blob: 86fed4870f933bed1d8682d10556e12503c5265e [file] [log] [blame]
Russell King48c92022005-09-11 10:27:23 +01001/*
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
Russell Kingdcea83a2008-11-29 11:40:28 +000018#include <mach/dma.h>
Russell King48c92022005-09-11 10:27:23 +010019
20#include "ucb1x00.h"
21
22#define UCB1X00_ATTR(name,input)\
Russell Kingcd4c1eb2008-01-28 10:59:09 +000023static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \
Tony Jones0c554452007-09-25 02:03:03 +020024 char *buf) \
Russell King48c92022005-09-11 10:27:23 +010025{ \
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} \
Tony Jones0c554452007-09-25 02:03:03 +020033static DEVICE_ATTR(name,0444,name##_show,NULL)
Russell King48c92022005-09-11 10:27:23 +010034
35UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1);
36UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0);
37UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2);
38
39static int ucb1x00_assabet_add(struct ucb1x00_dev *dev)
40{
Russell Kingcd4c1eb2008-01-28 10:59:09 +000041 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);
Russell King48c92022005-09-11 10:27:23 +010044 return 0;
45}
46
47static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev)
48{
Russell Kingcd4c1eb2008-01-28 10:59:09 +000049 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);
Russell King48c92022005-09-11 10:27:23 +010052}
53
54static struct ucb1x00_driver ucb1x00_assabet_driver = {
55 .add = ucb1x00_assabet_add,
56 .remove = ucb1x00_assabet_remove,
57};
58
59static int __init ucb1x00_assabet_init(void)
60{
61 return ucb1x00_register_driver(&ucb1x00_assabet_driver);
62}
63
64static void __exit ucb1x00_assabet_exit(void)
65{
66 ucb1x00_unregister_driver(&ucb1x00_assabet_driver);
67}
68
69module_init(ucb1x00_assabet_init);
70module_exit(ucb1x00_assabet_exit);
71
72MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
73MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver");
74MODULE_LICENSE("GPL");