On 30/08/2016 01:37, Fabio Estevam wrote: > From: Fabio Estevam <fabio.este...@nxp.com> > > When running a NXP 4.1 kernel with U-Boot mainline on a mx6ul-evk, > we observe a hang when going into the lowest operational point of cpufreq. > > This hang issue does not happen on the NXP U-Boot version. > > After comparing the SPL DDR initialization against the DCD table > from NXP U-Boot, the key difference that causes the hang is the > MDREF register setting: > > DATA 4 0x021B0020 0x00000800 > > ,which means: > > REF_SEL = 0 --> Periodic refresh cycle: 64kHz > REFR = 1 ---> Refresh Rate - 2 refreshes > > So adjust the MDREF initialization for mx6ul_evk accordingly > to fix the kernel hang issue at low bus frequency. > > Reported-by: Eric Nelson <e...@nelint.com> > Signed-off-by: Fabio Estevam <fabio.este...@nxp.com> > ---
Applied (all series as fix !) to u-boot-imx, thanks ! Best regards, Stefano Babic -- ===================================================================== DENX Software Engineering GmbH, Managing Director: Wolfgang Denk HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany Phone: +49-8142-66989-53 Fax: +49-8142-66989-80 Email: sba...@denx.de ===================================================================== _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
