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From: Heyi Guo <>
Cc: Zhikui Ren <>,
	Jae Hyun Yoo <>,
	Vernon Mauery <>,
	Ed Tanous <>, Josh Lehan <>,
	Ed Tanous <>,
	Patrick Venture <>
Subject: Re: Does it make sense to create a centralized fan control module?
Date: Wed, 16 Jun 2021 10:02:16 +0800	[thread overview]
Message-ID: <> (raw)
In-Reply-To: <>

Hi All,

Any comments for my questions at the top of this thread?



On 2021/6/11 上午9:23, Heyi Guo wrote:
> Please ignore my early emails; only this one is the final version. I 
> must have misused some shortcut key to send the unfinished versions 
> while I wanted to save it locally...
> Sorry for the noise.
> Heyi
> On 2021/6/11 上午9:14, Heyi Guo wrote:
>> Hi All,
>> Right now fan related data like tacho and PWM is fetched in 
>> dbus-sensors, and published to d-bus as sensor data, while fan 
>> control is made in another module like pid-control, which can fetch 
>> data and set value via d-bus.
>> In some common sense, we may think about putting all fan related work 
>> into one single module (which may be based on pid-control), i.e. it 
>> can read tacho and PWM from hardware directly, calculate the required 
>> PWM by some algorithm like PID, and then write to PWM hardware 
>> directly; the data will also be published to d-bus for other modules 
>> to consume, like fansensor from dbus-sensors.
>> Does it make sense to do that? Or is there any reason for the current 
>> design?
>> I'm new to OpenBMC and some of my understanding may be totally wrong.
>> Looking forward to your expert advice.
>> Thanks,
>> Heyi

  reply	other threads:[~2021-06-16  2:03 UTC|newest]

Thread overview: 7+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-06-11  1:14 Heyi Guo
2021-06-11  1:23 ` Heyi Guo
2021-06-16  2:02   ` Heyi Guo [this message]
2021-06-16  2:49     ` [Phishing Risk] [External] " John Wang
2021-06-16 11:03       ` Heyi Guo
2021-06-16 16:26 ` Ed Tanous
2021-06-20  8:48   ` Heyi Guo

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