On Sat, Jan 06, 2024 at 11:47:36PM -0500, Frank Li wrote: > On Sun, Jan 07, 2024 at 08:45:06AM +0530, Manivannan Sadhasivam wrote: > > On Wed, Dec 27, 2023 at 01:27:15PM -0500, Frank Li wrote: > > > iMX8MQ have two pci controllers. Adds "linux,pci-domain" as required > > > proptery for iMX8MQ to indicate pci controller index. > > > > > > > property > > > > > This adjustment paves the way for eliminating the hardcoded check on the > > > base register for acquiring the controller_id. > > > > > > ... > > > if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR) > > > imx6_pcie->controller_id = 1; > > > ... > > > > > > The controller_id is crucial and utilized for certain register bit > > > positions. It must align precisely with the controller index in the SoC. > > > An auto-incremented ID don't fit this case. The DTS or fuse configurations > > > may deactivate specific PCI controllers. > > > > > > > You cannot change the binding for the sake of driver. But you can make this > > change in other way. See below... > > > > > Signed-off-by: Frank Li <Frank.Li@xxxxxxx> > > > --- > > > > > > Notes: > > > Change from v5 to v6 > > > - rework commit message to explain why need required and why auto increase > > > id not work > > > > > > Change from v4 to v5 > > > - new patch at v5 > > > > > > .../bindings/pci/fsl,imx6q-pcie-common.yaml | 11 +++++++++++ > > > 1 file changed, 11 insertions(+) > > > > > > diff --git a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml > > > index d91b639ae7ae7..8f39b4e6e8491 100644 > > > --- a/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml > > > +++ b/Documentation/devicetree/bindings/pci/fsl,imx6q-pcie-common.yaml > > > @@ -265,6 +265,17 @@ allOf: > > > - const: apps > > > - const: turnoff > > > > > > + - if: > > > + properties: > > > + compatible: > > > + contains: > > > + enum: > > > + - fsl,imx8mq-pcie > > > + - fsl,imx8mq-pcie-ep > > > > "linux,pci-domain" is a generic property. So you cannot make it required only > > for certain SoCs. > > Sorry, why not? there are many generic property. > It doesn't make sense to make it required only for specific SoCs since it is not specific to any SoC. You can make it required for all. > > But you can make it so for all SoCs. This way, the drivers > > can also rely on it. > > > > Now, you should get rid of the commit message about driver internals: > > Not all dts already added "linux,pci-domain" yet. If required for all SOCs, > it will cause dtb check warnings. > You can safely add this property to all DTS. Nothing will break. - Mani > Frank > > > > > This adjustment paves the way for eliminating the hardcoded check on the > > > base register for acquiring the controller_id. > > > > > > ... > > > if (dbi_base->start == IMX8MQ_PCIE2_BASE_ADDR) > > > imx6_pcie->controller_id = 1; > > > ... > > > > > > The controller_id is crucial and utilized for certain register bit > > > positions. It must align precisely with the controller index in the SoC. > > > An auto-incremented ID don't fit this case. The DTS or fuse configurations > > > may deactivate specific PCI controllers. > > > > > > > - Mani > > > > > + then: > > > + required: > > > + - linux,pci-domain > > > + > > > additionalProperties: true > > > > > > ... > > > -- > > > 2.34.1 > > > > > > > -- > > மணிவண்ணன் சதாசிவம் -- மணிவண்ணன் சதாசிவம்
