linux-kernel - Re: [PATCH RESEND 7/7] riscv: dts: spacemit: add reset support for the K1 SoC

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Message-ID: <20250322164830-GYE11633@gentoo>
Date: Sat, 22 Mar 2025 16:48:30 +0000
From: Yixun Lan <dlan@...too.org>
To: Alex Elder <elder@...cstar.com>
Cc: p.zabel@...gutronix.de, mturquette@...libre.com, sboyd@...nel.org,
	robh@...nel.org, krzk+dt@...nel.org, conor+dt@...nel.org,
	heylenay@....org, guodong@...cstar.com, paul.walmsley@...ive.com,
	palmer@...belt.com, aou@...s.berkeley.edu, spacemit@...ts.linux.dev,
	devicetree@...r.kernel.org, linux-clk@...r.kernel.org,
	linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH RESEND 7/7] riscv: dts: spacemit: add reset support for
 the K1 SoC

On 10:18 Fri 21 Mar     , Alex Elder wrote:
> Define syscon nodes for the RCPU, RCPU2, and APBC2 SpacemiT CCUS, which
> currently support resets but not clocks in the SpacemiT K1.
> 
> Signed-off-by: Alex Elder <elder@...cstar.com>
> ---
>  arch/riscv/boot/dts/spacemit/k1.dtsi | 18 ++++++++++++++++++
>  1 file changed, 18 insertions(+)
> 
> diff --git a/arch/riscv/boot/dts/spacemit/k1.dtsi b/arch/riscv/boot/dts/spacemit/k1.dtsi
> index 09a9100986b19..f86d1b58c6d35 100644
> --- a/arch/riscv/boot/dts/spacemit/k1.dtsi
> +++ b/arch/riscv/boot/dts/spacemit/k1.dtsi
> @@ -350,6 +350,18 @@ soc {
>  		dma-noncoherent;
>  		ranges;
>  
> +		syscon_rcpu: system-controller@...80000 {
I'm not sure if syscon_rcpu is good name to go, it's AUDIO Peripherals
in docs, see

7.2 Main CPU Domain Address Mapping
https://developer.spacemit.com/documentation?token=LzJyw97BCipK1dkUygrcbT0NnMg
> +			compatible = "spacemit,k1-syscon-rcpu";
> +			reg = <0x0 0xc0880000 0x0 0x2048>;
> +			#reset-cells = <1>;
> +		};
> +
> +		syscon_rcpu2: system-controller@...88000 {
not found this address mapping in above docs link
> +			compatible = "spacemit,k1-syscon-rcpu2";
> +			reg = <0x0 0xc0888000 0x0 0x28>;
> +			#reset-cells = <1>;
> +		};
> +
>  		syscon_apbc: system-control@...15000 {
>  			compatible = "spacemit,k1-syscon-apbc";
>  			reg = <0x0 0xd4015000 0x0 0x1000>;
> @@ -518,6 +530,12 @@ clint: timer@...00000 {
>  					      <&cpu7_intc 3>, <&cpu7_intc 7>;
>  		};
>  
> +		syscon_apbc2: system-controller@...10000 {
> +			compatible = "spacemit,k1-syscon-apbc2";
> +			reg = <0x0 0xf0610000 0x0 0x20>;
> +			#reset-cells = <1>;
> +		};
> +
>  		sec_uart1: serial@...12000 {
>  			compatible = "spacemit,k1-uart", "intel,xscale-uart";
>  			reg = <0x0 0xf0612000 0x0 0x100>;
> -- 
> 2.43.0
> 

-- 
Yixun Lan (dlan)
Gentoo Linux Developer
GPG Key ID AABEFD55