linux-kernel - Re: [PATCH v2] riscv: dts: sophgo: add timer dt node for CV1800

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Date: Thu, 25 Jan 2024 17:12:54 +0000
From: Conor Dooley <conor@...nel.org>
To: AnnanLiu <annan.liu.xdu@...look.com>
Cc: chao.wei@...hgo.com, unicorn_wang@...look.com, robh+dt@...nel.org,
	krzysztof.kozlowski+dt@...aro.org, conor+dt@...nel.org,
	paul.walmsley@...ive.com, palmer@...belt.com, aou@...s.berkeley.edu,
	devicetree@...r.kernel.org, linux-riscv@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] riscv: dts: sophgo: add timer dt node for CV1800

On Thu, Jan 25, 2024 at 05:46:23PM +0800, AnnanLiu wrote:
> Add the timer device tree node to CV1800 SoC.
> 
> Signed-off-by: AnnanLiu <annan.liu.xdu@...look.com>
> ---
> This patch depends on the clk driver and reset driver.
> Clk driver link:
> https://lore.kernel.org/all/IA1PR20MB49539CDAD9A268CBF6CA184BBB9FA@IA1PR20MB4953.namprd20.prod.outlook.com/
> Reset driver link:
> https://lore.kernel.org/all/20231113005503.2423-1-jszhang@kernel.org/
> 
> Changes since v1:
> - Change the status of the timer from disabled to okay.
> v1 link:
> https://lore.kernel.org/all/DM6PR20MB23167E08FCA546D6C1899CB1AB9EA@DM6PR20MB2316.namprd20.prod.outlook.com/
> 
>  arch/riscv/boot/dts/sophgo/cv1800b.dtsi | 73 +++++++++++++++++++++++++
>  1 file changed, 73 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> index aec6401a467b..aef7970af2b8 100644
> --- a/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> +++ b/arch/riscv/boot/dts/sophgo/cv1800b.dtsi
> @@ -1,6 +1,7 @@
>  // SPDX-License-Identifier: (GPL-2.0 OR MIT)
>  /*
>   * Copyright (C) 2023 Jisheng Zhang <jszhang@...nel.org>
> + * Copyright (C) 2024 Annan Liu <annan.liu.xdu@...look.com>
>   */
>  
>  #include <dt-bindings/interrupt-controller/irq.h>
> @@ -113,6 +114,78 @@ plic: interrupt-controller@...00000 {
>  			riscv,ndev = <101>;
>  		};
>  
> +		timer0: timer@...a0000 {
> +			compatible = "snps,dw-apb-timer";
> +			reg = <0x030a0000 0x14>;
> +			interrupts = <79 IRQ_TYPE_LEVEL_HIGH>;
> +			clocks = <&osc>;
> +			resets = <&rst RST_TIMER0>;
> +			status = "okay";

Do these really have no interface clock? I'd expect something that
is almost certainly sitting on a apb (or similar) interface to have one.

Thanks,
Conor.

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