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48c92022 RK |
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> | |
14 | #include <linux/fs.h> | |
15 | #include <linux/proc_fs.h> | |
16 | #include <linux/device.h> | |
17 | ||
18 | #include <asm/dma.h> | |
19 | ||
20 | #include "ucb1x00.h" | |
21 | ||
22 | #define UCB1X00_ATTR(name,input)\ | |
23 | static ssize_t name##_show(struct class_device *dev, char *buf) \ | |
24 | { \ | |
25 | struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \ | |
26 | int val; \ | |
27 | ucb1x00_adc_enable(ucb); \ | |
28 | val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \ | |
29 | ucb1x00_adc_disable(ucb); \ | |
30 | return sprintf(buf, "%d\n", val); \ | |
31 | } \ | |
32 | static CLASS_DEVICE_ATTR(name,0444,name##_show,NULL) | |
33 | ||
34 | UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); | |
35 | UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); | |
36 | UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); | |
37 | ||
38 | static int ucb1x00_assabet_add(struct ucb1x00_dev *dev) | |
39 | { | |
40 | class_device_create_file(&dev->ucb->cdev, &class_device_attr_vbatt); | |
41 | class_device_create_file(&dev->ucb->cdev, &class_device_attr_vcharger); | |
42 | class_device_create_file(&dev->ucb->cdev, &class_device_attr_batt_temp); | |
43 | return 0; | |
44 | } | |
45 | ||
46 | static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev) | |
47 | { | |
48 | class_device_remove_file(&dev->ucb->cdev, &class_device_attr_batt_temp); | |
49 | class_device_remove_file(&dev->ucb->cdev, &class_device_attr_vcharger); | |
50 | class_device_remove_file(&dev->ucb->cdev, &class_device_attr_vbatt); | |
51 | } | |
52 | ||
53 | static struct ucb1x00_driver ucb1x00_assabet_driver = { | |
54 | .add = ucb1x00_assabet_add, | |
55 | .remove = ucb1x00_assabet_remove, | |
56 | }; | |
57 | ||
58 | static int __init ucb1x00_assabet_init(void) | |
59 | { | |
60 | return ucb1x00_register_driver(&ucb1x00_assabet_driver); | |
61 | } | |
62 | ||
63 | static void __exit ucb1x00_assabet_exit(void) | |
64 | { | |
65 | ucb1x00_unregister_driver(&ucb1x00_assabet_driver); | |
66 | } | |
67 | ||
68 | module_init(ucb1x00_assabet_init); | |
69 | module_exit(ucb1x00_assabet_exit); | |
70 | ||
71 | MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); | |
72 | MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); | |
73 | MODULE_LICENSE("GPL"); |