linux-kernel - Re: [PATCH v2 6/6] riscv: dts: Add PCIe support for the SiFive FU740-C000 SoC

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Date:   Mon, 19 Apr 2021 10:43:28 +0800
From:   Greentime Hu <greentime.hu@...ive.com>
To:     Palmer Dabbelt <palmer@...belt.com>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>, hes@...ive.com,
        Erik Danie <erik.danie@...ive.com>,
        Zong Li <zong.li@...ive.com>,
        Bjorn Helgaas <bhelgaas@...gle.com>, robh+dt@...nel.org,
        Albert Ou <aou@...s.berkeley.edu>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Lorenzo Pieralisi <lorenzo.pieralisi@....com>,
        Philipp Zabel <p.zabel@...gutronix.de>, alex.dewar90@...il.com,
        khilman@...libre.com, hayashi.kunihiko@...ionext.com,
        vidyas@...dia.com, jh80.chung@...sung.com,
        linux-pci@...r.kernel.org, devicetree@...r.kernel.org,
        linux-riscv <linux-riscv@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        linux-clk@...r.kernel.org, Bjorn Helgaas <helgaas@...nel.org>
Subject: Re: [PATCH v2 6/6] riscv: dts: Add PCIe support for the SiFive
 FU740-C000 SoC

Palmer Dabbelt <palmer@...belt.com> 於 2021年3月31日 週三 上午8:24寫道：
>
> On Wed, 17 Mar 2021 23:08:13 PDT (-0700), greentime.hu@...ive.com wrote:
> > Signed-off-by: Greentime Hu <greentime.hu@...ive.com>
> > ---
> >  arch/riscv/boot/dts/sifive/fu740-c000.dtsi | 34 ++++++++++++++++++++++
> >  1 file changed, 34 insertions(+)
> >
> > diff --git a/arch/riscv/boot/dts/sifive/fu740-c000.dtsi b/arch/riscv/boot/dts/sifive/fu740-c000.dtsi
> > index d1bb22b11920..d0839739b425 100644
> > --- a/arch/riscv/boot/dts/sifive/fu740-c000.dtsi
> > +++ b/arch/riscv/boot/dts/sifive/fu740-c000.dtsi
> > @@ -158,6 +158,7 @@ prci: clock-controller@...00000 {
> >                       reg = <0x0 0x10000000 0x0 0x1000>;
> >                       clocks = <&hfclk>, <&rtcclk>;
> >                       #clock-cells = <1>;
> > +                     #reset-cells = <1>;
> >               };
> >               uart0: serial@...10000 {
> >                       compatible = "sifive,fu740-c000-uart", "sifive,uart0";
> > @@ -288,5 +289,38 @@ gpio: gpio@...60000 {
> >                       clocks = <&prci PRCI_CLK_PCLK>;
> >                       status = "disabled";
> >               };
> > +             pcie@...000000 {
> > +                     #address-cells = <3>;
> > +                     #interrupt-cells = <1>;
> > +                     #num-lanes = <8>;
> > +                     #size-cells = <2>;
> > +                     compatible = "sifive,fu740-pcie";
> > +                     reg = <0xe 0x00000000 0x1 0x0
> > +                            0xd 0xf0000000 0x0 0x10000000
> > +                            0x0 0x100d0000 0x0 0x1000>;
> > +                     reg-names = "dbi", "config", "mgmt";
> > +                     device_type = "pci";
> > +                     dma-coherent;
> > +                     bus-range = <0x0 0xff>;
> > +                     ranges = <0x81000000  0x0 0x60080000  0x0 0x60080000 0x0 0x10000        /* I/O */
> > +                               0x82000000  0x0 0x60090000  0x0 0x60090000 0x0 0xff70000      /* mem */
> > +                               0x82000000  0x0 0x70000000  0x0 0x70000000 0x0 0x1000000      /* mem */
> > +                               0xc3000000 0x20 0x00000000 0x20 0x00000000 0x20 0x00000000>;  /* mem prefetchable */
> > +                     num-lanes = <0x8>;
> > +                     interrupts = <56 57 58 59 60 61 62 63 64>;
> > +                     interrupt-names = "msi", "inta", "intb", "intc", "intd";
> > +                     interrupt-parent = <&plic0>;
> > +                     interrupt-map-mask = <0x0 0x0 0x0 0x7>;
> > +                     interrupt-map = <0x0 0x0 0x0 0x1 &plic0 57>,
> > +                                     <0x0 0x0 0x0 0x2 &plic0 58>,
> > +                                     <0x0 0x0 0x0 0x3 &plic0 59>,
> > +                                     <0x0 0x0 0x0 0x4 &plic0 60>;
> > +                     clock-names = "pcie_aux";
> > +                     clocks = <&prci PRCI_CLK_PCIE_AUX>;
> > +                     pwren-gpios = <&gpio 5 0>;
> > +                     perstn-gpios = <&gpio 8 0>;
> > +                     resets = <&prci 4>;
> > +                     status = "okay";
> > +             };
> >       };
> >  };
>
> Acked-by: Palmer Dabbelt <palmerdabbelt@...gle.com>
>
> I'm happy to take these all through the RISC-V tree if that helps, but
> as usual I'd like reviews or acks from the subsystem maintainers.  It
> looks like there are some issues so I'm going to drop this from my
> inbox.

Hi Palmer,

Since the subsystem maintainer has pick the first 5 patches to his
branch, would you please help to pick the 6th patch of version 6?
Thank you. :)

https://www.spinics.net/lists/linux-clk/msg57213.html
https://patchwork.kernel.org/project/linux-riscv/patch/20210406092634.50465-7-greentime.hu@sifive.com/