linux-kernel - Re: [PATCH v2 0/8] PM / devfreq: Add NoCP devfreq-event and support busfreq on exyno5422-odroidxu3

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Date:	Tue, 3 May 2016 12:29:22 +0200
From:	Krzysztof Kozlowski <k.kozlowski@...sung.com>
To:	Chanwoo Choi <cw00.choi@...sung.com>
Cc:	myungjoo.ham@...sung.com, kyungmin.park@...sung.com,
	k.kozlowski@...sung.com, tomasz.figa@...il.com,
	s.nawrocki@...sung.com, kgene@...nel.org, robh@...nel.org,
	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, m.reichl@...etechno.de,
	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 v2 0/8] PM / devfreq: Add NoCP devfreq-event and support
 busfreq on exyno5422-odroidxu3

On Fri, Apr 15, 2016 at 03:32:47PM +0900, Chanwoo Choi wrote:
> 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] http://www.spinics.net/lists/arm-kernel/msg495976.html
> - [PATCH v9 00/20] PM / devferq: Add generic exynos bus frequency driver and new passive governor
> 
> 
> Changse from v1:
> (https://lkml.org/lkml/2016/4/8/28)
> - Simplify the documentation of exynos-nocp.txt
> - Check the return value of regmap function
> - Modify Device Tree node name using general device name
>  : nocp_memX_X@ nocp_memX_X -> nocp_memX_X@ nocp
> - Fix wrong node name about nocp device tree node
> - Drop the CLK_SET_RATE_PARENT flag
> - Reorder bus device tree node alpabetically
> - Add the tested-by tag from Anand Moon and Markus Reichl
> - Add the reviewed-by tag to patch5/7 from Exynos SoC Maintainer
> - Add patch2 to modify the devfreq_event_get_edev_by_phandle()
>   to get the instance of devfreq-event device by using the phandle
> 
> Chanwoo Choi (8):
>   PM / devfreq: event: Add new Exynos NoC probe driver
>   PM / devfreq: event: Find the instance of devfreq-event device by using phandle
>   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


Applied DTS patches for late v4.7 (hopefully).

Best regards,
Krzysztof