > local address space.
> > > 
> > > The endpoint's ranges property must be defined, but it will be
> > > updated dynamically to include all BARs.  As a result of this update,
> > > the parent address portion of each range will reflect the specific
> > > address assigned to the BAR.
> > > 
> > > Co-developed-by: Daniel Thompson <daniel@riscstar.com>
> > > Signed-off-by: Daniel Thompson <daniel@riscstar.com>
> > > Signed-off-by: Alex Elder <elder@riscstar.com>
> > > ---
> > >   arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts | 30 ++++++++++++++++++++
> > >   1 file changed, 30 insertions(+)
> > > 
> > > diff --git a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> > > index 3bb5fca8e2b13..5b7f5292a8864 100644
> > > --- a/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> > > +++ b/arch/arm64/boot/dts/qcom/qcs6490-rb3gen2.dts
> > > @@ -955,11 +955,41 @@ pcie@3,0 {
> > >   			bus-range = <0x5 0xff>;
> > >   			dev@0,0 {
> > > +				compatible = "pci1179,0220";
> > >   				reg = <0x50000 0x0 0x0 0x0 0x0>;
> > > +				#address-cells = <3>;
> > > +				#size-cells = <2>;
> > > +				/* Ranges will be updated dynamically */
> > > +				ranges = <0x0 0x0 0x0  0x83050000 0x0 0x0  0x0 0x4000>,
> > > +					 <0x2 0x0 0x0  0x83050000 0x0 0x4000  0x0 0x80000>,
> > > +					 <0x4 0x0 0x0  0x83050000 0x0 0x84000  0x0 0x200000>;
> > > +
> > > +				pci-ep-bus@4 {
> > > +					compatible = "simple-bus";
> > > +					#address-cells = <1>;
> > > +					#size-cells = <1>;
> > > +					/* Map 0x0-0x1fffff to BAR 4 */
> > > +					ranges = <0x0  0x4 0x0 0x0  0x200000>;
> > > +				};
> > >   			};
> > >   			dev@0,1 {
> > > +				compatible = "pci1179,0220";
> > >   				reg = <0x50100 0x0 0x0 0x0 0x0>;
> > > +				#address-cells = <3>;
> > > +				#size-cells = <2>;
> > > +				/* Ranges will be updated dynamically */
> > > +				ranges = <0x0 0x0 0x0  0x83050100 0x0 0x0  0x0 0x4000>,
> > > +					 <0x2 0x0 0x0  0x83050100 0x0 0x4000  0x0 0x80000>,
> > > +					 <0x4 0x0 0x0  0x83050100 0x0 0x84000  0x0 0x200000>;
> > > +
> > > +				pci-ep-bus@4 {
> > > +					compatible = "simple-bus";
> > > +					#address-cells = <1>;
> > > +					#size-cells = <1>;
> > > +					/* Map 0x0-0x1fffff to BAR 4 */
> > > +					ranges = <0x0  0x4 0x0 0x0  0x200000>;
> > > +				};
> > >   			};
> > >   		};
> > >   	};
> > > -- 
> > > 2.53.0
> > > 
> > 
> > This doesn't apply to the char-misc-testing branch :(
> 
> Sorry about that.  It does apply to to the for-next branch for
> Qualcomm, so this should probably get merged through that path.
> 
> https://lore.kernel.org/lkml/20260918152659.413268-1-elder@riscstar.com/

I suggest sending it to whoever maintains that tree.