2 * Copyright (C) ST-Ericsson SA 2010
4 * License Terms: GNU General Public License v2
5 * Author: Sundar Iyer <sundar.iyer@stericsson.com> for ST-Ericsson
7 * AB8500 Power-On Key handler
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>
19 * struct ab8500_ponkey - ab8500 ponkey information
20 * @input_dev: pointer to input device
21 * @ab8500: ab8500 parent
22 * @irq_dbf: irq number for falling transition
23 * @irq_dbr: irq number for rising transition
25 struct ab8500_ponkey {
26 struct input_dev *idev;
27 struct ab8500 *ab8500;
32 /* AB8500 gives us an interrupt when ONKEY is held */
33 static irqreturn_t ab8500_ponkey_handler(int irq, void *data)
35 struct ab8500_ponkey *ponkey = data;
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);
42 input_sync(ponkey->idev);
47 static int __devinit ab8500_ponkey_probe(struct platform_device *pdev)
49 struct ab8500 *ab8500 = dev_get_drvdata(pdev->dev.parent);
50 struct ab8500_ponkey *ponkey;
51 struct input_dev *input;
55 irq_dbf = platform_get_irq_byname(pdev, "ONKEY_DBF");
57 dev_err(&pdev->dev, "No IRQ for ONKEY_DBF, error=%d\n", irq_dbf);
61 irq_dbr = platform_get_irq_byname(pdev, "ONKEY_DBR");
63 dev_err(&pdev->dev, "No IRQ for ONKEY_DBR, error=%d\n", irq_dbr);
67 ponkey = kzalloc(sizeof(struct ab8500_ponkey), GFP_KERNEL);
68 input = input_allocate_device();
69 if (!ponkey || !input) {
75 ponkey->ab8500 = ab8500;
76 ponkey->irq_dbf = irq_dbf;
77 ponkey->irq_dbr = irq_dbr;
79 input->name = "AB8500 POn(PowerOn) Key";
80 input->dev.parent = &pdev->dev;
82 input_set_capability(input, EV_KEY, KEY_POWER);
84 error = request_any_context_irq(ponkey->irq_dbf, ab8500_ponkey_handler,
85 0, "ab8500-ponkey-dbf", ponkey);
87 dev_err(ab8500->dev, "Failed to request dbf IRQ#%d: %d\n",
88 ponkey->irq_dbf, error);
92 error = request_any_context_irq(ponkey->irq_dbr, ab8500_ponkey_handler,
93 0, "ab8500-ponkey-dbr", ponkey);
95 dev_err(ab8500->dev, "Failed to request dbr IRQ#%d: %d\n",
96 ponkey->irq_dbr, error);
97 goto err_free_dbf_irq;
100 error = input_register_device(ponkey->idev);
102 dev_err(ab8500->dev, "Can't register input device: %d\n", error);
103 goto err_free_dbr_irq;
106 platform_set_drvdata(pdev, ponkey);
110 free_irq(ponkey->irq_dbf, ponkey);
112 free_irq(ponkey->irq_dbf, ponkey);
114 input_free_device(input);
120 static int __devexit ab8500_ponkey_remove(struct platform_device *pdev)
122 struct ab8500_ponkey *ponkey = platform_get_drvdata(pdev);
124 free_irq(ponkey->irq_dbf, ponkey);
125 free_irq(ponkey->irq_dbr, ponkey);
126 input_unregister_device(ponkey->idev);
129 platform_set_drvdata(pdev, NULL);
134 static struct platform_driver ab8500_ponkey_driver = {
136 .name = "ab8500-poweron-key",
137 .owner = THIS_MODULE,
139 .probe = ab8500_ponkey_probe,
140 .remove = __devexit_p(ab8500_ponkey_remove),
143 static int __init ab8500_ponkey_init(void)
145 return platform_driver_register(&ab8500_ponkey_driver);
147 module_init(ab8500_ponkey_init);
149 static void __exit ab8500_ponkey_exit(void)
151 platform_driver_unregister(&ab8500_ponkey_driver);
153 module_exit(ab8500_ponkey_exit);
155 MODULE_LICENSE("GPL v2");
156 MODULE_AUTHOR("Sundar Iyer <sundar.iyer@stericsson.com>");
157 MODULE_DESCRIPTION("ST-Ericsson AB8500 Power-ON(Pon) Key driver");