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");