| /* |
| * 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver |
| * |
| * Copyright (C) 2009-2010 Marvell International Ltd. |
| * Haojian Zhuang <haojian.zhuang@marvell.com> |
| * |
| * 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/kernel.h> |
| #include <linux/module.h> |
| #include <linux/platform_device.h> |
| #include <linux/i2c.h> |
| #include <linux/input.h> |
| #include <linux/interrupt.h> |
| #include <linux/mfd/88pm860x.h> |
| #include <linux/slab.h> |
| #include <linux/device.h> |
| |
| #define PM8607_WAKEUP 0x0b |
| |
| #define LONG_ONKEY_EN (1 << 1) |
| #define ONKEY_STATUS (1 << 0) |
| |
| struct pm860x_onkey_info { |
| struct input_dev *idev; |
| struct pm860x_chip *chip; |
| struct i2c_client *i2c; |
| struct device *dev; |
| int irq; |
| }; |
| |
| /* 88PM860x gives us an interrupt when ONKEY is held */ |
| static irqreturn_t pm860x_onkey_handler(int irq, void *data) |
| { |
| struct pm860x_onkey_info *info = data; |
| int ret; |
| |
| ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); |
| ret &= ONKEY_STATUS; |
| input_report_key(info->idev, KEY_POWER, ret); |
| input_sync(info->idev); |
| |
| /* Enable 8-second long onkey detection */ |
| pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN); |
| return IRQ_HANDLED; |
| } |
| |
| static int pm860x_onkey_probe(struct platform_device *pdev) |
| { |
| struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
| struct pm860x_onkey_info *info; |
| int irq, ret; |
| |
| irq = platform_get_irq(pdev, 0); |
| if (irq < 0) { |
| dev_err(&pdev->dev, "No IRQ resource!\n"); |
| return -EINVAL; |
| } |
| |
| info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info), |
| GFP_KERNEL); |
| if (!info) |
| return -ENOMEM; |
| info->chip = chip; |
| info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion; |
| info->dev = &pdev->dev; |
| info->irq = irq; |
| |
| info->idev = devm_input_allocate_device(&pdev->dev); |
| if (!info->idev) { |
| dev_err(chip->dev, "Failed to allocate input dev\n"); |
| return -ENOMEM; |
| } |
| |
| info->idev->name = "88pm860x_on"; |
| info->idev->phys = "88pm860x_on/input0"; |
| info->idev->id.bustype = BUS_I2C; |
| info->idev->dev.parent = &pdev->dev; |
| info->idev->evbit[0] = BIT_MASK(EV_KEY); |
| info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER); |
| |
| ret = input_register_device(info->idev); |
| if (ret) { |
| dev_err(chip->dev, "Can't register input device: %d\n", ret); |
| return ret; |
| } |
| |
| ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL, |
| pm860x_onkey_handler, IRQF_ONESHOT, |
| "onkey", info); |
| if (ret < 0) { |
| dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", |
| info->irq, ret); |
| return ret; |
| } |
| |
| platform_set_drvdata(pdev, info); |
| device_init_wakeup(&pdev->dev, 1); |
| |
| return 0; |
| } |
| |
| static int __maybe_unused pm860x_onkey_suspend(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
| |
| if (device_may_wakeup(dev)) |
| chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY; |
| return 0; |
| } |
| static int __maybe_unused pm860x_onkey_resume(struct device *dev) |
| { |
| struct platform_device *pdev = to_platform_device(dev); |
| struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); |
| |
| if (device_may_wakeup(dev)) |
| chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY); |
| return 0; |
| } |
| |
| static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume); |
| |
| static struct platform_driver pm860x_onkey_driver = { |
| .driver = { |
| .name = "88pm860x-onkey", |
| .owner = THIS_MODULE, |
| .pm = &pm860x_onkey_pm_ops, |
| }, |
| .probe = pm860x_onkey_probe, |
| }; |
| module_platform_driver(pm860x_onkey_driver); |
| |
| MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver"); |
| MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); |
| MODULE_LICENSE("GPL"); |