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Message-ID: <20240208-subfloor-polka-96bbbbc27fb0@spud>
Date: Thu, 8 Feb 2024 19:26:15 +0000
From: Conor Dooley <conor@...nel.org>
To: Frank Li <Frank.Li@....com>
Cc: Bjorn Helgaas <bhelgaas@...gle.com>,
Lorenzo Pieralisi <lpieralisi@...nel.org>,
Krzysztof Wilczyński <kw@...ux.com>,
Rob Herring <robh@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
Conor Dooley <conor+dt@...nel.org>,
"open list:PCI SUBSYSTEM" <linux-pci@...r.kernel.org>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" <devicetree@...r.kernel.org>,
open list <linux-kernel@...r.kernel.org>, imx@...ts.linux.dev
Subject: Re: [PATCH v2 1/1] dt-bindings: pci: layerscape-pci: Convert to yaml
file
On Wed, Feb 07, 2024 at 06:15:49PM -0500, Frank Li wrote:
> Convert layerscape pcie bind document to yaml file.
>
> Signed-off-by: Frank Li <Frank.Li@....com>
Please don't send new versions before giving people a chance to finish
the discussion on the existing ones. This is not the first time in the
last few days I am asking you this. Nobody pays me to review DT
bindings, so you'll have to accept that I will take some time to reply.
Thanks,
Conor.
> ---
>
> Notes:
> Change from v1 to v2
> - remove '|-'
> - dma-coherent: true
> - add interrupts and interrupt-names at before Allof
> - remove ref to snps,pcie*.yaml, some reg-names are not aligned with in
> drivers
> - Add an example for pcie-ep
>
> .../bindings/pci/fsl,layerscape-pcie-ep.yaml | 102 +++++++++++
> .../bindings/pci/fsl,layerscape-pcie.yaml | 167 ++++++++++++++++++
> .../bindings/pci/layerscape-pci.txt | 79 ---------
> 3 files changed, 269 insertions(+), 79 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/pci/fsl,layerscape-pcie-ep.yaml
> create mode 100644 Documentation/devicetree/bindings/pci/fsl,layerscape-pcie.yaml
> delete mode 100644 Documentation/devicetree/bindings/pci/layerscape-pci.txt
>
> diff --git a/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie-ep.yaml
> new file mode 100644
> index 0000000000000..399efa7364c93
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie-ep.yaml
> @@ -0,0 +1,102 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/fsl,layerscape-pcie-ep.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale Layerscape PCIe Endpoint(EP) controller
> +
> +maintainers:
> + - Frank Li <Frank.Li@....com>
> +
> +description:
> + This PCIe EP controller is based on the Synopsys DesignWare PCIe IP.
> +
> + This controller derives its clocks from the Reset Configuration Word (RCW)
> + which is used to describe the PLL settings at the time of chip-reset.
> +
> + Also as per the available Reference Manuals, there is no specific 'version'
> + register available in the Freescale PCIe controller register set,
> + which can allow determining the underlying DesignWare PCIe controller version
> + information.
> +
> +properties:
> + compatible:
> + enum:
> + - fsl,ls2088a-pcie-ep
> + - fsl,ls1088a-pcie-ep
> + - fsl,ls1046a-pcie-ep
> + - fsl,ls1028a-pcie-ep
> + - fsl,lx2160ar2-pcie-ep
> +
> + reg:
> + maxItems: 2
> +
> + reg-names:
> + items:
> + - const: regs
> + - const: addr_space
> +
> + fsl,pcie-scfg:
> + $ref: /schemas/types.yaml#/definitions/phandle
> + description: A phandle to the SCFG device node. The second entry is the
> + physical PCIe controller index starting from '0'. This is used to get
> + SCFG PEXN registers.
> +
> + big-endian:
> + $ref: /schemas/types.yaml#/definitions/flag
> + description: If the PEX_LUT and PF register block is in big-endian, specify
> + this property.
> +
> + dma-coherent: true
> +
> + interrupts:
> + minItems: 1
> + maxItems: 2
> +
> + interrupt-names:
> + minItems: 1
> + maxItems: 2
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> +
> +allOf:
> + - if:
> + properties:
> + compatible:
> + enum:
> + - fsl,ls1028a-pcie-ep
> + - fsl,ls1046a-pcie-ep
> + - fsl,ls1088a-pcie-ep
> + then:
> + properties:
> + interrupt-names:
> + items:
> + - const: pme
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + soc {
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + pcie_ep1: pcie-ep@...0000 {
> + compatible = "fsl,ls1028a-pcie-ep";
> + reg = <0x00 0x03400000 0x0 0x00100000
> + 0x80 0x00000000 0x8 0x00000000>;
> + reg-names = "regs", "addr_space";
> + interrupts = <GIC_SPI 108 IRQ_TYPE_LEVEL_HIGH>; /* PME interrupt */
> + interrupt-names = "pme";
> + num-ib-windows = <6>;
> + num-ob-windows = <8>;
> + status = "disabled";
> + };
> + };
> +...
