This source file includes following definitions.
- pm860x_onkey_handler
- pm860x_onkey_probe
- pm860x_onkey_suspend
- pm860x_onkey_resume
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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>
28 #include <linux/slab.h>
29 #include <linux/device.h>
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
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
56 pm860x_set_bits(info->i2c, PM8607_WAKEUP, 3, LONG_ONKEY_EN);
57 return IRQ_HANDLED;
58 }
59
60 static int pm860x_onkey_probe(struct platform_device *pdev)
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 return -EINVAL;
69
70 info = devm_kzalloc(&pdev->dev, sizeof(struct pm860x_onkey_info),
71 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;
78
79 info->idev = devm_input_allocate_device(&pdev->dev);
80 if (!info->idev) {
81 dev_err(chip->dev, "Failed to allocate input dev\n");
82 return -ENOMEM;
83 }
84
85 info->idev->name = "88pm860x_on";
86 info->idev->phys = "88pm860x_on/input0";
87 info->idev->id.bustype = BUS_I2C;
88 info->idev->dev.parent = &pdev->dev;
89 info->idev->evbit[0] = BIT_MASK(EV_KEY);
90 info->idev->keybit[BIT_WORD(KEY_POWER)] = BIT_MASK(KEY_POWER);
91
92 ret = input_register_device(info->idev);
93 if (ret) {
94 dev_err(chip->dev, "Can't register input device: %d\n", ret);
95 return ret;
96 }
97
98 ret = devm_request_threaded_irq(&pdev->dev, info->irq, NULL,
99 pm860x_onkey_handler, IRQF_ONESHOT,
100 "onkey", info);
101 if (ret < 0) {
102 dev_err(chip->dev, "Failed to request IRQ: #%d: %d\n",
103 info->irq, ret);
104 return ret;
105 }
106
107 platform_set_drvdata(pdev, info);
108 device_init_wakeup(&pdev->dev, 1);
109
110 return 0;
111 }
112
113 static int __maybe_unused pm860x_onkey_suspend(struct device *dev)
114 {
115 struct platform_device *pdev = to_platform_device(dev);
116 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
117
118 if (device_may_wakeup(dev))
119 chip->wakeup_flag |= 1 << PM8607_IRQ_ONKEY;
120 return 0;
121 }
122 static int __maybe_unused pm860x_onkey_resume(struct device *dev)
123 {
124 struct platform_device *pdev = to_platform_device(dev);
125 struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
126
127 if (device_may_wakeup(dev))
128 chip->wakeup_flag &= ~(1 << PM8607_IRQ_ONKEY);
129 return 0;
130 }
131
132 static SIMPLE_DEV_PM_OPS(pm860x_onkey_pm_ops, pm860x_onkey_suspend, pm860x_onkey_resume);
133
134 static struct platform_driver pm860x_onkey_driver = {
135 .driver = {
136 .name = "88pm860x-onkey",
137 .pm = &pm860x_onkey_pm_ops,
138 },
139 .probe = pm860x_onkey_probe,
140 };
141 module_platform_driver(pm860x_onkey_driver);
142
143 MODULE_DESCRIPTION("Marvell 88PM860x ONKEY driver");
144 MODULE_AUTHOR("Haojian Zhuang <haojian.zhuang@marvell.com>");
145 MODULE_LICENSE("GPL");