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<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">Thank you Aleksandr. I should have know to read the wiki first
</span></span><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt;font-family:"Segoe UI Emoji",sans-serif">😊</span></span><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">I now see that the port /dev/ttyAMA0 is not whitelisted.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">I found a post from an old mailing list on identifying the kernel driver and whitelisting it using this
<o:p></o:p></span></span></p>
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<pre><span style="color:black"><o:p> </o:p></span></pre>
<pre><span style="color:black">ACTION!="add|change|move", GOTO="mm_platform_device_whitelist_end"<o:p></o:p></span></pre>
<pre><span style="color:black">SUBSYSTEM!="platform", GOTO="mm_platform_device_whitelist_end"<o:p></o:p></span></pre>
<pre><span style="color:black">DRIVERS=="imx-uart", ENV{ID_MM_PLATFORM_DRIVER_PROBE}="1"<o:p></o:p></span></pre>
<pre><span style="color:black">LABEL="mm_platform_device_whitelist_end"<o:p></o:p></span></pre>
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<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">Before I found all this info I created 2 udev rules for /dev/ttyAMA0 and the /devices/platform/soc/20201000.serial. I named them randomly
<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">cat /etc/udev/rules.d/s7648-ttyama0.rules<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">ACTION=="add", KERNEL=="20201000.serial", ENV{ID_MM_PLATFORM_DRIVER_PROBE}="1"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">cat /etc/udev/rules.d/ttyama0.rules<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">ACTION=="add|change|move", KERNEL=="ttyAMA0", ENV{ID_MM_TTY_FLOW_CONTROL}="rts-cts", ENV{ID_MM_TTY_BAUDRATE}="115200"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">And lastly here is the output of udevadm<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">udevadm info --attribute-walk /dev/ttyAMA0<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">Udevadm info starts with the device specified by the devpath and then<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">walks up the chain of parent devices. It prints for every device<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">found, all possible attributes in the udev rules key format.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">A rule to match, can be composed by the attributes of the device<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">and the attributes from one single parent device.<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> looking at device '/devices/platform/soc/20201000.serial/tty/ttyAMA0':<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> KERNEL=="ttyAMA0"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> SUBSYSTEM=="tty"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> DRIVER==""<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> looking at parent device '/devices/platform/soc/20201000.serial':<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> KERNELS=="20201000.serial"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> SUBSYSTEMS=="amba"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> DRIVERS=="uart-pl011"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> ATTRS{driver_override}=="(null)"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> ATTRS{id}=="00241011"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> ATTRS{irq0}=="81"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> looking at parent device '/devices/platform/soc':<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> KERNELS=="soc"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> SUBSYSTEMS=="platform"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> DRIVERS==""<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> ATTRS{driver_override}=="(null)"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> looking at parent device '/devices/platform':<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> KERNELS=="platform"<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> SUBSYSTEMS==""<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"> DRIVERS==""<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">I think to get my port whitelisted I should just create:<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">platform-uart-pl0111.rules in /etc/udev/rules.d<o:p></o:p></span></span></p>
<pre><span style="color:black"><o:p> </o:p></span></pre>
<pre><span style="color:black">with <o:p></o:p></span></pre>
<pre><span style="color:black"><o:p> </o:p></span></pre>
<pre><span style="color:black">ACTION!="add|change|move", GOTO="mm_platform_device_whitelist_end"<o:p></o:p></span></pre>
<pre><span style="color:black">SUBSYSTEM!="platform", GOTO="mm_platform_device_whitelist_end"<o:p></o:p></span></pre>
<pre><span style="color:black">DRIVERS=="uart-pl011", ENV{ID_MM_PLATFORM_DRIVER_PROBE}="1"<o:p></o:p></span></pre>
<pre><span style="color:black">LABEL="mm_platform_device_whitelist_end"<o:p></o:p></span></pre>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">Is that correct?<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt">Thanks,<o:p></o:p></span></span></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal">Sent from <a href="https://go.microsoft.com/fwlink/?LinkId=550986">
Mail</a> for Windows 10</p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<div style="mso-element:para-border-div;border:none;border-top:solid #E1E1E1 1.0pt;padding:3.0pt 0in 0in 0in">
<p class="MsoNormal" style="border:none;padding:0in"><b>From: </b><a href="mailto:aleksander@aleksander.es">Aleksander Morgado</a><br>
<b>Sent: </b>Friday, April 3, 2020 11:10 AM<br>
<b>To: </b><a href="mailto:valens.dsilva@revivalanalytics.com">Valens D'Silva</a><br>
<b>Cc: </b><a href="mailto:modemmanager-devel@lists.freedesktop.org">modemmanager-devel@lists.freedesktop.org</a><br>
<b>Subject: </b>Re: ModemManager 1.6.4 on Raspbian Stretch cannot acquire the 'org.freedesktop.ModemManager1' service name</p>
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<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
<p class="MsoNormal">Hey,<br>
<br>
><br>
><br>
><br>
> I am trying to get a UART connected modem working with Modem Manager.<br>
><br>
><br>
><br>
> When I run ModemManager in Debug I get this error<br>
><br>
><br>
><br>
> Could not acquire the 'org.freedesktop.ModemManager1' service name<br>
><br>
><br>
<br>
<br>
You need to stop the system-managed ModemManager before you run your<br>
own instance in debug mode; try:<br>
<br>
$ sudo systemctl stop ModemManager<br>
$ sudo /usr/sbin/ModemManager --debug<br>
<br>
See <a href="https://www.freedesktop.org/wiki/Software/ModemManager/Debugging/">https://www.freedesktop.org/wiki/Software/ModemManager/Debugging/</a><br>
<br>
-- <br>
Aleksander<br>
<a href="https://aleksander.es">https://aleksander.es</a><o:p></o:p></p>
<p class="MsoNormal"><span class="DefaultFontHxMailStyle"><span style="font-size:12.0pt"><o:p> </o:p></span></span></p>
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