1
2
3
4
5
6
7
8
9
10#include <linux/kernel.h>
11#include <linux/module.h>
12#include <linux/platform_device.h>
13#include <linux/input.h>
14#include <linux/interrupt.h>
15#include <linux/mfd/ab8500.h>
16#include <linux/slab.h>
17
18
19
20
21
22
23
24
25struct ab8500_ponkey {
26 struct input_dev *idev;
27 struct ab8500 *ab8500;
28 int irq_dbf;
29 int irq_dbr;
30};
31
32
33static irqreturn_t ab8500_ponkey_handler(int irq, void *data)
34{
35 struct ab8500_ponkey *ponkey = data;
36
37 if (irq == ponkey->irq_dbf)
38 input_report_key(ponkey->idev, KEY_POWER, true);
39 else if (irq == ponkey->irq_dbr)
40 input_report_key(ponkey->idev, KEY_POWER, false);
41
42 input_sync(ponkey->idev);
43
44 return IRQ_HANDLED;
45}
46
47static int __devinit ab8500_ponkey_probe(struct platform_device *pdev)
48{
49 struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
50 struct ab8500_ponkey *ponkey;
51 struct input_dev *input;
52 int irq_dbf, irq_dbr;
53 int error;
54
55 irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF");
56 if (irq_dbf < 0) {
57 dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
58 return irq_dbf;
59 }
60
61 irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
62 if (irq_dbr < 0) {
63 dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
64 return irq_dbr;
65 }
66
67 ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
68 input = input_allocate_device();
69 if (!ponkey || !input) {
70 error = -ENOMEM;
71 goto err_free_mem;
72 }
73
74 ponkey->idev = input;
75 ponkey->ab8500 = ab8500;
76 ponkey->irq_dbf = irq_dbf;
77 ponkey->irq_dbr = irq_dbr;
78
79 input->name = "AB8500 POn(PowerOn) Key";
80 input->dev.parent = &pdev->dev;
81
82 input_set_capability(input, EV_KEY, KEY_POWER);
83
84 error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler,
85 0, "ab8500-ponkey-dbf", ponkey);
86 if (error < 0) {
87 dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
88 ponkey->irq_dbf, error);
89 goto err_free_mem;
90 }
91
92 error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler,
93 0, "ab8500-ponkey-dbr", ponkey);
94 if (error < 0) {
95 dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
96 ponkey->irq_dbr, error);
97 goto err_free_dbf_irq;
98 }
99
100 error = input_register_device(ponkey->idev);
101 if (error) {
102 dev_err(ab8500->dev, "Can't register input device: %d\n", error);
103 goto err_free_dbr_irq;
104 }
105
106 platform_set_drvdata(pdev, ponkey);
107 return 0;
108
109err_free_dbr_irq:
110 free_irq(ponkey->irq_dbr, ponkey);
111err_free_dbf_irq:
112 free_irq(ponkey->irq_dbf, ponkey);
113err_free_mem:
114 input_free_device(input);
115 kfree(ponkey);
116
117 return error;
118}
119
120static int __devexit ab8500_ponkey_remove(struct platform_device *pdev)
121{
122 struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);
123
124 free_irq(ponkey->irq_dbf, ponkey);
125 free_irq(ponkey->irq_dbr, ponkey);
126 input_unregister_device(ponkey->idev);
127 kfree(ponkey);
128
129 platform_set_drvdata(pdev, NULL);
130
131 return 0;
132}
133
134static struct platform_driver ab8500_ponkey_driver = {
135 .driver = {
136 .name = "ab8500-poweron-key",
137 .owner = THIS_MODULE,
138 },
139 .probe = ab8500_ponkey_probe,
140 .remove = __devexit_p(ab8500_ponkey_remove),
141};
142
143static int __init ab8500_ponkey_init(void)
144{
145 return platform_driver_register(&ab8500_ponkey_driver);
146}
147module_init(ab8500_ponkey_init);
148
149static void __exit ab8500_ponkey_exit(void)
150{
151 platform_driver_unregister(&ab8500_ponkey_driver);
152}
153module_exit(ab8500_ponkey_exit);
154
155MODULE_LICENSE("GPL v2");
156MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
157MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");
158
