Re: [PATCH v11 1/3] dt-bindings: PCI: intel: Add YAML schemas for the PCIe RC controller

[Dilip Kota]

On 12/20/2019 12:32 AM, Rob Herring wrote:
> On Sun, Dec 8, 2019 at 9:20 PM Dilip Kota <eswara.kota@xxxxxxxxxxxxxxx> wrote:
> > Add YAML schemas for PCIe RC controller on Intel Gateway SoCs
> > which is Synopsys DesignWare based PCIe core.
> >
> > Signed-off-by: Dilip Kota <eswara.kota@xxxxxxxxxxxxxxx>
> > Signed-off-by: Lorenzo Pieralisi <lorenzo.pieralisi@xxxxxxx>
> > Reviewed-by: Andrew Murray <andrew.murray@xxxxxxx>
> > Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
> > ---
> >   .../devicetree/bindings/pci/intel-gw-pcie.yaml     | 138 +++++++++++++++++++++
> >   1 file changed, 138 insertions(+)
> >   create mode 100644 Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml b/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
> > new file mode 100644
> > index 000000000000..db605d8a387d
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pci/intel-gw-pcie.yaml
> > @@ -0,0 +1,138 @@
> > +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/pci/intel-gw-pcie.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: PCIe RC controller on Intel Gateway SoCs
> > +
> > +maintainers:
> > +  - Dilip Kota <eswara.kota@xxxxxxxxxxxxxxx>
> > +
> > +properties:
> > +  compatible:
> > +    items:
> > +      - const: intel,lgm-pcie
> > +      - const: snps,dw-pcie
> > +
> > +  device_type:
> > +    const: pci
> > +
> > +  "#address-cells":
> > +    const: 3
> > +
> > +  "#size-cells":
> > +    const: 2
> > +
> > +  reg:
> > +    items:
> > +      - description: Controller control and status registers.
> > +      - description: PCIe configuration registers.
> > +      - description: Controller application registers.
> > +
> > +  reg-names:
> > +    items:
> > +      - const: dbi
> > +      - const: config
> > +      - const: app
> > +
> > +  ranges:
> > +    maxItems: 1
> > +
> > +  resets:
> > +    maxItems: 1
> > +
> > +  clocks:
> > +    maxItems: 1
> > +
> > +  phys:
> > +    maxItems: 1
> > +
> > +  phy-names:
> > +    const: pcie
> > +
> > +  reset-gpios:
> > +    maxItems: 1
> > +
> > +  linux,pci-domain: true
> > +
> > +  num-lanes:
> > +    maximum: 2
> > +    description: Number of lanes to use for this port.
> > +
> > +  '#interrupt-cells':
> > +    const: 1
> > +
> > +  interrupt-map-mask:
> > +    description: Standard PCI IRQ mapping properties.
> > +
> > +  interrupt-map:
> > +    description: Standard PCI IRQ mapping properties.
> > +
> > +  max-link-speed:
> > +    description: Specify PCI Gen for link capability.
> > +    allOf:
> > +      - $ref: /schemas/types.yaml#/definitions/uint32
> > +      - enum: [ 1, 2, 3, 4 ]
> > +      - default: 1
> > +
> > +  bus-range:
> > +    description: Range of bus numbers associated with this controller.
> > +
> > +  reset-assert-ms:
> > +    description: |
> > +      Delay after asserting reset to the PCIe device.
> > +    maximum: 500
> > +    default: 100
> > +
> > +required:
> > +  - compatible
> > +  - device_type
> > +  - "#address-cells"
> > +  - "#size-cells"
> > +  - reg
> > +  - reg-names
> > +  - ranges
> > +  - resets
> > +  - clocks
> > +  - phys
> > +  - phy-names
> > +  - reset-gpios
> > +  - '#interrupt-cells'
> > +  - interrupt-map
> > +  - interrupt-map-mask
> > +
> > +additionalProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/gpio/gpio.h>
> > +    #include <dt-bindings/clock/intel,lgm-clk.h>
> I guess this is applied now as the example fails to build in
> linux-next as this header is missing.
>
> At this point I'd settle for just 'make dt_binding_check' passing on
> linux-next even though it should pass on maintainer trees too.
> However, it doesn't appear the clock driver with this header is close
> to being merged. The binding was sent on Aug 28 and not to the DT list
> so I hadn't seen it. Given that, I'd suggest a follow-up patch to
> remove the header dependency here. Just change LGM_GCLK_PCIE10 to the
> value.
Sure, i will send the patch.

Regards,
Dilip
> > +    pcie10: pcie@d0e00000 {
> > +      compatible = "intel,lgm-pcie", "snps,dw-pcie";
> > +      device_type = "pci";
> > +      #address-cells = <3>;
> > +      #size-cells = <2>;
> > +      reg = <0xd0e00000 0x1000>,
> > +            <0xd2000000 0x800000>,
> > +            <0xd0a41000 0x1000>;
> > +      reg-names = "dbi", "config", "app";
> > +      linux,pci-domain = <0>;
> > +      max-link-speed = <4>;
> > +      bus-range = <0x00 0x08>;
> > +      interrupt-parent = <&ioapic1>;
> > +      #interrupt-cells = <1>;
> > +      interrupt-map-mask = <0 0 0 0x7>;
> > +      interrupt-map = <0 0 0 1 &ioapic1 27 1>,
> > +                      <0 0 0 2 &ioapic1 28 1>,
> > +                      <0 0 0 3 &ioapic1 29 1>,
> > +                      <0 0 0 4 &ioapic1 30 1>;
> > +      ranges = <0x02000000 0 0xd4000000 0xd4000000 0 0x04000000>;
> > +      resets = <&rcu0 0x50 0>;
> > +      clocks = <&cgu0 LGM_GCLK_PCIE10>;
> > +      phys = <&cb0phy0>;
> > +      phy-names = "pcie";
> > +      reset-assert-ms = <500>;
> > +      reset-gpios = <&gpio0 3 GPIO_ACTIVE_LOW>;
> > +      num-lanes = <2>;
> > +    };
> > --
> > 2.11.0