169854031SHaojian Zhuang /*
269854031SHaojian Zhuang * 88pm860x_onkey.c - Marvell 88PM860x ONKEY driver
369854031SHaojian Zhuang *
469854031SHaojian Zhuang * Copyright (C) 2009-2010 Marvell International Ltd.
569854031SHaojian Zhuang * Haojian Zhuang <haojian.zhuang@marvell.com>
669854031SHaojian Zhuang *
769854031SHaojian Zhuang * This file is subject to the terms and conditions of the GNU General
869854031SHaojian Zhuang * Public License. See the file "COPYING" in the main directory of this
969854031SHaojian Zhuang * archive for more details.
1069854031SHaojian Zhuang *
1169854031SHaojian Zhuang * This program is distributed in the hope that it will be useful,
1269854031SHaojian Zhuang * but WITHOUT ANY WARRANTY; without even the implied warranty of
1369854031SHaojian Zhuang * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1469854031SHaojian Zhuang * GNU General Public License for more details.
1569854031SHaojian Zhuang *
1669854031SHaojian Zhuang * You should have received a copy of the GNU General Public License
1769854031SHaojian Zhuang * along with this program; if not, write to the Free Software
1869854031SHaojian Zhuang * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
1969854031SHaojian Zhuang */
2069854031SHaojian Zhuang
2169854031SHaojian Zhuang #include <linux/kernel.h>
2269854031SHaojian Zhuang #include <linux/module.h>
2369854031SHaojian Zhuang #include <linux/platform_device.h>
2469854031SHaojian Zhuang #include <linux/i2c.h>
2569854031SHaojian Zhuang #include <linux/input.h>
2669854031SHaojian Zhuang #include <linux/interrupt.h>
2769854031SHaojian Zhuang #include <linux/mfd/88pm860x.h>
285a0e3ad6STejun Heo #include <linux/slab.h>
29cde51e73SHimangi Saraogi #include <linux/device.h>
3069854031SHaojian Zhuang
3169854031SHaojian Zhuang #define PM8607_WAKEUP 0x0b
3269854031SHaojian Zhuang
3369854031SHaojian Zhuang #define LONG_ONKEY_EN (1 << 1)
3469854031SHaojian Zhuang #define ONKEY_STATUS (1 << 0)
3569854031SHaojian Zhuang
3669854031SHaojian Zhuang struct pm860x_onkey_info {
3769854031SHaojian Zhuang struct input_dev *idev;
3869854031SHaojian Zhuang struct pm860x_chip *chip;
3969854031SHaojian Zhuang struct i2c_client *i2c;
4069854031SHaojian Zhuang struct device *dev;
4169854031SHaojian Zhuang int irq;
4269854031SHaojian Zhuang };
4369854031SHaojian Zhuang
4469854031SHaojian Zhuang /* 88PM860x gives us an interrupt when ONKEY is held */
pm860x_onkey_handler(int irq,void * data)4569854031SHaojian Zhuang static irqreturn_t pm860x_onkey_handler(int irq, void *data)
4669854031SHaojian Zhuang {
4769854031SHaojian Zhuang struct pm860x_onkey_info *info = data;
4869854031SHaojian Zhuang int ret;
4969854031SHaojian Zhuang
5069854031SHaojian Zhuang ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2);
5169854031SHaojian Zhuang ret &= ONKEY_STATUS;
5269854031SHaojian Zhuang input_report_key(info->idev, KEY_POWER, ret);
5369854031SHaojian Zhuang input_sync(info->idev);
5469854031SHaojian Zhuang
5569854031SHaojian Zhuang /* Enable 8-second long onkey detection */
5669854031SHaojian Zhuang pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
5769854031SHaojian Zhuang return IRQ_HANDLED;
5869854031SHaojian Zhuang }
5969854031SHaojian Zhuang
pm860x_onkey_probe(struct platform_device * pdev)605298cc4cSBill Pemberton static int pm860x_onkey_probe(struct platform_device *pdev)
6169854031SHaojian Zhuang {
6269854031SHaojian Zhuang struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
6369854031SHaojian Zhuang struct pm860x_onkey_info *info;
6469854031SHaojian Zhuang int irq, ret;
6569854031SHaojian Zhuang
6669854031SHaojian Zhuang irq = platform_get_irq(pdev, 0);
670bec8b7eSStephen Boyd if (irq < 0)
6869854031SHaojian Zhuang return -EINVAL;
6969854031SHaojian Zhuang
70cde51e73SHimangi Saraogi info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info),
71cde51e73SHimangi Saraogi GFP_KERNEL);
7269854031SHaojian Zhuang if (!info)
