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