Commit | Line | Data |
---|---|---|
96c905f4 QZ |
1 | /* |
2 | * Marvell 88PM80x ONKEY driver | |
3 | * | |
4 | * Copyright (C) 2012 Marvell International Ltd. | |
5 | * Haojian Zhuang <haojian.zhuang@marvell.com> | |
6 | * Qiao Zhou <zhouqiao@marvell.com> | |
7 | * | |
8 | * This file is subject to the terms and conditions of the GNU General | |
9 | * Public License. See the file "COPYING" in the main directory of this | |
10 | * archive for more details. | |
11 | * | |
12 | * This program is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
15 | * GNU General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU General Public License | |
18 | * along with this program; if not, write to the Free Software | |
19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
20 | */ | |
21 | ||
22 | #include <linux/kernel.h> | |
23 | #include <linux/module.h> | |
24 | #include <linux/input.h> | |
25 | #include <linux/mfd/88pm80x.h> | |
26 | #include <linux/regmap.h> | |
27 | #include <linux/slab.h> | |
28 | ||
29 | #define PM800_LONG_ONKEY_EN (1 << 0) | |
30 | #define PM800_LONG_KEY_DELAY (8) /* 1 .. 16 seconds */ | |
31 | #define PM800_LONKEY_PRESS_TIME ((PM800_LONG_KEY_DELAY-1) << 4) | |
32 | #define PM800_LONKEY_PRESS_TIME_MASK (0xF0) | |
33 | #define PM800_SW_PDOWN (1 << 5) | |
34 | ||
35 | struct pm80x_onkey_info { | |
36 | struct input_dev *idev; | |
37 | struct pm80x_chip *pm80x; | |
38 | struct regmap *map; | |
39 | int irq; | |
40 | }; | |
41 | ||
42 | /* 88PM80x gives us an interrupt when ONKEY is held */ | |
43 | static irqreturn_t pm80x_onkey_handler(int irq, void *data) | |
44 | { | |
45 | struct pm80x_onkey_info *info = data; | |
46 | int ret = 0; | |
47 | unsigned int val; | |
48 | ||
49 | ret = regmap_read(info->map, PM800_STATUS_1, &val); | |
50 | if (ret < 0) { | |
51 | dev_err(info->idev->dev.parent, "failed to read status: %d\n", ret); | |
52 | return IRQ_NONE; | |
53 | } | |
54 | val &= PM800_ONKEY_STS1; | |
55 | ||
56 | input_report_key(info->idev, KEY_POWER, val); | |
57 | input_sync(info->idev); | |
58 | ||
59 | return IRQ_HANDLED; | |
60 | } | |
61 | ||
62 | static SIMPLE_DEV_PM_OPS(pm80x_onkey_pm_ops, pm80x_dev_suspend, | |
63 | pm80x_dev_resume); | |
64 | ||
5298cc4c | 65 | static int pm80x_onkey_probe(struct platform_device *pdev) |
96c905f4 QZ |
66 | { |
67 | ||
68 | struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent); | |
69 | struct pm80x_onkey_info *info; | |
70 | int err; | |
71 | ||
72 | info = kzalloc(sizeof(struct pm80x_onkey_info), GFP_KERNEL); | |
73 | if (!info) | |
74 | return -ENOMEM; | |
75 | ||
76 | info->pm80x = chip; | |
77 | ||
78 | info->irq = platform_get_irq(pdev, 0); | |
79 | if (info->irq < 0) { | |
80 | dev_err(&pdev->dev, "No IRQ resource!\n"); | |
81 | err = -EINVAL; | |
82 | goto out; | |
83 | } | |
84 | ||
85 | info->map = info->pm80x->regmap; | |
86 | if (!info->map) { | |
87 | dev_err(&pdev->dev, "no regmap!\n"); | |
88 | err = -EINVAL; | |
89 | goto out; | |
90 | } | |
91 | ||
92 | info->idev = input_allocate_device(); | |
93 | if (!info->idev) { | |
94 | dev_err(&pdev->dev, "Failed to allocate input dev\n"); | |
95 | err = -ENOMEM; | |
96 | goto out; | |
97 | } | |
98 | ||
99 | info->idev->name = "88pm80x_on"; | |
100 | info->idev->phys = "88pm80x_on/input0"; | |
101 | info->idev->id.bustype = BUS_I2C; | |
102 | info->idev->dev.parent = &pdev->dev; | |
103 | info->idev->evbit[0] = BIT_MASK(EV_KEY); | |
104 | __set_bit(KEY_POWER, info->idev->keybit); | |
105 | ||
106 | err = pm80x_request_irq(info->pm80x, info->irq, pm80x_onkey_handler, | |
107 | IRQF_ONESHOT, "onkey", info); | |
108 | if (err < 0) { | |
109 | dev_err(&pdev->dev, "Failed to request IRQ: #%d: %d\n", | |
110 | info->irq, err); | |
111 | goto out_reg; | |
112 | } | |
113 | ||
114 | err = input_register_device(info->idev); | |
115 | if (err) { | |
116 | dev_err(&pdev->dev, "Can't register input device: %d\n", err); | |
117 | goto out_irq; | |
118 | } | |
119 | ||
120 | platform_set_drvdata(pdev, info); | |
121 | ||
122 | /* Enable long onkey detection */ | |
123 | regmap_update_bits(info->map, PM800_RTC_MISC4, PM800_LONG_ONKEY_EN, | |
124 | PM800_LONG_ONKEY_EN); | |
125 | /* Set 8-second interval */ | |
126 | regmap_update_bits(info->map, PM800_RTC_MISC3, | |
127 | PM800_LONKEY_PRESS_TIME_MASK, | |
128 | PM800_LONKEY_PRESS_TIME); | |
129 | ||
130 | device_init_wakeup(&pdev->dev, 1); | |
131 | return 0; | |
132 | ||
133 | out_irq: | |
134 | pm80x_free_irq(info->pm80x, info->irq, info); | |
135 | out_reg: | |
136 | input_free_device(info->idev); | |
137 | out: | |
138 | kfree(info); | |
139 | return err; | |
140 | } | |
141 | ||
e2619cf7 | 142 | static int pm80x_onkey_remove(struct platform_device *pdev) |
96c905f4 QZ |
143 | { |
144 | struct pm80x_onkey_info *info = platform_get_drvdata(pdev); | |
145 | ||
146 | device_init_wakeup(&pdev->dev, 0); | |
147 | pm80x_free_irq(info->pm80x, info->irq, info); | |
148 | input_unregister_device(info->idev); | |
149 | kfree(info); | |
150 | return 0; | |
151 | } | |
152 | ||
153 | static struct platform_driver pm80x_onkey_driver = { | |
154 | .driver = { | |
155 | .name = "88pm80x-onkey", | |
96c905f4 QZ |
156 | .pm = &pm80x_onkey_pm_ops, |
157 | }, | |
158 | .probe = pm80x_onkey_probe, | |
1cb0aa88 | 159 | .remove = pm80x_onkey_remove, |
96c905f4 QZ |
160 | }; |
161 | ||
162 | module_platform_driver(pm80x_onkey_driver); | |
163 | ||
164 | MODULE_LICENSE("GPL"); | |
165 | MODULE_DESCRIPTION("Marvell 88PM80x ONKEY driver"); | |
166 | MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>"); | |
167 | MODULE_ALIAS("platform:88pm80x-onkey"); |