112 lines
2.6 KiB
C
Executable file
112 lines
2.6 KiB
C
Executable file
/*
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* Rockchip RK805 PMIC Power Key driver
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*
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* Copyright (c) 2017, Fuzhou Rockchip Electronics Co., Ltd
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*
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* Author: Joseph Chen <chenjh@rock-chips.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/errno.h>
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#include <linux/init.h>
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#include <linux/input.h>
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#include <linux/interrupt.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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static irqreturn_t pwrkey_fall_irq(int irq, void *_pwr)
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{
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struct input_dev *pwr = _pwr;
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input_report_key(pwr, KEY_POWER, 1);
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input_sync(pwr);
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return IRQ_HANDLED;
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}
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static irqreturn_t pwrkey_rise_irq(int irq, void *_pwr)
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{
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struct input_dev *pwr = _pwr;
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input_report_key(pwr, KEY_POWER, 0);
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input_sync(pwr);
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return IRQ_HANDLED;
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}
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static int rk805_pwrkey_probe(struct platform_device *pdev)
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{
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struct input_dev *pwr;
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int fall_irq, rise_irq;
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int err;
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pwr = devm_input_allocate_device(&pdev->dev);
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if (!pwr) {
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dev_err(&pdev->dev, "Can't allocate power button\n");
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return -ENOMEM;
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}
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pwr->name = "rk805 pwrkey";
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pwr->phys = "rk805_pwrkey/input0";
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pwr->id.bustype = BUS_HOST;
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input_set_capability(pwr, EV_KEY, KEY_POWER);
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fall_irq = platform_get_irq(pdev, 0);
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if (fall_irq < 0) {
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dev_err(&pdev->dev, "Can't get fall irq: %d\n", fall_irq);
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return fall_irq;
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}
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rise_irq = platform_get_irq(pdev, 1);
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if (rise_irq < 0) {
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dev_err(&pdev->dev, "Can't get rise irq: %d\n", rise_irq);
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return rise_irq;
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}
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err = devm_request_any_context_irq(&pwr->dev, fall_irq,
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pwrkey_fall_irq,
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IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
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"rk805_pwrkey_fall", pwr);
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if (err < 0) {
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dev_err(&pdev->dev, "Can't register fall irq: %d\n", err);
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return err;
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}
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err = devm_request_any_context_irq(&pwr->dev, rise_irq,
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pwrkey_rise_irq,
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IRQF_TRIGGER_RISING | IRQF_ONESHOT,
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"rk805_pwrkey_rise", pwr);
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if (err < 0) {
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dev_err(&pdev->dev, "Can't register rise irq: %d\n", err);
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return err;
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}
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err = input_register_device(pwr);
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if (err) {
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dev_err(&pdev->dev, "Can't register power button: %d\n", err);
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return err;
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}
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platform_set_drvdata(pdev, pwr);
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device_init_wakeup(&pdev->dev, true);
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return 0;
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}
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static struct platform_driver rk805_pwrkey_driver = {
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.probe = rk805_pwrkey_probe,
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.driver = {
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.name = "rk805-pwrkey",
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},
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};
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module_platform_driver(rk805_pwrkey_driver);
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MODULE_AUTHOR("Joseph Chen <chenjh@rock-chips.com>");
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MODULE_DESCRIPTION("RK805 PMIC Power Key driver");
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MODULE_LICENSE("GPL");
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