171 lines
4.4 KiB
C
171 lines
4.4 KiB
C
/*
|
|
* 88pm860x_onkey.c - Marvell 88PM860x 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/88pm860x.h>
|
|
#include <linux/slab.h>
|
|
|
|
#define PM8607_WAKEUP 0x0b
|
|
|
|
#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 __devinit 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) {
|
|
dev_err(&pdev->dev, "No IRQ resource!\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
info = kzalloc(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 = input_allocate_device();
|
|
if (!info->idev) {
|
|
dev_err(chip->dev, "Failed to allocate input dev\n");
|
|
ret = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
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);
|
|
goto out_reg;
|
|
}
|
|
|
|
ret = request_threaded_irq(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);
|
|
goto out_irq;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
device_init_wakeup(&pdev->dev, 1);
|
|
|
|
return 0;
|
|
|
|
out_irq:
|
|
input_unregister_device(info->idev);
|
|
kfree(info);
|
|
return ret;
|
|
|
|
out_reg:
|
|
input_free_device(info->idev);
|
|
out:
|
|
kfree(info);
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit pm860x_onkey_remove(struct platform_device *pdev)
|
|
{
|
|
struct pm860x_onkey_info *info = platform_get_drvdata(pdev);
|
|
|
|
free_irq(info->irq, info);
|
|
input_unregister_device(info->idev);
|
|
kfree(info);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
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;
|
|
}
|
|
#endif
|
|
|
|
static 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",
|
|
.owner = THIS_MODULE,
|
|
.pm = &pm860x_onkey_pm_ops,
|
|
},
|
|
.probe = pm860x_onkey_probe,
|
|
.remove = __devexit_p(pm860x_onkey_remove),
|
|
};
|
|
module_platform_driver(pm860x_onkey_driver);
|
|
|
|
MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver");
|
|
MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
|
|
MODULE_LICENSE("GPL");
|