Loading...
1// SPDX-License-Identifier: GPL-2.0-or-later
2/* NXP PCF50633 Input Driver
3 *
4 * (C) 2006-2008 by Openmoko, Inc.
5 * Author: Balaji Rao <balajirrao@openmoko.org>
6 * All rights reserved.
7 *
8 * Broken down from monstrous PCF50633 driver mainly by
9 * Harald Welte, Andy Green and Werner Almesberger
10 */
11
12#include <linux/kernel.h>
13#include <linux/module.h>
14#include <linux/device.h>
15#include <linux/platform_device.h>
16#include <linux/input.h>
17#include <linux/slab.h>
18
19#include <linux/mfd/pcf50633/core.h>
20
21#define PCF50633_OOCSTAT_ONKEY 0x01
22#define PCF50633_REG_OOCSTAT 0x12
23#define PCF50633_REG_OOCMODE 0x10
24
25struct pcf50633_input {
26 struct pcf50633 *pcf;
27 struct input_dev *input_dev;
28};
29
30static void
31pcf50633_input_irq(int irq, void *data)
32{
33 struct pcf50633_input *input;
34 int onkey_released;
35
36 input = data;
37
38 /* We report only one event depending on the key press status */
39 onkey_released = pcf50633_reg_read(input->pcf, PCF50633_REG_OOCSTAT)
40 & PCF50633_OOCSTAT_ONKEY;
41
42 if (irq == PCF50633_IRQ_ONKEYF && !onkey_released)
43 input_report_key(input->input_dev, KEY_POWER, 1);
44 else if (irq == PCF50633_IRQ_ONKEYR && onkey_released)
45 input_report_key(input->input_dev, KEY_POWER, 0);
46
47 input_sync(input->input_dev);
48}
49
50static int pcf50633_input_probe(struct platform_device *pdev)
51{
52 struct pcf50633_input *input;
53 struct input_dev *input_dev;
54 int ret;
55
56
57 input = kzalloc(sizeof(*input), GFP_KERNEL);
58 if (!input)
59 return -ENOMEM;
60
61 input_dev = input_allocate_device();
62 if (!input_dev) {
63 kfree(input);
64 return -ENOMEM;
65 }
66
67 platform_set_drvdata(pdev, input);
68 input->pcf = dev_to_pcf50633(pdev->dev.parent);
69 input->input_dev = input_dev;
70
71 input_dev->name = "PCF50633 PMU events";
72 input_dev->id.bustype = BUS_I2C;
73 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_PWR);
74 set_bit(KEY_POWER, input_dev->keybit);
75
76 ret = input_register_device(input_dev);
77 if (ret) {
78 input_free_device(input_dev);
79 kfree(input);
80 return ret;
81 }
82 pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYR,
83 pcf50633_input_irq, input);
84 pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYF,
85 pcf50633_input_irq, input);
86
87 return 0;
88}
89
90static void pcf50633_input_remove(struct platform_device *pdev)
91{
92 struct pcf50633_input *input = platform_get_drvdata(pdev);
93
94 pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYR);
95 pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYF);
96
97 input_unregister_device(input->input_dev);
98 kfree(input);
99}
100
101static struct platform_driver pcf50633_input_driver = {
102 .driver = {
103 .name = "pcf50633-input",
104 },
105 .probe = pcf50633_input_probe,
106 .remove_new = pcf50633_input_remove,
107};
108module_platform_driver(pcf50633_input_driver);
109
110MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
111MODULE_DESCRIPTION("PCF50633 input driver");
112MODULE_LICENSE("GPL");
113MODULE_ALIAS("platform:pcf50633-input");
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>
19#include <linux/init.h>
20#include <linux/device.h>
21#include <linux/platform_device.h>
22#include <linux/input.h>
23#include <linux/slab.h>
24
25#include <linux/mfd/pcf50633/core.h>
26
27#define PCF50633_OOCSTAT_ONKEY 0x01
28#define PCF50633_REG_OOCSTAT 0x12
29#define PCF50633_REG_OOCMODE 0x10
30
31struct pcf50633_input {
32 struct pcf50633 *pcf;
33 struct input_dev *input_dev;
34};
35
36static void
37pcf50633_input_irq(int irq, void *data)
38{
39 struct pcf50633_input *input;
40 int onkey_released;
41
42 input = data;
43
44 /* We report only one event depending on the key press status */
45 onkey_released = pcf50633_reg_read(input->pcf, PCF50633_REG_OOCSTAT)
46 & PCF50633_OOCSTAT_ONKEY;
47
48 if (irq == PCF50633_IRQ_ONKEYF && !onkey_released)
49 input_report_key(input->input_dev, KEY_POWER, 1);
50 else if (irq == PCF50633_IRQ_ONKEYR && onkey_released)
51 input_report_key(input->input_dev, KEY_POWER, 0);
52
53 input_sync(input->input_dev);
54}
55
56static int __devinit pcf50633_input_probe(struct platform_device *pdev)
57{
58 struct pcf50633_input *input;
59 struct input_dev *input_dev;
60 int ret;
61
62
63 input = kzalloc(sizeof(*input), GFP_KERNEL);
64 if (!input)
65 return -ENOMEM;
66
67 input_dev = input_allocate_device();
68 if (!input_dev) {
69 kfree(input);
70 return -ENOMEM;
71 }
72
73 platform_set_drvdata(pdev, input);
74 input->pcf = dev_to_pcf50633(pdev->dev.parent);
75 input->input_dev = input_dev;
76
77 input_dev->name = "PCF50633 PMU events";
78 input_dev->id.bustype = BUS_I2C;
79 input_dev->evbit[0] = BIT(EV_KEY) | BIT(EV_PWR);
80 set_bit(KEY_POWER, input_dev->keybit);
81
82 ret = input_register_device(input_dev);
83 if (ret) {
84 input_free_device(input_dev);
85 kfree(input);
86 return ret;
87 }
88 pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYR,
89 pcf50633_input_irq, input);
90 pcf50633_register_irq(input->pcf, PCF50633_IRQ_ONKEYF,
91 pcf50633_input_irq, input);
92
93 return 0;
94}
95
96static int __devexit pcf50633_input_remove(struct platform_device *pdev)
97{
98 struct pcf50633_input *input = platform_get_drvdata(pdev);
99
100 pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYR);
101 pcf50633_free_irq(input->pcf, PCF50633_IRQ_ONKEYF);
102
103 input_unregister_device(input->input_dev);
104 kfree(input);
105
106 return 0;
107}
108
109static struct platform_driver pcf50633_input_driver = {
110 .driver = {
111 .name = "pcf50633-input",
112 },
113 .probe = pcf50633_input_probe,
114 .remove = __devexit_p(pcf50633_input_remove),
115};
116
117static int __init pcf50633_input_init(void)
118{
119 return platform_driver_register(&pcf50633_input_driver);
120}
121module_init(pcf50633_input_init);
122
123static void __exit pcf50633_input_exit(void)
124{
125 platform_driver_unregister(&pcf50633_input_driver);
126}
127module_exit(pcf50633_input_exit);
128
129MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>");
130MODULE_DESCRIPTION("PCF50633 input driver");
131MODULE_LICENSE("GPL");
132MODULE_ALIAS("platform:pcf50633-input");