167 lines
4.2 KiB
C
167 lines
4.2 KiB
C
/*
|
|
* Marvell 88PM80x ONKEY driver
|
|
*
|
|
* Copyright (C) 2012 Marvell International Ltd.
|
|
* Haojian Zhuang <haojian.zhuang@marvell.com>
|
|
* Qiao Zhou <zhouqiao@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/input.h>
|
|
#include <linux/mfd/88pm80x.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
|
|
#define PM800_LONG_ONKEY_EN (1 << 0)
|
|
#define PM800_LONG_KEY_DELAY (8) /* 1 .. 16 seconds */
|
|
#define PM800_LONKEY_PRESS_TIME ((PM800_LONG_KEY_DELAY-1) << 4)
|
|
#define PM800_LONKEY_PRESS_TIME_MASK (0xF0)
|
|
#define PM800_SW_PDOWN (1 << 5)
|
|
|
|
struct pm80x_onkey_info {
|
|
struct input_dev *idev;
|
|
struct pm80x_chip *pm80x;
|
|
struct regmap *map;
|
|
int irq;
|
|
};
|
|
|
|
/* 88PM80x gives us an interrupt when ONKEY is held */
|
|
static irqreturn_t pm80x_onkey_handler(int irq, void *data)
|
|
{
|
|
struct pm80x_onkey_info *info = data;
|
|
int ret = 0;
|
|
unsigned int val;
|
|
|
|
ret = regmap_read(info->map, PM800_STATUS_1, &val);
|
|
if (ret < 0) {
|
|
dev_err(info->idev->dev.parent, "failed to read status: %d\n", ret);
|
|
return IRQ_NONE;
|
|
}
|
|
val &= PM800_ONKEY_STS1;
|
|
|
|
input_report_key(info->idev, KEY_POWER, val);
|
|
input_sync(info->idev);
|
|
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_dev_suspend,
|
|
pm80x_dev_resume);
|
|
|
|
static int pm80x_onkey_probe(struct platform_device *pdev)
|
|
{
|
|
|
|
struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent);
|
|
struct pm80x_onkey_info *info;
|
|
int err;
|
|
|
|
info = kzalloc(sizeof(struct pm80x_onkey_info), GFP_KERNEL);
|
|
if (!info)
|
|
return -ENOMEM;
|
|
|
|
info->pm80x = chip;
|
|
|
|
info->irq = platform_get_irq(pdev, 0);
|
|
if (info->irq < 0) {
|
|
dev_err(&pdev->dev, "No IRQ resource!\n");
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
info->map = info->pm80x->regmap;
|
|
if (!info->map) {
|
|
dev_err(&pdev->dev, "no regmap!\n");
|
|
err = -EINVAL;
|
|
goto out;
|
|
}
|
|
|
|
info->idev = input_allocate_device();
|
|
if (!info->idev) {
|
|
dev_err(&pdev->dev, "Failed to allocate input dev\n");
|
|
err = -ENOMEM;
|
|
goto out;
|
|
}
|
|
|
|
info->idev->name = "88pm80x_on";
|
|
info->idev->phys = "88pm80x_on/input0";
|
|
info->idev->id.bustype = BUS_I2C;
|
|
info->idev->dev.parent = &pdev->dev;
|
|
info->idev->evbit[0] = BIT_MASK(EV_KEY);
|
|
__set_bit(KEY_POWER, info->idev->keybit);
|
|
|
|
err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler,
|
|
IRQF_ONESHOT, "onkey", info);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n",
|
|
info->irq, err);
|
|
goto out_reg;
|
|
}
|
|
|
|
err = input_register_device(info->idev);
|
|
if (err) {
|
|
dev_err(&pdev->dev, "Can't register input device: %d\n", err);
|
|
goto out_irq;
|
|
}
|
|
|
|
platform_set_drvdata(pdev, info);
|
|
|
|
/* Enable long onkey detection */
|
|
regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN,
|
|
PM800_LONG_ONKEY_EN);
|
|
/* Set 8-second interval */
|
|
regmap_update_bits(info->map, PM800_RTC_MISC3,
|
|
PM800_LONKEY_PRESS_TIME_MASK,
|
|
PM800_LONKEY_PRESS_TIME);
|
|
|
|
device_init_wakeup(&pdev->dev, 1);
|
|
return 0;
|
|
|
|
out_irq:
|
|
pm80x_free_irq(info->pm80x, info->irq, info);
|
|
out_reg:
|
|
input_free_device(info->idev);
|
|
out:
|
|
kfree(info);
|
|
return err;
|
|
}
|
|
|
|
static int pm80x_onkey_remove(struct platform_device *pdev)
|
|
{
|
|
struct pm80x_onkey_info *info = platform_get_drvdata(pdev);
|
|
|
|
pm80x_free_irq(info->pm80x, info->irq, info);
|
|
input_unregister_device(info->idev);
|
|
kfree(info);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver pm80x_onkey_driver = {
|
|
.driver = {
|
|
.name = "88pm80x-onkey",
|
|
.pm = &pm80x_onkey_pm_ops,
|
|
},
|
|
.probe = pm80x_onkey_probe,
|
|
.remove = pm80x_onkey_remove,
|
|
};
|
|
|
|
module_platform_driver(pm80x_onkey_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver");
|
|
MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>");
|
|
MODULE_ALIAS("platform:88pm80x-onkey");
|