linux-kernel - Re: [PATCH v6 0/8] Add support for Tegra Activity Monitor

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Date:	Wed, 18 Mar 2015 05:10:26 +0000 (GMT)
From:	MyungJoo Ham <myungjoo.ham@...sung.com>
To:	Tomeu Vizoso <tomeu.vizoso@...labora.com>,
	"linux-tegra@...r.kernel.org" <linux-tegra@...r.kernel.org>
Cc:	Mikko Perttunen <mikko.perttunen@...si.fi>,
	Alexandre Courbot <gnurou@...il.com>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	박경민 <kyungmin.park@...sung.com>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>,
	Mark Rutland <mark.rutland@....com>,
	Mike Turquette <mturquette@...aro.org>,
	Pawel Moll <pawel.moll@....com>,
	Peter De Schrijver <pdeschrijver@...dia.com>,
	Prashant Gaikwad <pgaikwad@...dia.com>,
	Rob Herring <robh+dt@...nel.org>,
	Russell King <linux@....linux.org.uk>,
	Stephen Boyd <sboyd@...eaurora.org>,
	Stephen Warren <swarren@...dotorg.org>,
	Thierry Reding <thierry.reding@...il.com>
Subject: Re: [PATCH v6 0/8] Add support for Tegra Activity Monitor

> Hello,
> 
> something happened during the last cycle and an old version of the devfreq
> driver was merged.
> 
> This thread contains patches that bring it up to date to the last submitted
> version and also incorporates the feedback that that version received, plus
> some other small fixes and improvements that came up during rebase and
> testing.
> 
> These patches implement support for setting the rate of the EMC clock based on
> stats collected from the ACTMON, a piece of hw in the Tegra124 that counts
> memory accesses (among others).
> 
> It depends on the following in-flight patches:
> 
> * EMC driver: http://thread.gmane.org/gmane.linux.kernel/1907035
> * CPUFreq driver: http://thread.gmane.org/gmane.linux.kernel/1897078
> 
> I have pushed a branch here for testing:
> 
> http://cgit.collabora.com/git/user/tomeu/linux.git/log/?h=actmon-v6
> 
> Regards,
> 
> Tomeu
> 
> Tomeu Vizoso (8):
>   of: Add binding for NVIDIA Tegra ACTMON node
>   PM / devfreq: tegra: Update to v5 of the submitted patches
>   clk: tegra: Have EMC clock implement determine_rate()
>   PM / devfreq: tegra: Use clock rate constraints
>   PM / devfreq: tegra: remove operating-points
>   PM / devfreq: tegra: Set drvdata before enabling the irq
>   PM / devfreq: tegra: Enable interrupts after resuming the devfreq
>     monitor
>   ARM: tegra: Add Tegra124 ACTMON support

Acked-by: MyungJoo Ham <myungjoo.ham@...sung.com>
for all PM / devfreq patches (2, 4, 5, 6, 7)
And merged in for-rc tree with a little modification.

In the patch 2/8, I would like to add "const" in Line 748.
Would it be fine with you?
(You may look at: https://git.kernel.org/cgit/linux/kernel/git/mzx/devfreq.git/log/?h=for-rc )


The diff after applying all 2/8 to 7/8 will be:

diff --git a/drivers/devfreq/tegra-devfreq.c b/drivers/devfreq/tegra-devfreq.c
index 0d1edd5..8e633a6 100644
--- a/drivers/devfreq/tegra-devfreq.c
+++ b/drivers/devfreq/tegra-devfreq.c
@@ -740,7 +740,7 @@ static int tegra_devfreq_remove(struct platform_device *pdev)
        return 0;
 }
 
-static struct of_device_id tegra_devfreq_of_match[] = {
+static const struct of_device_id tegra_devfreq_of_match[] = {
        { .compatible = "nvidia,tegra124-actmon" },
        { },
 };


> 
>  .../devicetree/bindings/arm/tegra/actmon.txt       |  28 ++
>  arch/arm/boot/dts/tegra124.dtsi                    |  11 +
>  drivers/clk/tegra/clk-emc.c                        |  19 +-
>  drivers/devfreq/tegra-devfreq.c                    | 480 +++++++++++----------
>  4 files changed, 316 insertions(+), 222 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/arm/tegra/actmon.txt
> 
> -- 
> 2.1.0
>