2 * Retu power button driver.
4 * Copyright (C) 2004-2010 Nokia Corporation
6 * Original code written by Ari Saastamoinen, Juha Yrjölä and Felipe Balbi.
7 * Rewritten by Aaro Koskinen.
9 * This file is subject to the terms and conditions of the GNU General
10 * Public License. See the file "COPYING" in the main directory of this
11 * archive for more details.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
19 #include <linux/irq.h>
20 #include <linux/init.h>
21 #include <linux/slab.h>
22 #include <linux/errno.h>
23 #include <linux/input.h>
24 #include <linux/kernel.h>
25 #include <linux/module.h>
26 #include <linux/mfd/retu.h>
27 #include <linux/interrupt.h>
28 #include <linux/platform_device.h>
30 #define RETU_STATUS_PWRONX (1 << 5)
32 static irqreturn_t retu_pwrbutton_irq(int irq, void *_pwr)
34 struct input_dev *idev = _pwr;
35 struct retu_dev *rdev = input_get_drvdata(idev);
38 state = !(retu_read(rdev, RETU_REG_STATUS) & RETU_STATUS_PWRONX);
39 input_report_key(idev, KEY_POWER, state);
45 static int __devinit retu_pwrbutton_probe(struct platform_device *pdev)
47 struct retu_dev *rdev = dev_get_drvdata(pdev->dev.parent);
48 struct input_dev *idev;
52 irq = platform_get_irq(pdev, 0);
56 idev = devm_input_allocate_device(&pdev->dev);
60 idev->name = "retu-pwrbutton";
61 idev->dev.parent = &pdev->dev;
63 input_set_capability(idev, EV_KEY, KEY_POWER);
64 input_set_drvdata(idev, rdev);
66 error = devm_request_threaded_irq(&pdev->dev, irq,
67 NULL, retu_pwrbutton_irq, 0,
68 "retu-pwrbutton", idev);
72 error = input_register_device(idev);
79 static int __devexit retu_pwrbutton_remove(struct platform_device *pdev)
84 static struct platform_driver retu_pwrbutton_driver = {
85 .probe = retu_pwrbutton_probe,
86 .remove = retu_pwrbutton_remove,
88 .name = "retu-pwrbutton",
92 module_platform_driver(retu_pwrbutton_driver);
94 MODULE_ALIAS("platform:retu-pwrbutton");
95 MODULE_DESCRIPTION("Retu Power Button");
96 MODULE_AUTHOR("Ari Saastamoinen");
97 MODULE_AUTHOR("Felipe Balbi");
98 MODULE_AUTHOR("Aaro Koskinen <aaro.koskinen@iki.fi>");
99 MODULE_LICENSE("GPL");