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1 | /* |
2 | * linux/drivers/mfd/ucb1x00-assabet.c | |
3 | * | |
4 | * Copyright (C) 2001-2003 Russell King, All Rights Reserved. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License as published by | |
8 | * the Free Software Foundation; either version 2 of the License. | |
9 | * | |
10 | * We handle the machine-specific bits of the UCB1x00 driver here. | |
11 | */ | |
12 | #include <linux/module.h> | |
13 | #include <linux/init.h> | |
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14 | #include <linux/device.h> |
15 | #include <linux/err.h> | |
48c92022 | 16 | #include <linux/fs.h> |
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17 | #include <linux/gpio_keys.h> |
18 | #include <linux/input.h> | |
19 | #include <linux/platform_device.h> | |
48c92022 | 20 | #include <linux/proc_fs.h> |
c8602edf | 21 | #include <linux/mfd/ucb1x00.h> |
48c92022 | 22 | |
48c92022 | 23 | #define UCB1X00_ATTR(name,input)\ |
cd4c1eb5 | 24 | static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ |
0c55445f | 25 | char *buf) \ |
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26 | { \ |
27 | struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \ | |
28 | int val; \ | |
29 | ucb1x00_adc_enable(ucb); \ | |
30 | val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \ | |
31 | ucb1x00_adc_disable(ucb); \ | |
32 | return sprintf(buf, "%d\n", val); \ | |
33 | } \ | |
0c55445f | 34 | static DEVICE_ATTR(name,0444,name##_show,NULL) |
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35 | |
36 | UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); | |
37 | UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); | |
38 | UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); | |
39 | ||
40 | static int ucb1x00_assabet_add(struct ucb1x00_dev *dev) | |
41 | { | |
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42 | struct ucb1x00 *ucb = dev->ucb; |
43 | struct platform_device *pdev; | |
44 | struct gpio_keys_platform_data keys; | |
45 | static struct gpio_keys_button buttons[6]; | |
46 | unsigned i; | |
47 | ||
48 | memset(buttons, 0, sizeof(buttons)); | |
49 | memset(&keys, 0, sizeof(keys)); | |
50 | ||
51 | for (i = 0; i < ARRAY_SIZE(buttons); i++) { | |
52 | buttons[i].code = BTN_0 + i; | |
53 | buttons[i].gpio = ucb->gpio.base + i; | |
54 | buttons[i].type = EV_KEY; | |
55 | buttons[i].can_disable = true; | |
56 | } | |
57 | ||
58 | keys.buttons = buttons; | |
59 | keys.nbuttons = ARRAY_SIZE(buttons); | |
60 | keys.poll_interval = 50; | |
61 | keys.name = "ucb1x00"; | |
62 | ||
63 | pdev = platform_device_register_data(&ucb->dev, "gpio-keys", -1, | |
64 | &keys, sizeof(keys)); | |
65 | ||
66 | device_create_file(&ucb->dev, &dev_attr_vbatt); | |
67 | device_create_file(&ucb->dev, &dev_attr_vcharger); | |
68 | device_create_file(&ucb->dev, &dev_attr_batt_temp); | |
69 | ||
70 | dev->priv = pdev; | |
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71 | return 0; |
72 | } | |
73 | ||
74 | static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev) | |
75 | { | |
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76 | struct platform_device *pdev = dev->priv; |
77 | ||
78 | if (!IS_ERR(pdev)) | |
79 | platform_device_unregister(pdev); | |
80 | ||
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81 | device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp); |
82 | device_remove_file(&dev->ucb->dev, &dev_attr_vcharger); | |
83 | device_remove_file(&dev->ucb->dev, &dev_attr_vbatt); | |
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84 | } |
85 | ||
86 | static struct ucb1x00_driver ucb1x00_assabet_driver = { | |
87 | .add = ucb1x00_assabet_add, | |
88 | .remove = ucb1x00_assabet_remove, | |
89 | }; | |
90 | ||
91 | static int __init ucb1x00_assabet_init(void) | |
92 | { | |
93 | return ucb1x00_register_driver(&ucb1x00_assabet_driver); | |
94 | } | |
95 | ||
96 | static void __exit ucb1x00_assabet_exit(void) | |
97 | { | |
98 | ucb1x00_unregister_driver(&ucb1x00_assabet_driver); | |
99 | } | |
100 | ||
101 | module_init(ucb1x00_assabet_init); | |
102 | module_exit(ucb1x00_assabet_exit); | |
103 | ||
104 | MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); | |
105 | MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); | |
106 | MODULE_LICENSE("GPL"); |