linux-kernel - Re: [PATCH v7 07/10] drivers: qcom: rpmh: cache sleep/wake state requests

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Message-ID: <20180504213950.GD19594@google.com>
Date:   Fri, 4 May 2018 14:39:50 -0700
From:   Matthias Kaehlcke <mka@...omium.org>
To:     Lina Iyer <ilina@...eaurora.org>
Cc:     andy.gross@...aro.org, david.brown@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-soc@...r.kernel.org,
        rnayak@...eaurora.org, bjorn.andersson@...aro.org,
        linux-kernel@...r.kernel.org, sboyd@...nel.org,
        evgreen@...omium.org, dianders@...omium.org
Subject: Re: [PATCH v7 07/10] drivers: qcom: rpmh: cache sleep/wake state
 requests

On Wed, May 02, 2018 at 01:37:46PM -0600, Lina Iyer wrote:
> Active state requests are sent immediately to the RSC controller, while
> sleep and wake state requests are cached in this driver to avoid taxing
> the RSC controller repeatedly. The cached values will be sent to the
> controller when the rpmh_flush() is called.
> 
> Generally, flushing is a system PM activity and may be called from the
> system PM drivers when the system is entering suspend or deeper sleep
> modes during cpuidle.
> 
> Also allow invalidating the cached requests, so they may be re-populated
> again.
> 
> Signed-off-by: Lina Iyer <ilina@...eaurora.org>
> Reviewed-by: Evan Green <evgreen@...omium.org>

Reviewed-by: Matthias Kaehlcke <mka@...omium.org>