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Message-ID: <20081104192253.151d6ef3@lxorguk.ukuu.org.uk> Date: Tue, 4 Nov 2008 19:22:53 +0000 From: Alan Cox <alan@...rguk.ukuu.org.uk> To: "Chris Friesen" <cfriesen@...tel.com> Cc: linux-kernel@...r.kernel.org, linux-serial@...r.kernel.org Subject: Re: [BUG] serial base baud misdetected in 2.6.27 On Tue, 04 Nov 2008 12:24:45 -0600 "Chris Friesen" <cfriesen@...tel.com> wrote: > > I'm running an ATCA7101 board. This board has two 16550 ports that get > detected as ttyS4 and ttyS5. > > With a much earlier kernel (2.6.14) the serial port base speed is > correctly detected as 230400, which gives the desired 115200 when I > specify that on the kernel commandline. > > With 2.6.16 and 2.6.27 (not sure about the intervening kernels) the > serial port base speed is detected as 921600, which means that I need to > specify 460800 on the commandline to get a real speed of 115200 (as > verified by an external terminal server). > > Any ideas what could be causing this misdetection? I'm having lab > issues right now so I can't track it down, but I'll have a go at it > eventually. If this is a PCI card it may be matching against a PCI entry for a similar card with different crystals and need the right svid/sdid adding. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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