On Sun, Jan 05, 2014 at 06:37:21PM +0100, Sebastian Hesselbarth wrote:

If you mean clock-gated with "powered down", the code is safe. It
enables the clock gate prior reading from the controller. Or is there
another way to power down the controller, so you cannot read from the
controller registers?

There is a clock gate and a power down on kirkwood at least, Linux has
no code for controlling the powerdown

In any event, I think processing a disabled DT node is not great..

Jason