linux-imx

/*

 * Marvell 88PM80x ONKEY driver

 *

 * Copyright (C) 2012 Marvell International Ltd.

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

 * Qiao Zhou <zhouqiao@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/input.h>

#include <linux/mfd/88pm80x.h>

#include <linux/regmap.h>

#include <linux/slab.h>

​

#define PM800_LONG_ONKEY_EN     (1 << 0)

#define PM800_LONG_KEY_DELAY        (8) /* 1 .. 16 seconds */

#define PM800_LONKEY_PRESS_TIME     ((PM800_LONG_KEY_DELAY-1) << 4)

#define PM800_LONKEY_PRESS_TIME_MASK    (0xF0)

#define PM800_SW_PDOWN          (1 << 5)

​

struct pm80x_onkey_info {

    struct input_dev *idev;

    struct pm80x_chip *pm80x;

    struct regmap *map;

    int irq;

};

​

/* 88PM80x gives us an interrupt when ONKEY is held */

static irqreturn_t pm80x_onkey_handler(int irq, void *data)

{

    struct pm80x_onkey_info *info = data;

    int ret = 0;

    unsigned int val;

​

    ret = regmap_read(info->map, PM800_STATUS_1, &val);

    if (ret < 0) {

        dev_err(info->idev->dev.parent, "failed to read status: %d\n", ret);

        return IRQ_NONE;

    }

    val &= PM800_ONKEY_STS1;

​

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

    input_sync(info->idev);

​

    return IRQ_HANDLED;

}

​

static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_dev_suspend,

             pm80x_dev_resume);