1 | // SPDX-License-Identifier: GPL-2.0-or-later |
2 | /* |
3 | * Rockchip RK805 PMIC Power Key driver |
4 | * |
5 | * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd |
6 | * |
7 | * Author: Joseph Chen <chenjh@rock-chips.com> |
8 | */ |
9 | |
10 | #include <linux/errno.h> |
11 | #include <linux/init.h> |
12 | #include <linux/input.h> |
13 | #include <linux/interrupt.h> |
14 | #include <linux/kernel.h> |
15 | #include <linux/module.h> |
16 | #include <linux/platform_device.h> |
17 | |
18 | static irqreturn_t pwrkey_fall_irq(int irq, void *_pwr) |
19 | { |
20 | struct input_dev *pwr = _pwr; |
21 | |
22 | input_report_key(dev: pwr, KEY_POWER, value: 1); |
23 | input_sync(dev: pwr); |
24 | |
25 | return IRQ_HANDLED; |
26 | } |
27 | |
28 | static irqreturn_t pwrkey_rise_irq(int irq, void *_pwr) |
29 | { |
30 | struct input_dev *pwr = _pwr; |
31 | |
32 | input_report_key(dev: pwr, KEY_POWER, value: 0); |
33 | input_sync(dev: pwr); |
34 | |
35 | return IRQ_HANDLED; |
36 | } |
37 | |
38 | static int rk805_pwrkey_probe(struct platform_device *pdev) |
39 | { |
40 | struct input_dev *pwr; |
41 | int fall_irq, rise_irq; |
42 | int err; |
43 | |
44 | pwr = devm_input_allocate_device(&pdev->dev); |
45 | if (!pwr) { |
46 | dev_err(&pdev->dev, "Can't allocate power button\n" ); |
47 | return -ENOMEM; |
48 | } |
49 | |
50 | pwr->name = "rk805 pwrkey" ; |
51 | pwr->phys = "rk805_pwrkey/input0" ; |
52 | pwr->id.bustype = BUS_HOST; |
53 | input_set_capability(dev: pwr, EV_KEY, KEY_POWER); |
54 | |
55 | fall_irq = platform_get_irq(pdev, 0); |
56 | if (fall_irq < 0) |
57 | return fall_irq; |
58 | |
59 | rise_irq = platform_get_irq(pdev, 1); |
60 | if (rise_irq < 0) |
61 | return rise_irq; |
62 | |
63 | err = devm_request_any_context_irq(dev: &pwr->dev, irq: fall_irq, |
64 | handler: pwrkey_fall_irq, |
65 | IRQF_TRIGGER_FALLING | IRQF_ONESHOT, |
66 | devname: "rk805_pwrkey_fall" , dev_id: pwr); |
67 | if (err < 0) { |
68 | dev_err(&pdev->dev, "Can't register fall irq: %d\n" , err); |
69 | return err; |
70 | } |
71 | |
72 | err = devm_request_any_context_irq(dev: &pwr->dev, irq: rise_irq, |
73 | handler: pwrkey_rise_irq, |
74 | IRQF_TRIGGER_RISING | IRQF_ONESHOT, |
75 | devname: "rk805_pwrkey_rise" , dev_id: pwr); |
76 | if (err < 0) { |
77 | dev_err(&pdev->dev, "Can't register rise irq: %d\n" , err); |
78 | return err; |
79 | } |
80 | |
81 | err = input_register_device(pwr); |
82 | if (err) { |
83 | dev_err(&pdev->dev, "Can't register power button: %d\n" , err); |
84 | return err; |
85 | } |
86 | |
87 | platform_set_drvdata(pdev, data: pwr); |
88 | device_init_wakeup(dev: &pdev->dev, enable: true); |
89 | |
90 | return 0; |
91 | } |
92 | |
93 | static struct platform_driver rk805_pwrkey_driver = { |
94 | .probe = rk805_pwrkey_probe, |
95 | .driver = { |
96 | .name = "rk805-pwrkey" , |
97 | }, |
98 | }; |
99 | module_platform_driver(rk805_pwrkey_driver); |
100 | |
101 | MODULE_ALIAS("platform:rk805-pwrkey" ); |
102 | MODULE_AUTHOR("Joseph Chen <chenjh@rock-chips.com>" ); |
103 | MODULE_DESCRIPTION("RK805 PMIC Power Key driver" ); |
104 | MODULE_LICENSE("GPL" ); |
105 | |