From: Stefan Strobl <nst@gersys•de>
To: ppc-dev <linuxppc-dev@ozlabs•org>
Subject: ADS5121 how to use /dev/ttyPSC
Date: Wed, 14 Jan 2009 17:47:41 +0100 [thread overview]
Message-ID: <496E172D.9060304@gersys.de> (raw)
Hi
I'm new to Kernel 2.6 and OF.
I'm using a ADS5121 board with kernel from denx (ads5121 branch from
linux-2.6-denx). According to my dts file both PSC3 and PSC4 should be
accessible through /dev/ttyPSC0 and /dev/ttyPSC1 respectively.
When I simply try to run: "$ echo "Hello" > /dev/ttyPSC*" I can't see
any data coming out from the ports.
And when trying to initialize the ports using termios commands I'm
getting the Error "Inappropriate ioctl for device".
I'm not even getting a negative voltage on the TX Pin (idle state).
But I can see the driver ttyPSC with major 204 in /proc/devices and I
can also open the device successfully. I am also able to configure
either port as CONSOLE in U-Boot so the Hardware is ok.
Any ideas?
Many thanks,
Stefan
next reply other threads:[~2009-01-14 16:52 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-14 16:47 Stefan Strobl [this message]
2009-01-15 1:30 ` ADS5121 how to use /dev/ttyPSC Matt Sealey
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