1 /*
2  * Rockchip RK805 PMIC Power Key driver
3  *
4  * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
5  *
6  * Author: Joseph Chen <chenjh@rock-chips.com>
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under  the terms of the GNU General  Public License as published by the
10  * Free Software Foundation; either version 2 of the License, or (at your
11  * option) any later version.
12  */
13 
14 #include <linux/errno.h>
15 #include <linux/init.h>
16 #include <linux/input.h>
17 #include <linux/interrupt.h>
18 #include <linux/kernel.h>
19 #include <linux/module.h>
20 #include <linux/platform_device.h>
21 
22 static irqreturn_t pwrkey_fall_irq(int irq, void *_pwr)
23 {
24 	struct input_dev *pwr = _pwr;
25 
26 	input_report_key(pwr, KEY_POWER, 1);
27 	input_sync(pwr);
28 
29 	return IRQ_HANDLED;
30 }
31 
32 static irqreturn_t pwrkey_rise_irq(int irq, void *_pwr)
33 {
34 	struct input_dev *pwr = _pwr;
35 
36 	input_report_key(pwr, KEY_POWER, 0);
37 	input_sync(pwr);
38 
39 	return IRQ_HANDLED;
40 }
41 
42 static int rk805_pwrkey_probe(struct platform_device *pdev)
43 {
44 	struct input_dev *pwr;
45 	int fall_irq, rise_irq;
46 	int err;
47 
48 	pwr = devm_input_allocate_device(&pdev->dev);
49 	if (!pwr) {
50 		dev_err(&pdev->dev, "Can't allocate power button\n");
51 		return -ENOMEM;
52 	}
53 
54 	pwr->name = "rk805 pwrkey";
55 	pwr->phys = "rk805_pwrkey/input0";
56 	pwr->id.bustype = BUS_HOST;
57 	input_set_capability(pwr, EV_KEY, KEY_POWER);
58 
59 	fall_irq = platform_get_irq(pdev, 0);
60 	if (fall_irq < 0) {
61 		dev_err(&pdev->dev, "Can't get fall irq: %d\n", fall_irq);
62 		return fall_irq;
63 	}
64 
65 	rise_irq = platform_get_irq(pdev, 1);
66 	if (rise_irq < 0) {
67 		dev_err(&pdev->dev, "Can't get rise irq: %d\n", rise_irq);
68 		return rise_irq;
69 	}
70 
71 	err = devm_request_any_context_irq(&pwr->dev, fall_irq,
72 					   pwrkey_fall_irq,
73 					   IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
74 					   "rk805_pwrkey_fall", pwr);
75 	if (err < 0) {
76 		dev_err(&pdev->dev, "Can't register fall irq: %d\n", err);
77 		return err;
78 	}
79 
80 	err = devm_request_any_context_irq(&pwr->dev, rise_irq,
81 					   pwrkey_rise_irq,
82 					   IRQF_TRIGGER_RISING | IRQF_ONESHOT,
83 					   "rk805_pwrkey_rise", pwr);
84 	if (err < 0) {
85 		dev_err(&pdev->dev, "Can't register rise irq: %d\n", err);
86 		return err;
87 	}
88 
89 	err = input_register_device(pwr);
90 	if (err) {
91 		dev_err(&pdev->dev, "Can't register power button: %d\n", err);
92 		return err;
93 	}
94 
95 	platform_set_drvdata(pdev, pwr);
96 	device_init_wakeup(&pdev->dev, true);
97 
98 	return 0;
99 }
100 
101 static struct platform_driver rk805_pwrkey_driver = {
102 	.probe	= rk805_pwrkey_probe,
103 	.driver	= {
104 		.name = "rk805-pwrkey",
105 	},
106 };
107 module_platform_driver(rk805_pwrkey_driver);
108 
109 MODULE_AUTHOR("Joseph Chen <chenjh@rock-chips.com>");
110 MODULE_DESCRIPTION("RK805 PMIC Power Key driver");
111 MODULE_LICENSE("GPL");
112