| /** |
| * twl4030-pwrbutton.c - TWL4030 Power Button Input Driver |
| * |
| * Copyright (C) 2008-2009 Nokia Corporation |
| * |
| * Written by Peter De Schrijver <[email protected]> |
| * Several fixes by Felipe Balbi <[email protected]> |
| * |
| * 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. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/init.h> |
| #include <linux/kernel.h> |
| #include <linux/errno.h> |
| #include <linux/input.h> |
| #include <linux/interrupt.h> |
| #include <linux/platform_device.h> |
| #include <linux/mfd/twl.h> |
| |
| #define PWR_PWRON_IRQ (1 << 0) |
| |
| #define STS_HW_CONDITIONS 0xf |
| |
| static irqreturn_t powerbutton_irq(int irq, void *_pwr) |
| { |
| struct input_dev *pwr = _pwr; |
| int err; |
| u8 value; |
| |
| err = twl_i2c_read_u8(TWL_MODULE_PM_MASTER, &value, STS_HW_CONDITIONS); |
| if (!err) { |
| pm_wakeup_event(pwr->dev.parent, 0); |
| input_report_key(pwr, KEY_POWER, value & PWR_PWRON_IRQ); |
| input_sync(pwr); |
| } else { |
| dev_err(pwr->dev.parent, "twl4030: i2c error %d while reading" |
| " TWL4030 PM_MASTER STS_HW_CONDITIONS register\n", err); |
| } |
| |
| return IRQ_HANDLED; |
| } |
| |
| static int twl4030_pwrbutton_probe(struct platform_device *pdev) |
| { |
| struct input_dev *pwr; |
| int irq = platform_get_irq(pdev, 0); |
| int err; |
| |
| pwr = devm_input_allocate_device(&pdev->dev); |
| if (!pwr) { |
| dev_err(&pdev->dev, "Can't allocate power button\n"); |
| return -ENOMEM; |
| } |
| |
| input_set_capability(pwr, EV_KEY, KEY_POWER); |
| pwr->name = "twl4030_pwrbutton"; |
| pwr->phys = "twl4030_pwrbutton/input0"; |
| pwr->dev.parent = &pdev->dev; |
| |
| err = devm_request_threaded_irq(&pdev->dev, irq, NULL, powerbutton_irq, |
| IRQF_TRIGGER_FALLING | IRQF_TRIGGER_RISING | |
| IRQF_ONESHOT, |
| "twl4030_pwrbutton", pwr); |
| if (err < 0) { |
| dev_err(&pdev->dev, "Can't get IRQ for pwrbutton: %d\n", err); |
| return err; |
| } |
| |
| err = input_register_device(pwr); |
| if (err) { |
| dev_err(&pdev->dev, "Can't register power button: %d\n", err); |
| return err; |
| } |
| |
| device_init_wakeup(&pdev->dev, true); |
| |
| return 0; |
| } |
| |
| #ifdef CONFIG_OF |
| static const struct of_device_id twl4030_pwrbutton_dt_match_table[] = { |
| { .compatible = "ti,twl4030-pwrbutton" }, |
| {}, |
| }; |
| MODULE_DEVICE_TABLE(of, twl4030_pwrbutton_dt_match_table); |
| #endif |
| |
| static struct platform_driver twl4030_pwrbutton_driver = { |
| .probe = twl4030_pwrbutton_probe, |
| .driver = { |
| .name = "twl4030_pwrbutton", |
| .of_match_table = of_match_ptr(twl4030_pwrbutton_dt_match_table), |
| }, |
| }; |
| module_platform_driver(twl4030_pwrbutton_driver); |
| |
| MODULE_ALIAS("platform:twl4030_pwrbutton"); |
| MODULE_DESCRIPTION("Triton2 Power Button"); |
| MODULE_LICENSE("GPL"); |
| MODULE_AUTHOR("Peter De Schrijver <[email protected]>"); |
| MODULE_AUTHOR("Felipe Balbi <[email protected]>"); |
| |
