Hi Kever,

Am Mittwoch, 29. Oktober 2014, 18:06:07 schrieb Kever Yang:
> The rockchip clock driver use CLK_IGNORE_UNUSED flag to make sure
> all the clocks are available like default power on state.
> We have implement the clock manage in most of rockchip drivers,
> it is time to remove it for power save.
> Instead we add CLK_IGNORE_UNUSED for some clock nodes which should
> be on during boot or no module driver in kernel will initialize it.
> 
> Signed-off-by: Kever Yang <kever.yang@rock-chips.com>

I did test it on all three socs I have and two issues popped up.

the easy issue:
- aclk_strc_sys in common_clk_branches
- aclk_core in rk3188_clk_branches
need to also stay on in clk-rk3188.c


the hard issue:
With this patch applied and the above fixed, both the Radxa Rock (rk3188) and 
Hayou Marsboard (rk3066a) produce imprecise external aborts when entering 
userspace.

I guess there is still a clock in there that should stay on. I've attached 
logs that highlight the clocks that get disabled in the late_initcall. [error 
happens with and without these extra messages].


I'll investigate further, but if you have an idea which of the clocks might be 
responsible I would be very glad :-)


thanks
Heiko