On Tuesday 03 June 2014 04:18 PM, Yegor Yefremov wrote: > On Tue, Jun 3, 2014 at 9:57 AM, Yegor Yefremov > <yegorslists@xxxxxxxxxxxxxx> wrote: >> Kernel: 3.14, 3.15 (I haven't tried another kernels) >> >> As soon as I write something to my NAND flash (via cat image > >> /dev/mtdblockx or ubiupdatevol) and make reboot or press a reset >> button, I see only CCCCC and nothing happens before I make a power >> cycle. Any idea? > > Just forgot to mention, that I was actually booting from MMC (mmc1). > The boot sequence is UART0...XIP...MMC0...NAND. > > If I just mount ubifs partition as rootfs and change some files, I > still can perform reboot and boot from MMC again. The issue seems to > occur only, if I write to /dev/mtdblock directly. What can affect ROM > boot so that it doesn't follow the boot sequence? Writing to sysboot bits in control_status register will make ROM change boot sequence. Not sure why NAND driver should be changing these values. Can you please verify that this register is indeed modified after the NAND write? Thanks, Sekhar -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
