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/*
* Copyright (C) 2010-2011 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* 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.
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <linux/mm.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/uaccess.h>
#include <linux/kd.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/input.h>
#include <linux/irq.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/powerkey.h>
struct mxc_pwrkey_priv {
struct input_dev *input;
int value;
int (*get_status) (int);
};
static struct mxc_pwrkey_priv *mxc_pwrkey;
static void pwrkey_event_handler(void *param)
{
int pressed;
pressed = mxc_pwrkey->get_status((int)param);
if (pressed) {
input_report_key(
mxc_pwrkey->input, mxc_pwrkey->value, 1);
pr_info("%s_Keydown\n", __func__);
} else {
input_report_key(
mxc_pwrkey->input, mxc_pwrkey->value, 0);
pr_info("%s_Keyup\n", __func__);
}
}
static int mxcpwrkey_probe(struct platform_device *pdev)
{
int retval;
struct input_dev *input;
struct power_key_platform_data *pdata = pdev->dev.platform_data;
if (mxc_pwrkey) {
dev_warn(&pdev->dev, "two power key??\n");
return -EBUSY;
}
if (!pdata || !pdata->get_key_status) {
dev_err(&pdev->dev, "can not get platform data\n");
return -EINVAL;
}
mxc_pwrkey = kmalloc(sizeof(struct mxc_pwrkey_priv), GFP_KERNEL);
if (!mxc_pwrkey) {
dev_err(&pdev->dev, "can not allocate private data");
return -ENOMEM;
}
input = input_allocate_device();
if (!input) {
dev_err(&pdev->dev, "no memory for input device\n");
retval = -ENOMEM;
goto err1;
}
input->name = "mxc_power_key";
input->phys = "mxcpwrkey/input0";
input->id.bustype = BUS_HOST;
input->evbit[0] = BIT_MASK(EV_KEY);
mxc_pwrkey->value = pdata->key_value;
mxc_pwrkey->get_status = pdata->get_key_status;
mxc_pwrkey->input = input;
pdata->register_pwrkey(pwrkey_event_handler);
input_set_capability(input, EV_KEY, mxc_pwrkey->value);
retval = input_register_device(input);
if (retval < 0) {
dev_err(&pdev->dev, "failed to register input device\n");
goto err2;
}
printk(KERN_INFO "PMIC powerkey probe\n");
return 0;
err2:
input_free_device(input);
err1:
kfree(mxc_pwrkey);
mxc_pwrkey = NULL;
return retval;
}
static int mxcpwrkey_remove(struct platform_device *pdev)
{
input_unregister_device(mxc_pwrkey->input);
input_free_device(mxc_pwrkey->input);
kfree(mxc_pwrkey);
mxc_pwrkey = NULL;
return 0;
}
static struct platform_driver mxcpwrkey_driver = {
.driver = {
.name = "mxcpwrkey",
},
.probe = mxcpwrkey_probe,
.remove = mxcpwrkey_remove,
};
static int __init mxcpwrkey_init(void)
{
return platform_driver_register(&mxcpwrkey_driver);
}
static void __exit mxcpwrkey_exit(void)
{
platform_driver_unregister(&mxcpwrkey_driver);
}
module_init(mxcpwrkey_init);
module_exit(mxcpwrkey_exit);
MODULE_AUTHOR("Freescale Semiconductor");
MODULE_DESCRIPTION("MXC board power key Driver");
MODULE_LICENSE("GPL");
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