[PATCH v1 0/3] max3100: improvements
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From: christian pellegrin on 23 Mar 2010 06:30 Hi all, I think all the comments sent to me were dealt with so I'm resending the patches. I haven't received any feedback about the addition to the threaded interrupt code, but that part hasn't changed. This bunch of patches should solve the problems noted by Feng to the max3100 driver. It was tested on an S3C2440 system which has a rather bad SPI master controller. The efficiency is very good on zmodem receive (near 100% at 115200) and not so bad on zmodem send (around 95% at 115200). I guess the reason is the TX buffer of the MAX3100 being just one byte deep. All the tests were done with two MAX3100 running on the same SPI bus: the first one as a console and under test, the second one happily receiving a 4800 bit/s NMEA stream from a GPS (with a process checking we don't get wrong sentences). I also did the simple "cut&paste a screenful of charters" test and it worked! The console was stressed as much I could (things like putting the S3C to suspend during a zmodem transfer and checking it restarts after resume). -- Christian Pellegrin, see http://www.evolware.org/chri/ "Real Programmers don't play tennis, or any other sport which requires you to change clothes. Mountain climbing is OK, and Real Programmers wear their climbing boots to work in case a mountain should suddenly spring up in the middle of the computer room." -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |