1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
|
/*
* 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 = 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");
|
