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68d8bf04 FB |
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> | |
b07682b6 | 30 | #include <linux/i2c/twl.h> |
68d8bf04 FB |
31 | |
32 | #define PWR_PWRON_IRQ (1 << 0) | |
33 | ||
34 | #define STS_HW_CONDITIONS 0xf | |
35 | ||
36 | static irqreturn_t powerbutton_irq(int irq, void *_pwr) | |
37 | { | |
38 | struct input_dev *pwr = _pwr; | |
39 | int err; | |
40 | u8 value; | |
41 | ||
f3219817 | 42 | err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &value, STS_HW_CONDITIONS); |
68d8bf04 | 43 | if (!err) { |
112b51cf | 44 | pm_wakeup_event(pwr->dev.parent, 0); |
68d8bf04 FB |
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 | ||
c81e5926 | 55 | static int twl4030_pwrbutton_probe(struct platform_device *pdev) |
68d8bf04 FB |
56 | { |
57 | struct input_dev *pwr; | |
58 | int irq = platform_get_irq(pdev, 0); | |
59 | int err; | |
60 | ||
7f9ce649 | 61 | pwr = devm_input_allocate_device(&pdev->dev); |
68d8bf04 | 62 | if (!pwr) { |
0330f93a | 63 | dev_err(&pdev->dev, "Can't allocate power button\n"); |
68d8bf04 FB |
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 | ||
7f9ce649 | 73 | err = devm_request_threaded_irq(&pwr->dev, irq, NULL, powerbutton_irq, |
5f4eedef FE |
74 | IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | |
75 | IRQF_ONESHOT, | |
68d8bf04 FB |
76 | "twl4030_pwrbutton", pwr); |
77 | if (err < 0) { | |
0330f93a | 78 | dev_err(&pdev->dev, "Can't get IRQ for pwrbutton: %d\n", err); |
7f9ce649 | 79 | return err; |
68d8bf04 FB |
80 | } |
81 | ||
82 | err = input_register_device(pwr); | |
83 | if (err) { | |
0330f93a | 84 | dev_err(&pdev->dev, "Can't register power button: %d\n", err); |
7f9ce649 | 85 | return err; |
68d8bf04 FB |
86 | } |
87 | ||
88 | platform_set_drvdata(pdev, pwr); | |
c42bfd7f | 89 | device_init_wakeup(&pdev->dev, true); |
68d8bf04 | 90 | |
68d8bf04 FB |
91 | return 0; |
92 | } | |
93 | ||
c81e5926 SR |
94 | #ifdef CONFIG_OF |
95 | static const struct of_device_id twl4030_pwrbutton_dt_match_table[] = { | |
96 | { .compatible = "ti,twl4030-pwrbutton" }, | |
97 | {}, | |
98 | }; | |
99 | MODULE_DEVICE_TABLE(of, twl4030_pwrbutton_dt_match_table); | |
100 | #endif | |
101 | ||
dda7b73c | 102 | static struct platform_driver twl4030_pwrbutton_driver = { |
c81e5926 | 103 | .probe = twl4030_pwrbutton_probe, |
68d8bf04 FB |
104 | .driver = { |
105 | .name = "twl4030_pwrbutton", | |
c81e5926 | 106 | .of_match_table = of_match_ptr(twl4030_pwrbutton_dt_match_table), |
68d8bf04 FB |
107 | }, |
108 | }; | |
c81e5926 | 109 | module_platform_driver(twl4030_pwrbutton_driver); |
68d8bf04 FB |
110 | |
111 | MODULE_ALIAS("platform:twl4030_pwrbutton"); | |
112 | MODULE_DESCRIPTION("Triton2 Power Button"); | |
113 | MODULE_LICENSE("GPL"); | |
114 | MODULE_AUTHOR("Peter De Schrijver <peter.de-schrijver@nokia.com>"); | |
115 | MODULE_AUTHOR("Felipe Balbi <felipe.balbi@nokia.com>"); | |
116 |