linux-kernel - Re: [PATCH 3/4] arm64: dts: meson-axg: add PCIe nodes

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Message-ID: <CAFBinCDLF2bL6sQFBsNTNZV5i9u+KW01O3SqbR=riRru5d8zRQ@mail.gmail.com>
Date:   Sun, 22 Nov 2020 23:14:37 +0100
From:   Martin Blumenstingl <martin.blumenstingl@...glemail.com>
To:     Neil Armstrong <narmstrong@...libre.com>
Cc:     khilman@...libre.com, linux-amlogic@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [PATCH 3/4] arm64: dts: meson-axg: add PCIe nodes

Hi Neil,

(I have to admit that for me the PCI(e) bindings are very complex, so
I may be mixing up things. I am still sending this review mail because
"you're doing it different than in meson-g12-common.dtsi")

On Fri, Nov 20, 2020 at 4:33 PM Neil Armstrong <narmstrong@...libre.com> wrote:
[...]
> +               pcieA: pcie@...00000 {
> +                       compatible = "amlogic,axg-pcie", "snps,dw-pcie";
> +                       reg = <0x0 0xf9800000 0x0 0x400000>,
> +                             <0x0 0xff646000 0x0 0x2000>,
> +                             <0x0 0xf9f00000 0x0 0x100000>;
> +                       reg-names = "elbi", "cfg", "config";
> +                       interrupts = <GIC_SPI 177 IRQ_TYPE_EDGE_RISING>;
> +                       #interrupt-cells = <1>;
> +                       interrupt-map-mask = <0 0 0 0>;
> +                       interrupt-map = <0 0 0 0 &gic GIC_SPI 179 IRQ_TYPE_EDGE_RISING>;
> +                       bus-range = <0x0 0xff>;
> +                       #address-cells = <3>;
> +                       #size-cells = <2>;
> +                       device_type = "pci";
> +                       ranges = <0x82000000 0 0xf9c00000 0x0 0xf9c00000 0 0x00300000>;
only PCI IO space here, no PCI MEM space?

[...]
> +               pcieB: pcie@...00000 {
> +                       compatible = "amlogic,axg-pcie", "snps,dw-pcie";
> +                       reg = <0x0 0xfa000000 0x0 0x400000>,
> +                             <0x0 0xff648000 0x0 0x2000>,
> +                             <0x0 0xfa400000 0x0 0x100000>;
> +                       reg-names = "elbi", "cfg", "config";
> +                       interrupts = <GIC_SPI 167 IRQ_TYPE_EDGE_RISING>;
> +                       #interrupt-cells = <1>;
> +                       interrupt-map-mask = <0 0 0 0>;
> +                       interrupt-map = <0 0 0 0 &gic GIC_SPI 169 IRQ_TYPE_EDGE_RISING>;
> +                       bus-range = <0x0 0xff>;
> +                       #address-cells = <3>;
> +                       #size-cells = <2>;
> +                       device_type = "pci";
> +                       ranges = <0x82000000 0 0xfa500000 0x0 0xfa500000 0 0x00300000>;
same as above: only PCI IO space here, no PCI MEM space?


Best regards,
Martin