From: Holger Schurig <holgerschurig@gmail.com>
To: Tom Evans <tom_usenet@optusnet.com.au>
Cc: Guillaume Picquet <guillaume@picquet.fr>,
Oliver Hartkopp <socketcan@hartkopp.net>,
Marc Kleine-Budde <mkl@pengutronix.de>,
linux-can@vger.kernel.org
Subject: Re: Setting bitrate from user-space application
Date: Wed, 23 Dec 2015 13:07:50 +0100 [thread overview]
Message-ID: <87mvt1e5bd.wl-holgerschurig@gmail.com> (raw)
In-Reply-To: <5659113C.20000@optusnet.com.au>
> Or if using Freescale's 2.6.35 driver, "ifconfig can0 down/up" and
> "echo 500000 > /sys/class/devices/platform/FlexCAN.0/bitrate" in the
> above "system()" call.
>
> I realise the above may be horrible, but I'd like some more
> information on why it might be bad.
a) it will only work with this specific FlexCAN driver from this proprietary kernel
b) if you ever are forced to upgrade to, say, 4.4, it won't work
Whereas "ip link set can0 type can bitrate 500000" will work with any card (even USB dongles that you might use as test equipment), and with any kernel.
As an added bonus, it can even set things like "restart-ms" :-)
next prev parent reply other threads:[~2015-12-23 12:07 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-11-25 14:02 Setting bitrate from user-space application Guillaume Picquet
2015-11-25 14:24 ` Misra Pankaj Kumar (RBEI/EEA2)
2015-11-25 14:58 ` Marc Kleine-Budde
2015-11-25 16:04 ` Oliver Hartkopp
2015-11-25 16:10 ` Marc Kleine-Budde
2015-11-25 16:17 ` Guillaume Picquet
2015-11-28 2:28 ` Tom Evans
2015-12-23 12:07 ` Holger Schurig [this message]
2015-12-23 14:03 ` Guillaume Picquet
2015-12-23 14:10 ` Marc Kleine-Budde
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