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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 | ||
5298cc4c | 59 | static int pm860x_onkey_probe(struct platform_device *pdev) |
69854031 HZ |
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; | |
c9f560b3 | 77 | info->irq = irq; |
69854031 HZ |
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); | |
2853378b JZ |
108 | device_init_wakeup(&pdev->dev, 1); |
109 | ||
69854031 HZ |
110 | return 0; |
111 | ||
112 | out_irq: | |
113 | input_unregister_device(info->idev); | |
114 | kfree(info); | |
115 | return ret; | |
116 | ||
117 | out_reg: | |
118 | input_free_device(info->idev); | |
119 | out: | |
120 | kfree(info); | |
121 | return ret; | |
122 | } | |
123 | ||
e2619cf7 | 124 | static int pm860x_onkey_remove(struct platform_device *pdev) |
69854031 HZ |
125 | { |
126 | struct pm860x_onkey_info *info = platform_get_drvdata(pdev); | |
127 | ||
128 | free_irq(info->irq, info); | |
129 | input_unregister_device(info->idev); | |
130 | kfree(info); | |
131 | return 0; | |
132 | } | |
133 | ||
2853378b JZ |
134 | #ifdef CONFIG_PM_SLEEP |
135 | static int pm860x_onkey_suspend(struct device *dev) | |
136 | { | |
137 | struct platform_device *pdev = to_platform_device(dev); | |
138 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
139 | ||
140 | if (device_may_wakeup(dev)) | |
141 | chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY; | |
142 | return 0; | |
143 | } | |
144 | static int pm860x_onkey_resume(struct device *dev) | |
145 | { | |
146 | struct platform_device *pdev = to_platform_device(dev); | |
147 | struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
148 | ||
149 | if (device_may_wakeup(dev)) | |
150 | chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY); | |
151 | return 0; | |
152 | } | |
153 | #endif | |
154 | ||
155 | static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume); | |
156 | ||
69854031 HZ |
157 | static struct platform_driver pm860x_onkey_driver = { |
158 | .driver = { | |
159 | .name = "88pm860x-onkey", | |
160 | .owner = THIS_MODULE, | |
2853378b | 161 | .pm = &pm860x_onkey_pm_ops, |
69854031 HZ |
162 | }, |
163 | .probe = pm860x_onkey_probe, | |
1cb0aa88 | 164 | .remove = pm860x_onkey_remove, |
69854031 | 165 | }; |
840a746b | 166 | module_platform_driver(pm860x_onkey_driver); |
69854031 HZ |
167 | |
168 | MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver"); | |
169 | MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>"); | |
170 | MODULE_LICENSE("GPL"); |