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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)\ |
24 | static 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 | } \ |
34 | static DEVICE_ATTR(name,0444,name##_show,NULL) |
35 | |
36 | UCB1X00_ATTR(vbatt, UCB_ADC_INP_AD1); |
37 | UCB1X00_ATTR(vcharger, UCB_ADC_INP_AD0); |
38 | UCB1X00_ATTR(batt_temp, UCB_ADC_INP_AD2); |
39 | |
40 | static 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 | |
74 | static 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 | |
86 | static struct ucb1x00_driver ucb1x00_assabet_driver = { |
87 | .add = ucb1x00_assabet_add, |
88 | .remove = ucb1x00_assabet_remove, |
89 | }; |
90 | |
91 | static int __init ucb1x00_assabet_init(void) |
92 | { |
93 | return ucb1x00_register_driver(&ucb1x00_assabet_driver); |
94 | } |
95 | |
96 | static void __exit ucb1x00_assabet_exit(void) |
97 | { |
98 | ucb1x00_unregister_driver(&ucb1x00_assabet_driver); |
99 | } |
100 | |
101 | module_init(ucb1x00_assabet_init); |
102 | module_exit(ucb1x00_assabet_exit); |
103 | |
104 | MODULE_AUTHOR("Russell King <rmk@arm.linux.org.uk>"); |
105 | MODULE_DESCRIPTION("Assabet noddy testing only example ADC driver"); |
106 | MODULE_LICENSE("GPL"); |
107 |
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