linux-kernel - Re: [PATCH 1/3] platform/x86/pcengines-apuv2: add mpcie reset gpio export

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Date:   Tue, 16 Jul 2019 20:23:59 +0200
From:   "Enrico Weigelt, metux IT consult" <lkml@...ux.net>
To:     Florian Eckert <fe@....tdt.de>
Cc:     Eckert.Florian@...glemail.com, info@...ux.net,
        dvhart@...radead.org, andy@...radead.org,
        platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 1/3] platform/x86/pcengines-apuv2: add mpcie reset gpio
 export

On 15.07.19 16:38, Florian Eckert wrote:

> I plugged in a mpcie  usb modem.
> In my test case it was a EC25 from Quectel in mpcie2 port.
> After that I did a reboot and exported the gpio via "/sys/class/gpio"
> Then I executed the command "echo 0 > /sys/class/gpio/<name>/value" and
> "echo 1 > /sys/class/gpio/<name>/value".
> Then I have seen the log message in the kernel that the device did an
> unregistration/registration

hmm, did the same, tried both gpios (mpcie2_reset, mpcie3_reset), but
nothin happened.

But strange: I'm missing some hw, modem doesn't appear ... I'll have to
check again whether i've got unstable hw or missing some kernel config.


--mtx


-- 
Enrico Weigelt, metux IT consult
Free software and Linux embedded engineering
info@...ux.net -- +49-151-27565287