git://bbs.cooldavid.org / net-next-2.6.git / blame
| 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> |
| 69854031 HZ |
29 | |
| 30 | #define PM8607_WAKEUP 0x0b | |
| 31 | ||
| 32 | #define LONG_ONKEY_EN (1 << 1) | |
| 33 | #define ONKEY_STATUS (1 << 0) | |
| 34 | ||
| 35 | struct pm860x_onkey_info { | |
| 36 | struct input_dev *idev; | |
| 37 | struct pm860x_chip *chip; | |
| 38 | struct i2c_client *i2c; | |
| 39 | struct device *dev; | |
| 40 | int irq; | |
| 41 | }; | |
| 42 | ||
| 43 | /* 88PM860x gives us an interrupt when ONKEY is held */ | |
| 44 | static irqreturn_t pm860x_onkey_handler(int irq, void *data) | |
| 45 | { | |
| 46 | struct pm860x_onkey_info *info = data; | |
| 47 | int ret; | |
| 48 | ||
| 49 | ret = pm860x_reg_read(info->i2c, PM8607_STATUS_2); | |
| 50 | ret &= ONKEY_STATUS; | |
| 51 | input_report_key(info->idev, KEY_POWER, ret); | |
| 52 | input_sync(info->idev); | |
| 53 | ||
| 54 | /* Enable 8-second long onkey detection */ | |
| 55 | pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN); | |
| 56 | return IRQ_HANDLED; | |
| 57 | } | |
| 58 | ||
| 59 | static int __devinit pm860x_onkey_probe(struct platform_device *pdev) | |
| 60 | { | |
| 61 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
| 62 | struct pm860x_onkey_info *info; | |
| 63 | int irq, ret; | |
| 64 | ||
| 65 | irq = platform_get_irq(pdev, 0); | |
| 66 | if (irq < 0) { | |
| 67 | dev_err(&pdev->dev, "No IRQ resource!\n"); | |
| 68 | return -EINVAL; | |
| 69 | } | |
| 70 | ||
| 71 | info = kzalloc(sizeof(struct pm860x_onkey_info), GFP_KERNEL); | |
| 72 | if (!info) | |
| 73 | return -ENOMEM; | |
| 74 | info->chip = chip; | |
| 75 | info->i2c = (chip->id == CHIP_PM8607) ? chip->client : chip->companion; | |
| 76 | info->dev = &pdev->dev; | |
| 77 | info->irq = irq + chip->irq_base; | |
| 78 | ||
| 79 | info->idev = input_allocate_device(); | |
| 80 | if (!info->idev) { | |
| 81 | dev_err(chip->dev, "Failed to allocate input dev\n"); | |
| 82 | ret = -ENOMEM; | |
| 83 | goto out; | |
| 84 | } | |
| 85 | ||
| 86 | info->idev->name = "88pm860x_on"; | |
| 87 | info->idev->phys = "88pm860x_on/input0"; | |
| 88 | info->idev->id.bustype = BUS_I2C; | |
| 89 | info->idev->dev.parent = &pdev->dev; | |
| 90 | info->irq = irq; | |
| 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); | |
| 97 | goto out_reg; | |
| 98 | } | |
| 99 | ||
| 100 | ret = request_threaded_irq(info->irq, NULL, pm860x_onkey_handler, | |
| 101 | IRQF_ONESHOT, "onkey", info); | |
| 102 | if (ret < 0) { | |
| 103 | dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", | |
| 104 | info->irq, ret); | |
| 105 | goto out_irq; | |
| 106 | } | |
| 107 | ||
| 108 | platform_set_drvdata(pdev, info); | |
| 109 | return 0; | |
| 110 | ||
| 111 | out_irq: | |
| 112 | input_unregister_device(info->idev); | |
| 113 | kfree(info); | |
| 114 | return ret; | |
| 115 | ||
| 116 | out_reg: | |
| 117 | input_free_device(info->idev); | |
| 118 | out: | |
| 119 | kfree(info); | |
| 120 | return ret; | |
| 121 | } | |
| 122 | ||
| 123 | static int __devexit pm860x_onkey_remove(struct platform_device *pdev) | |
| 124 | { | |
| 125 | struct pm860x_onkey_info *info = platform_get_drvdata(pdev); | |
| 126 | ||
| 127 | free_irq(info->irq, info); | |
| 128 | input_unregister_device(info->idev); | |
| 129 | kfree(info); | |
| 130 | return 0; | |
| 131 | } | |
| 132 | ||
| 133 | static struct platform_driver pm860x_onkey_driver = { | |
| 134 | .driver = { | |
| 135 | .name = "88pm860x-onkey", | |
| 136 | .owner = THIS_MODULE, | |
| 137 | }, | |
| 138 | .probe = pm860x_onkey_probe, | |
| 139 | .remove = __devexit_p(pm860x_onkey_remove), | |
| 140 | }; | |
| 141 | ||
| 142 | static int __init pm860x_onkey_init(void) | |
| 143 | { | |
| 144 | return platform_driver_register(&pm860x_onkey_driver); | |
| 145 | } | |
| 146 | module_init(pm860x_onkey_init); | |
| 147 | ||
| 148 | static void __exit pm860x_onkey_exit(void) | |
| 149 | { | |
| 150 | platform_driver_unregister(&pm860x_onkey_driver); | |
| 151 | } | |
| 152 | module_exit(pm860x_onkey_exit); | |
| 153 | ||
| 154 | MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver"); | |
| 155 | MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); | |
| 156 | MODULE_LICENSE("GPL"); |