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[73.228.159.35]) by smtp.gmail.com with ESMTPSA id ca18e2360f4ac-85e2bc13d74sm125798039f.11.2025.03.23.06.23.48 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Sun, 23 Mar 2025 06:23:49 -0700 (PDT) Message-ID: Date: Sun, 23 Mar 2025 08:23:48 -0500 Precedence: bulk X-Mailing-List: linux-clk@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH RESEND 7/7] riscv: dts: spacemit: add reset support for the K1 SoC To: Yixun Lan Cc: p.zabel@pengutronix.de, mturquette@baylibre.com, sboyd@kernel.org, robh@kernel.org, krzk+dt@kernel.org, conor+dt@kernel.org, heylenay@4d2.org, guodong@riscstar.com, paul.walmsley@sifive.com, palmer@dabbelt.com, aou@eecs.berkeley.edu, spacemit@lists.linux.dev, devicetree@vger.kernel.org, linux-clk@vger.kernel.org, linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org References: <20250321151831.623575-1-elder@riscstar.com> <20250321151831.623575-8-elder@riscstar.com> <20250322164830-GYE11633@gentoo> Content-Language: en-US From: Alex Elder In-Reply-To: <20250322164830-GYE11633@gentoo> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 3/22/25 11:48 AM, Yixun Lan wrote: > 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 >> --- >> 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@c0880000 { > 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 They call it "AUD_MCUSYSCTRL section ", where the registers layouts are defined, and the register names use the "RCPU" prefix by convention. I guess I could use "AUDIO" instead, but I think it's "RCPU" is a little better because of the way things in the region are named. It's a little like how "pll" is used for the DT node name for things in the "APBS" region. I don't really like that, because the connection between the two isn't very clear. >> + compatible = "spacemit,k1-syscon-rcpu"; >> + reg = <0x0 0xc0880000 0x0 0x2048>; >> + #reset-cells = <1>; >> + }; >> + >> + syscon_rcpu2: system-controller@c0888000 { > not found this address mapping in above docs link You're right. I was following what the downstream code did. I'll gladly just include this in the main "RCPU" node. Thank you very much for the review Yixun. -Alex >> + compatible = "spacemit,k1-syscon-rcpu2"; >> + reg = <0x0 0xc0888000 0x0 0x28>; >> + #reset-cells = <1>; >> + }; >> + >> syscon_apbc: system-control@d4015000 { >> compatible = "spacemit,k1-syscon-apbc"; >> reg = <0x0 0xd4015000 0x0 0x1000>; >> @@ -518,6 +530,12 @@ clint: timer@e4000000 { >> <&cpu7_intc 3>, <&cpu7_intc 7>; >> }; >> >> + syscon_apbc2: system-controller@f0610000 { >> + compatible = "spacemit,k1-syscon-apbc2"; >> + reg = <0x0 0xf0610000 0x0 0x20>; >> + #reset-cells = <1>; >> + }; >> + >> sec_uart1: serial@f0612000 { >> compatible = "spacemit,k1-uart", "intel,xscale-uart"; >> reg = <0x0 0xf0612000 0x0 0x100>; >> -- >> 2.43.0 >> >