Hi Steve, On Wed, May 24, 2017 at 7:32 AM, Steve Twiss <stwiss.opensource@xxxxxxxxxxx> wrote: > The USB to UART connection gets corrupted. > If this patch is applied to the kernel, the i.MX6 Q (quad), and only this board as far as > we know, starts to fail. This does *not* change the i.MX6DL and other sabre boards > have been tested on kernelci.org and do not see a problem. > > An NXP/Freescale SABRESD i.MX6 Q board is requred. > > My system for testing is to TFTP the Linux kernel over an ethernet connection. The > U-boot executes okay and the UART is working at that point. When the kernel loads > the console trace becomes garbled, in the sense that I get the some characters being > output to the console, in the style of the kernel starting up, but they are not correct. > > I expect the kernel has started ok, but I am unable to read/write through the UART > console because of corruptions. > > Console log with the output I am seeing with linux-next/v4.12-rc2 > --- 8< --- > U-Boot 2009.08-00001-gf65536a (Jan 12 2015 - 15:47:19) Thanks for your detailed explanation. I also have a mx6q sabresd board here, but the error did not happen when I use a recent U-Boot version. I would like to use the same U-Boot version here as well to help debugging this problem. Could you please let me know which 2009.08 branch you used? Is it any one from git.freescale.com http://git.freescale.com/git/cgit.cgi/imx/uboot-imx.git/refs/heads ? Thanks, Fabio Estevam -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
