1. 17 7月, 2007 1 次提交
    • Y
      serial: assert DTR for serial console devices · 79492689
      Yinghai Lu 提交于
      Some RS-232 devices require DTR to be asserted before they can be used.  DTR
      is normally asserted in uart_startup() when the port is opened.  But we don't
      actually open serial console ports, so assert DTR when the port is added.
      
      BTW:
      earlyprintk and early_uart are hard coded to set DTR/RTS.
      
      rmk says
      
        The only issue I can think of is the possibility for an attached modem to
        auto-answer or maybe even auto-dial before the system is ready for it to do
        so.  Might have an undesirable cost implication for some running with such a
        setup.
      
        Apart from that, I can't think of any other side effect of this specific
        patch.
      Signed-off-by: NYinghai Lu <yinghai.lu@sun.com>
      Acked-by: NRussell King <rmk@arm.linux.org.uk>
      Cc: Andi Kleen <ak@suse.de>
      Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
      Cc: Gerd Hoffmann <kraxel@suse.de>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      79492689
  2. 16 7月, 2007 12 次提交
  3. 15 7月, 2007 27 次提交