Warning: That file was not part of the compilation database. It may have many parsing errors.
1 | /* |
---|---|
2 | * Copyright (C) ST-Ericsson SA 2010 |
3 | * |
4 | * License Terms: GNU General Public License v2 |
5 | * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson |
6 | * |
7 | * AB8500 Power-On Key handler |
8 | */ |
9 | |
10 | #include <linux/device.h> |
11 | #include <linux/kernel.h> |
12 | #include <linux/module.h> |
13 | #include <linux/platform_device.h> |
14 | #include <linux/input.h> |
15 | #include <linux/interrupt.h> |
16 | #include <linux/mfd/abx500/ab8500.h> |
17 | #include <linux/of.h> |
18 | #include <linux/slab.h> |
19 | |
20 | /** |
21 | * struct ab8500_ponkey - ab8500 ponkey information |
22 | * @input_dev: pointer to input device |
23 | * @ab8500: ab8500 parent |
24 | * @irq_dbf: irq number for falling transition |
25 | * @irq_dbr: irq number for rising transition |
26 | */ |
27 | struct ab8500_ponkey { |
28 | struct input_dev *idev; |
29 | struct ab8500 *ab8500; |
30 | int irq_dbf; |
31 | int irq_dbr; |
32 | }; |
33 | |
34 | /* AB8500 gives us an interrupt when ONKEY is held */ |
35 | static irqreturn_t ab8500_ponkey_handler(int irq, void *data) |
36 | { |
37 | struct ab8500_ponkey *ponkey = data; |
38 | |
39 | if (irq == ponkey->irq_dbf) |
40 | input_report_key(ponkey->idev, KEY_POWER, true); |
41 | else if (irq == ponkey->irq_dbr) |
42 | input_report_key(ponkey->idev, KEY_POWER, false); |
43 | |
44 | input_sync(ponkey->idev); |
45 | |
46 | return IRQ_HANDLED; |
47 | } |
48 | |
49 | static int ab8500_ponkey_probe(struct platform_device *pdev) |
50 | { |
51 | struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent); |
52 | struct ab8500_ponkey *ponkey; |
53 | struct input_dev *input; |
54 | int irq_dbf, irq_dbr; |
55 | int error; |
56 | |
57 | irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF"); |
58 | if (irq_dbf < 0) { |
59 | dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf); |
60 | return irq_dbf; |
61 | } |
62 | |
63 | irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR"); |
64 | if (irq_dbr < 0) { |
65 | dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr); |
66 | return irq_dbr; |
67 | } |
68 | |
69 | ponkey = devm_kzalloc(&pdev->dev, sizeof(struct ab8500_ponkey), |
70 | GFP_KERNEL); |
71 | if (!ponkey) |
72 | return -ENOMEM; |
73 | |
74 | input = devm_input_allocate_device(&pdev->dev); |
75 | if (!input) |
76 | return -ENOMEM; |
77 | |
78 | ponkey->idev = input; |
79 | ponkey->ab8500 = ab8500; |
80 | ponkey->irq_dbf = irq_dbf; |
81 | ponkey->irq_dbr = irq_dbr; |
82 | |
83 | input->name = "AB8500 POn(PowerOn) Key"; |
84 | input->dev.parent = &pdev->dev; |
85 | |
86 | input_set_capability(input, EV_KEY, KEY_POWER); |
87 | |
88 | error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbf, |
89 | ab8500_ponkey_handler, 0, |
90 | "ab8500-ponkey-dbf", ponkey); |
91 | if (error < 0) { |
92 | dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n", |
93 | ponkey->irq_dbf, error); |
94 | return error; |
95 | } |
96 | |
97 | error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbr, |
98 | ab8500_ponkey_handler, 0, |
99 | "ab8500-ponkey-dbr", ponkey); |
100 | if (error < 0) { |
101 | dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n", |
102 | ponkey->irq_dbr, error); |
103 | return error; |
104 | } |
105 | |
106 | error = input_register_device(ponkey->idev); |
107 | if (error) { |
108 | dev_err(ab8500->dev, "Can't register input device: %d\n", error); |
109 | return error; |
110 | } |
111 | |
112 | return 0; |
113 | } |
114 | |
115 | #ifdef CONFIG_OF |
116 | static const struct of_device_id ab8500_ponkey_match[] = { |
117 | { .compatible = "stericsson,ab8500-ponkey", }, |
118 | {} |
119 | }; |
120 | MODULE_DEVICE_TABLE(of, ab8500_ponkey_match); |
121 | #endif |
122 | |
123 | static struct platform_driver ab8500_ponkey_driver = { |
124 | .driver = { |
125 | .name = "ab8500-poweron-key", |
126 | .of_match_table = of_match_ptr(ab8500_ponkey_match), |
127 | }, |
128 | .probe = ab8500_ponkey_probe, |
129 | }; |
130 | module_platform_driver(ab8500_ponkey_driver); |
131 | |
132 | MODULE_LICENSE("GPL v2"); |
133 | MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>"); |
134 | MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver"); |
135 |
Warning: That file was not part of the compilation database. It may have many parsing errors.