From: Mark Brown <broonie@kernel.org>
To: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Stephen Boyd <sboyd@kernel.org>,
alexandre.belloni@bootlin.com,
Michael Turquette <mturquette@baylibre.com>,
Ludovic.Desroches@microchip.com, lee.jones@linaro.org,
linux-clk@vger.kernel.org, linux-rtc@vger.kernel.org,
Russell King <linux@armlinux.org.uk>,
o.rempel@pengutronix.de, andy.shevchenko@gmail.com,
aardelean@deviqon.com, linux-pwm@vger.kernel.org,
Arnd Bergmann <arnd@arndb.de>,
Jonathan.Cameron@huawei.com,
linux-arm-kernel@lists.infradead.org, a.zummo@towertech.it,
linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
wsa@kernel.org, thierry.reding@gmail.com, kernel@pengutronix.de,
akpm@linux-foundation.org, torvalds@linux-foundation.org,
Claudiu.Beznea@microchip.com
Subject: Re: About clk maintainership [Was: Re: [PULL] Add variants of devm_clk_get for prepared and enabled clocks enabled clocks]
Date: Tue, 14 Sep 2021 14:52:17 +0100 [thread overview]
Message-ID: <20210914135217.GD4434@sirena.org.uk> (raw)
In-Reply-To: <20210914132256.5ucytcfmk3sjn2vi@pengutronix.de>
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On Tue, Sep 14, 2021 at 03:22:56PM +0200, Uwe Kleine-König wrote:
> On Thu, Aug 05, 2021 at 05:26:16PM -0700, Stephen Boyd wrote:
> > This proves why this topic is always contentious. It's too easy to
> > blindly convert drivers to get the clk and leave it enabled forever and
> > then they never use power management. The janitors win and nobody else.
> If the janitors win and nobody else looses anything, this is fine for
> me. And if in the future someone turns up who cares enough to improve
> the converted drivers to a more efficient clock usage, they will
> probably not stop their efforts just because then the driver uses
> devm_clk_get_enabled.
The patterns that concern me are people either blindly converting to
devm without checking for other usage and causing problems as a result
(some of the janitorial stuff is done very mechanically) or thinking
it's important to keep devm_ used (or not thinking through the
interaction) and trying to do that while doing something more active.
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WARNING: multiple messages have this Message-ID (diff)
From: Mark Brown <broonie@kernel.org>
To: "Uwe Kleine-König" <u.kleine-koenig@pengutronix.de>
Cc: Stephen Boyd <sboyd@kernel.org>,
alexandre.belloni@bootlin.com,
Michael Turquette <mturquette@baylibre.com>,
Ludovic.Desroches@microchip.com, lee.jones@linaro.org,
linux-clk@vger.kernel.org, linux-rtc@vger.kernel.org,
Russell King <linux@armlinux.org.uk>,
o.rempel@pengutronix.de, andy.shevchenko@gmail.com,
aardelean@deviqon.com, linux-pwm@vger.kernel.org,
Arnd Bergmann <arnd@arndb.de>,
Jonathan.Cameron@huawei.com,
linux-arm-kernel@lists.infradead.org, a.zummo@towertech.it,
linux-kernel@vger.kernel.org, linux-spi@vger.kernel.org,
wsa@kernel.org, thierry.reding@gmail.com, kernel@pengutronix.de,
akpm@linux-foundation.org, torvalds@linux-foundation.org,
Claudiu.Beznea@microchip.com
Subject: Re: About clk maintainership [Was: Re: [PULL] Add variants of devm_clk_get for prepared and enabled clocks enabled clocks]
Date: Tue, 14 Sep 2021 14:52:17 +0100 [thread overview]
Message-ID: <20210914135217.GD4434@sirena.org.uk> (raw)
In-Reply-To: <20210914132256.5ucytcfmk3sjn2vi@pengutronix.de>
[-- Attachment #1.1: Type: text/plain, Size: 1019 bytes --]
On Tue, Sep 14, 2021 at 03:22:56PM +0200, Uwe Kleine-König wrote:
> On Thu, Aug 05, 2021 at 05:26:16PM -0700, Stephen Boyd wrote:
> > This proves why this topic is always contentious. It's too easy to
> > blindly convert drivers to get the clk and leave it enabled forever and
> > then they never use power management. The janitors win and nobody else.
> If the janitors win and nobody else looses anything, this is fine for
> me. And if in the future someone turns up who cares enough to improve
> the converted drivers to a more efficient clock usage, they will
> probably not stop their efforts just because then the driver uses
> devm_clk_get_enabled.
The patterns that concern me are people either blindly converting to
devm without checking for other usage and causing problems as a result
(some of the janitorial stuff is done very mechanically) or thinking
it's important to keep devm_ used (or not thinking through the
interaction) and trying to do that while doing something more active.
