linux-kernel - Re: [PATCH v4 2/6] drivers:staging: ti-st: fmdrv

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Date:	Wed, 17 Nov 2010 09:24:01 +0800
From:	"Figo.zhang" <zhangtianfei@...dcoretech.com>
To:	manjunatha_halli@...com
CC:	mchehab@...radead.org, hverkuil@...all.nl,
	linux-kernel@...r.kernel.org, linux-media@...r.kernel.org
Subject: Re: [PATCH v4 2/6] drivers:staging: ti-st: fmdrv_v4l2 sources

于 11/16/2010 09:18 PM, manjunatha_halli@...com 写道:
> From: Manjunatha Halli<manjunatha_halli@...com>
> 
> This module interfaces V4L2 subsystem and FM common
> module. It registers itself with V4L2 as Radio module.
> 
> Signed-off-by: Manjunatha Halli<manjunatha_halli@...com>
> ---
>   drivers/staging/ti-st/fmdrv_v4l2.c |  757 ++++++++++++++++++++++++++++++++++++
>   drivers/staging/ti-st/fmdrv_v4l2.h |   32 ++
>   2 files changed, 789 insertions(+), 0 deletions(-)
>   create mode 100644 drivers/staging/ti-st/fmdrv_v4l2.c
>   create mode 100644 drivers/staging/ti-st/fmdrv_v4l2.h
> 
> diff --git a/drivers/staging/ti-st/fmdrv_v4l2.c b/drivers/staging/ti-st/fmdrv_v4l2.c
> new file mode 100644
> index 0000000..687d10f
> --- /dev/null
> +++ b/drivers/staging/ti-st/fmdrv_v4l2.c
> @@ -0,0 +1,757 @@
> +/*
> + *  FM Driver for Connectivity chip of Texas Instruments.
> + *  This file provides interfaces to V4L2 subsystem.
> + *
> + *  This module registers with V4L2 subsystem as Radio
> + *  data system interface (/dev/radio). During the registration,
> + *  it will expose two set of function pointers.
> + *
> + *    1) File operation related API (open, close, read, write, poll...etc).
> + *    2) Set of V4L2 IOCTL complaint API.
> + *
> + *  Copyright (C) 2010 Texas Instruments
> + *  Author: Raja Mani<raja_mani@...com>
> + *
> + *  This program is free software; you can redistribute it and/or modify
> + *  it under the terms of the GNU General Public License version 2 as
> + *  published by the Free Software Foundation.
> + *
> + *  This program is distributed in the hope that it will be useful,
> + *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *  GNU General Public License for more details.
> + *
> + *  You should have received a copy of the GNU General Public License
> + *  along with this program; if not, write to the Free Software
> + *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
> + *
> + */
> +
> +#include "fmdrv.h"
> +#include "fmdrv_v4l2.h"
> +#include "fmdrv_common.h"
> +#include "fmdrv_rx.h"
> +#include "fmdrv_tx.h"
> +
> +static struct video_device *gradio_dev;

why are you using global variable here?

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