/*
* Retu power button driver .
*
* Copyright ( C ) 2004 - 2010 Nokia Corporation
*
* Original code written by Ari Saastamoinen , Juha Yrj ö l ä and Felipe Balbi .
* Rewritten by Aaro Koskinen .
*
* 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 .
*/
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/retu.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#define RETU_STATUS_PWRONX (1 << 5 )
static irqreturn_t retu_pwrbutton_irq(int irq, void *_pwr)
{
struct input_dev *idev = _pwr;
struct retu_dev *rdev = input_get_drvdata(idev);
bool state;
state = !(retu_read(rdev, RETU_REG_STATUS) & RETU_STATUS_PWRONX);
input_report_key(idev, KEY_POWER, state);
input_sync(idev);
return IRQ_HANDLED;
}
static int retu_pwrbutton_probe(struct platform_device *pdev)
{
struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent);
struct input_dev *idev;
int irq;
int error;
irq = platform_get_irq(pdev, 0 );
if (irq < 0 )
return irq;
idev = devm_input_allocate_device(&pdev->dev);
if (!idev)
return -ENOMEM;
idev->name = "retu-pwrbutton" ;
idev->dev.parent = &pdev->dev;
input_set_capability(idev, EV_KEY, KEY_POWER);
input_set_drvdata(idev, rdev);
error = devm_request_threaded_irq(&pdev->dev, irq,
NULL, retu_pwrbutton_irq,
IRQF_ONESHOT,
"retu-pwrbutton" , idev);
if (error)
return error;
error = input_register_device(idev);
if (error)
return error;
return 0 ;
}
static struct platform_driver retu_pwrbutton_driver = {
.probe = retu_pwrbutton_probe,
.driver = {
.name = "retu-pwrbutton" ,
},
};
module_platform_driver(retu_pwrbutton_driver);
MODULE_ALIAS("platform:retu-pwrbutton" );
MODULE_DESCRIPTION("Retu Power Button" );
MODULE_AUTHOR("Ari Saastamoinen" );
MODULE_AUTHOR("Felipe Balbi" );
MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>" );
MODULE_LICENSE("GPL" );
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(vorverarbeitet am 2026-10-01)
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