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next prev parent reply other threads:[~2021-09-14 13:52 UTC|newest]
Thread overview: 75+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-05-10 17:41 [PATCH v7 0/6] clk: provide new devm helpers for prepared and enabled clocks Uwe Kleine-König
2021-05-10 17:41 ` Uwe Kleine-König
2021-05-10 17:41 ` [PATCH v7 1/6] clk: generalize devm_clk_get() a bit Uwe Kleine-König
2021-05-10 17:41 ` Uwe Kleine-König
2021-05-10 17:41 ` [PATCH v7 2/6] clk: Provide new devm_clk_helpers for prepared and enabled clocks Uwe Kleine-König
2021-05-10 17:41 ` Uwe Kleine-König
2021-05-10 17:41 ` [PATCH v7 3/6] pwm: atmel: Simplify using devm_clk_get_prepared() Uwe Kleine-König
2021-05-10 17:41 ` [PATCH v7 4/6] rtc: at91sam9: Simplify using devm_clk_get_enabled() Uwe Kleine-König
2021-05-10 17:41 ` Uwe Kleine-König
2021-05-10 17:41 ` [PATCH v7 5/6] i2c: imx: " Uwe Kleine-König
2021-05-10 17:41 ` Uwe Kleine-König
2021-05-10 17:41 ` [PATCH v7 6/6] spi: davinci: " Uwe Kleine-König
2021-05-11 7:58 ` [PATCH v7 0/6] clk: provide new devm helpers for prepared and enabled clocks Alexandru Ardelean
2021-05-11 7:58 ` Alexandru Ardelean
2021-05-24 11:09 ` Uwe Kleine-König
2021-05-24 11:09 ` Uwe Kleine-König
2021-06-09 20:21 ` [PULL] Add variants of devm_clk_get for prepared and enabled clocks " Uwe Kleine-König
2021-06-25 17:14 ` Uwe Kleine-König
2021-06-25 17:14 ` Uwe Kleine-König
2021-07-05 8:01 ` Uwe Kleine-König
2021-07-05 8:01 ` Uwe Kleine-König
2021-07-22 6:06 ` Uwe Kleine-König
2021-07-22 6:06 ` Uwe Kleine-König
2021-07-22 7:40 ` Wolfram Sang
2021-07-22 7:40 ` Wolfram Sang
2021-07-22 8:18 ` Uwe Kleine-König
2021-07-22 8:18 ` Uwe Kleine-König
2021-07-22 12:07 ` Wolfram Sang
2021-07-22 12:07 ` Wolfram Sang
[not found] ` <CAHp75VfC=s12Unw3+Cn0ag71mM5i90=Jbwj4nYwB5cPKiUTRSA@mail.gmail.com>
2021-07-23 9:13 ` Uwe Kleine-König
2021-07-23 9:13 ` Uwe Kleine-König
2021-07-26 9:18 ` Claudiu.Beznea
2021-07-26 9:18 ` Claudiu.Beznea
2021-07-26 9:52 ` Andy Shevchenko
2021-07-26 9:52 ` Andy Shevchenko
2021-07-26 12:32 ` Wolfram Sang
2021-07-26 12:32 ` Wolfram Sang
2021-07-26 13:28 ` Andy Shevchenko
2021-07-26 13:28 ` Andy Shevchenko
2021-07-26 17:40 ` Wolfram Sang
2021-07-26 17:40 ` Wolfram Sang
2021-07-28 20:25 ` About clk maintainership [Was: Re: [PULL] Add variants of devm_clk_get for prepared and enabled clocks enabled clocks] Uwe Kleine-König
2021-07-28 20:25 ` Uwe Kleine-König
2021-07-28 20:40 ` Russell King (Oracle)
2021-07-28 20:40 ` Russell King (Oracle)
2021-07-31 7:41 ` Stephen Boyd
2021-07-31 7:41 ` Stephen Boyd
2021-07-31 8:07 ` Andy Shevchenko
2021-07-31 8:07 ` Andy Shevchenko
2021-07-31 12:00 ` Uwe Kleine-König
2021-07-31 12:00 ` Uwe Kleine-König
2021-08-02 9:36 ` Jonathan Cameron
2021-08-02 9:36 ` Jonathan Cameron
2021-08-02 9:48 ` Russell King (Oracle)
2021-08-02 9:48 ` Russell King (Oracle)
2021-08-02 15:27 ` Uwe Kleine-König
2021-08-02 15:27 ` Uwe Kleine-König
2021-08-02 16:38 ` Russell King (Oracle)
2021-08-02 16:38 ` Russell King (Oracle)
2021-08-02 17:13 ` Andy Shevchenko
2021-08-02 17:13 ` Andy Shevchenko
2021-08-02 20:28 ` Russell King (Oracle)
2021-08-02 20:28 ` Russell King (Oracle)
2021-08-03 8:11 ` Stephen Boyd
2021-08-03 8:11 ` Stephen Boyd
2021-08-03 10:40 ` Uwe Kleine-König
2021-08-03 10:40 ` Uwe Kleine-König
2021-08-06 0:26 ` Stephen Boyd
2021-08-06 0:26 ` Stephen Boyd
2021-09-14 13:22 ` Uwe Kleine-König
2021-09-14 13:22 ` Uwe Kleine-König
2021-09-14 13:52 ` Mark Brown [this message]
2021-09-14 13:52 ` Mark Brown
2021-08-03 7:44 ` Stephen Boyd
2021-08-03 7:44 ` Stephen Boyd
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