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; | |
69854031 HZ |
90 | info->idev->evbit[0] = BIT_MASK(EV_KEY); |
91 | info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER); | |
92 | ||
93 | ret = input_register_device(info->idev); | |
94 | if (ret) { | |
95 | dev_err(chip->dev, "Can't register input device: %d\n", ret); | |
96 | goto out_reg; | |
97 | } | |
98 | ||
99 | ret = request_threaded_irq(info->irq, NULL, pm860x_onkey_handler, | |
100 | IRQF_ONESHOT, "onkey", info); | |
101 | if (ret < 0) { | |
102 | dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n", | |
103 | info->irq, ret); | |
104 | goto out_irq; | |
105 | } | |
106 | ||
107 | platform_set_drvdata(pdev, info); | |
108 | return 0; | |
109 | ||
110 | out_irq: | |
111 | input_unregister_device(info->idev); | |
112 | kfree(info); | |
113 | return ret; | |
114 | ||
115 | out_reg: | |
116 | input_free_device(info->idev); | |
117 | out: | |
118 | kfree(info); | |
119 | return ret; | |
120 | } | |
121 | ||
122 | static int __devexit pm860x_onkey_remove(struct platform_device *pdev) | |
123 | { | |
124 | struct pm860x_onkey_info *info = platform_get_drvdata(pdev); | |
125 | ||
126 | free_irq(info->irq, info); | |
127 | input_unregister_device(info->idev); | |
128 | kfree(info); | |
129 | return 0; | |
130 | } | |
131 | ||
132 | static struct platform_driver pm860x_onkey_driver = { | |
133 | .driver = { | |
134 | .name = "88pm860x-onkey", | |
135 | .owner = THIS_MODULE, | |
136 | }, | |
137 | .probe = pm860x_onkey_probe, | |
138 | .remove = __devexit_p(pm860x_onkey_remove), | |
139 | }; | |
140 | ||
141 | static int __init pm860x_onkey_init(void) | |
142 | { | |
143 | return platform_driver_register(&pm860x_onkey_driver); | |
144 | } | |
145 | module_init(pm860x_onkey_init); | |
146 | ||
147 | static void __exit pm860x_onkey_exit(void) | |
148 | { | |
149 | platform_driver_unregister(&pm860x_onkey_driver); | |
150 | } | |
151 | module_exit(pm860x_onkey_exit); | |
152 | ||
153 | MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver"); | |
154 | MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); | |
155 | MODULE_LICENSE("GPL"); |