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70c6cce0 QZ |
1 | /* |
2 | * I2C driver for Marvell 88PM80x | |
3 | * | |
4 | * Copyright (C) 2012 Marvell International Ltd. | |
5 | * Haojian Zhuang <haojian.zhuang@marvell.com> | |
6 | * Joseph(Yossi) Hanin <yhanin@marvell.com> | |
7 | * Qiao Zhou <zhouqiao@marvell.com> | |
8 | * | |
9 | * This program is free software; you can redistribute it and/or modify | |
10 | * it under the terms of the GNU General Public License version 2 as | |
11 | * published by the Free Software Foundation. | |
12 | */ | |
13 | #include <linux/kernel.h> | |
14 | #include <linux/module.h> | |
15 | #include <linux/i2c.h> | |
16 | #include <linux/mfd/88pm80x.h> | |
17 | #include <linux/slab.h> | |
18 | #include <linux/uaccess.h> | |
19 | #include <linux/err.h> | |
20 | ||
21 | ||
22 | const struct regmap_config pm80x_regmap_config = { | |
23 | .reg_bits = 8, | |
24 | .val_bits = 8, | |
25 | }; | |
26 | ||
27 | int __devinit pm80x_init(struct i2c_client *client, | |
28 | const struct i2c_device_id *id) | |
29 | { | |
30 | struct pm80x_chip *chip; | |
31 | struct regmap *map; | |
32 | int ret = 0; | |
33 | ||
34 | chip = | |
35 | devm_kzalloc(&client->dev, sizeof(struct pm80x_chip), GFP_KERNEL); | |
36 | if (!chip) | |
37 | return -ENOMEM; | |
38 | ||
39 | map = devm_regmap_init_i2c(client, &pm80x_regmap_config); | |
40 | if (IS_ERR(map)) { | |
41 | ret = PTR_ERR(map); | |
42 | dev_err(&client->dev, "Failed to allocate register map: %d\n", | |
43 | ret); | |
44 | goto err_regmap_init; | |
45 | } | |
46 | ||
47 | chip->id = id->driver_data; | |
48 | if (chip->id < CHIP_PM800 || chip->id > CHIP_PM805) { | |
49 | ret = -EINVAL; | |
50 | goto err_chip_id; | |
51 | } | |
52 | ||
53 | chip->client = client; | |
54 | chip->regmap = map; | |
55 | ||
56 | chip->irq = client->irq; | |
57 | ||
58 | chip->dev = &client->dev; | |
59 | dev_set_drvdata(chip->dev, chip); | |
60 | i2c_set_clientdata(chip->client, chip); | |
61 | ||
62 | device_init_wakeup(&client->dev, 1); | |
63 | ||
64 | return 0; | |
65 | ||
66 | err_chip_id: | |
67 | regmap_exit(map); | |
68 | err_regmap_init: | |
69 | devm_kfree(&client->dev, chip); | |
70 | return ret; | |
71 | } | |
72 | EXPORT_SYMBOL_GPL(pm80x_init); | |
73 | ||
74 | int __devexit pm80x_deinit(struct i2c_client *client) | |
75 | { | |
76 | struct pm80x_chip *chip = i2c_get_clientdata(client); | |
77 | ||
78 | regmap_exit(chip->regmap); | |
79 | devm_kfree(&client->dev, chip); | |
80 | ||
81 | return 0; | |
82 | } | |
83 | EXPORT_SYMBOL_GPL(pm80x_deinit); | |
84 | ||
85 | #ifdef CONFIG_PM_SLEEP | |
86 | static int pm80x_suspend(struct device *dev) | |
87 | { | |
88 | struct i2c_client *client = container_of(dev, struct i2c_client, dev); | |
89 | struct pm80x_chip *chip = i2c_get_clientdata(client); | |
90 | ||
91 | if (chip && chip->wu_flag) | |
92 | if (device_may_wakeup(chip->dev)) | |
93 | enable_irq_wake(chip->irq); | |
94 | ||
95 | return 0; | |
96 | } | |
97 | ||
98 | static int pm80x_resume(struct device *dev) | |
99 | { | |
100 | struct i2c_client *client = container_of(dev, struct i2c_client, dev); | |
101 | struct pm80x_chip *chip = i2c_get_clientdata(client); | |
102 | ||
103 | if (chip && chip->wu_flag) | |
104 | if (device_may_wakeup(chip->dev)) | |
105 | disable_irq_wake(chip->irq); | |
106 | ||
107 | return 0; | |
108 | } | |
109 | #endif | |
110 | ||
111 | SIMPLE_DEV_PM_OPS(pm80x_pm_ops, pm80x_suspend, pm80x_resume); | |
112 | EXPORT_SYMBOL_GPL(pm80x_pm_ops); | |
113 | ||
114 | MODULE_DESCRIPTION("I2C Driver for Marvell 88PM80x"); | |
115 | MODULE_AUTHOR("Qiao Zhou <zhouqiao@marvell.com>"); | |
116 | MODULE_LICENSE("GPL"); |