1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * Rockchip RK805 PMIC Power Key driver
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
6*4882a593Smuzhiyun *
7*4882a593Smuzhiyun * Author: Joseph Chen <chenjh@rock-chips.com>
8*4882a593Smuzhiyun */
9*4882a593Smuzhiyun
10*4882a593Smuzhiyun #include <linux/errno.h>
11*4882a593Smuzhiyun #include <linux/init.h>
12*4882a593Smuzhiyun #include <linux/input.h>
13*4882a593Smuzhiyun #include <linux/interrupt.h>
14*4882a593Smuzhiyun #include <linux/kernel.h>
15*4882a593Smuzhiyun #include <linux/module.h>
16*4882a593Smuzhiyun #include <linux/of.h>
17*4882a593Smuzhiyun #include <linux/platform_device.h>
18*4882a593Smuzhiyun
pwrkey_fall_irq(int irq,void * _pwr)19*4882a593Smuzhiyun static irqreturn_t pwrkey_fall_irq(int irq, void *_pwr)
20*4882a593Smuzhiyun {
21*4882a593Smuzhiyun struct input_dev *pwr = _pwr;
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun input_report_key(pwr, KEY_POWER, 1);
24*4882a593Smuzhiyun input_sync(pwr);
25*4882a593Smuzhiyun
26*4882a593Smuzhiyun return IRQ_HANDLED;
27*4882a593Smuzhiyun }
28*4882a593Smuzhiyun
pwrkey_rise_irq(int irq,void * _pwr)29*4882a593Smuzhiyun static irqreturn_t pwrkey_rise_irq(int irq, void *_pwr)
30*4882a593Smuzhiyun {
31*4882a593Smuzhiyun struct input_dev *pwr = _pwr;
32*4882a593Smuzhiyun
33*4882a593Smuzhiyun input_report_key(pwr, KEY_POWER, 0);
34*4882a593Smuzhiyun input_sync(pwr);
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun return IRQ_HANDLED;
37*4882a593Smuzhiyun }
38*4882a593Smuzhiyun
rk805_pwrkey_probe(struct platform_device * pdev)39*4882a593Smuzhiyun static int rk805_pwrkey_probe(struct platform_device *pdev)
40*4882a593Smuzhiyun {
41*4882a593Smuzhiyun struct input_dev *pwr;
42*4882a593Smuzhiyun int fall_irq, rise_irq;
43*4882a593Smuzhiyun struct device_node *np;
44*4882a593Smuzhiyun int err;
45*4882a593Smuzhiyun
46*4882a593Smuzhiyun np = of_get_child_by_name(pdev->dev.parent->of_node, "pwrkey");
47*4882a593Smuzhiyun if (np && !of_device_is_available(np)) {
48*4882a593Smuzhiyun dev_info(&pdev->dev, "device is disabled\n");
49*4882a593Smuzhiyun return -EINVAL;
50*4882a593Smuzhiyun }
51*4882a593Smuzhiyun
52*4882a593Smuzhiyun pwr = devm_input_allocate_device(&pdev->dev);
53*4882a593Smuzhiyun if (!pwr) {
54*4882a593Smuzhiyun dev_err(&pdev->dev, "Can't allocate power button\n");
55*4882a593Smuzhiyun return -ENOMEM;
56*4882a593Smuzhiyun }
57*4882a593Smuzhiyun
58*4882a593Smuzhiyun pwr->name = "rk805 pwrkey";
59*4882a593Smuzhiyun pwr->phys = "rk805_pwrkey/input0";
60*4882a593Smuzhiyun pwr->id.bustype = BUS_HOST;
61*4882a593Smuzhiyun input_set_capability(pwr, EV_KEY, KEY_POWER);
62*4882a593Smuzhiyun
63*4882a593Smuzhiyun fall_irq = platform_get_irq(pdev, 0);
64*4882a593Smuzhiyun if (fall_irq < 0)
65*4882a593Smuzhiyun return fall_irq;
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun rise_irq = platform_get_irq(pdev, 1);
68*4882a593Smuzhiyun if (rise_irq < 0)
69*4882a593Smuzhiyun return rise_irq;
70*4882a593Smuzhiyun
71*4882a593Smuzhiyun err = devm_request_any_context_irq(&pwr->dev, fall_irq,
72*4882a593Smuzhiyun pwrkey_fall_irq,
73*4882a593Smuzhiyun IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
74*4882a593Smuzhiyun "rk805_pwrkey_fall", pwr);
75*4882a593Smuzhiyun if (err < 0) {
76*4882a593Smuzhiyun dev_err(&pdev->dev, "Can't register fall irq: %d\n", err);
77*4882a593Smuzhiyun return err;
78*4882a593Smuzhiyun }
79*4882a593Smuzhiyun
80*4882a593Smuzhiyun err = devm_request_any_context_irq(&pwr->dev, rise_irq,
81*4882a593Smuzhiyun pwrkey_rise_irq,
82*4882a593Smuzhiyun IRQF_TRIGGER_RISING | IRQF_ONESHOT,
83*4882a593Smuzhiyun "rk805_pwrkey_rise", pwr);
84*4882a593Smuzhiyun if (err < 0) {
85*4882a593Smuzhiyun dev_err(&pdev->dev, "Can't register rise irq: %d\n", err);
86*4882a593Smuzhiyun return err;
87*4882a593Smuzhiyun }
88*4882a593Smuzhiyun
89*4882a593Smuzhiyun err = input_register_device(pwr);
90*4882a593Smuzhiyun if (err) {
91*4882a593Smuzhiyun dev_err(&pdev->dev, "Can't register power button: %d\n", err);
92*4882a593Smuzhiyun return err;
93*4882a593Smuzhiyun }
94*4882a593Smuzhiyun
95*4882a593Smuzhiyun platform_set_drvdata(pdev, pwr);
96*4882a593Smuzhiyun device_init_wakeup(&pdev->dev, true);
97*4882a593Smuzhiyun
98*4882a593Smuzhiyun return 0;
99*4882a593Smuzhiyun }
100*4882a593Smuzhiyun
101*4882a593Smuzhiyun static struct platform_driver rk805_pwrkey_driver = {
102*4882a593Smuzhiyun .probe = rk805_pwrkey_probe,
103*4882a593Smuzhiyun .driver = {
104*4882a593Smuzhiyun .name = "rk805-pwrkey",
105*4882a593Smuzhiyun },
106*4882a593Smuzhiyun };
107*4882a593Smuzhiyun module_platform_driver(rk805_pwrkey_driver);
108*4882a593Smuzhiyun
109*4882a593Smuzhiyun MODULE_ALIAS("platform:rk805-pwrkey");
110*4882a593Smuzhiyun MODULE_AUTHOR("Joseph Chen <chenjh@rock-chips.com>");
111*4882a593Smuzhiyun MODULE_DESCRIPTION("RK805 PMIC Power Key driver");
112*4882a593Smuzhiyun MODULE_LICENSE("GPL");
113