7369854031SHaojian Zhuang return -ENOMEM;
7469854031SHaojian Zhuang info->chip = chip;
7569854031SHaojian Zhuang info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion;
7669854031SHaojian Zhuang info->dev = &pdev->dev;
77c9f560b3SHaojian Zhuang info->irq = irq;
7869854031SHaojian Zhuang
79cde51e73SHimangi Saraogi info->idev = devm_input_allocate_device(&pdev->dev);
8069854031SHaojian Zhuang if (!info->idev) {
8169854031SHaojian Zhuang dev_err(chip->dev, "Failed to allocate input dev\n");
82cde51e73SHimangi Saraogi return -ENOMEM;
8369854031SHaojian Zhuang }
8469854031SHaojian Zhuang
8569854031SHaojian Zhuang info->idev->name = "88pm860x_on";
8669854031SHaojian Zhuang info->idev->phys = "88pm860x_on/input0";
8769854031SHaojian Zhuang info->idev->id.bustype = BUS_I2C;
8869854031SHaojian Zhuang info->idev->dev.parent = &pdev->dev;
8969854031SHaojian Zhuang info->idev->evbit[0] = BIT_MASK(EV_KEY);
9069854031SHaojian Zhuang info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
9169854031SHaojian Zhuang
9269854031SHaojian Zhuang ret = input_register_device(info->idev);
9369854031SHaojian Zhuang if (ret) {
9469854031SHaojian Zhuang dev_err(chip->dev, "Can't register input device: %d\n", ret);
95cde51e73SHimangi Saraogi return ret;
9669854031SHaojian Zhuang }
9769854031SHaojian Zhuang
98cde51e73SHimangi Saraogi ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
99cde51e73SHimangi Saraogi pm860x_onkey_handler, IRQF_ONESHOT,
100cde51e73SHimangi Saraogi "onkey", info);
10169854031SHaojian Zhuang if (ret < 0) {
10269854031SHaojian Zhuang dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
10369854031SHaojian Zhuang info->irq, ret);
104cde51e73SHimangi Saraogi return ret;
10569854031SHaojian Zhuang }
10669854031SHaojian Zhuang
10769854031SHaojian Zhuang platform_set_drvdata(pdev, info);
1082853378bSJett.Zhou device_init_wakeup(&pdev->dev, 1);
1092853378bSJett.Zhou
11069854031SHaojian Zhuang return 0;
11169854031SHaojian Zhuang }
11269854031SHaojian Zhuang
pm860x_onkey_suspend(struct device * dev)113*72924c1cSJonathan Cameron static int pm860x_onkey_suspend(struct device *dev)
1142853378bSJett.Zhou {
1152853378bSJett.Zhou struct platform_device *pdev = to_platform_device(dev);
1162853378bSJett.Zhou struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
1172853378bSJett.Zhou
1182853378bSJett.Zhou if (device_may_wakeup(dev))
1192853378bSJett.Zhou chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY;
1202853378bSJett.Zhou return 0;
1212853378bSJett.Zhou }
pm860x_onkey_resume(struct device * dev)122*72924c1cSJonathan Cameron static int pm860x_onkey_resume(struct device *dev)
1232853378bSJett.Zhou {
1242853378bSJett.Zhou struct platform_device *pdev = to_platform_device(dev);
1252853378bSJett.Zhou struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
1262853378bSJett.Zhou
1272853378bSJett.Zhou if (device_may_wakeup(dev))
1282853378bSJett.Zhou chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY);
1292853378bSJett.Zhou return 0;
1302853378bSJett.Zhou }
1312853378bSJett.Zhou
132*72924c1cSJonathan Cameron static DEFINE_SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops,
133*72924c1cSJonathan Cameron pm860x_onkey_suspend, pm860x_onkey_resume);
1342853378bSJett.Zhou
13569854031SHaojian Zhuang static struct platform_driver pm860x_onkey_driver = {
13669854031SHaojian Zhuang .driver = {
13769854031SHaojian Zhuang .name = "88pm860x-onkey",
138*72924c1cSJonathan Cameron .pm = pm_sleep_ptr(&pm860x_onkey_pm_ops),
13969854031SHaojian Zhuang },
14069854031SHaojian Zhuang .probe = pm860x_onkey_probe,
14169854031SHaojian Zhuang };
142840a746bSJJ Ding module_platform_driver(pm860x_onkey_driver);
14369854031SHaojian Zhuang
14469854031SHaojian Zhuang MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver");
14569854031SHaojian Zhuang MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
14669854031SHaojian Zhuang MODULE_LICENSE("GPL");
147