On Thu, Feb 7, 2013 at 2:45 PM, Fabio Estevam <[email protected]> wrote: > On a mx6qsabresd revision C board with rev1.2 mx6q, the system gets resetted > and it is not able to reach the Linux prompt. > > Comparing the watchdog behaviour on a revB versus revC board: > > - On a mx6qsabresd revB: > > U-Boot > reset > resetting ... > > U-Boot 2013.01-10524-g432a3aa-dirty (Feb 07 2013 - 13:34:46) > > CPU: Freescale i.MX6Q rev1.1 at 792 MHz > Reset cause: WDOG > ... > > - On a mx6qsabresd revC: > > U-Boot > reset > resetting ... > > U-Boot 2013.01-10524-g432a3aa-dirty (Feb 07 2013 - 13:34:46) > > CPU: Freescale i.MX6Q rev1.1 at 792 MHz > Reset cause: POR > > So due to revC POR/watchdog circuitry whenever a watchdog occurs, it causes a > POR. > > Clearing the PDE - Power Down Enable bit of WMCR registers fixes the problem > and > is also safe for all mx6 boards. > > Signed-off-by: Fabio Estevam <[email protected]>
Acked-by: Otavio Salvador <[email protected]> -- Otavio Salvador O.S. Systems E-mail: [email protected] http://www.ossystems.com.br Mobile: +55 53 9981-7854 http://projetos.ossystems.com.br _______________________________________________ U-Boot mailing list [email protected] http://lists.denx.de/mailman/listinfo/u-boot
