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
|
/*
* Retu power button driver.
*
* Copyright (C) 2004-2010 Nokia Corporation
*
* Original code written by Ari Saastamoinen, Juha Yrjölä and Felipe Balbi.
* Rewritten by Aaro Koskinen.
*
* 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.
*/
#include <linux/irq.h>
#include <linux/slab.h>
#include <linux/errno.h>
#include <linux/input.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mfd/retu.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#define RETU_STATUS_PWRONX (1 << 5)
static irqreturn_t retu_pwrbutton_irq(int irq, void *_pwr)
{
struct input_dev *idev = _pwr;
struct retu_dev *rdev = input_get_drvdata(idev);
bool state;
state = !(retu_read(rdev, RETU_REG_STATUS) & RETU_STATUS_PWRONX);
input_report_key(idev, KEY_POWER, state);
input_sync(idev);
return IRQ_HANDLED;
}
static int retu_pwrbutton_probe(struct platform_device *pdev)
{
struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent);
struct input_dev *idev;
int irq;
int error;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
idev = devm_input_allocate_device(&pdev->dev);
if (!idev)
return -ENOMEM;
idev->name = "retu-pwrbutton";
idev->dev.parent = &pdev->dev;
input_set_capability(idev, EV_KEY, KEY_POWER);
input_set_drvdata(idev, rdev);
error = devm_request_threaded_irq(&pdev->dev, irq,
NULL, retu_pwrbutton_irq,
IRQF_ONESHOT,
"retu-pwrbutton", idev);
if (error)
return error;
error = input_register_device(idev);
if (error)
return error;
return 0;
}
static struct platform_driver retu_pwrbutton_driver = {
.probe = retu_pwrbutton_probe,
.driver = {
.name = "retu-pwrbutton",
},
};
module_platform_driver(retu_pwrbutton_driver);
MODULE_ALIAS("platform:retu-pwrbutton");
MODULE_DESCRIPTION("Retu Power Button");
MODULE_AUTHOR("Ari Saastamoinen");
MODULE_AUTHOR("Felipe Balbi");
MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
MODULE_LICENSE("GPL");
|
