On 5 February 2011 01:24, Matt Sealey <m...@genesi-usa.com> wrote: > To be frank, *absolutely do not touch U-Boot*. Linaro does not offer > support for either the Smartbook in U-Boot (it's not even been pushed > to mainline yet) and I am fairly certain that the Smartbook in the > kernel is not supported enough to get a reasonably working system. > There's a very good chance you will brick something and not be able to > recover it. Thanks for your advice. I wont touch the u-boot unless I have to.
> > You say you have USB-serial, does that mean you have the little flat > serial cable from under the keyboard and dongle attached? I don't > understand what you mean by having a small ramfs with USB-serial > support (debug support is not via USB, it's a special debug board. I > know this is not terribly friendly, but it is how it is). I don't have the serial/JTAG connector that connects under the keyboard. I only have a normal usb-serial dongle. What I would like to accomplish is to run some benchmark on the mmc controller. I have some patches to improve mmc-performance that I would like to run on the efika-mx. So far I have only test results for U8500 and U5500 (ST-Ericsson boards). If I could get a debug connector that make my life easier :) But not having that I thought usb-serial will do, if I can get it to work. Using an usb-serial dongle I can login to the efika-mx over uart, ttyUSB0 in my case. If the system hangs before the ttyUSB0 is set up I wont be able to login and I wont see anything. Therefore I am making a small ramfs to boot up a reliable system that only support enough to bring up the ttyUSB0. From that point I can add modules for the rest of my system in a controlled manner. > > Serial settings are 115200,8n1 if not set explicitly I would start > there (sometimes when rebooting systems will put some odd characters > from the FIFO and it messes up speed detection). You probably need to > make sure serial support is compiled into the kernel - check the > config. It may not be! The Linaro kernel MAY have enough from the > linux-imx branch to support the Smartbook but it may also not be > configured correctly. > > Please tell us your kernel boot arguments, give me a pointer to a git > repository or commit of a Linaro branch I can look at to confirm what > you're running. I first tried the kernel at git git://gitorious.org/efikamx/linux-kernel.git. I works but the patches I want to test for mmc is based on 2.6.38. So I tried running mainline kernel. There is a Kconfig option for "efika mx netbook" I thought it might work. The mx51_defconfig enables both MMC and USB so it looks promising. I also tried Sascha's tree for mx51 and Linaro's tree. I don't need a full system only support for MMC and USB for now. It could be that I run into a trivial boot failure but I can't see it since I don't have a real uart. If anyone have a working mainline kernel for efika-mx with usb-serial support I would like to see the defconfig. Thanks, Per > > -- > Matt Sealey <m...@genesi-usa.com> > Product Development Analyst, Genesi USA, Inc. > > > > On Fri, Feb 4, 2011 at 4:58 PM, Per Forlin <per.for...@linaro.org> wrote: >> Hi, >> >> I am trying to boot my efikamx netbook with the Linaro 37 kernel. I >> only have a usb-serial interface so I can't really see where I get >> stuck. >> I manage to boot a small ramfs with usb-serial suppport on the Genesi >> kernel 2.6.31.14.12, but I haven't succeeded to get any usb-serial >> output on the Linaro 37 kernel. >> I still use the u-boot provided by Genesi. I will switch to the Linaro >> u-boot tomorrow to see if that helps. >> >> Is anyone running a mainline kernel on efika-mx together with an >> usb-serial-connection? >> >> Thanks, >> Per >> >> _______________________________________________ >> linaro-dev mailing list >> linaro-dev@lists.linaro.org >> http://lists.linaro.org/mailman/listinfo/linaro-dev >> > _______________________________________________ linaro-dev mailing list linaro-dev@lists.linaro.org http://lists.linaro.org/mailman/listinfo/linaro-dev
