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

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Message-ID:
 <MA0P287MB28223C2A4D405527AA806008FE682@MA0P287MB2822.INDP287.PROD.OUTLOOK.COM>
Date: Thu, 11 Jan 2024 15:55:52 +0800
From: Chen Wang <unicorn_wang@...look.com>
To: Conor Dooley <conor@...nel.org>, Chen Wang <unicornxw@...il.com>
Cc: aou@...s.berkeley.edu, chao.wei@...hgo.com,
 krzysztof.kozlowski+dt@...aro.org, mturquette@...libre.com,
 palmer@...belt.com, paul.walmsley@...ive.com, richardcochran@...il.com,
 robh+dt@...nel.org, sboyd@...nel.org, devicetree@...r.kernel.org,
 linux-clk@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-riscv@...ts.infradead.org, haijiao.liu@...hgo.com,
 xiaoguang.xing@...hgo.com, guoren@...nel.org, jszhang@...nel.org,
 inochiama@...look.com, samuel.holland@...ive.com
Subject: Re: [PATCH v7 4/4] riscv: dts: add clock generator for Sophgo SG2042
 SoC


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.