/* * 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> #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 __devinit 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 = kzalloc(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 = input_allocate_device(); if (!info->idev) { dev_err(chip->dev, "Failed to allocate input dev\n"); ret = -ENOMEM; goto out; } 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); goto out_reg; } ret = request_threaded_irq(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); goto out_irq; } platform_set_drvdata(pdev, info); return 0; out_irq: input_unregister_device(info->idev); kfree(info); return ret; out_reg: input_free_device(info->idev); out: kfree(info); return ret; } static int __devexit pm860x_onkey_remove(struct platform_device *pdev) { struct pm860x_onkey_info *info = platform_get_drvdata(pdev); free_irq(info->irq, info); input_unregister_device(info->idev); kfree(info); return 0; } static struct platform_driver pm860x_onkey_driver = { .driver = { .name = "88pm860x-onkey", .owner = THIS_MODULE, }, .probe = pm860x_onkey_probe, .remove = __devexit_p(pm860x_onkey_remove), }; module_platform_driver(pm860x_onkey_driver); MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver"); MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); MODULE_LICENSE("GPL");