rockbox/firmware/target/arm/gigabeat/meg-fx/backlight-meg-fx.c

/***************************************************************************
 *             __________               __   ___.
 *   Open      \______   \ ____   ____ |  | _\_ |__   _______  ___
 *   Source     |       _//  _ \_/ ___\|  |/ /| __ \ /  _ \  \/  /
 *   Jukebox    |    |   (  <_> )  \___|    < | \_\ (  <_> > <  <
 *   Firmware   |____|_  /\____/ \___  >__|_ \|___  /\____/__/\_ \
 *                     \/            \/     \/    \/            \/
 * $Id$
 *
 * Copyright (C) 2006 by Linus Nielsen Feltzing
 *
 * All files in this archive are subject to the GNU General Public License.
 * See the file COPYING in the source tree root for full license agreement.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 ****************************************************************************/
#include "config.h"
#include "cpu.h"
#include "system.h"
#include "backlight-target.h"
#include "backlight.h"
#include "lcd.h"
#include "sc606-meg-fx.h"

static int confval = SC606_LOW_FREQ;

void __backlight_init(void)
{
}

void __backlight_on(void)
{
    confval |= (SC606_LED_A1 | SC606_LED_A2);
    sc606_write(SC606_REG_CONF, confval);
}

void __backlight_off(void)
{
    confval &= ~(SC606_LED_A1 | SC606_LED_A2);
    sc606_write(SC606_REG_CONF, confval);
}

void __backlight_set_brightness(int brightness)
{
    /* The SC606 LED driver can set the brightness in 64 steps */
    brightness &= 0x3F;
    sc606_write(SC606_REG_A, brightness);
}