linux-imx

/* NXP PCF50633 Input Driver

 *

 * (C) 2006-2008 by Openmoko, Inc.

 * Author: Balaji Rao <balajirrao@openmoko.org>

 * All rights reserved.

 *

 * Broken down from monstrous PCF50633 driver mainly by

 * Harald Welte, Andy Green and Werner Almesberger

 *

 *  This program is free software; you can redistribute  it and/or modify it

 *  under  the terms of  the GNU General  Public License as published by the

 *  Free Software Foundation;  either version 2 of the  License, or (at your

 *  option) any later version.

 *

 */

​

#include <linux/kernel.h>

#include <linux/module.h>

#include <linux/device.h>

#include <linux/platform_device.h>

#include <linux/input.h>

#include <linux/slab.h>

​

#include <linux/mfd/pcf50633/core.h>

​

#define PCF50633_OOCSTAT_ONKEY  0x01

#define PCF50633_REG_OOCSTAT    0x12

#define PCF50633_REG_OOCMODE    0x10

​

struct pcf50633_input {

    struct pcf50633 *pcf;

    struct input_dev *input_dev;

};

​

static void

pcf50633_input_irq(int irq, void *data)

{

    struct pcf50633_input *input;

    int onkey_released;

​

    input = data;

​

    /* We report only one event depending on the key press status */

    onkey_released = pcf50633_reg_read(input->pcf, PCF50633_REG_OOCSTAT)

                        & PCF50633_OOCSTAT_ONKEY;

​

    if (irq == PCF50633_IRQ_ONKEYF && !onkey_released)

        input_report_key(input->input_dev, KEY_POWER, 1);

    else if (irq == PCF50633_IRQ_ONKEYR && onkey_released)

        input_report_key(input->input_dev, KEY_POWER, 0);

​

    input_sync(input->input_dev);

}

​

static int pcf50633_input_probe(struct platform_device *pdev)

{

    struct pcf50633_input *input;

    struct input_dev *input_dev;

    int ret;

​

​

    input = kzalloc(sizeof(*input), GFP_KERNEL);

    if (!input)