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

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Date:	Thu, 21 Feb 2013 10:48:28 +0200
From:	Igor Grinberg <grinberg@...pulab.co.il>
To:	Jingoo Han <jg1.han@...sung.com>
CC:	'Andrew Morton' <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	'Alessandro Zummo' <a.zummo@...ertech.it>,
	rtc-linux@...glegroups.com
Subject: Re: [PATCH] rtc: rtc-v3020: use gpio_request_one()

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.

> 
> 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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