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5a35b85c JC |
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"); |