linux-kernel - Re: [PATCH 3/4] Input: adp5588-keys - switch to using managed resources

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Date:   Sun, 29 May 2022 08:11:15 +0200
From:   Uwe Kleine-König <u.kleine-koenig@...gutronix.de>
To:     Dmitry Torokhov <dmitry.torokhov@...il.com>
Cc:     Michael Hennerich <michael.hennerich@...log.com>,
        linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 3/4] Input: adp5588-keys - switch to using managed
 resources

On Sat, May 28, 2022 at 10:22:07PM -0700, Dmitry Torokhov wrote:
> On Sat, May 28, 2022 at 09:37:55PM +0200, Uwe Kleine-König wrote:
> > On Fri, May 27, 2022 at 09:56:30PM -0700, Dmitry Torokhov wrote:
> > > This simplifies error handling in probe() and reduces amount of explicit
> > > code in remove().
> > > 
> > > Signed-off-by: Dmitry Torokhov <dmitry.torokhov@...il.com>
> > > ---
> > >  drivers/input/keyboard/adp5588-keys.c | 111 +++++++++++---------------
> > >  1 file changed, 45 insertions(+), 66 deletions(-)
> > > 
> > > diff --git a/drivers/input/keyboard/adp5588-keys.c b/drivers/input/keyboard/adp5588-keys.c
> > > index ac21873ba1d7..df84a2998ed2 100644
> > > --- a/drivers/input/keyboard/adp5588-keys.c
> > > +++ b/drivers/input/keyboard/adp5588-keys.c
> > > @@ -182,6 +182,21 @@ static int adp5588_build_gpiomap(struct adp5588_kpad *kpad,
> > >  	return n_unused;
> > >  }
> > >  
> > > +static void adp5588_gpio_do_teardown(void *_kpad)
> > > +{
> > > +	struct adp5588_kpad *kpad = _kpad;
> > > +	struct device *dev = &kpad->client->dev;
> > > +	const struct adp5588_kpad_platform_data *pdata = dev_get_platdata(dev);
> > > +	const struct adp5588_gpio_platform_data *gpio_data = pdata->gpio_data;
> > > +	int error;
> > > +
> > > +	error = gpio_data->teardown(kpad->client,
> > > +				    kpad->gc.base, kpad->gc.ngpio,
> > > +				    gpio_data->context);
> > > +	if (error)
> > > +		dev_warn(&kpad->client->dev, "teardown failed %d\n", error);
> > > +}
> > 
> > I think the more sensible approach is to drop support for setup and
> > teardown. Maybe even rip all usage of adp5588_gpio_platform_data.
> 
> That will come with the transition to device tree/device properties. For
> now wanted to keep existing functionality intact.

That's up to you. I wouldn't spend an effort to clean up a feature that
is about to be removed.

Best regards
Uwe

-- 
Pengutronix e.K.                           | Uwe Kleine-König            |
Industrial Linux Solutions                 | https://www.pengutronix.de/ |

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