> diff --git a/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie.yaml b/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie.yaml
> new file mode 100644
> index 0000000000000..793986c5af7ff
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/fsl,layerscape-pcie.yaml
> @@ -0,0 +1,167 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/fsl,layerscape-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale Layerscape PCIe Root Complex(RC) controller
> +
> +maintainers:
> + - Frank Li <Frank.Li@....com>
> +
> +description:
> + This PCIe RC controller is based on the Synopsys DesignWare PCIe IP
> +
> + This controller derives its clocks from the Reset Configuration Word (RCW)
> + which is used to describe the PLL settings at the time of chip-reset.
> +
> + Also as per the available Reference Manuals, there is no specific 'version'
> + register available in the Freescale PCIe controller register set,
> + which can allow determining the underlying DesignWare PCIe controller version
> + information.
> +
> +properties:
> + compatible:
> + enum:
> + - fsl,ls1021a-pcie
> + - fsl,ls2080a-pcie
> + - fsl,ls2085a-pcie
> + - fsl,ls2088a-pcie
> + - fsl,ls1088a-pcie
> + - fsl,ls1046a-pcie
> + - fsl,ls1043a-pcie
> + - fsl,ls1012a-pcie
> + - fsl,ls1028a-pcie
> + - fsl,lx2160a-pcie
> +
> + reg:
> + maxItems: 2
> +
> + reg-names:
> + items:
> + - const: regs
> + - const: config
> +
> + fsl,pcie-scfg:
> + $ref: /schemas/types.yaml#/definitions/phandle
> + description: A phandle to the SCFG device node. The second entry is the
> + physical PCIe controller index starting from '0'. This is used to get
> + SCFG PEXN registers.
> +
> + big-endian:
> + $ref: /schemas/types.yaml#/definitions/flag
> + description: If the PEX_LUT and PF register block is in big-endian, specify
> + this property.
> +
> + dma-coherent: true
> +
> + msi-parent: true
> +
> + iommu-map: true
> +
> + interrupts:
> + minItems: 1
> + maxItems: 2
> +
> + interrupt-names:
> + minItems: 1
> + maxItems: 2
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> + - "#address-cells"
> + - "#size-cells"
> + - device_type
> + - bus-range
> + - ranges
> + - interrupts
> + - interrupt-names
> + - "#interrupt-cells"
> + - interrupt-map-mask
> + - interrupt-map
> +
> +allOf:
> + - $ref: /schemas/pci/pci-bus.yaml#
> +
> + - if:
> + properties:
> + compatible:
> + enum:
> + - fsl,ls1028a-pcie
> + - fsl,ls1046a-pcie
> + - fsl,ls1043a-pcie
> + - fsl,ls1012a-pcie
> + then:
> + properties:
> + interrupts:
> + maxItems: 2
> + interrupt-names:
> + items:
> + - const: pme
> + - const: aer
> +
> + - if:
> + properties:
> + compatible:
> + enum:
> + - fsl,ls2080a-pcie
> + - fsl,ls2085a-pcie
> + - fsl,ls2088a-pcie
> + then:
> + properties:
> + interrupts:
> + maxItems: 1
> + interrupt-names:
> + items:
> + - const: intr
> +
> + - if:
> + properties:
> + compatible:
> + enum:
> + - fsl,ls1088a-pcie
> + then:
> + properties:
> + interrupts:
> + maxItems: 1
> + interrupt-names:
> + items:
> + - const: aer
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + soc {
> + #address-cells = <2>;
> + #size-cells = <2>;
> +
> + pcie@...0000 {
> + compatible = "fsl,ls1088a-pcie";
> + reg = <0x00 0x03400000 0x0 0x00100000>, /* controller registers */
> + <0x20 0x00000000 0x0 0x00002000>; /* configuration space */
> + reg-names = "regs", "config";
> + interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>; /* aer interrupt */
> + interrupt-names = "aer";
> + #address-cells = <3>;
> + #size-cells = <2>;
> + dma-coherent;
> + device_type = "pci";
> + bus-range = <0x0 0xff>;
> + ranges = <0x81000000 0x0 0x00000000 0x20 0x00010000 0x0 0x00010000 /* downstream I/O */
> + 0x82000000 0x0 0x40000000 0x20 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
> + msi-parent = <&its>;
> + #interrupt-cells = <1>;
> + interrupt-map-mask = <0 0 0 7>;
> + interrupt-map = <0000 0 0 1 &gic 0 0 0 109 IRQ_TYPE_LEVEL_HIGH>,
> + <0000 0 0 2 &gic 0 0 0 110 IRQ_TYPE_LEVEL_HIGH>,
> + <0000 0 0 3 &gic 0 0 0 111 IRQ_TYPE_LEVEL_HIGH>,
> + <0000 0 0 4 &gic 0 0 0 112 IRQ_TYPE_LEVEL_HIGH>;
> + iommu-map = <0 &smmu 0 1>; /* Fixed-up by bootloader */
> + };
> + };
> +...
