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77686517 SI |
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 | ||
7b961d5b | 10 | #include <linux/device.h> |
77686517 SI |
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> | |
ee66e653 | 16 | #include <linux/mfd/abx500/ab8500.h> |
03ecd229 | 17 | #include <linux/of.h> |
77686517 SI |
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 | ||
5298cc4c | 49 | static int ab8500_ponkey_probe(struct platform_device *pdev) |
77686517 SI |
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 | ||
7b961d5b HS |
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; | |
77686517 SI |
77 | |
78 | ponkey->idev = input; | |
79 | ponkey->ab8500 = ab8500; | |
527df5fa DT |
80 | ponkey->irq_dbf = irq_dbf; |
81 | ponkey->irq_dbr = irq_dbr; | |
77686517 SI |
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 | ||
7b961d5b HS |
88 | error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbf, |
89 | ab8500_ponkey_handler, 0, | |
90 | "ab8500-ponkey-dbf", ponkey); | |
77686517 SI |
91 | if (error < 0) { |
92 | dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n", | |
93 | ponkey->irq_dbf, error); | |
7b961d5b | 94 | return error; |
77686517 SI |
95 | } |
96 | ||
7b961d5b HS |
97 | error = devm_request_any_context_irq(&pdev->dev, ponkey->irq_dbr, |
98 | ab8500_ponkey_handler, 0, | |
99 | "ab8500-ponkey-dbr", ponkey); | |
77686517 SI |
100 | if (error < 0) { |
101 | dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n", | |
102 | ponkey->irq_dbr, error); | |
7b961d5b | 103 | return error; |
77686517 SI |
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); | |
7b961d5b | 109 | return error; |
77686517 SI |
110 | } |
111 | ||
112 | platform_set_drvdata(pdev, ponkey); | |
113 | return 0; | |
77686517 SI |
114 | } |
115 | ||
03ecd229 LJ |
116 | #ifdef CONFIG_OF |
117 | static const struct of_device_id ab8500_ponkey_match[] = { | |
118 | { .compatible = "stericsson,ab8500-ponkey", }, | |
119 | {} | |
120 | }; | |
121 | #endif | |
122 | ||
77686517 SI |
123 | static struct platform_driver ab8500_ponkey_driver = { |
124 | .driver = { | |
125 | .name = "ab8500-poweron-key", | |
03ecd229 | 126 | .of_match_table = of_match_ptr(ab8500_ponkey_match), |
77686517 SI |
127 | }, |
128 | .probe = ab8500_ponkey_probe, | |
77686517 | 129 | }; |
840a746b | 130 | module_platform_driver(ab8500_ponkey_driver); |
77686517 SI |
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"); |