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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/of.h>
30#include <linux/platform_device.h>
31#include <linux/mfd/twl.h>
32
33#define PWR_PWRON_IRQ (1 << 0)
34
35#define STS_HW_CONDITIONS 0xf
36
37static irqreturn_t powerbutton_irq(int irq, void *_pwr)
38{
39 struct input_dev *pwr = _pwr;
40 int err;
41 u8 value;
42
43 err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &value, STS_HW_CONDITIONS);
44 if (!err) {
45 pm_wakeup_event(pwr->dev.parent, 0);
46 input_report_key(pwr, KEY_POWER, value & PWR_PWRON_IRQ);
47 input_sync(pwr);
48 } else {
49 dev_err(pwr->dev.parent, "twl4030: i2c error %d while reading"
50 " TWL4030 PM_MASTER STS_HW_CONDITIONS register\n", err);
51 }
52
53 return IRQ_HANDLED;
54}
55
56static int twl4030_pwrbutton_probe(struct platform_device *pdev)
57{
58 struct input_dev *pwr;
59 int irq = platform_get_irq(pdev, 0);
60 int err;
61
62 pwr = devm_input_allocate_device(&pdev->dev);
63 if (!pwr) {
64 dev_err(&pdev->dev, "Can't allocate power button\n");
65 return -ENOMEM;
66 }
67
68 input_set_capability(pwr, EV_KEY, KEY_POWER);
69 pwr->name = "twl4030_pwrbutton";
70 pwr->phys = "twl4030_pwrbutton/input0";
71 pwr->dev.parent = &pdev->dev;
72
73 err = devm_request_threaded_irq(&pdev->dev, irq, NULL, powerbutton_irq,
74 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
75 IRQF_ONESHOT,
76 "twl4030_pwrbutton", pwr);
77 if (err < 0) {
78 dev_err(&pdev->dev, "Can't get IRQ for pwrbutton: %d\n", err);
79 return err;
80 }
81
82 err = input_register_device(pwr);
83 if (err) {
84 dev_err(&pdev->dev, "Can't register power button: %d\n", err);
85 return err;
86 }
87
88 device_init_wakeup(&pdev->dev, true);
89
90 return 0;
91}
92
93#ifdef CONFIG_OF
94static const struct of_device_id twl4030_pwrbutton_dt_match_table[] = {
95 { .compatible = "ti,twl4030-pwrbutton" },
96 {},
97};
98MODULE_DEVICE_TABLE(of, twl4030_pwrbutton_dt_match_table);
99#endif
100
101static struct platform_driver twl4030_pwrbutton_driver = {
102 .probe = twl4030_pwrbutton_probe,
103 .driver = {
104 .name = "twl4030_pwrbutton",
105 .of_match_table = of_match_ptr(twl4030_pwrbutton_dt_match_table),
106 },
107};
108module_platform_driver(twl4030_pwrbutton_driver);
109
110MODULE_ALIAS("platform:twl4030_pwrbutton");
111MODULE_DESCRIPTION("Triton2 Power Button");
112MODULE_LICENSE("GPL");
113MODULE_AUTHOR("Peter De Schrijver <peter.de-schrijver@nokia.com>");
114MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
115
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(TWL_MODULE_PM_MASTER, &value, STS_HW_CONDITIONS);
43 if (!err) {
44 pm_wakeup_event(pwr->dev.parent, 0);
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 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 = devm_input_allocate_device(&pdev->dev);
62 if (!pwr) {
63 dev_err(&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 = devm_request_threaded_irq(&pwr->dev, irq, NULL, powerbutton_irq,
74 IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING |
75 IRQF_ONESHOT,
76 "twl4030_pwrbutton", pwr);
77 if (err < 0) {
78 dev_err(&pdev->dev, "Can't get IRQ for pwrbutton: %d\n", err);
79 return err;
80 }
81
82 err = input_register_device(pwr);
83 if (err) {
84 dev_err(&pdev->dev, "Can't register power button: %d\n", err);
85 return err;
86 }
87
88 platform_set_drvdata(pdev, pwr);
89 device_init_wakeup(&pdev->dev, true);
90
91 return 0;
92}
93
94#ifdef CONFIG_OF
95static const struct of_device_id twl4030_pwrbutton_dt_match_table[] = {
96 { .compatible = "ti,twl4030-pwrbutton" },
97 {},
98};
99MODULE_DEVICE_TABLE(of, twl4030_pwrbutton_dt_match_table);
100#endif
101
102static struct platform_driver twl4030_pwrbutton_driver = {
103 .probe = twl4030_pwrbutton_probe,
104 .driver = {
105 .name = "twl4030_pwrbutton",
106 .of_match_table = of_match_ptr(twl4030_pwrbutton_dt_match_table),
107 },
108};
109module_platform_driver(twl4030_pwrbutton_driver);
110
111MODULE_ALIAS("platform:twl4030_pwrbutton");
112MODULE_DESCRIPTION("Triton2 Power Button");
113MODULE_LICENSE("GPL");
114MODULE_AUTHOR("Peter De Schrijver <peter.de-schrijver@nokia.com>");
115MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>");
116