linux-imx

/*

 * Copyright (C) 2009 Red Hat <mjg@redhat.com>

 *

 * Permission is hereby granted, free of charge, to any person obtaining

 * a copy of this software and associated documentation files (the

 * "Software"), to deal in the Software without restriction, including

 * without limitation the rights to use, copy, modify, merge, publish,

 * distribute, sublicense, and/or sell copies of the Software, and to

 * permit persons to whom the Software is furnished to do so, subject to

 * the following conditions:

 *

 * The above copyright notice and this permission notice (including the

 * next paragraph) shall be included in all copies or substantial

 * portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE

 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 */

​

/*

 * Authors:

 *  Matthew Garrett <mjg@redhat.com>

 *

 * Register locations derived from NVClock by Roderick Colenbrander

 */

​

#include <linux/apple-gmux.h>

#include <linux/backlight.h>

#include <linux/idr.h>

​

#include "nouveau_drv.h"

#include "nouveau_reg.h"

#include "nouveau_encoder.h"

#include "nouveau_connector.h"

​

static struct ida bl_ida;

#define BL_NAME_SIZE 15 // 12 for name + 2 for digits + 1 for '\0'

​

struct nouveau_backlight {

    struct backlight_device *dev;

    int id;

};

​

static bool

nouveau_get_backlight_name(char backlight_name[BL_NAME_SIZE],

               struct nouveau_backlight *bl)

{

    const int nb = ida_simple_get(&bl_ida, 0, 0, GFP_KERNEL);

    if (nb < 0 || nb >= 100)

        return false;

    if (nb > 0)

        snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight%d", nb);

    else

        snprintf(backlight_name, BL_NAME_SIZE, "nv_backlight");

    bl->id = nb;

    return true;

}