Re: [PATCH v2 1/5] dt-bindings: pci: Add ARTPEC-8 PCIe controller

Krzysztof Kozlowski
2022-06-06T10:17:04Z

On 03/06/2022 04:23, Wangseok Lee wrote:
> Add description to support Axis, ARTPEC-8 SoC.
> ARTPEC-8 is the SoC platform of Axis Communications
> and PCIe controller is designed based on Design-Ware PCIe controller.
>
> changes since v1 :

Changelog goes after --- .

> -'make dt_binding_check' result improvement
> -Add the missing property list
> -Align the indentation of continued lines/entries
>
> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
> ---
> .../bindings/pci/axis,artpec8-pcie-ep.yaml | 108 ++++++++++++++++++
> .../devicetree/bindings/pci/axis,artpec8-pcie.yaml | 123 +++++++++++++++++++++
> 2 files changed, 231 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
> create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
>
> diff --git a/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
> new file mode 100644
> index 0000000..3512e38
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
> @@ -0,0 +1,108 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/axis,artpec8-pcie-ep.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ARTPEC-8 SoC PCIe Controller Device Tree Bindings

s/Device Tree Bindings//

> +
> +maintainers:
> + - Jesper Nilsson <jesper.nilsson@axis.com>
> +
> +description: |+
> + This PCIe end-point controller is based on the Synopsys DesignWare PCIe IP
> + and thus inherits all the common properties defined in snps,dw-pcie-ep.yaml.
> +
> +allOf:
> + - $ref: /schemas/pci/snps,dw-pcie-ep.yaml#
> +
> +properties:
> + compatible:
> + const: axis,artpec8-pcie-ep
> +
> + reg:
> + items:
> + - description: Data Bus Interface (DBI) registers.
> + - description: Data Bus Interface (DBI2) registers.
> + - description: PCIe address space region.
> +
> + reg-names:
> + items:
> + - const: dbi
> + - const: dbi2
> + - const: addr_space
> +
> + interrupts:
> + maxItems: 1
> +
> + interrupts-names:
> + items:
> + - const: intr

Remove the interrupts-names entirely, no need for single item with
generic name.

> +
> + clocks:
> + items:
> + - description: PIPE clock, used by the controller to clock the PIPE
> + - description: PCIe dbi clock, ungated version
> + - description: PCIe master clock, ungated version
> + - description: PCIe slave clock, ungated version
> +
> + clock-names:
> + items:
> + - const: pipe_clk
> + - const: dbi_clk
> + - const: mstr_clk
> + - const: slv_clk

Remove "_clk" suffix from all entries.

> +
> + phys:
> + maxItems: 1
> +
> + phy-names:
> + items:
> + - const: pcie_phy

Remove the phy-names entirely, no need for single item with generic name.

> +
> + num-lanes:
> + const: 2
> +
> +required:

My comment was not applied here, so please fix it.

> + - reg
> + - reg-names
> + - interrupts
> + - interrupt-names
> + - clocks
> + - clock-names
> + - phys
> + - num-lanes
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + artpec8 {

Generic nodes please. Did you see "artpec8" or something like this in
any DTS?

> + #address-cells = <2>;
> + #size-cells = <2>;
> + pcie_ep: pcie-ep@17200000 {
> + compatible = "axis,artpec8-pcie-ep";
> + reg = <0x0 0x17200000 0x0 0x1000>,
> + <0x0 0x17201000 0x0 0x1000>,
> + <0x2 0x00000000 0x6 0x00000000>;
> + reg-names = "dbi", "dbi2", "addr_space";
> + #interrupt-cells = <1>;
> + interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "intr";
> + clocks = <&clock_cmu_fsys 39>,
> + <&clock_cmu_fsys 38>,
> + <&clock_cmu_fsys 37>,
> + <&clock_cmu_fsys 36>;
> + clock-names = "pipe_clk", "dbi_clk", "mstr_clk", "slv_clk";
> + phys = <&pcie_phy>;
> + phy-names = "pcie_phy";
> + num-lanes = <2>;
> + bus-range = <0x00 0xff>;
> + num-ib-windows = <16>;
> + num-ob-windows = <16>;
> + };
> + };

> +...
> diff --git a/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
> new file mode 100644
> index 0000000..945a061
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
> @@ -0,0 +1,123 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/axis,artpec8-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Artpec-8 SoC PCIe Controller Device Tree Bindings

Ditto

> +
> +maintainers:
> + - Jesper Nilsson <jesper.nilsson@axis.com>
> +
> +description: |+
> + 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.
> +
> +allOf:
> + - $ref: /schemas/pci/snps,dw-pcie.yaml#
> +
> +properties:
> + compatible:
> + const: axis,artpec8-pcie
> +
> + reg:
> + items:
> + - description: Data Bus Interface (DBI) registers.
> + - description: External Local Bus interface (ELBI) registers.
> + - description: PCIe configuration space region.
> +
> + reg-names:
> + items:
> + - const: dbi
> + - const: elbi
> + - const: config
> +
> + device_type:
> + items:

It's not a list, but just a string. No need for items.

> + - const: pci
> +
> + ranges:
> + maxItems: 2
> +
> + num-lanes:
> + const: 2
> +
> + interrupts:
> + maxItems: 1
> +
> + interrupts-names:
> + items:
> + - const: intr

Remove entire property.

> +
> + clocks:
> + items:
> + - description: PIPE clock, used by the controller to clock the PIPE
> + - description: PCIe dbi clock, ungated version
> + - description: PCIe master clock, ungated version
> + - description: PCIe slave clock, ungated version
> +
> + clock-names:
> + items:
> + - const: pipe_clk
> + - const: dbi_clk
> + - const: mstr_clk
> + - const: slv_clk

Remove suffix.

> +
> + phys:
> + maxItems: 1
> +
> + phy-names:
> + items:
> + - const: pcie_phy

Remove entire property.

> +
> +required:

Previous comment not applied.

> + - reg
> + - reg-names
> + - device_type
> + - ranges
> + - num-lanes
> + - interrupts
> + - interrupt-names
> + - clocks
> + - clock-names
> + - phys
> + - phy-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + artpec8 {

Same as previous patch.

> + #address-cells = <2>;
> + #size-cells = <2>;
> + pcie: pcie@17200000 {
> + compatible = "axis,artpec8-pcie";
> + reg = <0x0 0x17200000 0x0 0x1000>,
> + <0x0 0x16ca0000 0x0 0x2000>,
> + <0x7 0x0001e000 0x0 0x2000>;
> + reg-names = "dbi", "elbi", "config";
> + #address-cells = <3>;
> + #size-cells = <2>;
> + device_type = "pci";
> + ranges = </* non-prefetchable memory */
> + 0x83000000 0x0 0x0000000 0x2 0x00000000 0x5 0x00000000
> + /* downstream I/O */
> + 0x81000000 0x0 0x0000000 0x7 0x00000000 0x0 0x00010000>;
> + num-lanes = <2>;
> + bus-range = <0x00 0xff>;
> + interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "intr";
> + #interrupt-cells = <1>;
> + clocks = <&cmu_fsys 39>,
> + <&cmu_fsys 38>,
> + <&cmu_fsys 37>,
> + <&cmu_fsys 36>;
> + clock-names = "pipe_clk", "dbi_clk", "mstr_clk", "slv_clk";
> + phys = <&pcie_phy>;
> + phy-names = "pcie_phy";
> + };
> + };
> +...

Best regards,
Krzysztof