From: Frank Li <Frank.li@nxp.com> To: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Cc: krzysztof.kozlowski@linaro.org, bhelgaas@google.com, conor+dt@kernel.org, devicetree@vger.kernel.org, festevam@gmail.com, helgaas@kernel.org, hongxing.zhu@nxp.com, imx@lists.linux.dev, kernel@pengutronix.de, krzysztof.kozlowski+dt@linaro.org, kw@linux.com, l.stach@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, lpieralisi@kernel.org, robh@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org Subject: Re: [PATCH v7 04/16] dt-bindings: imx6q-pcie: Add linux,pci-domain as required for iMX8MQ Date: Sun, 7 Jan 2024 00:38:10 -0500 [thread overview] Message-ID: <ZZo4wkHf4RE2O9UN@lizhi-Precision-Tower-5810> (raw) In-Reply-To: <20240107051917.GG3416@thinkpad> On Sun, Jan 07, 2024 at 10:49:17AM +0530, Manivannan Sadhasivam wrote: > 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@nxp.com> > > > > --- > > > > > > > > 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. More than 2 controller need require "linux,pci-domain". > > > > 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. Yes, but it will be off topic of this patch serial. I can submit new patches for this later. After all dts changed, then I remove this conditional check. This patch serial is already quite big, (17 patches). And I don't want to involve new DTB check warning. Frank > > - 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
WARNING: multiple messages have this Message-ID (diff)
From: Frank Li <Frank.li@nxp.com> To: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Cc: krzysztof.kozlowski@linaro.org, bhelgaas@google.com, conor+dt@kernel.org, devicetree@vger.kernel.org, festevam@gmail.com, helgaas@kernel.org, hongxing.zhu@nxp.com, imx@lists.linux.dev, kernel@pengutronix.de, krzysztof.kozlowski+dt@linaro.org, kw@linux.com, l.stach@pengutronix.de, linux-arm-kernel@lists.infradead.org, linux-imx@nxp.com, linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org, lpieralisi@kernel.org, robh@kernel.org, s.hauer@pengutronix.de, shawnguo@kernel.org Subject: Re: [PATCH v7 04/16] dt-bindings: imx6q-pcie: Add linux,pci-domain as required for iMX8MQ Date: Sun, 7 Jan 2024 00:38:10 -0500 [thread overview] Message-ID: <ZZo4wkHf4RE2O9UN@lizhi-Precision-Tower-5810> (raw) In-Reply-To: <20240107051917.GG3416@thinkpad> On Sun, Jan 07, 2024 at 10:49:17AM +0530, Manivannan Sadhasivam wrote: > 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@nxp.com> > > > > --- > > > > > > > > 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. More than 2 controller need require "linux,pci-domain". > > > > 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. Yes, but it will be off topic of this patch serial. I can submit new patches for this later. After all dts changed, then I remove this conditional check. This patch serial is already quite big, (17 patches). And I don't want to involve new DTB check warning. Frank > > - 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 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2024-01-07 5:38 UTC|newest] Thread overview: 96+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-12-27 18:27 [PATCH v7 00/16] PCI: imx6: Clean up and add imx95 pci support Frank Li 2023-12-27 18:27 ` Frank Li 2023-12-27 18:27 ` [PATCH v7 01/16] PCI: imx6: Simplify clock handling by using bulk_clk_*() function Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-02 8:47 ` Marco Felsch 2024-01-02 8:47 ` Marco Felsch 2024-01-03 17:02 ` Frank Li 2024-01-03 17:02 ` Frank Li 2024-01-04 10:07 ` Marco Felsch 2024-01-04 10:07 ` Marco Felsch 2024-01-06 15:27 ` Manivannan Sadhasivam 2024-01-06 15:27 ` Manivannan Sadhasivam 2024-01-06 16:48 ` Frank Li 2024-01-06 16:48 ` Frank Li 2024-01-07 3:02 ` Manivannan Sadhasivam 2024-01-07 3:02 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 02/16] PCI: imx6: Simplify phy