Re: [PATCH v2 6/9] riscv: dts: bouffalolab: add the bl808 SoC base device tree

From: Conor Dooley <conor@kernel.org>
To: Jisheng Zhang <jszhang@kernel.org>
Cc: "Rob Herring" <robh+dt@kernel.org>,
	"Krzysztof Kozlowski" <krzysztof.kozlowski+dt@linaro.org>,
	"Paul Walmsley" <paul.walmsley@sifive.com>,
	"Palmer Dabbelt" <palmer@dabbelt.com>,
	"Albert Ou" <aou@eecs.berkeley.edu>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	"Jiri Slaby" <jirislaby@kernel.org>,
	"Ilpo Järvinen" <ilpo.jarvinen@linux.intel.com>,
	linux-riscv@lists.infradead.org, devicetree@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-serial@vger.kernel.org,
	"Icenowy Zheng" <uwu@icenowy.me>
Subject: Re: [PATCH v2 6/9] riscv: dts: bouffalolab: add the bl808 SoC base device tree
Date: Sun, 27 Nov 2022 17:21:34 +0000	[thread overview]
Message-ID: <Y4OcngDlw/4Szt7g@spud> (raw)
In-Reply-To: <20221127132448.4034-7-jszhang@kernel.org>

+CC Icenowy

On Sun, Nov 27, 2022 at 09:24:45PM +0800, Jisheng Zhang wrote:
> Add a baisc dtsi for the bouffalolab bl808 SoC.
> 
> Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
> ---
>  arch/riscv/boot/dts/bouffalolab/bl808.dtsi | 74 ++++++++++++++++++++++
>  1 file changed, 74 insertions(+)
>  create mode 100644 arch/riscv/boot/dts/bouffalolab/bl808.dtsi
> 
> diff --git a/arch/riscv/boot/dts/bouffalolab/bl808.dtsi b/arch/riscv/boot/dts/bouffalolab/bl808.dtsi
> new file mode 100644
> index 000000000000..f4b170ccc32e
> --- /dev/null
> +++ b/arch/riscv/boot/dts/bouffalolab/bl808.dtsi
> @@ -0,0 +1,74 @@
> +// SPDX-License-Identifier: (GPL-2.0+ or MIT)
> +/*
> + * Copyright (C) 2022 Jisheng Zhang <jszhang@kernel.org>
> + */
> +
> +#include <dt-bindings/interrupt-controller/irq.h>
> +
> +/ {
> +	compatible = "bouffalolab,bl808";
> +	#address-cells = <1>;
> +	#size-cells = <1>;
> +
> +	cpus {
> +		timebase-frequency = <1000000>;
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		cpu0: cpu@0 {
> +			compatible = "thead,c906", "riscv";
> +			device_type = "cpu";
> +			reg = <0>;
> +			d-cache-block-size = <64>;
> +			d-cache-sets = <256>;
> +			d-cache-size = <32768>;
> +			i-cache-block-size = <64>;
> +			i-cache-sets = <128>;
> +			i-cache-size = <32768>;
> +			mmu-type = "riscv,sv39";
> +			riscv,isa = "rv64imafdc";
> +
> +			cpu0_intc: interrupt-controller {
> +				compatible = "riscv,cpu-intc";
> +				interrupt-controller;
> +				#address-cells = <0>;
> +				#interrupt-cells = <1>;
> +			};
> +		};
> +	};
> +
> +	xtal: xtal-clk {
> +		compatible = "fixed-clock";
> +		#clock-cells = <0>;
> +		/* This value must be overridden by the board */
> +		clock-frequency = <0>;
> +	};
> +
> +	soc {
> +		compatible = "simple-bus";
> +		ranges;
> +		interrupt-parent = <&plic>;
> +		dma-noncoherent;
> +		#address-cells = <1>;
> +		#size-cells = <1>;
> +
> +		uart0: serial@30002000 {
> +			compatible = "bouffalolab,bl808-uart";
> +			reg = <0x30002000 0x1000>;
> +			interrupts = <20 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&xtal>;
> +			status = "disabled";
> +		};
> +
> +		plic: interrupt-controller@e0000000 {
> +			compatible = "thead,c900-plic";

Hmm, @Icenowy - should this use your new open-c906-plic compatible from
20221121041757.418645-4-uwu@icenowy.me ?

As is, dtbs_check gives a:
bl808-sipeed-m1s-dock.dtb: interrupt-controller@e0000000: compatible: 'oneOf' conditional failed, one must be fixed:
        ['thead,c900-plic'] is too short

> +			reg = <0xe0000000 0x4000000>;
> +			interrupts-extended = <&cpu0_intc 0xffffffff>,
> +					      <&cpu0_intc 9>;
> +			interrupt-controller;
> +			#address-cells = <0>;
> +			#interrupt-cells = <2>;
> +			riscv,ndev = <64>;
> +		};
> +	};
> +};
> -- 
> 2.38.1
> 
> 
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv