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    SubjectRe: [PATCH 03/22] clk: sunxi: add "pll6" to sun6i protected clock list
    On Mon, May 26, 2014 at 2:48 AM, Maxime Ripard
    <maxime.ripard@free-electrons.com> wrote:
    > On Fri, May 23, 2014 at 03:51:06PM +0800, Chen-Yu Tsai wrote:
    >> 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


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