From: arno@natisbad•org (Arnaud Ebalard)
To: linux-arm-kernel@lists•infradead.org
Subject: [PATCHv1 2/3] arm: mvebu: add .dts file for Synology DS213j
Date: Tue, 18 Nov 2014 00:23:53 +0100 [thread overview]
Message-ID: <871tp1pg1i.fsf@natisbad.org> (raw)
In-Reply-To: <546A7997.1040603@killerwolves.net> (Ben Peddell's message of "Tue, 18 Nov 2014 08:41:27 +1000")
Hi Ben,
Ben Peddell <klightspeed@killerwolves•net> writes:
>>> The 5000RPM was interpolated from my measured RPM pulse rate (4200PPM)
>>> of the 80mm fan in my DS211j (which uses the 150-32-35 fan config) at
>>> maximum RPM.
>>
>> Then, I think I need to change the speed map to have 1900 RPM as max
>> speed. Out of curiosity, how did you measured the RPM pulse rate
>> exactly?
>
> I hooked a logic analyzer to the sense pin and measured the pulse rate.
>
> Looking at the specifications of the fan in this unit (an EC7025L12ER),
> it has a maximum fan speed of 3000RPM, so it looks like it uses two
> pulses per revolution and not one as I had assumed when I created the
> speed map.
Thanks for this feedback.
Cheers,
a+
next prev parent reply other threads:[~2014-11-17 23:23 UTC|newest]
Thread overview: 17+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-16 0:04 [PATCHv1 0/3] arm: mvebu: add Synology DS213j and DS414 .dts files Arnaud Ebalard
2014-11-16 0:04 ` [PATCHv1 1/3] arm: mvebu: add uartX labels for Armada SoC serial nodes Arnaud Ebalard
2014-11-16 1:09 ` Andrew Lunn
2014-11-16 12:34 ` Arnaud Ebalard
2014-11-16 0:04 ` [PATCHv1 2/3] arm: mvebu: add .dts file for Synology DS213j Arnaud Ebalard
2014-11-16 2:00 ` Andrew Lunn
2014-11-16 2:31 ` Andrew Lunn
2014-11-16 13:14 ` Arnaud Ebalard
2014-11-16 23:23 ` Ben Peddell
2014-11-17 8:25 ` Arnaud Ebalard
2014-11-17 22:41 ` Ben Peddell
2014-11-17 23:23 ` Arnaud Ebalard [this message]
2014-11-16 0:04 ` [PATCHv1 3/3] arm: mvebu: add .dts file for Synology DS414 Arnaud Ebalard
2014-11-16 2:15 ` Andrew Lunn
2014-11-16 13:17 ` Arnaud Ebalard
2014-11-16 2:20 ` [PATCHv1 0/3] arm: mvebu: add Synology DS213j and DS414 .dts files Andrew Lunn
2014-11-16 13:24 ` Arnaud Ebalard
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