4 Nov
2019
4 Nov
'19
9:55 a.m.
According to IMX28CEC rev. 4, 10/2018, Table 15. Recommended Operating Conditions, page 16, the VDDD should be set to 1.55V when the CPU is operating at 454MHz. This is the case in U-Boot, hence increase the VDDD voltage. This fixes instability when performing TFTP transfers. Increase the brownout threshold to 1.4V. The documentation recommends 1.45V setting for the brownout, however, this triggers failure during power block init, so keep the brownout slightly lower. Signed-off-by: Marek Vasut marex@denx.de Cc: Stefano Babic sbabic@denx.de Reviewed-by: Fabio Estevam festevam@gmail.com
Applied to u-boot-imx, master, 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: sbabic@denx.de
=====================================================================