[deliverable/linux.git] / drivers / input / misc / 88pm860x_onkey.c

/*
 * 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",
		.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");
Commit	Line	Data
69854031 HZ	1	/*
	2	* 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver
	3	*
	4	* Copyright (C) 2009-2010 Marvell International Ltd.
	5	* Haojian Zhuang <haojian.zhuang@marvell.com>
	6	*
	7	* This file is subject to the terms and conditions of the GNU General
	8	* Public License. See the file "COPYING" in the main directory of this
	9	* archive for more details.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/module.h>
	23	#include <linux/platform_device.h>
	24	#include <linux/i2c.h>
	25	#include <linux/input.h>
	26	#include <linux/interrupt.h>
	27	#include <linux/mfd/88pm860x.h>
5a0e3ad6	28	#include <linux/slab.h>
cde51e73	29	#include <linux/device.h>
69854031 HZ	30
	31	#define PM8607_WAKEUP 0x0b
	32
	33	#define LONG_ONKEY_EN (1 << 1)
	34	#define ONKEY_STATUS (1 << 0)
	35
	36	struct pm860x_onkey_info {
	37	struct input_dev *idev;
	38	struct pm860x_chip *chip;
	39	struct i2c_client *i2c;
	40	struct device *dev;
	41	int irq;
	42	};
	43
	44	/* 88PM860x gives us an interrupt when ONKEY is held */
	45	static irqreturn_t pm860x_onkey_handler(int irq, void *data)
	46	{
	47	struct pm860x_onkey_info *info = data;
	48	int ret;
	49
	50	ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
	51	ret &= ONKEY_STATUS;
	52	input_report_key(info->idev, KEY_POWER, ret);
	53	input_sync(info->idev);
	54
	55	/* Enable 8-second long onkey detection */
	56	pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
	57	return IRQ_HANDLED;
	58	}
	59
5298cc4c	60	static int pm860x_onkey_probe(struct platform_device *pdev)
69854031 HZ	61	{
	62	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
	63	struct pm860x_onkey_info *info;
	64	int irq, ret;
	65
	66	irq = platform_get_irq(pdev, 0);
	67	if (irq < 0) {
	68	dev_err(&pdev->dev, "No IRQ resource!\n");
	69	return -EINVAL;
	70	}
	71
cde51e73 HS	72	info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info),
cde51e73 HS	73	GFP_KERNEL);
69854031 HZ	74	if (!info)
	75	return -ENOMEM;
	76	info->chip = chip;
	77	info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
	78	info->dev = &pdev->dev;
c9f560b3	79	info->irq = irq;
69854031	80
cde51e73	81	info->idev = devm_input_allocate_device(&pdev->dev);
69854031 HZ	82	if (!info->idev) {
69854031 HZ	83	dev_err(chip->dev, "Failed to allocate input dev\n");
cde51e73	84	return -ENOMEM;
69854031 HZ	85	}
	86
	87	info->idev->name = "88pm860x_on";
	88	info->idev->phys = "88pm860x_on/input0";
	89	info->idev->id.bustype = BUS_I2C;
	90	info->idev->dev.parent = &pdev->dev;
69854031 HZ	91	info->idev->evbit[0] = BIT_MASK(EV_KEY);
	92	info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
	93
	94	ret = input_register_device(info->idev);
	95	if (ret) {
	96	dev_err(chip->dev, "Can't register input device: %d\n", ret);
cde51e73	97	return ret;
69854031 HZ	98	}
69854031 HZ	99
cde51e73 HS	100	ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
	101	pm860x_onkey_handler, IRQF_ONESHOT,
	102	"onkey", info);
69854031 HZ	103	if (ret < 0) {
	104	dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
	105	info->irq, ret);
cde51e73	106	return ret;
69854031 HZ	107	}
	108
	109	platform_set_drvdata(pdev, info);
2853378b JZ	110	device_init_wakeup(&pdev->dev, 1);
2853378b JZ	111
69854031	112	return 0;
69854031 HZ	113	}
69854031 HZ	114
97a652a8	115	static int __maybe_unused pm860x_onkey_suspend(struct device *dev)
2853378b JZ	116	{
	117	struct platform_device *pdev = to_platform_device(dev);
	118	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
	119
	120	if (device_may_wakeup(dev))
	121	chip->wakeup_flag \|= 1 << PM8607_IRQ_ONKEY;
	122	return 0;
	123	}
97a652a8	124	static int __maybe_unused pm860x_onkey_resume(struct device *dev)
2853378b JZ	125	{
	126	struct platform_device *pdev = to_platform_device(dev);
	127	struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
	128
	129	if (device_may_wakeup(dev))
	130	chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY);
	131	return 0;
	132	}
2853378b JZ	133
	134	static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume);
	135
69854031 HZ	136	static struct platform_driver pm860x_onkey_driver = {
	137	.driver = {
	138	.name = "88pm860x-onkey",
2853378b	139	.pm = &pm860x_onkey_pm_ops,
69854031 HZ	140	},
69854031 HZ	141	.probe = pm860x_onkey_probe,
69854031	142	};
840a746b	143	module_platform_driver(pm860x_onkey_driver);
69854031 HZ	144
	145	MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver");
	146	MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
	147	MODULE_LICENSE("GPL");