/*
* 88 pm860x_onkey . c - Marvell 88 PM860x 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/88 pm860x.h>
#include <linux/slab.h>
#include <linux/device.h>
#define PM8607_WAKEUP 0 x0b
#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;
int irq, ret;
irq = platform_get_irq(pdev, 0 );
if (irq < 0 )
return -EINVAL;
info = devm_kzalloc(&pdev->dev, sizeof (struct pm860x_onkey_info),
GFP_KERNEL);
if (!info)
return -ENOMEM;
info->chip = chip;
info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
info->dev = &pdev->dev;
info->irq = irq;
info->idev = devm_input_allocate_device(&pdev->dev);
if (!info->idev) {
dev_err(chip->dev, "Failed to allocate input dev\n" );
return -ENOMEM;
}
info->idev->name = "88pm860x_on" ;
info->idev->phys = "88pm860x_on/input0" ;
info->idev->id.bustype = BUS_I2C;
info->idev->dev.parent = &pdev->dev;
info->idev->evbit[0 ] = BIT_MASK(EV_KEY);
info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
ret = input_register_device(info->idev);
if (ret) {
dev_err(chip->dev, "Can't register input device: %d\n" , ret);
return ret;
}
ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
pm860x_onkey_handler, IRQF_ONESHOT,
"onkey" , info);
if (ret < 0 ) {
dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n" ,
info->irq, ret);
return ret;
}
platform_set_drvdata(pdev, info);
device_init_wakeup(&pdev->dev, 1 );
return 0 ;
}
static int pm860x_onkey_suspend(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
if (device_may_wakeup(dev))
chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY;
return 0 ;
}
static int pm860x_onkey_resume(struct device *dev)
{
struct platform_device *pdev = to_platform_device(dev);
struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
if (device_may_wakeup(dev))
chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY);
return 0 ;
}
static DEFINE_SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops,
pm860x_onkey_suspend, pm860x_onkey_resume);
static struct platform_driver pm860x_onkey_driver = {
.driver = {
.name = "88pm860x-onkey" ,
.pm = pm_sleep_ptr(&pm860x_onkey_pm_ops),
},
.probe = pm860x_onkey_probe,
};
module_platform_driver(pm860x_onkey_driver);
MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver" );
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>" );
MODULE_LICENSE("GPL" );
Messung V0.5 in Prozent C=98 H=100 G=98
¤ Dauer der Verarbeitung: 0.12 Sekunden
(vorverarbeitet am 2026-09-28)
¤
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