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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)\ | |
cd4c1eb5 | 23 | static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ |
0c55445f | 24 | char *buf) \ |
48c92022 RK |
25 | { \ |
26 | struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \ | |
27 | int val; \ | |
28 | ucb1x00_adc_enable(ucb); \ | |
29 | val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \ | |
30 | ucb1x00_adc_disable(ucb); \ | |
31 | return sprintf(buf, "%d\n", val); \ | |
32 | } \ | |
0c55445f | 33 | static DEVICE_ATTR(name,0444,name##_show,NULL) |
48c92022 RK |
34 | |
35 | UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); | |
36 | UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); | |
37 | UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); | |
38 | ||
39 | static int ucb1x00_assabet_add(struct ucb1x00_dev *dev) | |
40 | { | |
cd4c1eb5 RK |
41 | device_create_file(&dev->ucb->dev, &dev_attr_vbatt); |
42 | device_create_file(&dev->ucb->dev, &dev_attr_vcharger); | |
43 | device_create_file(&dev->ucb->dev, &dev_attr_batt_temp); | |
48c92022 RK |
44 | return 0; |
45 | } | |
46 | ||
47 | static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev) | |
48 | { | |
cd4c1eb5 RK |
49 | device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp); |
50 | device_remove_file(&dev->ucb->dev, &dev_attr_vcharger); | |
51 | device_remove_file(&dev->ucb->dev, &dev_attr_vbatt); | |
48c92022 RK |
52 | } |
53 | ||
54 | static struct ucb1x00_driver ucb1x00_assabet_driver = { | |
55 | .add = ucb1x00_assabet_add, | |
56 | .remove = ucb1x00_assabet_remove, | |
57 | }; | |
58 | ||
59 | static int __init ucb1x00_assabet_init(void) | |
60 | { | |
61 | return ucb1x00_register_driver(&ucb1x00_assabet_driver); | |
62 | } | |
63 | ||
64 | static void __exit ucb1x00_assabet_exit(void) | |
65 | { | |
66 | ucb1x00_unregister_driver(&ucb1x00_assabet_driver); | |
67 | } | |
68 | ||
69 | module_init(ucb1x00_assabet_init); | |
70 | module_exit(ucb1x00_assabet_exit); | |
71 | ||
72 | MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); | |
73 | MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); | |
74 | MODULE_LICENSE("GPL"); |