From: Viresh Kumar <viresh.kumar@linaro.org>
To: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Marek Szyprowski <m.szyprowski@samsung.com>,
krzk@kernel.org, robh+dt@kernel.org, vireshk@kernel.org,
devicetree@vger.kernel.org, kgene@kernel.org,
pankaj.dubey@samsung.com, linux-samsung-soc@vger.kernel.org,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org,
b.zolnierkie@samsung.com
Subject: Re: [PATCH v2 0/9] Exynos Adaptive Supply Voltage support
Date: Mon, 19 Aug 2019 16:55:33 +0530 [thread overview]
Message-ID: <20190819112533.bvfyinw7fsebkufr@vireshk-i7> (raw)
In-Reply-To: <b831d7c5-c830-fd65-20cf-02e209889c28@samsung.com>
On 19-08-19, 13:16, Sylwester Nawrocki wrote:
> On 8/19/19 11:09, Viresh Kumar wrote:
> > Will something like this help ?
> >
> > https://lore.kernel.org/lkml/1442623929-4507-3-git-send-email-sboyd@codeaurora.org/
> >
> > This never got merged but the idea was AVS only.
>
> It's quite interesting work, it seems to be for a more advanced use case
> where OPP voltage is being adjusted at runtime.
>
> We could use it instead of removing an OPP and then adding with updated
> voltage. On Exynos there is there is just a need to update OPPs once at boot
> time, so it is more "static". However the requirements could presumably
> change in future.
The API is about changing the values after they are parsed once from DT. You can
change it once or multiple times depending on the use case.
> If that's your preference I could switch to that notifier approach.
You shouldn't be required to use the notifier. Just add the OPP table and update
the values right after that. So no one would be using the values at that time.
> AFAICS the API would still need to be extended to support multiple voltages,
> when in future we add support for the Body Bias regulator.
Right.
Will this patchset solve the problems for you and make your DT light weight ?
--
viresh
WARNING: multiple messages have this Message-ID (diff)
From: Viresh Kumar <viresh.kumar@linaro.org>
To: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: devicetree@vger.kernel.org, linux-samsung-soc@vger.kernel.org,
linux-pm@vger.kernel.org, vireshk@kernel.org,
b.zolnierkie@samsung.com, linux-kernel@vger.kernel.org,
krzk@kernel.org, robh+dt@kernel.org, kgene@kernel.org,
pankaj.dubey@samsung.com, linux-arm-kernel@lists.infradead.org,
Marek Szyprowski <m.szyprowski@samsung.com>
Subject: Re: [PATCH v2 0/9] Exynos Adaptive Supply Voltage support
Date: Mon, 19 Aug 2019 16:55:33 +0530 [thread overview]
Message-ID: <20190819112533.bvfyinw7fsebkufr@vireshk-i7> (raw)
In-Reply-To: <b831d7c5-c830-fd65-20cf-02e209889c28@samsung.com>
On 19-08-19, 13:16, Sylwester Nawrocki wrote:
> On 8/19/19 11:09, Viresh Kumar wrote:
> > Will something like this help ?
> >
> > https://lore.kernel.org/lkml/1442623929-4507-3-git-send-email-sboyd@codeaurora.org/
> >
> > This never got merged but the idea was AVS only.
>
> It's quite interesting work, it seems to be for a more advanced use case
> where OPP voltage is being adjusted at runtime.
>
> We could use it instead of removing an OPP and then adding with updated
> voltage. On Exynos there is there is just a need to update OPPs once at boot
> time, so it is more "static". However the requirements could presumably
> change in future.
The API is about changing the values after they are parsed once from DT. You can
change it once or multiple times depending on the use case.
> If that's your preference I could switch to that notifier approach.
You shouldn't be required to use the notifier. Just add the OPP table and update
the values right after that. So no one would be using the values at that time.
> AFAICS the API would still need to be extended to support multiple voltages,
> when in future we add support for the Body Bias regulator.
Right.
Will this patchset solve the problems for you and make your DT light weight ?
