2 * 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver
4 * Copyright (C) 2009-2010 Marvell International Ltd.
5 * Haojian Zhuang <haojian.zhuang@marvell.com>
7 * This file is subject to the terms and conditions of the GNU General
8 * Public License. See the file "COPYING" in the main directory of this
9 * archive for more details.
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
16 * You should have received a copy of the GNU General Public License
17 * along with this program; if not, write to the Free Software
18 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 #include <linux/kernel.h>
22 #include <linux/module.h>
23 #include <linux/platform_device.h>
24 #include <linux/i2c.h>
25 #include <linux/input.h>
26 #include <linux/interrupt.h>
27 #include <linux/mfd/88pm860x.h>
28 #include <linux/slab.h>
30 #define PM8607_WAKEUP 0x0b
32 #define LONG_ONKEY_EN (1 << 1)
33 #define ONKEY_STATUS (1 << 0)
35 struct pm860x_onkey_info {
36 struct input_dev *idev;
37 struct pm860x_chip *chip;
38 struct i2c_client *i2c;
43 /* 88PM860x gives us an interrupt when ONKEY is held */
44 static irqreturn_t pm860x_onkey_handler(int irq, void *data)
46 struct pm860x_onkey_info *info = data;
49 ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
51 input_report_key(info->idev, KEY_POWER, ret);
52 input_sync(info->idev);
54 /* Enable 8-second long onkey detection */
55 pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
59 static int __devinit pm860x_onkey_probe(struct platform_device *pdev)
61 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
62 struct pm860x_onkey_info *info;
65 irq = platform_get_irq(pdev, 0);
67 dev_err(&pdev->dev, "No IRQ resource!\n");
71 info = kzalloc(sizeof(struct pm860x_onkey_info), GFP_KERNEL);
75 info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
76 info->dev = &pdev->dev;
77 info->irq = irq + chip->irq_base;
79 info->idev = input_allocate_device();
81 dev_err(chip->dev, "Failed to allocate input dev\n");
86 info->idev->name = "88pm860x_on";
87 info->idev->phys = "88pm860x_on/input0";
88 info->idev->id.bustype = BUS_I2C;
89 info->idev->dev.parent = &pdev->dev;
90 info->idev->evbit[0] = BIT_MASK(EV_KEY);
91 info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
93 ret = input_register_device(info->idev);
95 dev_err(chip->dev, "Can't register input device: %d\n", ret);
99 ret = request_threaded_irq(info->irq, NULL, pm860x_onkey_handler,
100 IRQF_ONESHOT, "onkey", info);
102 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
107 platform_set_drvdata(pdev, info);
111 input_unregister_device(info->idev);
116 input_free_device(info->idev);
122 static int __devexit pm860x_onkey_remove(struct platform_device *pdev)
124 struct pm860x_onkey_info *info = platform_get_drvdata(pdev);
126 free_irq(info->irq, info);
127 input_unregister_device(info->idev);
132 static struct platform_driver pm860x_onkey_driver = {
134 .name = "88pm860x-onkey",
135 .owner = THIS_MODULE,
137 .probe = pm860x_onkey_probe,
138 .remove = __devexit_p(pm860x_onkey_remove),
141 static int __init pm860x_onkey_init(void)
143 return platform_driver_register(&pm860x_onkey_driver);
145 module_init(pm860x_onkey_init);
147 static void __exit pm860x_onkey_exit(void)
149 platform_driver_unregister(&pm860x_onkey_driver);
151 module_exit(pm860x_onkey_exit);
153 MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver");
154 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
155 MODULE_LICENSE("GPL");