Messages in this thread | | | Subject | Re: [PATCH] serial: DCC(JTAG) serial and console emulation support | From | Daniel Walker <> | Date | Thu, 07 Oct 2010 13:36:06 -0700 |
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On Thu, 2010-10-07 at 21:50 +0100, Alan Cox wrote: > > + Say Y here if you want to install DCC driver as a normal serial port > > + /dev/ttyS0 (major 4, minor 64). Otherwise, it appears as /dev/ttyJ0 > > + (major 4, minor 128) and can co-exist with other UARTs, such as > > + 8250/16C550 compatibles. > > + > > NAK to both
Both what?
> ttyJ0 is 204,186 for "JTAG1 DCC protocol based serial" > > so there is an existing name and minor allocation, which as you won't be > using two of them should be quite usable. > > If you want to be able to switch at runtime to pretend it is ttyS0 please > deal with that in your user space. The same rules apply to you as have > been applied to everyone else who has tried to implement this same crap > in their uart driver too (we'd have it in about 30 by now otherwise)
I would agree if this wasn't strictly for debugging embedded devices in difficult situations.. After talking to Mike, it's seems like it would be useful to have this as a ttyS* specifically because embedded devices won't always create a ttyJ* for you and ttyS* will likely already exist.
Daniel
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Sent by a consultant of the Qualcomm Innovation Center, Inc. The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum.
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