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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> |
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), |
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) { |
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 | } |
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); |
111 | ||
69854031 | 112 | return 0; |
69854031 HZ |
113 | } |
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 | }, |
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"); |