On Mon, May 26, 2014 at 2:48 AM, Maxime Ripard
[off-list ref] wrote:

On Fri, May 23, 2014 at 03:51:06PM +0800, Chen-Yu Tsai wrote:

quoted

PLL6 is used by some important but undocumented module, most likely
memory related, such as mbus or the actual memory controller. As we
do not have a driver for that, add pll6 to the list of protected
clocks, so that it won't be disabled and leave us with a non-responsive
system.

What issue have you seen?

Completely unresponsive after PLL6 is gated (on the A23).

The system actually works pretty great on the A31.

Does it work when there aren't any other PLL6 consumers?
Maybe the boot0 on A31 and A23 setup some DRAM-related modules differently.

If the A31 works without protecting PLL6, I'll add a separate list
for the A23.


Thanks,
ChenYu