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