Re: [PATCH v7 4/4] riscv: dts: add clock generator for Sophgo SG2042 SoC

From: Chen Wang <unicorn_wang@outlook.com>
To: Conor Dooley <conor@kernel.org>, Chen Wang <unicornxw@gmail.com>
Cc: aou@eecs.berkeley.edu, chao.wei@sophgo.com,
	krzysztof.kozlowski+dt@linaro.org, mturquette@baylibre.com,
	palmer@dabbelt.com, paul.walmsley@sifive.com,
	richardcochran@gmail.com, robh+dt@kernel.org, sboyd@kernel.org,
	devicetree@vger.kernel.org, linux-clk@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
	haijiao.liu@sophgo.com, xiaoguang.xing@sophgo.com,
	guoren@kernel.org, jszhang@kernel.org, inochiama@outlook.com,
	samuel.holland@sifive.com
Subject: Re: [PATCH v7 4/4] riscv: dts: add clock generator for Sophgo SG2042 SoC
Date: Thu, 11 Jan 2024 15:55:52 +0800	[thread overview]
Message-ID: <MA0P287MB28223C2A4D405527AA806008FE682@MA0P287MB2822.INDP287.PROD.OUTLOOK.COM> (raw)
In-Reply-To: <20240110-sedative-reggae-389839cef8c4@spud>

On 2024/1/10 22:13, Conor Dooley wrote:
> On Mon, Jan 08, 2024 at 02:49:53PM +0800, Chen Wang wrote:
>
>> +	cgi: oscillator {
>> +		compatible = "fixed-clock";
>> +		clock-output-names = "cgi";
>> +		#clock-cells = <0>;
>> +	};
> Where does the name "cgi" come from and what does it mean?
> Clock Generator Input? Does the sg2042 documentation call it that?

It's abbrevation of "Clock Gen IC", I found this in the clock tree 
diagram. 
https://github.com/sophgo/sophgo-doc/blob/main/SG2042/TRM/source/pic/clock-tree.png

BTW, There are three cgi on the diagram. Should I define 3 in DTS too? I 
just found they are the same so I just defined one.

>
> Cheers,
> Conor.

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