2 * twl4030-pwrbutton.c - TWL4030 Power Button Input Driver
4 * Copyright (C) 2008-2009 Nokia Corporation
6 * Written by Peter De Schrijver <peter.de-schrijver@nokia.com>
7 * Several fixes by Felipe Balbi <felipe.balbi@nokia.com>
9 * This file is subject to the terms and conditions of the GNU General
10 * Public License. See the file "COPYING" in the main directory of this
11 * archive for more details.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
23 #include <linux/module.h>
24 #include <linux/init.h>
25 #include <linux/kernel.h>
26 #include <linux/errno.h>
27 #include <linux/input.h>
28 #include <linux/interrupt.h>
29 #include <linux/platform_device.h>
30 #include <linux/i2c/twl.h>
32 #define PWR_PWRON_IRQ (1 << 0)
34 #define STS_HW_CONDITIONS 0xf
36 static irqreturn_t
powerbutton_irq(int irq
, void *_pwr
)
38 struct input_dev
*pwr
= _pwr
;
42 err
= twl_i2c_read_u8(TWL_MODULE_PM_MASTER
, &value
, STS_HW_CONDITIONS
);
44 pm_wakeup_event(pwr
->dev
.parent
, 0);
45 input_report_key(pwr
, KEY_POWER
, value
& PWR_PWRON_IRQ
);
48 dev_err(pwr
->dev
.parent
, "twl4030: i2c error %d while reading"
49 " TWL4030 PM_MASTER STS_HW_CONDITIONS register\n", err
);
55 static int __init
twl4030_pwrbutton_probe(struct platform_device
*pdev
)
57 struct input_dev
*pwr
;
58 int irq
= platform_get_irq(pdev
, 0);
61 pwr
= input_allocate_device();
63 dev_dbg(&pdev
->dev
, "Can't allocate power button\n");
67 pwr
->evbit
[0] = BIT_MASK(EV_KEY
);
68 pwr
->keybit
[BIT_WORD(KEY_POWER
)] = BIT_MASK(KEY_POWER
);
69 pwr
->name
= "twl4030_pwrbutton";
70 pwr
->phys
= "twl4030_pwrbutton/input0";
71 pwr
->dev
.parent
= &pdev
->dev
;
73 err
= request_threaded_irq(irq
, NULL
, powerbutton_irq
,
74 IRQF_TRIGGER_FALLING
| IRQF_TRIGGER_RISING
,
75 "twl4030_pwrbutton", pwr
);
77 dev_dbg(&pdev
->dev
, "Can't get IRQ for pwrbutton: %d\n", err
);
81 err
= input_register_device(pwr
);
83 dev_dbg(&pdev
->dev
, "Can't register power button: %d\n", err
);
87 platform_set_drvdata(pdev
, pwr
);
94 input_free_device(pwr
);
98 static int __exit
twl4030_pwrbutton_remove(struct platform_device
*pdev
)
100 struct input_dev
*pwr
= platform_get_drvdata(pdev
);
101 int irq
= platform_get_irq(pdev
, 0);
104 input_unregister_device(pwr
);
109 static struct platform_driver twl4030_pwrbutton_driver
= {
110 .remove
= __exit_p(twl4030_pwrbutton_remove
),
112 .name
= "twl4030_pwrbutton",
113 .owner
= THIS_MODULE
,
117 module_platform_driver_probe(twl4030_pwrbutton_driver
,
118 twl4030_pwrbutton_probe
);
120 MODULE_ALIAS("platform:twl4030_pwrbutton");
121 MODULE_DESCRIPTION("Triton2 Power Button");
122 MODULE_LICENSE("GPL");
123 MODULE_AUTHOR("Peter De Schrijver <peter.de-schrijver@nokia.com>");
124 MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");