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1851b06a BR |
1 | /* NXP PCF50633 Input Driver |
2 | * | |
3 | * (C) 2006-2008 by Openmoko, Inc. | |
4 | * Author: Balaji Rao <balajirrao@openmoko.org> | |
5 | * All rights reserved. | |
6 | * | |
7 | * Broken down from monstrous PCF50633 driver mainly by | |
8 | * Harald Welte, Andy Green and Werner Almesberger | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify it | |
11 | * under the terms of the GNU General Public License as published by the | |
12 | * Free Software Foundation; either version 2 of the License, or (at your | |
13 | * option) any later version. | |
14 | * | |
15 | */ | |
16 | ||
17 | #include <linux/kernel.h> | |
18 | #include <linux/module.h> | |
1851b06a BR |
19 | #include <linux/device.h> |
20 | #include <linux/platform_device.h> | |
21 | #include <linux/input.h> | |
5a0e3ad6 | 22 | #include <linux/slab.h> |
1851b06a BR |
23 | |
24 | #include <linux/mfd/pcf50633/core.h> | |
25 | ||
26 | #define PCF50633_OOCSTAT_ONKEY 0x01 | |
27 | #define PCF50633_REG_OOCSTAT 0x12 | |
28 | #define PCF50633_REG_OOCMODE 0x10 | |
29 | ||
30 | struct pcf50633_input { | |
31 | struct pcf50633 *pcf; | |
32 | struct input_dev *input_dev; | |
33 | }; | |
34 | ||
35 | static void | |
36 | pcf50633_input_irq(int irq, void *data) | |
37 | { | |
38 | struct pcf50633_input *input; | |
39 | int onkey_released; | |
40 | ||
41 | input = data; | |
42 | ||
43 | /* We report only one event depending on the key press status */ | |
44 | onkey_released = pcf50633_reg_read(input->pcf, PCF50633_REG_OOCSTAT) | |
45 | & PCF50633_OOCSTAT_ONKEY; | |
46 | ||
47 | if (irq == PCF50633_IRQ_ONKEYF && !onkey_released) | |
48 | input_report_key(input->input_dev, KEY_POWER, 1); | |
49 | else if (irq == PCF50633_IRQ_ONKEYR && onkey_released) | |
50 | input_report_key(input->input_dev, KEY_POWER, 0); | |
51 | ||
52 | input_sync(input->input_dev); | |
53 | } | |
54 | ||
5298cc4c | 55 | static int pcf50633_input_probe(struct platform_device *pdev) |
1851b06a BR |
56 | { |
57 | struct pcf50633_input *input; | |
1851b06a BR |
58 | struct input_dev *input_dev; |
59 | int ret; | |
60 | ||
61 | ||
62 | input = kzalloc(sizeof(*input), GFP_KERNEL); | |
63 | if (!input) | |
64 | return -ENOMEM; | |
65 | ||
66 | input_dev = input_allocate_device(); | |
67 | if (!input_dev) { | |
68 | kfree(input); | |
69 | return -ENOMEM; | |
70 | } | |
71 | ||
72 | platform_set_drvdata(pdev, input); | |
68d641ef | 73 | input->pcf = dev_to_pcf50633(pdev->dev.parent); |
1851b06a BR |
74 | input->input_dev = input_dev; |
75 | ||
76 | input_dev->name = "PCF50633 PMU events"; | |
77 | input_dev->id.bustype = BUS_I2C; | |
78 | input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_PWR); | |
79 | set_bit(KEY_POWER, input_dev->keybit); | |
80 | ||
81 | ret = input_register_device(input_dev); | |
82 | if (ret) { | |
83 | input_free_device(input_dev); | |
84 | kfree(input); | |
85 | return ret; | |
86 | } | |
68d641ef | 87 | pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYR, |
1851b06a | 88 | pcf50633_input_irq, input); |
68d641ef | 89 | pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYF, |
1851b06a BR |
90 | pcf50633_input_irq, input); |
91 | ||
92 | return 0; | |
93 | } | |
94 | ||
e2619cf7 | 95 | static int pcf50633_input_remove(struct platform_device *pdev) |
1851b06a BR |
96 | { |
97 | struct pcf50633_input *input = platform_get_drvdata(pdev); | |
98 | ||
99 | pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYR); | |
100 | pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYF); | |
101 | ||
102 | input_unregister_device(input->input_dev); | |
103 | kfree(input); | |
104 | ||
105 | return 0; | |
106 | } | |
107 | ||
108 | static struct platform_driver pcf50633_input_driver = { | |
109 | .driver = { | |
110 | .name = "pcf50633-input", | |
111 | }, | |
112 | .probe = pcf50633_input_probe, | |
1cb0aa88 | 113 | .remove = pcf50633_input_remove, |
1851b06a | 114 | }; |
840a746b | 115 | module_platform_driver(pcf50633_input_driver); |
1851b06a BR |
116 | |
117 | MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); | |
118 | MODULE_DESCRIPTION("PCF50633 input driver"); | |
119 | MODULE_LICENSE("GPL"); | |
120 | MODULE_ALIAS("platform:pcf50633-input"); |