linux-kernel - Re: [PATCH] rtc: rtc-v3020: use gpio_request

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Message-id: <008901ce10a2$23c9fef0$6b5dfcd0$%han@samsung.com>
Date:	Fri, 22 Feb 2013 11:13:01 +0900
From:	Jingoo Han <jg1.han@...sung.com>
To:	'Igor Grinberg' <grinberg@...pulab.co.il>
Cc:	'Andrew Morton' <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	'Alessandro Zummo' <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com, 'Jingoo Han' <jg1.han@...sung.com>
Subject: Re: [PATCH] rtc: rtc-v3020: use gpio_request_one()

On Thursday, February 21, 2013 5:48 PM, Igor Grinberg wrote:
> 
> On 02/21/13 10:31, Jingoo Han wrote:
> > Using gpio_request_one() can make the code simpler because it can
> > set the direction and initial value in one shot.
> 
> If you are on this, then I think converting to gpio_request_array()
> would be even better.

Hi Igor Grinberg,

OK, I see.
I will use gpio_request_array() and send v2 patch soon.
Thank you for your comment.


Best regards,
Jingoo Han

> 
> >
> > Signed-off-by: Jingoo Han <jg1.han@...sung.com>
> > ---
> >  drivers/rtc/rtc-v3020.c |    5 ++---
> >  1 files changed, 2 insertions(+), 3 deletions(-)
> >
> > diff --git a/drivers/rtc/rtc-v3020.c b/drivers/rtc/rtc-v3020.c
> > index bca5d67..d59cd24 100644
> > --- a/drivers/rtc/rtc-v3020.c
> > +++ b/drivers/rtc/rtc-v3020.c
> > @@ -125,11 +125,10 @@ static int v3020_gpio_map(struct v3020 *chip, struct platform_device *pdev,
> >  	v3020_gpio[V3020_IO].gpio = pdata->gpio_io;
> >
> >  	for (i = 0; i < ARRAY_SIZE(v3020_gpio); i++) {
> > -		err = gpio_request(v3020_gpio[i].gpio, v3020_gpio[i].name);
> > +		err = gpio_request_one(v3020_gpio[i].gpio, GPIOF_OUT_INIT_HIGH,
> > +					v3020_gpio[i].name);
> >  		if (err)
> >  			goto err_request;
> > -
> > -		gpio_direction_output(v3020_gpio[i].gpio, 1);
> >  	}
> 
> If you convert to gpio_request_array(), you can also drop the for loop.
> 
> >
> >  	chip->gpio = v3020_gpio;
> >
> 
> --
> Regards,
> Igor.

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