Re: [PATCH v2 00/10] QCOM 8074 cpuidle driver

[Stephen Boyd <sboyd@codeaurora.org>]

On 08/12/14 12:43, Lina Iyer wrote:
> This is version #2 of the patches for cpuidle driver and its dependencies.
>
> Changes from version #1/RFC:
>
> - Remove hotplug from the patch series. Will submit it seprately.
> - Fix SPM drivers per the review comments
> - Modify patch sequence to compile SPM drivers independent of msm-pm, so as to
>   allow wfi() calls to use SPM even without SoC interface driver.
>
> 8074 like any ARM SoC can do architectural clock gating, that helps save on
> power, but not enough of leakage power.  Leakage power of the SoC can be
> further reduced by turning off power to the core. To aid this, every core (cpu
> and L2) is accompanied by a Sub-system Power Manager (SPM), that can be
> configured to indicate the low power mode, the core would be put into and the
> SPM programs the peripheral h/w accordingly to enter low power and turn off the
> power rail to the core.
>

General question before I go diving into the code, can this code use the
pending generic cpuidle state bindings[1]? Last I saw those bindings
looked pretty good.

[1] http://lwn.net/Articles/606080/

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