--
viresh
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next prev parent reply other threads:[~2019-08-19 11:25 UTC|newest]
Thread overview: 74+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <CGME20190718143117eucas1p1e534b9075d10fbbbe427c66192205eb1@eucas1p1.samsung.com>
2019-07-18 14:30 ` [PATCH v2 0/9] Exynos Adaptive Supply Voltage support Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
[not found] ` <CGME20190718143127eucas1p13b1e2c98d270140a87f09562ef46c9a3@eucas1p1.samsung.com>
2019-07-18 14:30 ` [PATCH v2 1/9] soc: samsung: Add exynos chipid driver support Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
2019-07-23 12:57 ` Krzysztof Kozlowski
2019-07-23 12:57 ` Krzysztof Kozlowski
2019-07-23 14:10 ` Bartlomiej Zolnierkiewicz
2019-07-23 14:10 ` Bartlomiej Zolnierkiewicz
2019-07-23 14:10 ` Bartlomiej Zolnierkiewicz
2019-07-24 10:47 ` Krzysztof Kozlowski
2019-07-24 10:47 ` Krzysztof Kozlowski
2019-07-24 10:47 ` Krzysztof Kozlowski
2019-08-08 12:07 ` Sylwester Nawrocki
2019-08-08 12:07 ` Sylwester Nawrocki
[not found] ` <CGME20190718143128eucas1p2677ae16d229dddcd9a0db8084f0da5cf@eucas1p2.samsung.com>
2019-07-18 14:30 ` [PATCH v2 2/9] soc: samsung: Convert exynos-chipid driver to use the regmap API Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
2019-07-23 13:01 ` Krzysztof Kozlowski
2019-07-23 13:01 ` Krzysztof Kozlowski
2019-08-08 12:07 ` Sylwester Nawrocki
2019-08-08 12:07 ` Sylwester Nawrocki
[not found] ` <CGME20190718143130eucas1p26f2058f47eb2f4020e1ddbf1619d1ac8@eucas1p2.samsung.com>
2019-07-18 14:30 ` [PATCH v2 3/9] soc: samsung: Add Exynos Adaptive Supply Voltage driver Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
2019-07-23 13:38 ` Krzysztof Kozlowski
2019-07-23 13:38 ` Krzysztof Kozlowski
2019-08-08 12:07 ` Sylwester Nawrocki
2019-08-08 12:07 ` Sylwester Nawrocki
2019-08-08 12:31 ` Krzysztof Kozlowski
2019-08-08 12:31 ` Krzysztof Kozlowski
2019-08-08 12:31 ` Krzysztof Kozlowski
2019-08-08 12:48 ` Robin Murphy
2019-08-08 12:48 ` Robin Murphy
2019-08-08 13:14 ` Krzysztof Kozlowski
2019-08-08 13:14 ` Krzysztof Kozlowski
[not found] ` <CGME20190718143131eucas1p2e1afc9fe816fff52ee4d12e0979eeb4c@eucas1p2.samsung.com>
2019-07-18 14:30 ` [PATCH v2 4/9] ARM: EXYNOS: enable exynos_chipid for ARCH_EXYNOS Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
[not found] ` <CGME20190718143132eucas1p2afecae86f2ef17aa8a4a99df8ffa47d9@eucas1p2.samsung.com>
2019-07-18 14:30 ` [PATCH v2 5/9] ARM64: " Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
[not found] ` <CGME20190718143134eucas1p2aed09e2171d0d2d6b916dddac3637017@eucas1p2.samsung.com>
2019-07-18 14:30 ` [PATCH v2 6/9] ARM: EXYNOS: Enable exynos-asv driver " Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
[not found] ` <CGME20190718143135eucas1p2da5b7842b35327c60667064184619a9f@eucas1p2.samsung.com>
2019-07-18 14:30 ` [PATCH v2 7/9] soc: samsung: Update the CHIP ID DT binding documentation Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
[not found] ` <CGME20190718143136eucas1p2cedfe5ed5e8e6316e82b30a565dc4855@eucas1p2.samsung.com>
2019-07-18 14:30 ` [PATCH v2 8/9] ARM: dts: Add "syscon" compatible string to chipid node Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
[not found] ` <CGME20190718143138eucas1p127542c4cb8416cee9af6a95f4bc98366@eucas1p1.samsung.com>
2019-07-18 14:30 ` [PATCH v2 9/9] ARM: dts: Add samsung,asv-bin property for odroidxu3-lite Sylwester Nawrocki
2019-07-18 14:30 ` Sylwester Nawrocki
2019-07-23 2:04 ` [PATCH v2 0/9] Exynos Adaptive Supply Voltage support Viresh Kumar
2019-07-23 2:04 ` Viresh Kumar
2019-07-24 13:10 ` Marek Szyprowski
2019-07-24 13:10 ` Marek Szyprowski
2019-07-25 2:23 ` Viresh Kumar
2019-07-25 2:23 ` Viresh Kumar
2019-08-09 15:58 ` Sylwester Nawrocki
2019-08-09 15:58 ` Sylwester Nawrocki
2019-08-19 9:09 ` Viresh Kumar
2019-08-19 9:09 ` Viresh Kumar
2019-08-19 10:06 ` Viresh Kumar
2019-08-19 10:06 ` Viresh Kumar
2019-08-19 11:16 ` Sylwester Nawrocki
2019-08-19 11:16 ` Sylwester Nawrocki
2019-08-19 11:25 ` Viresh Kumar [this message]
2019-08-19 11:25 ` Viresh Kumar
2019-08-19 13:39 ` Sylwester Nawrocki
2019-08-19 13:39 ` Sylwester Nawrocki
2019-08-20 3:01 ` Viresh Kumar
2019-08-20 3:01 ` Viresh Kumar
2019-08-20 9:03 ` Sylwester Nawrocki
2019-08-20 9:03 ` Sylwester Nawrocki
2019-08-20 9:21 ` Viresh Kumar
2019-08-20 9:21 ` Viresh Kumar
2019-09-04 12:37 ` Sylwester Nawrocki
2019-09-04 12:37 ` Sylwester Nawrocki
2019-09-05 5:01 ` Viresh Kumar
2019-09-05 5:01 ` Viresh Kumar
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