Messages in this thread | | | Date | Wed, 13 Apr 2022 21:22:07 +0300 | From | Vladimir Oltean <> | Subject | Re: [PATCH v3 1/8] arm64: dts: ls1028a: Add PCIe EP nodes |
| |
On Wed, Apr 13, 2022 at 06:03:37PM +0000, Leo Li wrote: > > arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi:631.23-656.5: Warning > > (unique_unit_address): /soc/pcie@3400000: duplicate unit-address (also > > used in node /soc/pcie-ep@3400000) > > arch/arm64/boot/dts/freescale/fsl-ls1028a.dtsi:670.23-695.5: Warning > > (unique_unit_address): /soc/pcie@3500000: duplicate unit-address (also > > used in node /soc/pcie-ep@3500000) > > This would be a common problem for all the layerscape PCIe controller. > The controller can either work in RC mode or EP mode. The current > binding of the controller defined two compatibles, one for RC and one > for EP. Therefore the SoC dtsi will have two nodes with the same unit > address one for EP one for RC. Fixing this probably requires > comprehensive updates to the binding which breaks backward > compatibility.
So we have to live with these warnings forever now?
How are the PCIe controllers configured for RC or EP mode? Via RCW? Is dynamic configuration possible?
Can't U-Boot detect the operating mode from the RCW and fix up the compatible string in case the controller is in endpoint mode?
| |