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    SubjectRe: [PATCH RFC RFT 0/3] clk: detect per-user enable imbalances and implement hand-off
    Heiko Stübner wrote:
    > Hi Mike,
    >
    > Am Freitag, 7. August 2015, 12:09:27 schrieb Michael Turquette:
    > > This is an alternative solution to Lee's "clk: Provide support for
    > > always-on clocks" series[0].
    > >
    > > The first two patches introduce run-time checks to ensure that clock
    > > consumer drivers are respecting the clk.h api. The former patch checks
    > > for prepare and enable imbalances. The latter checks for calls to
    > > clk_put without first disabling and unpreparing the clk.
    > >
    > > The third patch introduces a new flag, CLK_ENABLE_HAND_OFF, which
    > > prepares and enables a clk at registration-time. The reference counts
    > > (prepare & enable) are transferred to the first clock consumer driver
    > > that clk_get's the clk with this flag set AND calls clk_prepare or
    > > clk_enable.
    > >
    > > The net result is that a clock with this flag set will be enabled at
    > > boot and neither the clk_disable_unused garbage collector or the
    > > "sibling clock disables a shared parent" scenario will cause the flagged
    > > clock to be disabled. The first driver to come along and explicitly
    > > claim, prepare and enable this clock will inherit those reference
    > > counts. No change to clock consumer drivers is required for this to
    > > work. Please continue to use the clk.h api properly.
    >
    > just out of curiosity, did this move anywhere yet? (Last message from october
    > 1st it seems)
    >
    > It looks like it is needed to fix the orphan-deferral I need on Rockchip that
    > breaks sunxi in its current state.

    Yes, I'm preparing another version. Sorry for high latency, but I've been
    traveling for more than 2 months non-stop.

    Regards,
    Mike

    >
    >
    > Thanks
    > Heiko




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