Loading...
1/**
2 * twl4030-pwrbutton.c - TWL4030 Power Button Input Driver
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * Written by Peter De Schrijver <peter.de-schrijver@nokia.com>
7 * Several fixes by Felipe Balbi <felipe.balbi@nokia.com>
8 *
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.
12 *
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.
17 *
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
21 */
22
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>
31
32#define PWR_PWRON_IRQ (1 << 0)
33
34#define STS_HW_CONDITIONS 0xf
35
36static irqreturn_t powerbutton_irq(int irq, void *_pwr)
37{
38 struct input_dev *pwr = _pwr;
39 int err;
40 u8 value;
41
42 err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &value,
43 STS_HW_CONDITIONS);
44 if (!err) {
45 input_report_key(pwr, KEY_POWER, value & PWR_PWRON_IRQ);
46 input_sync(pwr);
47 } else {
48 dev_err(pwr->dev.parent, "twl4030: i2c error %d while reading"
49 " TWL4030 PM_MASTER STS_HW_CONDITIONS register\n", err);
50 }
51
52 return IRQ_HANDLED;
53}
54
55static int __init twl4030_pwrbutton_probe(struct platform_device *pdev)
56{
57 struct input_dev *pwr;
58 int irq = platform_get_irq(pdev, 0);
59 int err;
60
61 pwr = input_allocate_device();
62 if (!pwr) {
63 dev_dbg(&pdev->dev, "Can't allocate power button\n");
64 return -ENOMEM;
65 }
66
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;
72
73 err = request_threaded_irq(irq, NULL, powerbutton_irq,
74 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
75 "twl4030_pwrbutton", pwr);
76 if (err < 0) {
77 dev_dbg(&pdev->dev, "Can't get IRQ for pwrbutton: %d\n", err);
78 goto free_input_dev;
79 }
80
81 err = input_register_device(pwr);
82 if (err) {
83 dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
84 goto free_irq;
85 }
86
87 platform_set_drvdata(pdev, pwr);
88
89 return 0;
90
91free_irq:
92 free_irq(irq, pwr);
93free_input_dev:
94 input_free_device(pwr);
95 return err;
96}
97
98static int __exit twl4030_pwrbutton_remove(struct platform_device *pdev)
99{
100 struct input_dev *pwr = platform_get_drvdata(pdev);
101 int irq = platform_get_irq(pdev, 0);
102
103 free_irq(irq, pwr);
104 input_unregister_device(pwr);
105
106 return 0;
107}
108
109static struct platform_driver twl4030_pwrbutton_driver = {
110 .remove = __exit_p(twl4030_pwrbutton_remove),
111 .driver = {
112 .name = "twl4030_pwrbutton",
113 .owner = THIS_MODULE,
114 },
115};
116
117static int __init twl4030_pwrbutton_init(void)
118{
119 return platform_driver_probe(&twl4030_pwrbutton_driver,
120 twl4030_pwrbutton_probe);
121}
122module_init(twl4030_pwrbutton_init);
123
124static void __exit twl4030_pwrbutton_exit(void)
125{
126 platform_driver_unregister(&twl4030_pwrbutton_driver);
127}
128module_exit(twl4030_pwrbutton_exit);
129
130MODULE_ALIAS("platform:twl4030_pwrbutton");
131MODULE_DESCRIPTION("Triton2 Power Button");
132MODULE_LICENSE("GPL");
133MODULE_AUTHOR("Peter De Schrijver <peter.de-schrijver@nokia.com>");
134MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
135
1/**
2 * twl4030-pwrbutton.c - TWL4030 Power Button Input Driver
3 *
4 * Copyright (C) 2008-2009 Nokia Corporation
5 *
6 * Written by Peter De Schrijver <peter.de-schrijver@nokia.com>
7 * Several fixes by Felipe Balbi <felipe.balbi@nokia.com>
8 *
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.
12 *
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.
17 *
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
21 */
22
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>
31
32#define PWR_PWRON_IRQ (1 << 0)
33
34#define STS_HW_CONDITIONS 0xf
35
36static irqreturn_t powerbutton_irq(int irq, void *_pwr)
37{
38 struct input_dev *pwr = _pwr;
39 int err;
40 u8 value;
41
42 err = twl_i2c_read_u8(TWL4030_MODULE_PM_MASTER, &value,
43 STS_HW_CONDITIONS);
44 if (!err) {
45 input_report_key(pwr, KEY_POWER, value & PWR_PWRON_IRQ);
46 input_sync(pwr);
47 } else {
48 dev_err(pwr->dev.parent, "twl4030: i2c error %d while reading"
49 " TWL4030 PM_MASTER STS_HW_CONDITIONS register\n", err);
50 }
51
52 return IRQ_HANDLED;
53}
54
55static int __init twl4030_pwrbutton_probe(struct platform_device *pdev)
56{
57 struct input_dev *pwr;
58 int irq = platform_get_irq(pdev, 0);
59 int err;
60
61 pwr = input_allocate_device();
62 if (!pwr) {
63 dev_dbg(&pdev->dev, "Can't allocate power button\n");
64 return -ENOMEM;
65 }
66
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;
72
73 err = request_threaded_irq(irq, NULL, powerbutton_irq,
74 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING,
75 "twl4030_pwrbutton", pwr);
76 if (err < 0) {
77 dev_dbg(&pdev->dev, "Can't get IRQ for pwrbutton: %d\n", err);
78 goto free_input_dev;
79 }
80
81 err = input_register_device(pwr);
82 if (err) {
83 dev_dbg(&pdev->dev, "Can't register power button: %d\n", err);
84 goto free_irq;
85 }
86
87 platform_set_drvdata(pdev, pwr);
88
89 return 0;
90
91free_irq:
92 free_irq(irq, pwr);
93free_input_dev:
94 input_free_device(pwr);
95 return err;
96}
97
98static int __exit twl4030_pwrbutton_remove(struct platform_device *pdev)
99{
100 struct input_dev *pwr = platform_get_drvdata(pdev);
101 int irq = platform_get_irq(pdev, 0);
102
103 free_irq(irq, pwr);
104 input_unregister_device(pwr);
105
106 return 0;
107}
108
109static struct platform_driver twl4030_pwrbutton_driver = {
110 .remove = __exit_p(twl4030_pwrbutton_remove),
111 .driver = {
112 .name = "twl4030_pwrbutton",
113 .owner = THIS_MODULE,
114 },
115};
116
117static int __init twl4030_pwrbutton_init(void)
118{
119 return platform_driver_probe(&twl4030_pwrbutton_driver,
120 twl4030_pwrbutton_probe);
121}
122module_init(twl4030_pwrbutton_init);
123
124static void __exit twl4030_pwrbutton_exit(void)
125{
126 platform_driver_unregister(&twl4030_pwrbutton_driver);
127}
128module_exit(twl4030_pwrbutton_exit);
129
130MODULE_ALIAS("platform:twl4030_pwrbutton");
131MODULE_DESCRIPTION("Triton2 Power Button");
132MODULE_LICENSE("GPL");
133MODULE_AUTHOR("Peter De Schrijver <peter.de-schrijver@nokia.com>");
134MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
135