linux-kernel - Re: [PATCH 0/7] PM / devfreq: Add NoCP devfreq-event and support busfreq on exyno5422-odroidxu3

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Date:	Fri, 8 Apr 2016 14:55:35 +0200
From:	Markus Reichl <m.reichl@...etechno.de>
To:	Chanwoo Choi <cw00.choi@...sung.com>, myungjoo.ham@...sung.com,
	kyungmin.park@...sung.com, k.kozlowski@...sung.com,
	kgene@...nel.org, s.nawrocki@...sung.com, tomasz.figa@...il.com
Cc:	rjw@...ysocki.net, robh+dt@...nel.org, pawel.moll@....com,
	mark.rutland@....com, ijc+devicetree@...lion.org.uk,
	galak@...eaurora.org, linux@....linux.org.uk,
	linux.amoon@...il.com, tjakobi@...h.uni-bielefeld.de,
	inki.dae@...sung.com, linux-kernel@...r.kernel.org,
	linux-pm@...r.kernel.org, linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org
Subject: Re: [PATCH 0/7] PM / devfreq: Add NoCP devfreq-event and support
 busfreq on exyno5422-odroidxu3

Hi Chanwoo,

I tested both sets on odroid XU4 and U3.
Tested-by: Markus Reichl <m.reichl@...etechno.de>

Am 08.04.2016 um 07:00 schrieb Chanwoo Choi:
> This patchset support the AMBA bus frequency scaling on Exynos5422-based
> Odroid-XU3 board. But, this series only support the bus frequency scaling
> for INT (Internal) block using VDD_INT power line.
> 
> Also, to support the bus frequency scaling for Exynos542x SoC,
> Exynos542x SoC has the specific 'NoC (Network on Chip) Probe' device
> to measure the transfered data traffic on NoC (Network on Chip)
> instead of PPMU (Platform Performance Monitoring Unit). NoC Probe device
> provide the utilization for INT block of Exynos542x SoC.
> 
> The generic exynos-bus frequency driver uses the 'NoC Probe' devfreq-event
> device (drivers/devfreq/event/exynos-nocp.c) without any modification.
> Just add the phandle of 'NoC Probe' dt node to bus dt node.
> 
> Depend on:
> This patchset depends on patch[1] which support the generic exynos-bus
> frequency driver.
> 
> [1] https://lkml.org/lkml/2016/4/8/14
> - [PATCH v8 00/20] PM / devferq: Add generic exynos bus frequency driver and new passive governor
> 
> Chanwoo Choi (7):
>   PM / devfreq: event: Add new Exynos NoC probe driver
>   PM / devfreq: exynos: Add the detailed correlation for Exynos5422 bus
>   ARM: dts: Add NoC Probe dt node for Exynos542x SoC
>   dt-bindings: clock: Add the clock id for ACLK clock of Exynos542x SoC
>   clk: samsung: exynos542x: Add the clock id for ACLK
>   ARM: dts: Add bus nodes using VDD_INT for Exynos542x SoC
>   ARM: dts: Add support of Bus frequency using VDD_INT for exynos5422-odroidxu3
> 
>  .../bindings/devfreq/event/exynos-nocp.txt         |  86 +++++
>  .../devicetree/bindings/devfreq/exynos-bus.txt     |  19 +
>  arch/arm/boot/dts/exynos5420.dtsi                  | 407 +++++++++++++++++++++
>  arch/arm/boot/dts/exynos5422-odroidxu3-common.dtsi |  99 +++++
>  drivers/clk/samsung/clk-exynos5420.c               |  85 +++--
>  drivers/devfreq/event/Kconfig                      |   8 +
>  drivers/devfreq/event/Makefile                     |   2 +
>  drivers/devfreq/event/exynos-nocp.c                | 247 +++++++++++++
>  drivers/devfreq/event/exynos-nocp.h                |  78 ++++
>  include/dt-bindings/clock/exynos5420.h             |  24 +-
>  10 files changed, 1024 insertions(+), 31 deletions(-)
>  create mode 100644 Documentation/devicetree/bindings/devfreq/event/exynos-nocp.txt
>  create mode 100644 drivers/devfreq/event/exynos-nocp.c
>  create mode 100644 drivers/devfreq/event/exynos-nocp.h
> 

Thanks,
--
Markus Reichl