[PATCH v10 2/3] power-domain: rockchip: add power doamin driver

Kevin Hilman khilman at kernel.org
Tue Nov 11 08:53:13 PST 2014

Caesar Wang <caesar.wang at rock-chips.com> writes:

> In order to meet high performance and low power requirements, a power
> management unit is designed or saving power when RK3288 in low power mode.
> The RK3288 PMU is dedicated for managing the power ot the whole chip.
> Signed-off-by: Jack Dai <jack.dai at rock-chips.com>
> Signed-off-by: jinkun.hong <jinkun.hong at rock-chips.com>
> Signed-off-by: Caesar Wang <caesar.wang at rock-chips.com>
> ---
> Changes in v10:
>     - this switches over domain infos to use masks instead of recomputing
>       them each time and also gets rid of custom domain translator and
>       uses standard onecell on.
> Changes in v9:
>     - fix v8 changes as follows:
>     - This reconciles the v2 and v7 code so that we power domain have
>       lists of clocks they toggle on and off during power transitions and
>       independently from power domains clocks we attach clocks to devices
>       comprising power domain and prepare them so they are turn on and off
>       by runtime PM.

I still don't like having lists of clocks in the power-domain DT. 

DT is supposed to describe the hardware, and clocks are properties of
devices, not power-domains, so the DT description should follow from that.

I understand that some device may not be probed etc. when a power-domain
needs to transition, but the power-domain driver can still get the list
of clocks it needs from the device nodes within the domain, so it
shouldn't matter whether devices are probed or not.


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