Messages in this thread | | | Date | Fri, 04 Dec 2015 16:46:28 -0800 | From | Michael Turquette <> | Subject | Re: [PATCH RFC RFT 0/3] clk: detect per-user enable imbalances and implement hand-off |
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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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