From: Russell King - ARM Linux admin <linux@armlinux.org.uk>
To: Marc Gonzalez <marc.w.gonzalez@free.fr>
Cc: Stephen Boyd <sboyd@kernel.org>,
Michael Turquette <mturquette@baylibre.com>,
linux-clk <linux-clk@vger.kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH v1] clk: Add devm_clk_{prepare,enable,prepare_enable}
Date: Mon, 25 Nov 2019 12:55:30 +0000 [thread overview]
Message-ID: <20191125125530.GP25745@shell.armlinux.org.uk> (raw)
In-Reply-To: <34e32662-c909-9eb3-e561-3274ad0bf3cc@free.fr>
On Mon, Nov 25, 2019 at 01:46:51PM +0100, Marc Gonzalez wrote:
> On 15/07/2019 17:34, Marc Gonzalez wrote:
>
> > Provide devm variants for automatic resource release on device removal.
> > probe() error-handling is simpler, and remove is no longer required.
> >
> > Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
> > ---
> > Documentation/driver-model/devres.rst | 3 +++
> > drivers/clk/clk.c | 24 ++++++++++++++++++++++++
> > include/linux/clk.h | 8 ++++++++
> > 3 files changed, 35 insertions(+)
> >
> > diff --git a/Documentation/driver-model/devres.rst b/Documentation/driver-model/devres.rst
> > index 1b6ced8e4294..9357260576ef 100644
> > --- a/Documentation/driver-model/devres.rst
> > +++ b/Documentation/driver-model/devres.rst
> > @@ -253,6 +253,9 @@ CLOCK
> > devm_clk_hw_register()
> > devm_of_clk_add_hw_provider()
> > devm_clk_hw_register_clkdev()
> > + devm_clk_prepare()
> > + devm_clk_enable()
> > + devm_clk_prepare_enable()
> >
> > DMA
> > dmaenginem_async_device_register()
> > diff --git a/drivers/clk/clk.c b/drivers/clk/clk.c
> > index c0990703ce54..5e85548357c0 100644
> > --- a/drivers/clk/clk.c
> > +++ b/drivers/clk/clk.c
> > @@ -914,6 +914,18 @@ int clk_prepare(struct clk *clk)
> > }
> > EXPORT_SYMBOL_GPL(clk_prepare);
> >
> > +static void unprepare(void *clk)
> > +{
> > + clk_unprepare(clk);
> > +}
> > +
> > +int devm_clk_prepare(struct device *dev, struct clk *clk)
> > +{
> > + int rc = clk_prepare(clk);
> > + return rc ? : devm_add_action_or_reset(dev, unprepare, clk);
> > +}
> > +EXPORT_SYMBOL_GPL(devm_clk_prepare);
> > +
> > static void clk_core_disable(struct clk_core *core)
> > {
> > lockdep_assert_held(&enable_lock);
> > @@ -1136,6 +1148,18 @@ int clk_enable(struct clk *clk)
> > }
> > EXPORT_SYMBOL_GPL(clk_enable);
> >
> > +static void disable(void *clk)
> > +{
> > + clk_disable(clk);
> > +}
> > +
> > +int devm_clk_enable(struct device *dev, struct clk *clk)
> > +{
> > + int rc = clk_enable(clk);
> > + return rc ? : devm_add_action_or_reset(dev, disable, clk);
> > +}
> > +EXPORT_SYMBOL_GPL(devm_clk_enable);
> > +
> > static int clk_core_prepare_enable(struct clk_core *core)
> > {
> > int ret;
> > diff --git a/include/linux/clk.h b/include/linux/clk.h
> > index 3c096c7a51dc..d09b5207e3f1 100644
> > --- a/include/linux/clk.h
> > +++ b/include/linux/clk.h
> > @@ -895,6 +895,14 @@ static inline void clk_restore_context(void) {}
> >
> > #endif
> >
> > +int devm_clk_prepare(struct device *dev, struct clk *clk);
> > +int devm_clk_enable(struct device *dev, struct clk *clk);
> > +static inline int devm_clk_prepare_enable(struct device *dev, struct clk *clk)
> > +{
> > + int rc = devm_clk_prepare(dev, clk);
> > + return rc ? : devm_clk_enable(dev, clk);
> > +}
> > +
> > /* clk_prepare_enable helps cases using clk_enable in non-atomic context. */
> > static inline int clk_prepare_enable(struct clk *clk)
> > {
>
> Thoughts? Comments?
It's also worth reading https://lore.kernel.org/patchwork/patch/755667/
and considering whether you really are using the clk_prepare() and
clk_enable() APIs correctly. Wanting these devm functions suggests
you aren't...
--
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTC broadband for 0.8mile line in suburbia: sync at 12.1Mbps down 622kbps up
According to speedtest.net: 11.9Mbps down 500kbps up
next prev parent reply other threads:[~2019-11-25 12:55 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-07-15 15:34 [PATCH v1] clk: Add devm_clk_{prepare,enable,prepare_enable} Marc Gonzalez
2019-07-15 21:46 ` Bjorn Andersson
2019-11-25 13:50 ` Marc Gonzalez
2019-07-16 0:25 ` Guenter Roeck
2019-07-16 8:18 ` Marc Gonzalez
2019-08-20 8:46 ` Marc Gonzalez
2019-11-25 12:46 ` Marc Gonzalez
2019-11-25 12:51 ` Marc Gonzalez
2019-11-25 12:52 ` Russell King - ARM Linux admin
2019-11-25 13:16 ` Marc Gonzalez
2019-11-25 13:31 ` Russell King - ARM Linux admin
2019-11-25 13:34 ` Marc Gonzalez
2019-11-25 13:38 ` Russell King - ARM Linux admin
2019-11-25 12:55 ` Russell King - ARM Linux admin [this message]
2019-11-25 13:10 ` Marc Gonzalez
2019-11-25 13:37 ` Russell King - ARM Linux admin
2019-11-25 14:11 ` Marc Gonzalez
2019-11-25 20:43 ` Geert Uytterhoeven
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20191125125530.GP25745@shell.armlinux.org.uk \
--to=linux@armlinux.org.uk \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-clk@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=marc.w.gonzalez@free.fr \
--cc=mturquette@baylibre.com \
--cc=sboyd@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).