linux-kernel - 2.6.33.7, ftdi_sio, problem with digitemp

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Message-Id: <20100919125755.b0c3b9e5.hakan.lennestal@brfsodrahamn.se>
Date:	Sun, 19 Sep 2010 12:57:55 +0200
From:	Hakan Lennestal <hakan.lennestal@...sodrahamn.se>
To:	linux-kernel@...r.kernel.org
Subject: 2.6.33.7, ftdi_sio, problem with digitemp


Hi !

There was a ftdi_sio patch included in the 2.6.33.7 kernel (also 2.6.32.17 and 2.6.35):
"USB: ftdi_sio: support for Signalyzer tools based on FTDI chips"

This patch brakes the digitemp application, http://www.digitemp.com (it will hang).

The problem seem to be the addition of lowering and raising of the DTR/RTS signals in ftdi_sio.c:

  2324                /* raise DTR/RTS */
  2325                set_mctrl(port, TIOCM_DTR | TIOCM_RTS);

  ...

  2373                /* lower DTR/RTS */
  2374                clear_mctrl(port, TIOCM_DTR | TIOCM_RTS);

-- 
Hakan Lennestal <hakan.lennestal@...sodrahamn.se>
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