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/device.h>
15#include <linux/err.h>
16#include <linux/fs.h>
17#include <linux/gpio_keys.h>
18#include <linux/input.h>
19#include <linux/platform_device.h>
20#include <linux/proc_fs.h>
21#include <linux/mfd/ucb1x00.h>
22
23#define UCB1X00_ATTR(name,input)\
24static ssize_t name##_show(struct device *dev, struct device_attribute *attr, \
25			   char *buf)	\
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}								\
34static DEVICE_ATTR(name,0444,name##_show,NULL)
35
36UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1);
37UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0);
38UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2);
39
40static int ucb1x00_assabet_add(struct ucb1x00_dev *dev)
41{
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;
71	return 0;
72}
73
74static void ucb1x00_assabet_remove(struct ucb1x00_dev *dev)
75{
76	struct platform_device *pdev = dev->priv;
77
78	if (!IS_ERR(pdev))
79		platform_device_unregister(pdev);
80
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);
84}
85
86static struct ucb1x00_driver ucb1x00_assabet_driver = {
87	.add	= ucb1x00_assabet_add,
88	.remove	= ucb1x00_assabet_remove,
89};
90
91static int __init ucb1x00_assabet_init(void)
92{
93	return ucb1x00_register_driver(&ucb1x00_assabet_driver);
94}
95
96static void __exit ucb1x00_assabet_exit(void)
97{
98	ucb1x00_unregister_driver(&ucb1x00_assabet_driver);
99}
100
101module_init(ucb1x00_assabet_init);
102module_exit(ucb1x00_assabet_exit);
103
104MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>");
105MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver");
106MODULE_LICENSE("GPL");
107