Re: mx51 efikamx

-- Matt Sealey matt@genesi-usa.com Product Development Analyst, Genesi USA, Inc. On Sat, Feb 5, 2011 at 3:10 PM, Per Forlin per.forlin@linaro.org wrote: > On 5 February 2011 01:24, Matt Sealey matt@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 matt@genesi-usa.com >> Product Development Analyst, Genesi USA, Inc. >> >> >> >> On Fri, Feb 4, 2011 at 4:58 PM, Per Forlin per.forlin@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 >>> >> >