linux-kernel - Re: [PATCH v5 4/7] riscv: dts: renesas: Add initial devicetree for Renesas RZ/Five SoC

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Date:   Sat, 29 Oct 2022 12:25:01 +0800
From:   Guo Ren <guoren@...nel.org>
To:     Prabhakar <prabhakar.csengg@...il.com>
Cc:     Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Magnus Damm <magnus.damm@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Conor Dooley <conor.dooley@...rochip.com>,
        Anup Patel <anup@...infault.org>,
        Atish Patra <atishp@...osinc.com>,
        Heinrich Schuchardt <heinrich.schuchardt@...onical.com>,
        devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org,
        Biju Das <biju.das.jz@...renesas.com>,
        Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH v5 4/7] riscv: dts: renesas: Add initial devicetree for
 Renesas RZ/Five SoC

On Sat, Oct 29, 2022 at 12:59 AM Prabhakar <prabhakar.csengg@...il.com> wrote:
>
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> Add initial device tree for Renesas RZ/Five RISC-V CPU Core (AX45MP
> Single).
>
> RZ/Five SoC is almost identical to RZ/G2UL Type-1 SoC (ARM64) hence we
> will be reusing r9a07g043.dtsi [0] as a base DTSI for both the SoC's.
> r9a07g043f.dtsi includes RZ/Five SoC specific blocks.
>
> Below are the RZ/Five SoC specific blocks added in the initial DTSI which
> can be used to boot via initramfs on RZ/Five SMARC EVK:
> - AX45MP CPU
> - PLIC
>
> [0] arch/arm64/boot/dts/renesas/r9a07g043.dtsi
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> ---
> v4 -> v5
> * Fixed riscv,ndev value (should be 511)
> * Reworked completely (sort of new patch)
>
> v3 -> v4
> * No change
>
> v2 -> v3
> * Fixed clock entry for CPU core
> * Fixed timebase frequency to 12MHz
> * Fixed sorting of the nodes
> * Included RB tags
>
> v1 -> v2
> * Dropped including makefile change
> * Updated ndev count
> ---
>  arch/riscv/boot/dts/renesas/r9a07g043f.dtsi | 57 +++++++++++++++++++++
>  1 file changed, 57 insertions(+)
>  create mode 100644 arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
>
> diff --git a/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi b/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
> new file mode 100644
> index 000000000000..50134be548f5
> --- /dev/null
> +++ b/arch/riscv/boot/dts/renesas/r9a07g043f.dtsi
> @@ -0,0 +1,57 @@
> +// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +/*
> + * Device Tree Source for the RZ/Five SoC
> + *
> + * Copyright (C) 2022 Renesas Electronics Corp.
> + */
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +
> +#define SOC_PERIPHERAL_IRQ(nr) (nr + 32)
> +
> +#include <arm64/renesas/r9a07g043.dtsi>
The initial patch shouldn't be broken. Combine them together with the
minimal components and add others late. Don't separate the DTS files.

> +
> +/ {
> +       cpus {
> +               #address-cells = <1>;
> +               #size-cells = <0>;
> +               timebase-frequency = <12000000>;
> +
> +               cpu0: cpu@0 {
> +                       compatible = "andestech,ax45mp", "riscv";
> +                       device_type = "cpu";
> +                       reg = <0x0>;
> +                       status = "okay";
> +                       riscv,isa = "rv64imafdc";
> +                       mmu-type = "riscv,sv39";
> +                       i-cache-size = <0x8000>;
> +                       i-cache-line-size = <0x40>;
> +                       d-cache-size = <0x8000>;
> +                       d-cache-line-size = <0x40>;
> +                       clocks = <&cpg CPG_CORE R9A07G043_CLK_I>;
> +
> +                       cpu0_intc: interrupt-controller {
> +                               #interrupt-cells = <1>;
> +                               compatible = "riscv,cpu-intc";
> +                               interrupt-controller;
> +                       };
> +               };
> +       };
> +};
> +
> +&soc {
> +       interrupt-parent = <&plic>;
> +
> +       plic: interrupt-controller@...00000 {
> +               compatible = "renesas,r9a07g043-plic", "andestech,nceplic100";
> +               #interrupt-cells = <2>;
> +               #address-cells = <0>;
> +               riscv,ndev = <511>;
> +               interrupt-controller;
> +               reg = <0x0 0x12c00000 0 0x400000>;
> +               clocks = <&cpg CPG_MOD R9A07G043_NCEPLIC_ACLK>;
> +               power-domains = <&cpg>;
> +               resets = <&cpg R9A07G043_NCEPLIC_ARESETN>;
Ditto, Where is cpg? in r9a07g043.dtsi?

> +               interrupts-extended = <&cpu0_intc 11 &cpu0_intc 9>;
> +       };
> +};
> --
> 2.25.1
>


-- 
Best Regards
 Guo Ren