Hi Serge,
> From: Serge Semin, Sent: Tuesday, March 21, 2023 8:36 PM
>
> On Fri, Mar 10, 2023 at 09:35:00PM +0900, Yoshihiro Shimoda wrote:
> > Document bindings for Renesas R-Car Gen4 and R-Car S4-8 (R8A779F0)
> > PCIe host module.
> >
> > Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> > Reviewed-by: Rob Herring <robh@xxxxxxxxxx>
>
> Looks good.
> Reviewed-by: Serge Semin <fancer.lancer@xxxxxxxxx>
Thank you for your review!
> > ---
> > .../bindings/pci/rcar-gen4-pci-host.yaml | 108 ++++++++++++++++++
> > 1 file changed, 108 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
> b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
> > new file mode 100644
> > index 000000000000..d838d7c50410
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/pci/rcar-gen4-pci-host.yaml
> > @@ -0,0 +1,108 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +# Copyright (C) 2022 Renesas Electronics Corp.
> > +%YAML 1.2
> > +---
> > +$id:
<snip>
> > +$schema:
<snip>
> > +
> > +title: Renesas R-Car Gen4 PCIe Host
> > +
> > +maintainers:
> > + - Yoshihiro Shimoda <yoshihiro.shimoda.uh@xxxxxxxxxxx>
> > +
> > +allOf:
> > + - $ref: snps,dw-pcie.yaml#
> > +
> > +properties:
> > + compatible:
> > + items:
> > + - const: renesas,r8a779f0-pcie # R-Car S4-8
> > + - const: renesas,rcar-gen4-pcie # R-Car Gen4
> > +
> > + reg:
> > + maxItems: 5
> > +
> > + reg-names:
> > + items:
> > + - const: dbi
> > + - const: atu
> > + - const: dma
> > + - const: app
> > + - const: config
> > +
> > + interrupts:
> > + maxItems: 4
> > +
> > + interrupt-names:
> > + items:
> > + - const: msi
> > + - const: dma
> > + - const: sft_ce
>
> > + - const: app
>
> Just curious what is this IRQ used for?
The pcie-rcar-gen4 drivers (host and endpoint) doesn't use this IRQ,
But the hardware issues the IRQ when it receives a vendor defined message
from remote device.
Best regards,
Yoshihiro Shimoda
> -Serge(y)
>
> > +
> > + clocks:
> > + maxItems: 1
> > +
> > + power-domains:
> > + maxItems: 1
> > +
> > + resets:
> > + maxItems: 1
> > +
> > + max-link-speed:
> > + maximum: 4
> > +
> > + num-lanes:
> > + maximum: 4
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - interrupts
> > + - clocks
> > + - power-domains
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/clock/r8a779f0-cpg-mssr.h>
> > + #include <dt-bindings/interrupt-controller/arm-gic.h>
> > + #include <dt-bindings/power/r8a779f0-sysc.h>
> > +
> > + soc {
> > + #address-cells = <2>;
> > + #size-cells = <2>;
> > +
> > + pcie: pcie@e65d0000 {
> > + compatible = "renesas,r8a779f0-pcie", "renesas,rcar-gen4-pcie";
> > + reg = <0 0xe65d0000 0 0x3000>, <0 0xe65d3000 0 0x2000>,
> > + <0 0xe65d5000 0 0x1200>, <0 0xe65d6200 0 0x0e00>,
> > + <0 0xfe000000 0 0x400000>;
> > + reg-names = "dbi", "atu", "dma", "app", "config";
> > + #address-cells = <3>;
> > + #size-cells = <2>;
> > + bus-range = <0x00 0xff>;
> > + device_type = "pci";
> > + ranges = <0x81000000 0 0x00000000 0 0xfe000000 0 0x00400000
> > + 0x82000000 0 0x30000000 0 0x30000000 0 0x10000000>;
> > + dma-ranges = <0x42000000 0 0x40000000 0 0x40000000 0 0x80000000>;
> > + interrupts = <GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>,
> > + <GIC_SPI 417 IRQ_TYPE_LEVEL_HIGH>,
> > + <GIC_SPI 418 IRQ_TYPE_LEVEL_HIGH>,
> > + <GIC_SPI 422 IRQ_TYPE_LEVEL_HIGH>;
> > + interrupt-names = "msi", "dma", "sft_ce", "app";
> > + #interrupt-cells = <1>;
> > + interrupt-map-mask = <0 0 0 7>;
> > + interrupt-map = <0 0 0 1 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH
> > + 0 0 0 2 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH
> > + 0 0 0 3 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH
> > + 0 0 0 4 &gic GIC_SPI 416 IRQ_TYPE_LEVEL_HIGH>;
> > + clocks = <&cpg CPG_MOD 624>;
> > + power-domains = <&sysc R8A779F0_PD_ALWAYS_ON>;
> > + resets = <&cpg 624>;
> > + num-lanes = <2>;
> > + snps,enable-cdm-check;
> > + max-link-speed = <2>;
> > + };
> > + };
> > --
> > 2.25.1
> >
> >