handling by using by using IMX6_PCIE_FLAG_HAS_PHY Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-06 15:33 ` Manivannan Sadhasivam 2024-01-06 15:33 ` Manivannan Sadhasivam 2024-01-06 16:50 ` Frank Li 2024-01-06 16:50 ` Frank Li 2024-01-07 3:04 ` Manivannan Sadhasivam 2024-01-07 3:04 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 03/16] PCI: imx6: Simplify reset handling by using by using *_FLAG_HAS_*_RESET Frank Li 2023-12-27 18:27 ` Frank Li 2023-12-27 18:27 ` [PATCH v7 04/16] dt-bindings: imx6q-pcie: Add linux,pci-domain as required for iMX8MQ Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 3:15 ` Manivannan Sadhasivam 2024-01-07 3:15 ` Manivannan Sadhasivam 2024-01-07 4:47 ` Frank Li 2024-01-07 4:47 ` Frank Li 2024-01-07 5:19 ` Manivannan Sadhasivam 2024-01-07 5:19 ` Manivannan Sadhasivam 2024-01-07 5:38 ` Frank Li [this message] 2024-01-07 5:38 ` Frank Li 2024-01-07 6:29 ` Manivannan Sadhasivam 2024-01-07 6:29 ` Manivannan Sadhasivam 2024-01-09 3:49 ` Rob Herring 2024-01-09 3:49 ` Rob Herring 2024-01-09 3:49 ` Rob Herring 2024-01-09 3:49 ` Rob Herring 2023-12-27 18:27 ` [PATCH v7 05/16] PCI: imx6: Using "linux,pci-domain" as slot ID Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 3:22 ` Manivannan Sadhasivam 2024-01-07 3:22 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 06/16] PCI: imx6: Simplify ltssm_enable() by using ltssm_off and ltssm_mask Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 3:24 ` Manivannan Sadhasivam 2024-01-07 3:24 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 07/16] PCI: imx6: Simplify configure_type() by using mode_off and mode_mask Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 5:16 ` Manivannan Sadhasivam 2024-01-07 5:16 ` Manivannan Sadhasivam 2024-01-07 5:32 ` Frank Li 2024-01-07 5:32 ` Frank Li 2024-01-07 5:35 ` Manivannan Sadhasivam 2024-01-07 5:35 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 08/16] PCI: imx6: Simplify switch-case logic by involve init_phy callback Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 5:33 ` Manivannan Sadhasivam 2024-01-07 5:33 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 09/16] dt-bindings: imx6q-pcie: Clean up irrationality clocks check Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 5:34 ` Manivannan Sadhasivam 2024-01-07 5:34 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 10/16] dt-bindings: imx6q-pcie: restruct reg and reg-name Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 5:35 ` Manivannan Sadhasivam 2024-01-07 5:35 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 11/16] dt-bindings: imx6q-pcie: Add imx95 pcie compatible string Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-02 16:03 ` Rob Herring 2024-01-02 16:03 ` Rob Herring 2023-12-27 18:27 ` [PATCH v7 12/16] PCI: imx6: Add iMX95 PCIe support Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 5:51 ` Manivannan Sadhasivam 2024-01-07 5:51 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 13/16] PCI: imx6: Clean up get addr_space code Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 5:55 ` Manivannan Sadhasivam 2024-01-07 5:55 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 14/16] PCI: imx6: Add epc_features in imx6_pcie_drvdata Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 6:16 ` Manivannan Sadhasivam 2024-01-07 6:16 ` Manivannan Sadhasivam 2023-12-27 18:27 ` [PATCH v7 15/16] dt-bindings: imx6q-pcie: Add iMX95 pcie endpoint compatible string Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-09 3:53 ` Rob Herring 2024-01-09 3:53 ` Rob Herring 2023-12-27 18:27 ` [PATCH v7 16/16] PCI: imx6: Add iMX95 Endpoint (EP) function support Frank Li 2023-12-27 18:27 ` Frank Li 2024-01-07 6:26 ` Manivannan Sadhasivam 2024-01-07 6:26 ` Manivannan Sadhasivam 2024-01-08 17:39 ` Frank Li 2024-01-08 17:39 ` Frank Li
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