LXR linux/drivers/input/misc/rk805-pwrkey.c

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