From: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
To: Dongchun Zhu <dongchun.zhu@mediatek.com>
Cc: mchehab@kernel.org, robh+dt@kernel.org, mark.rutland@arm.com,
sakari.ailus@linux.intel.com, drinkcat@chromium.org,
tfiga@chromium.org, matthias.bgg@gmail.com, bingbu.cao@intel.com,
srv_heupstream@mediatek.com, linux-mediatek@lists.infradead.org,
linux-arm-kernel@lists.infradead.org, sj.huang@mediatek.com,
linux-media@vger.kernel.org, devicetree@vger.kernel.org,
louis.kuo@mediatek.com, shengnan.wang@mediatek.com
Subject: Re: [V4, 2/2] media: i2c: Add DW9768 VCM driver
Date: Tue, 31 Mar 2020 13:14:56 +0300 [thread overview]
Message-ID: <20200331101456.GG1922688@smile.fi.intel.com> (raw)
In-Reply-To: <1585620980.5781.80.camel@mhfsdcap03>
On Tue, Mar 31, 2020 at 10:16:20AM +0800, Dongchun Zhu wrote:
> On Mon, 2020-03-30 at 16:57 +0300, Andy Shevchenko wrote:
> > On Mon, Mar 30, 2020 at 08:36:34PM +0800, Dongchun Zhu wrote:
> > > This patch adds a V4L2 sub-device driver for DW9768 voice coil moter,
> > > providing control to set the desired focus via I2C serial interface.
> >
> > ...
> >
> > > +static const struct dev_pm_ops dw9768_pm_ops = {
> > > + SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
> > > + pm_runtime_force_resume)
> > > + SET_RUNTIME_PM_OPS(dw9768_runtime_suspend, dw9768_runtime_resume, NULL)
> > > +};
> > > +
> > > +static struct i2c_driver dw9768_i2c_driver = {
> > > + .driver = {
> > > + .name = DW9768_NAME,
> >
> > > + .pm = IS_ENABLED(CONFIG_PM) ? &dw9768_pm_ops : NULL,
> >
> > What is this conditional for?
> >
>
> For the dw9768_pm_ops, here my idea is to use an IS_ENABLED() check to
> avoid defining the structure when CONFIG_PM is not set.
Have you looked at the implementation of SET_SYSTEM_SLEEP_OPS() and another one?
Have you tried to actually compile with !CONFIG_PM? In your case the warning
should be issued.
--
With Best Regards,
Andy Shevchenko
next prev parent reply other threads:[~2020-03-31 10:14 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-03-30 12:36 [V4, 0/2] media: i2c: add support for DW9768 VCM driver Dongchun Zhu
2020-03-30 12:36 ` [V4, 1/2] media: i2c: dw9768: Add DT support and MAINTAINERS entry Dongchun Zhu
2020-04-10 17:25 ` Rob Herring
2020-04-30 8:42 ` Dongchun Zhu
2020-03-30 12:36 ` [V4, 2/2] media: i2c: Add DW9768 VCM driver Dongchun Zhu
2020-03-30 13:57 ` Andy Shevchenko
2020-03-31 2:16 ` Dongchun Zhu
2020-03-31 10:14 ` Andy Shevchenko [this message]
2020-04-30 8:47 ` Dongchun Zhu
2020-04-02 12:32 ` Sakari Ailus
2020-04-30 10:15 ` Dongchun Zhu
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