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	rise_irq = platform_get_irq(pdev, 1);
60	if (rise_irq < 0)
61		return rise_irq;
62
63	err = devm_request_any_context_irq(&pwr->dev, fall_irq,
64					   pwrkey_fall_irq,
65					   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,
73					   pwrkey_rise_irq,
74					   IRQF_TRIGGER_RISING | IRQF_ONESHOT,
75					   "rk805_pwrkey_rise", 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, pwr);
88	device_init_wakeup(&pdev->dev, true);
89
90	return 0;
91}
92
93static struct platform_driver rk805_pwrkey_driver = {
94	.probe	= rk805_pwrkey_probe,
95	.driver	= {
96		.name = "rk805-pwrkey",
97	},
98};
99module_platform_driver(rk805_pwrkey_driver);
100
101MODULE_ALIAS("platform:rk805-pwrkey");
102MODULE_AUTHOR("Joseph Chen <chenjh@rock-chips.com>");
103MODULE_DESCRIPTION("RK805 PMIC Power Key driver");
104MODULE_LICENSE("GPL");
105