I am using u-boot version 1.1.3, kernel, Linux(Debian) is version 2.6.12. I searched through the kernel configuration options via menuconfig, i could not find anything that configures the number of serial ports. In LINUX, i tried creating ttyS1 with "mknod -m 660 /dev/ttS1 c 4 65". A /dev/ttyS1 shows up in the directory listing, but I am unable to transmit/receive characters on it.
Thanks. Scott Wood-2 wrote: > > On Tue, Aug 25, 2009 at 08:37:11AM -0700, AGKohler wrote: >> >> Hello, >> >> I am working with a mpc8260ads(actually QUICC 8248 processor) based >> board. >> There are two hardware rs-232 ports available. >> I can switch the console between the two by switching the >> CONFIG_CONS_INDEX >> configuration variable between 1 and 4. >> I would like to have both ports in service, when Linux comes up. One as >> the >> console and the second to communicate with(i.e. acquire data from) a >> third >> party rs-232 device. Eventually, the third party device may be a >> telephone >> modem. Can anyone explain how to accomplish this, and if not, what >> constraints are blocking the accomplishment of my requirements. Any >> suggestions will be appreciated. > > This isn't a U-Boot issue, except insofar as U-Boot passes a device tree > to Linux (assuming it does even that -- you don't mention which kernel or > u-boot version you're using). > > If your device tree contains both serial ports, then Linux should be able > to use them both. If it doesn't work, make sure all the pins are > configured correctly, typically by Linux platform code for your board > (though ideally U-Boot should set them up as well). > > -Scott > _______________________________________________ > U-Boot mailing list > U-Boot@lists.denx.de > http://lists.denx.de/mailman/listinfo/u-boot > > -- View this message in context: http://www.nabble.com/How-can-I-make-a-second-serial-port-on-a-motorola-8248-Chip-known-to-Linux.-tp25136771p25157108.html Sent from the Uboot - Users mailing list archive at Nabble.com. _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
