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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> | |
c8602edf | 17 | #include <linux/mfd/ucb1x00.h> |
48c92022 | 18 | |
48c92022 | 19 | #define UCB1X00_ATTR(name,input)\ |
cd4c1eb5 | 20 | static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \ |
0c55445f | 21 | char *buf) \ |
48c92022 RK |
22 | { \ |
23 | struct ucb1x00 *ucb = classdev_to_ucb1x00(dev); \ | |
24 | int val; \ | |
25 | ucb1x00_adc_enable(ucb); \ | |
26 | val = ucb1x00_adc_read(ucb, input, UCB_NOSYNC); \ | |
27 | ucb1x00_adc_disable(ucb); \ | |
28 | return sprintf(buf, "%d\n", val); \ | |
29 | } \ | |
0c55445f | 30 | static DEVICE_ATTR(name,0444,name##_show,NULL) |
48c92022 RK |
31 | |
32 | UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); | |
33 | UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); | |
34 | UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); | |
35 | ||
36 | static int ucb1x00_assabet_add(struct ucb1x00_dev *dev) | |
37 | { | |
cd4c1eb5 RK |
38 | device_create_file(&dev->ucb->dev, &dev_attr_vbatt); |
39 | device_create_file(&dev->ucb->dev, &dev_attr_vcharger); | |
40 | device_create_file(&dev->ucb->dev, &dev_attr_batt_temp); | |
48c92022 RK |
41 | return 0; |
42 | } | |
43 | ||
44 | static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev) | |
45 | { | |
cd4c1eb5 RK |
46 | device_remove_file(&dev->ucb->dev, &dev_attr_batt_temp); |
47 | device_remove_file(&dev->ucb->dev, &dev_attr_vcharger); | |
48 | device_remove_file(&dev->ucb->dev, &dev_attr_vbatt); | |
48c92022 RK |
49 | } |
50 | ||
51 | static struct ucb1x00_driver ucb1x00_assabet_driver = { | |
52 | .add = ucb1x00_assabet_add, | |
53 | .remove = ucb1x00_assabet_remove, | |
54 | }; | |
55 | ||
56 | static int __init ucb1x00_assabet_init(void) | |
57 | { | |
58 | return ucb1x00_register_driver(&ucb1x00_assabet_driver); | |
59 | } | |
60 | ||
61 | static void __exit ucb1x00_assabet_exit(void) | |
62 | { | |
63 | ucb1x00_unregister_driver(&ucb1x00_assabet_driver); | |
64 | } | |
65 | ||
66 | module_init(ucb1x00_assabet_init); | |
67 | module_exit(ucb1x00_assabet_exit); | |
68 | ||
69 | MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); | |
70 | MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); | |
71 | MODULE_LICENSE("GPL"); |