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
18static irqreturn_t pwrkey_fall_irq(int irq, void *_pwr)
19{
20    struct input_dev *pwr = _pwr;
21
22    input_report_key(pwr, KEY_POWER, 1);
23    input_sync(pwr);
24
25    return IRQ_HANDLED;
26}
27
28static irqreturn_t pwrkey_rise_irq(int irq, void *_pwr)
29{
30    struct input_dev *pwr = _pwr;
31
32    input_report_key(pwr, KEY_POWER, 0);
33    input_sync(pwr);
34
35    return IRQ_HANDLED;
36}
37
38static 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(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
60    rise_irq = platform_get_irq(pdev, 1);
61    if (rise_irq < 0) {
62        return rise_irq;
63    }
64
65    err = devm_request_any_context_irq(&pwr->dev, fall_irq, pwrkey_fall_irq, IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
66                                       "rk805_pwrkey_fall", 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(&pwr->dev, rise_irq, pwrkey_rise_irq, IRQF_TRIGGER_RISING | IRQF_ONESHOT,
73                                       "rk805_pwrkey_rise", pwr);
74    if (err < 0) {
75        dev_err(&pdev->dev, "Can't register rise irq: %d\n", err);
76        return err;
77    }
78
79    err = input_register_device(pwr);
80    if (err) {
81        dev_err(&pdev->dev, "Can't register power button: %d\n", err);
82        return err;
83    }
84
85    platform_set_drvdata(pdev, pwr);
86    device_init_wakeup(&pdev->dev, true);
87
88    return 0;
89}
90
91static struct platform_driver rk805_pwrkey_driver = {
92    .probe = rk805_pwrkey_probe,
93    .driver =
94        {
95            .name = "rk805-pwrkey",
96        },
97};
98module_platform_driver(rk805_pwrkey_driver);
99
100MODULE_AUTHOR("Joseph Chen <chenjh@rock-chips.com>");
101MODULE_DESCRIPTION("RK805 PMIC Power Key driver");
102MODULE_LICENSE("GPL");
103