> diff --git a/Documentation/devicetree/bindings/pci/layerscape-pci.txt b/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> deleted file mode 100644
> index ee8a4791a78b4..0000000000000
> --- a/Documentation/devicetree/bindings/pci/layerscape-pci.txt
> +++ /dev/null
> @@ -1,79 +0,0 @@
> -Freescale Layerscape PCIe controller
> -
> -This PCIe host controller is based on the Synopsys DesignWare PCIe IP
> -and thus inherits all the common properties defined in snps,dw-pcie.yaml.
> -
> -This controller derives its clocks from the Reset Configuration Word (RCW)
> -which is used to describe the PLL settings at the time of chip-reset.
> -
> -Also as per the available Reference Manuals, there is no specific 'version'
> -register available in the Freescale PCIe controller register set,
> -which can allow determining the underlying DesignWare PCIe controller version
> -information.
> -
> -Required properties:
> -- compatible: should contain the platform identifier such as:
> - RC mode:
> - "fsl,ls1021a-pcie"
> - "fsl,ls2080a-pcie", "fsl,ls2085a-pcie"
> - "fsl,ls2088a-pcie"
> - "fsl,ls1088a-pcie"
> - "fsl,ls1046a-pcie"
> - "fsl,ls1043a-pcie"
> - "fsl,ls1012a-pcie"
> - "fsl,ls1028a-pcie"
> - EP mode:
> - "fsl,ls1028a-pcie-ep", "fsl,ls-pcie-ep"
> - "fsl,ls1046a-pcie-ep", "fsl,ls-pcie-ep"
> - "fsl,ls1088a-pcie-ep", "fsl,ls-pcie-ep"
> - "fsl,ls2088a-pcie-ep", "fsl,ls-pcie-ep"
> - "fsl,lx2160ar2-pcie-ep", "fsl,ls-pcie-ep"
> -- reg: base addresses and lengths of the PCIe controller register blocks.
> -- interrupts: A list of interrupt outputs of the controller. Must contain an
> - entry for each entry in the interrupt-names property.
> -- interrupt-names: It could include the following entries:
> - "aer": Used for interrupt line which reports AER events when
> - non MSI/MSI-X/INTx mode is used
> - "pme": Used for interrupt line which reports PME events when
> - non MSI/MSI-X/INTx mode is used
> - "intr": Used for SoCs(like ls2080a, lx2160a, ls2080a, ls2088a, ls1088a)
> - which has a single interrupt line for miscellaneous controller
> - events(could include AER and PME events).
> -- fsl,pcie-scfg: Must include two entries.
> - The first entry must be a link to the SCFG device node
> - The second entry is the physical PCIe controller index starting from '0'.
> - This is used to get SCFG PEXN registers
> -- dma-coherent: Indicates that the hardware IP block can ensure the coherency
> - of the data transferred from/to the IP block. This can avoid the software
> - cache flush/invalid actions, and improve the performance significantly.
> -
> -Optional properties:
> -- big-endian: If the PEX_LUT and PF register block is in big-endian, specify
> - this property.
> -
> -Example:
> -
> - pcie@...0000 {
> - compatible = "fsl,ls1088a-pcie";
> - reg = <0x00 0x03400000 0x0 0x00100000>, /* controller registers */
> - <0x20 0x00000000 0x0 0x00002000>; /* configuration space */
> - reg-names = "regs", "config";
> - interrupts = <0 108 IRQ_TYPE_LEVEL_HIGH>; /* aer interrupt */
> - interrupt-names = "aer";
> - #address-cells = <3>;
> - #size-cells = <2>;
> - device_type = "pci";
> - dma-coherent;
> - num-viewport = <256>;
> - bus-range = <0x0 0xff>;
> - ranges = <0x81000000 0x0 0x00000000 0x20 0x00010000 0x0 0x00010000 /* downstream I/O */
> - 0x82000000 0x0 0x40000000 0x20 0x40000000 0x0 0x40000000>; /* non-prefetchable memory */
> - msi-parent = <&its>;
> - #interrupt-cells = <1>;
> - interrupt-map-mask = <0 0 0 7>;
> - interrupt-map = <0000 0 0 1 &gic 0 0 0 109 IRQ_TYPE_LEVEL_HIGH>,
> - <0000 0 0 2 &gic 0 0 0 110 IRQ_TYPE_LEVEL_HIGH>,
> - <0000 0 0 3 &gic 0 0 0 111 IRQ_TYPE_LEVEL_HIGH>,
> - <0000 0 0 4 &gic 0 0 0 112 IRQ_TYPE_LEVEL_HIGH>;
> - iommu-map = <0 &smmu 0 1>; /* Fixed-up by bootloader */
> - };
> --
> 2.34.1
>
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