tree 2fa21834b34f5ceb90b097dd6f63ab937da15625
parent 1079b3a2cea0704288baea4babecf7e39a6ba9c7
author Fabio Estevam <fabio.estevam@nxp.com> 1473691116 -0300
committer Stefano Babic <sbabic@denx.de> 1475575274 +0200

wandboard: Fix hang when going into low frequency

A kernel hang is observed when running wandboard 3.14 kernel and
going to the lowest operational point of cpufreq:

# ifconfig eth0 down
# echo 1 > /sys/class/graphics/fb0/blank

The problem is caused by incorrect setting of the REFR field
of register MDREF. Setting it to 4 refresh commands per refresh
cycle fixes the hang.

Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>