diff options
Diffstat (limited to 'drivers/input/misc/88pm860x_onkey.c')
| -rw-r--r-- | drivers/input/misc/88pm860x_onkey.c | 155 |
1 files changed, 155 insertions, 0 deletions
diff --git a/drivers/input/misc/88pm860x_onkey.c b/drivers/input/misc/88pm860x_onkey.c new file mode 100644 index 000000000000..4cc82826ea6b --- /dev/null +++ b/drivers/input/misc/88pm860x_onkey.c @@ -0,0 +1,155 @@ +/* + * 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 + chip->irq_base; + + 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), +}; + +static int __init pm860x_onkey_init(void) +{ + return platform_driver_register(&pm860x_onkey_driver); +} +module_init(pm860x_onkey_init); + +static void __exit pm860x_onkey_exit(void) +{ + platform_driver_unregister(&pm860x_onkey_driver); +} +module_exit(pm860x_onkey_exit); + +MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver"); +MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); +MODULE_LICENSE("GPL"); |