100 lines
2.4 KiB
C
100 lines
2.4 KiB
C
/*
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* Retu power button driver.
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*
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* Copyright (C) 2004-2010 Nokia Corporation
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*
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* Original code written by Ari Saastamoinen, Juha Yrjölä and Felipe Balbi.
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* Rewritten by Aaro Koskinen.
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*
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* This file is subject to the terms and conditions of the GNU General
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* Public License. See the file "COPYING" in the main directory of this
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* archive for more details.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <linux/irq.h>
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#include <linux/init.h>
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#include <linux/slab.h>
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#include <linux/errno.h>
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#include <linux/input.h>
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/mfd/retu.h>
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#include <linux/interrupt.h>
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#include <linux/platform_device.h>
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#define RETU_STATUS_PWRONX (1 << 5)
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static irqreturn_t retu_pwrbutton_irq(int irq, void *_pwr)
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{
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struct input_dev *idev = _pwr;
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struct retu_dev *rdev = input_get_drvdata(idev);
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bool state;
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state = !(retu_read(rdev, RETU_REG_STATUS) & RETU_STATUS_PWRONX);
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input_report_key(idev, KEY_POWER, state);
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input_sync(idev);
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return IRQ_HANDLED;
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}
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static int retu_pwrbutton_probe(struct platform_device *pdev)
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{
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struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent);
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struct input_dev *idev;
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int irq;
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int error;
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irq = platform_get_irq(pdev, 0);
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if (irq < 0)
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return irq;
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idev = devm_input_allocate_device(&pdev->dev);
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if (!idev)
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return -ENOMEM;
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idev->name = "retu-pwrbutton";
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idev->dev.parent = &pdev->dev;
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input_set_capability(idev, EV_KEY, KEY_POWER);
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input_set_drvdata(idev, rdev);
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error = devm_request_threaded_irq(&pdev->dev, irq,
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NULL, retu_pwrbutton_irq, 0,
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"retu-pwrbutton", idev);
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if (error)
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return error;
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error = input_register_device(idev);
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if (error)
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return error;
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return 0;
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}
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static int retu_pwrbutton_remove(struct platform_device *pdev)
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{
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return 0;
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}
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static struct platform_driver retu_pwrbutton_driver = {
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.probe = retu_pwrbutton_probe,
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.remove = retu_pwrbutton_remove,
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.driver = {
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.name = "retu-pwrbutton",
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.owner = THIS_MODULE,
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},
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};
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module_platform_driver(retu_pwrbutton_driver);
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MODULE_ALIAS("platform:retu-pwrbutton");
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MODULE_DESCRIPTION("Retu Power Button");
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MODULE_AUTHOR("Ari Saastamoinen");
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MODULE_AUTHOR("Felipe Balbi");
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MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
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MODULE_LICENSE("GPL");
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