linux-imx

/*

 * 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver

 *

 * Copyright (C) 2009-2010 Marvell International Ltd.

 *      Haojian Zhuang <haojian.zhuang@marvell.com>

 *

 * This file is subject to the terms and conditions of the GNU General

 * Public License. See the file "COPYING" in the main directory of this

 * archive for more details.

 *

 * 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 <linux/kernel.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/i2c.h>

#include <linux/input.h>

#include <linux/interrupt.h>

#include <linux/mfd/88pm860x.h>

#include <linux/slab.h>

#include <linux/device.h>

​

#define PM8607_WAKEUP       0x0b

​

#define LONG_ONKEY_EN       (1 << 1)

#define ONKEY_STATUS        (1 << 0)

​

struct pm860x_onkey_info {

    struct input_dev    *idev;

    struct pm860x_chip  *chip;

    struct i2c_client   *i2c;

    struct device       *dev;

    int         irq;

};

​

/* 88PM860x gives us an interrupt when ONKEY is held */

static irqreturn_t pm860x_onkey_handler(int irq, void *data)

{

    struct pm860x_onkey_info *info = data;

    int ret;

​

    ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);

    ret &= ONKEY_STATUS;

    input_report_key(info->idev, KEY_POWER, ret);

    input_sync(info->idev);

​

    /* Enable 8-second long onkey detection */

    pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);

    return IRQ_HANDLED;

}

​

static int pm860x_onkey_probe(struct platform_device *pdev)

{

    struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);

    struct pm860x_onkey_info *info;